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Enable PV backends with Xen/KVM emulation

Browse source 
This is phase 2, following on from the basic platform support which was
 already merged.
 
  • Add a simple single-tenant internal XenStore implementation
  • Indirect Xen gnttab/evtchn/foreignmem/xenstore through operations table
  • Provide emulated back ends for Xen operations
  • Header cleanups to allow PV back ends to build without Xen itself
  • Enable PV back ends in emulated mode
  • Documentation update
 
 Tested-by: Paul Durrant <paul@xen.org>
 ... on real Xen (master branch, 4.18) with a Debian guest.
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 =JGLX
 -----END PGP SIGNATURE-----

Merge tag 'xenfv-2' of git://git.infradead.org/users/dwmw2/qemu into staging

Enable PV backends with Xen/KVM emulation

This is phase 2, following on from the basic platform support which was
already merged.

 • Add a simple single-tenant internal XenStore implementation
 • Indirect Xen gnttab/evtchn/foreignmem/xenstore through operations table
 • Provide emulated back ends for Xen operations
 • Header cleanups to allow PV back ends to build without Xen itself
 • Enable PV back ends in emulated mode
 • Documentation update

Tested-by: Paul Durrant <paul@xen.org>
... on real Xen (master branch, 4.18) with a Debian guest.

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# KlBZS/PmvCZKb0DHLI3GhXIyzD+/fnLtGSRl0rYObnKP7im+MpEDGmn97f6nIITk
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# -----END PGP SIGNATURE-----
# gpg: Signature made Tue 07 Mar 2023 22:32:28 GMT
# gpg:                using RSA key 314B08ACD0DE481133A5F2869BE980FD0AC01544
# gpg:                issuer "dwmw@amazon.co.uk"
# gpg: Good signature from "David Woodhouse <dwmw@amazon.co.uk>" [unknown]
# gpg:                 aka "David Woodhouse <dwmw@amazon.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 314B 08AC D0DE 4811 33A5  F286 9BE9 80FD 0AC0 1544

* tag 'xenfv-2' of git://git.infradead.org/users/dwmw2/qemu: (27 commits)
  docs: Update Xen-on-KVM documentation for PV disk support
  MAINTAINERS: Add entry for Xen on KVM emulation
  i386/xen: Initialize Xen backends from pc_basic_device_init() for emulation
  hw/xen: Implement soft reset for emulated gnttab
  hw/xen: Map guest XENSTORE_PFN grant in emulated Xenstore
  hw/xen: Add emulated implementation of XenStore operations
  hw/xen: Add emulated implementation of grant table operations
  hw/xen: Hook up emulated implementation for event channel operations
  hw/xen: Only advertise ring-page-order for xen-block if gnttab supports it
  hw/xen: Avoid crash when backend watch fires too early
  hw/xen: Build PV backend drivers for CONFIG_XEN_BUS
  hw/xen: Rename xen_common.h to xen_native.h
  hw/xen: Use XEN_PAGE_SIZE in PV backend drivers
  hw/xen: Move xenstore_store_pv_console_info to xen_console.c
  hw/xen: Add xenstore operations to allow redirection to internal emulation
  hw/xen: Add foreignmem operations to allow redirection to internal emulation
  hw/xen: Pass grant ref to gnttab unmap operation
  hw/xen: Add gnttab operations to allow redirection to internal emulation
  hw/xen: Add evtchn operations to allow redirection to internal emulation
  hw/xen: Create initial XenStore nodes
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2023-03-09 13:22:05 +00:00
commit 15002921e8
53 changed files with 5811 additions and 934 deletions
Download patch file Download diff file Expand all files Collapse all files

2
hw/9pfs/meson.build
View file

@ -15,7 +15,7 @@ fs_ss.add(files(
))
fs_ss.add(when: 'CONFIG_LINUX', if_true: files('9p-util-linux.c'))
fs_ss.add(when: 'CONFIG_DARWIN', if_true: files('9p-util-darwin.c'))
fs_ss.add(when: 'CONFIG_XEN', if_true: files('xen-9p-backend.c'))
fs_ss.add(when: 'CONFIG_XEN_BUS', if_true: files('xen-9p-backend.c'))
softmmu_ss.add_all(when: 'CONFIG_FSDEV_9P', if_true: fs_ss)
specific_ss.add(when: 'CONFIG_VIRTIO_9P', if_true: files('virtio-9p-device.c'))

32
hw/9pfs/xen-9p-backend.c
View file

@ -22,6 +22,7 @@
#include "qemu/config-file.h"
#include "qemu/main-loop.h"
#include "qemu/option.h"
#include "qemu/iov.h"
#include "fsdev/qemu-fsdev.h"
#define VERSIONS "1"
@ -241,7 +242,7 @@ static void xen_9pfs_push_and_notify(V9fsPDU *pdu)
xen_wmb();
ring->inprogress = false;
xenevtchn_notify(ring->evtchndev, ring->local_port);
qemu_xen_evtchn_notify(ring->evtchndev, ring->local_port);
qemu_bh_schedule(ring->bh);
}
@ -324,8 +325,8 @@ static void xen_9pfs_evtchn_event(void *opaque)
Xen9pfsRing *ring = opaque;
evtchn_port_t port;
port = xenevtchn_pending(ring->evtchndev);
xenevtchn_unmask(ring->evtchndev, port);
port = qemu_xen_evtchn_pending(ring->evtchndev);
qemu_xen_evtchn_unmask(ring->evtchndev, port);
qemu_bh_schedule(ring->bh);
}
@ -337,10 +338,10 @@ static void xen_9pfs_disconnect(struct XenLegacyDevice *xendev)
for (i = 0; i < xen_9pdev->num_rings; i++) {
if (xen_9pdev->rings[i].evtchndev != NULL) {
qemu_set_fd_handler(xenevtchn_fd(xen_9pdev->rings[i].evtchndev),
NULL, NULL, NULL);
xenevtchn_unbind(xen_9pdev->rings[i].evtchndev,
xen_9pdev->rings[i].local_port);
qemu_set_fd_handler(qemu_xen_evtchn_fd(xen_9pdev->rings[i].evtchndev),
NULL, NULL, NULL);
qemu_xen_evtchn_unbind(xen_9pdev->rings[i].evtchndev,
xen_9pdev->rings[i].local_port);
xen_9pdev->rings[i].evtchndev = NULL;
}
}
@ -359,12 +360,13 @@ static int xen_9pfs_free(struct XenLegacyDevice *xendev)
if (xen_9pdev->rings[i].data != NULL) {
xen_be_unmap_grant_refs(&xen_9pdev->xendev,
xen_9pdev->rings[i].data,
xen_9pdev->rings[i].intf->ref,
(1 << xen_9pdev->rings[i].ring_order));
}
if (xen_9pdev->rings[i].intf != NULL) {
xen_be_unmap_grant_refs(&xen_9pdev->xendev,
xen_9pdev->rings[i].intf,
1);
xen_be_unmap_grant_ref(&xen_9pdev->xendev,
xen_9pdev->rings[i].intf,
xen_9pdev->rings[i].ref);
}
if (xen_9pdev->rings[i].bh != NULL) {
qemu_bh_delete(xen_9pdev->rings[i].bh);
@ -447,12 +449,12 @@ static int xen_9pfs_connect(struct XenLegacyDevice *xendev)
xen_9pdev->rings[i].inprogress = false;
xen_9pdev->rings[i].evtchndev = xenevtchn_open(NULL, 0);
xen_9pdev->rings[i].evtchndev = qemu_xen_evtchn_open();
if (xen_9pdev->rings[i].evtchndev == NULL) {
goto out;
}
qemu_set_cloexec(xenevtchn_fd(xen_9pdev->rings[i].evtchndev));
xen_9pdev->rings[i].local_port = xenevtchn_bind_interdomain
qemu_set_cloexec(qemu_xen_evtchn_fd(xen_9pdev->rings[i].evtchndev));
xen_9pdev->rings[i].local_port = qemu_xen_evtchn_bind_interdomain
(xen_9pdev->rings[i].evtchndev,
xendev->dom,
xen_9pdev->rings[i].evtchn);
@ -463,8 +465,8 @@ static int xen_9pfs_connect(struct XenLegacyDevice *xendev)
goto out;
}
xen_pv_printf(xendev, 2, "bind evtchn port %d\n", xendev->local_port);
qemu_set_fd_handler(xenevtchn_fd(xen_9pdev->rings[i].evtchndev),
xen_9pfs_evtchn_event, NULL, &xen_9pdev->rings[i]);
qemu_set_fd_handler(qemu_xen_evtchn_fd(xen_9pdev->rings[i].evtchndev),
xen_9pfs_evtchn_event, NULL, &xen_9pdev->rings[i]);
}
xen_9pdev->security_model = xenstore_read_be_str(xendev, "security_model");

2
hw/block/dataplane/meson.build
View file

@ -1,2 +1,2 @@
specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c'))
specific_ss.add(when: 'CONFIG_XEN', if_true: files('xen-block.c'))
specific_ss.add(when: 'CONFIG_XEN_BUS', if_true: files('xen-block.c'))

12
hw/block/dataplane/xen-block.c
View file

@ -23,8 +23,9 @@
#include "qemu/main-loop.h"
#include "qemu/memalign.h"
#include "qapi/error.h"
#include "hw/xen/xen_common.h"
#include "hw/xen/xen.h"
#include "hw/block/xen_blkif.h"
#include "hw/xen/interface/io/ring.h"
#include "sysemu/block-backend.h"
#include "sysemu/iothread.h"
#include "xen-block.h"
@ -101,9 +102,9 @@ static XenBlockRequest *xen_block_start_request(XenBlockDataPlane *dataplane)
* re-use requests, allocate the memory once here. It will be freed
* xen_block_dataplane_destroy() when the request list is freed.
*/
request->buf = qemu_memalign(XC_PAGE_SIZE,
request->buf = qemu_memalign(XEN_PAGE_SIZE,
BLKIF_MAX_SEGMENTS_PER_REQUEST *
XC_PAGE_SIZE);
XEN_PAGE_SIZE);
dataplane->requests_total++;
qemu_iovec_init(&request->v, 1);
} else {
@ -185,7 +186,7 @@ static int xen_block_parse_request(XenBlockRequest *request)
goto err;
}
if (request->req.seg[i].last_sect * dataplane->sector_size >=
XC_PAGE_SIZE) {
XEN_PAGE_SIZE) {
error_report("error: page crossing");
goto err;
}
@ -705,6 +706,7 @@ void xen_block_dataplane_stop(XenBlockDataPlane *dataplane)
Error *local_err = NULL;
xen_device_unmap_grant_refs(xendev, dataplane->sring,
dataplane->ring_ref,
dataplane->nr_ring_ref, &local_err);
dataplane->sring = NULL;
@ -739,7 +741,7 @@ void xen_block_dataplane_start(XenBlockDataPlane *dataplane,
dataplane->protocol = protocol;
ring_size = XC_PAGE_SIZE * dataplane->nr_ring_ref;
ring_size = XEN_PAGE_SIZE * dataplane->nr_ring_ref;
switch (dataplane->protocol) {
case BLKIF_PROTOCOL_NATIVE:
{

2
hw/block/meson.build
View file

@ -14,7 +14,7 @@ softmmu_ss.add(when: 'CONFIG_PFLASH_CFI02', if_true: files('pflash_cfi02.c'))
softmmu_ss.add(when: 'CONFIG_SSI_M25P80', if_true: files('m25p80.c'))
softmmu_ss.add(when: 'CONFIG_SSI_M25P80', if_true: files('m25p80_sfdp.c'))
softmmu_ss.add(when: 'CONFIG_SWIM', if_true: files('swim.c'))
softmmu_ss.add(when: 'CONFIG_XEN', if_true: files('xen-block.c'))
softmmu_ss.add(when: 'CONFIG_XEN_BUS', if_true: files('xen-block.c'))
softmmu_ss.add(when: 'CONFIG_TC58128', if_true: files('tc58128.c'))
specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c', 'virtio-blk-common.c'))

12
hw/block/xen-block.c
View file

@ -19,7 +19,6 @@
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qstring.h"
#include "qom/object_interfaces.h"
#include "hw/xen/xen_common.h"
#include "hw/block/xen_blkif.h"
#include "hw/qdev-properties.h"
#include "hw/xen/xen-block.h"
@ -84,7 +83,8 @@ static void xen_block_connect(XenDevice *xendev, Error **errp)
g_free(ring_ref);
return;
}
} else if (order <= blockdev->props.max_ring_page_order) {
} else if (qemu_xen_gnttab_can_map_multi() &&
order <= blockdev->props.max_ring_page_order) {
unsigned int i;
nr_ring_ref = 1 << order;
@ -256,8 +256,12 @@ static void xen_block_realize(XenDevice *xendev, Error **errp)
}
xen_device_backend_printf(xendev, "feature-flush-cache", "%u", 1);
xen_device_backend_printf(xendev, "max-ring-page-order", "%u",
blockdev->props.max_ring_page_order);
if (qemu_xen_gnttab_can_map_multi()) {
xen_device_backend_printf(xendev, "max-ring-page-order", "%u",
blockdev->props.max_ring_page_order);
}
xen_device_backend_printf(xendev, "info", "%u", blockdev->info);
xen_device_frontend_printf(xendev, "virtual-device", "%lu",

2
hw/char/meson.build
View file

@ -18,7 +18,7 @@ softmmu_ss.add(when: 'CONFIG_SERIAL_PCI', if_true: files('serial-pci.c'))
softmmu_ss.add(when: 'CONFIG_SERIAL_PCI_MULTI', if_true: files('serial-pci-multi.c'))
softmmu_ss.add(when: 'CONFIG_SHAKTI_UART', if_true: files('shakti_uart.c'))
softmmu_ss.add(when: 'CONFIG_VIRTIO_SERIAL', if_true: files('virtio-console.c'))
softmmu_ss.add(when: 'CONFIG_XEN', if_true: files('xen_console.c'))
softmmu_ss.add(when: 'CONFIG_XEN_BUS', if_true: files('xen_console.c'))
softmmu_ss.add(when: 'CONFIG_XILINX', if_true: files('xilinx_uartlite.c'))
softmmu_ss.add(when: 'CONFIG_AVR_USART', if_true: files('avr_usart.c'))

57
hw/char/xen_console.c
View file

@ -173,6 +173,48 @@ static void xencons_send(struct XenConsole *con)
/* -------------------------------------------------------------------- */
static int store_con_info(struct XenConsole *con)
{
Chardev *cs = qemu_chr_fe_get_driver(&con->chr);
char *pts = NULL;
char *dom_path;
GString *path;
int ret = -1;
/* Only continue if we're talking to a pty. */
if (!CHARDEV_IS_PTY(cs)) {
return 0;
}
pts = cs->filename + 4;
dom_path = qemu_xen_xs_get_domain_path(xenstore, xen_domid);
if (!dom_path) {
return 0;
}
path = g_string_new(dom_path);
free(dom_path);
if (con->xendev.dev) {
g_string_append_printf(path, "/device/console/%d", con->xendev.dev);
} else {
g_string_append(path, "/console");
}
g_string_append(path, "/tty");
if (xenstore_write_str(con->console, path->str, pts)) {
fprintf(stderr, "xenstore_write_str for '%s' fail", path->str);
goto out;
}
ret = 0;
out:
g_string_free(path, true);
free(path);
return ret;
}
static int con_init(struct XenLegacyDevice *xendev)
{
struct XenConsole *con = container_of(xendev, struct XenConsole, xendev);
@ -181,7 +223,7 @@ static int con_init(struct XenLegacyDevice *xendev)
const char *output;
/* setup */
dom = xs_get_domain_path(xenstore, con->xendev.dom);
dom = qemu_xen_xs_get_domain_path(xenstore, con->xendev.dom);
if (!xendev->dev) {
snprintf(con->console, sizeof(con->console), "%s/console", dom);
} else {
@ -215,8 +257,7 @@ static int con_init(struct XenLegacyDevice *xendev)
&error_abort);
}
xenstore_store_pv_console_info(con->xendev.dev,
qemu_chr_fe_get_driver(&con->chr));
store_con_info(con);
out:
g_free(type);
@ -237,9 +278,9 @@ static int con_initialise(struct XenLegacyDevice *xendev)
if (!xendev->dev) {
xen_pfn_t mfn = con->ring_ref;
con->sring = xenforeignmemory_map(xen_fmem, con->xendev.dom,
PROT_READ | PROT_WRITE,
1, &mfn, NULL);
con->sring = qemu_xen_foreignmem_map(con->xendev.dom, NULL,
PROT_READ | PROT_WRITE,
1, &mfn, NULL);
} else {
con->sring = xen_be_map_grant_ref(xendev, con->ring_ref,
PROT_READ | PROT_WRITE);
@ -269,9 +310,9 @@ static void con_disconnect(struct XenLegacyDevice *xendev)
if (con->sring) {
if (!xendev->dev) {
xenforeignmemory_unmap(xen_fmem, con->sring, 1);
qemu_xen_foreignmem_unmap(con->sring, 1);
} else {
xen_be_unmap_grant_ref(xendev, con->sring);
xen_be_unmap_grant_ref(xendev, con->sring, con->ring_ref);
}
con->sring = NULL;
}

2
hw/display/meson.build
View file

@ -14,7 +14,7 @@ softmmu_ss.add(when: 'CONFIG_PL110', if_true: files('pl110.c'))
softmmu_ss.add(when: 'CONFIG_SII9022', if_true: files('sii9022.c'))
softmmu_ss.add(when: 'CONFIG_SSD0303', if_true: files('ssd0303.c'))
softmmu_ss.add(when: 'CONFIG_SSD0323', if_true: files('ssd0323.c'))
softmmu_ss.add(when: 'CONFIG_XEN', if_true: files('xenfb.c'))
softmmu_ss.add(when: 'CONFIG_XEN_BUS', if_true: files('xenfb.c'))
softmmu_ss.add(when: 'CONFIG_VGA_PCI', if_true: files('vga-pci.c'))
softmmu_ss.add(when: 'CONFIG_VGA_ISA', if_true: files('vga-isa.c'))

32
hw/display/xenfb.c
View file

@ -98,8 +98,9 @@ static int common_bind(struct common *c)
if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1)
return -1;
c->page = xenforeignmemory_map(xen_fmem, c->xendev.dom,
PROT_READ | PROT_WRITE, 1, &mfn, NULL);
c->page = qemu_xen_foreignmem_map(c->xendev.dom, NULL,
PROT_READ | PROT_WRITE, 1, &mfn,
NULL);
if (c->page == NULL)
return -1;
@ -115,7 +116,7 @@ static void common_unbind(struct common *c)
{
xen_pv_unbind_evtchn(&c->xendev);
if (c->page) {
xenforeignmemory_unmap(xen_fmem, c->page, 1);
qemu_xen_foreignmem_unmap(c->page, 1);
c->page = NULL;
}
}
@ -488,27 +489,28 @@ static int xenfb_map_fb(struct XenFB *xenfb)
}
if (xenfb->pixels) {
munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
munmap(xenfb->pixels, xenfb->fbpages * XEN_PAGE_SIZE);
xenfb->pixels = NULL;
}
xenfb->fbpages = DIV_ROUND_UP(xenfb->fb_len, XC_PAGE_SIZE);
xenfb->fbpages = DIV_ROUND_UP(xenfb->fb_len, XEN_PAGE_SIZE);
n_fbdirs = xenfb->fbpages * mode / 8;
n_fbdirs = DIV_ROUND_UP(n_fbdirs, XC_PAGE_SIZE);
n_fbdirs = DIV_ROUND_UP(n_fbdirs, XEN_PAGE_SIZE);
pgmfns = g_new0(xen_pfn_t, n_fbdirs);
fbmfns = g_new0(xen_pfn_t, xenfb->fbpages);
xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd);
map = xenforeignmemory_map(xen_fmem, xenfb->c.xendev.dom,
PROT_READ, n_fbdirs, pgmfns, NULL);
map = qemu_xen_foreignmem_map(xenfb->c.xendev.dom, NULL, PROT_READ,
n_fbdirs, pgmfns, NULL);
if (map == NULL)
goto out;
xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map);
xenforeignmemory_unmap(xen_fmem, map, n_fbdirs);
qemu_xen_foreignmem_unmap(map, n_fbdirs);
xenfb->pixels = xenforeignmemory_map(xen_fmem, xenfb->c.xendev.dom,
PROT_READ, xenfb->fbpages, fbmfns, NULL);
xenfb->pixels = qemu_xen_foreignmem_map(xenfb->c.xendev.dom, NULL,
PROT_READ, xenfb->fbpages,
fbmfns, NULL);
if (xenfb->pixels == NULL)
goto out;
@ -526,8 +528,8 @@ static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim,
{
size_t mfn_sz = sizeof_field(struct xenfb_page, pd[0]);
size_t pd_len = sizeof_field(struct xenfb_page, pd) / mfn_sz;
size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz;
size_t fb_len_max = fb_pages * XC_PAGE_SIZE;
size_t fb_pages = pd_len * XEN_PAGE_SIZE / mfn_sz;
size_t fb_len_max = fb_pages * XEN_PAGE_SIZE;
int max_width, max_height;
if (fb_len_lim > fb_len_max) {
@ -927,8 +929,8 @@ static void fb_disconnect(struct XenLegacyDevice *xendev)
* Replacing the framebuffer with anonymous shared memory
* instead. This releases the guest pages and keeps qemu happy.
*/
xenforeignmemory_unmap(xen_fmem, fb->pixels, fb->fbpages);
fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
qemu_xen_foreignmem_unmap(fb->pixels, fb->fbpages);
fb->pixels = mmap(fb->pixels, fb->fbpages * XEN_PAGE_SIZE,
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
-1, 0);
if (fb->pixels == MAP_FAILED) {

1
hw/i386/kvm/meson.build
View file

@ -9,6 +9,7 @@ i386_kvm_ss.add(when: 'CONFIG_XEN_EMU', if_true: files(
'xen_evtchn.c',
'xen_gnttab.c',
'xen_xenstore.c',
'xenstore_impl.c',
))
i386_ss.add_all(when: 'CONFIG_KVM', if_true: i386_kvm_ss)

15
hw/i386/kvm/trace-events
View file

@ -3,3 +3,18 @@ kvm_xen_unmap_pirq(int pirq, int gsi) "pirq %d gsi %d"
kvm_xen_get_free_pirq(int pirq, int type) "pirq %d type %d"
kvm_xen_bind_pirq(int pirq, int port) "pirq %d port %d"
kvm_xen_unmask_pirq(int pirq, char *dev, int vector) "pirq %d dev %s vector %d"
xenstore_error(unsigned int id, unsigned int tx_id, const char *err) "req %u tx %u err %s"
xenstore_read(unsigned int tx_id, const char *path) "tx %u path %s"
xenstore_write(unsigned int tx_id, const char *path) "tx %u path %s"
xenstore_mkdir(unsigned int tx_id, const char *path) "tx %u path %s"
xenstore_directory(unsigned int tx_id, const char *path) "tx %u path %s"
xenstore_directory_part(unsigned int tx_id, const char *path, unsigned int offset) "tx %u path %s offset %u"
xenstore_transaction_start(unsigned int new_tx) "new_tx %u"
xenstore_transaction_end(unsigned int tx_id, bool commit) "tx %u commit %d"
xenstore_rm(unsigned int tx_id, const char *path) "tx %u path %s"
xenstore_get_perms(unsigned int tx_id, const char *path) "tx %u path %s"
xenstore_set_perms(unsigned int tx_id, const char *path) "tx %u path %s"
xenstore_watch(const char *path, const char *token) "path %s token %s"
xenstore_unwatch(const char *path, const char *token) "path %s token %s"
xenstore_reset_watches(void) ""
xenstore_watch_event(const char *path, const char *token) "path %s token %s"

15
hw/i386/kvm/xen_evtchn.c
View file

@ -34,6 +34,7 @@
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "hw/irq.h"
#include "hw/xen/xen_backend_ops.h"
#include "xen_evtchn.h"
#include "xen_overlay.h"
@ -278,6 +279,17 @@ static const TypeInfo xen_evtchn_info = {
.class_init = xen_evtchn_class_init,
};
static struct evtchn_backend_ops emu_evtchn_backend_ops = {
.open = xen_be_evtchn_open,
.bind_interdomain = xen_be_evtchn_bind_interdomain,
.unbind = xen_be_evtchn_unbind,
.close = xen_be_evtchn_close,
.get_fd = xen_be_evtchn_fd,
.notify = xen_be_evtchn_notify,
.unmask = xen_be_evtchn_unmask,
.pending = xen_be_evtchn_pending,
};
static void gsi_assert_bh(void *opaque)
{
struct vcpu_info *vi = kvm_xen_get_vcpu_info_hva(0);
@ -318,6 +330,9 @@ void xen_evtchn_create(void)
s->nr_pirq_inuse_words = DIV_ROUND_UP(s->nr_pirqs, 64);
s->pirq_inuse_bitmap = g_new0(uint64_t, s->nr_pirq_inuse_words);
s->pirq = g_new0(struct pirq_info, s->nr_pirqs);
/* Set event channel functions for backend drivers to use */
xen_evtchn_ops = &emu_evtchn_backend_ops;
}
void xen_evtchn_connect_gsis(qemu_irq *system_gsis)

325
hw/i386/kvm/xen_gnttab.c
View file

@ -22,6 +22,7 @@
#include "hw/sysbus.h"
#include "hw/xen/xen.h"
#include "hw/xen/xen_backend_ops.h"
#include "xen_overlay.h"
#include "xen_gnttab.h"
@ -34,11 +35,10 @@
#define TYPE_XEN_GNTTAB "xen-gnttab"
OBJECT_DECLARE_SIMPLE_TYPE(XenGnttabState, XEN_GNTTAB)
#define XEN_PAGE_SHIFT 12
#define XEN_PAGE_SIZE (1ULL << XEN_PAGE_SHIFT)
#define ENTRIES_PER_FRAME_V1 (XEN_PAGE_SIZE / sizeof(grant_entry_v1_t))
static struct gnttab_backend_ops emu_gnttab_backend_ops;
struct XenGnttabState {
/*< private >*/
SysBusDevice busdev;
@ -57,6 +57,8 @@ struct XenGnttabState {
MemoryRegion gnt_frames;
MemoryRegion *gnt_aliases;
uint64_t *gnt_frame_gpas;
uint8_t *map_track;
};
struct XenGnttabState *xen_gnttab_singleton;
@ -70,13 +72,11 @@ static void xen_gnttab_realize(DeviceState *dev, Error **errp)
error_setg(errp, "Xen grant table support is for Xen emulation");
return;
}
s->nr_frames = 0;
s->max_frames = kvm_xen_get_gnttab_max_frames();
memory_region_init_ram(&s->gnt_frames, OBJECT(dev), "xen:grant_table",
XEN_PAGE_SIZE * s->max_frames, &error_abort);
memory_region_set_enabled(&s->gnt_frames, true);
s->entries.v1 = memory_region_get_ram_ptr(&s->gnt_frames);
memset(s->entries.v1, 0, XEN_PAGE_SIZE * s->max_frames);
/* Create individual page-sizes aliases for overlays */
s->gnt_aliases = (void *)g_new0(MemoryRegion, s->max_frames);
@ -88,9 +88,18 @@ static void xen_gnttab_realize(DeviceState *dev, Error **errp)
s->gnt_frame_gpas[i] = INVALID_GPA;
}
s->nr_frames = 0;
memset(s->entries.v1, 0, XEN_PAGE_SIZE * s->max_frames);
s->entries.v1[GNTTAB_RESERVED_XENSTORE].flags = GTF_permit_access;
s->entries.v1[GNTTAB_RESERVED_XENSTORE].frame = XEN_SPECIAL_PFN(XENSTORE);
qemu_mutex_init(&s->gnt_lock);
xen_gnttab_singleton = s;
s->map_track = g_new0(uint8_t, s->max_frames * ENTRIES_PER_FRAME_V1);
xen_gnttab_ops = &emu_gnttab_backend_ops;
}
static int xen_gnttab_post_load(void *opaque, int version_id)
@ -230,3 +239,309 @@ int xen_gnttab_query_size_op(struct gnttab_query_size *size)
size->max_nr_frames = s->max_frames;
return 0;
}
/* Track per-open refs, to allow close() to clean up. */
struct active_ref {
MemoryRegionSection mrs;
void *virtaddr;
uint32_t refcnt;
int prot;
};
static void gnt_unref(XenGnttabState *s, grant_ref_t ref,
MemoryRegionSection *mrs, int prot)
{
if (mrs && mrs->mr) {
if (prot & PROT_WRITE) {
memory_region_set_dirty(mrs->mr, mrs->offset_within_region,
XEN_PAGE_SIZE);
}
memory_region_unref(mrs->mr);
mrs->mr = NULL;
}
assert(s->map_track[ref] != 0);
if (--s->map_track[ref] == 0) {
grant_entry_v1_t *gnt_p = &s->entries.v1[ref];
qatomic_and(&gnt_p->flags, (uint16_t)~(GTF_reading | GTF_writing));
}
}
static uint64_t gnt_ref(XenGnttabState *s, grant_ref_t ref, int prot)
{
uint16_t mask = GTF_type_mask | GTF_sub_page;
grant_entry_v1_t gnt, *gnt_p;
int retries = 0;
if (ref >= s->max_frames * ENTRIES_PER_FRAME_V1 ||
s->map_track[ref] == UINT8_MAX) {
return INVALID_GPA;
}
if (prot & PROT_WRITE) {
mask |= GTF_readonly;
}
gnt_p = &s->entries.v1[ref];
/*
* The guest can legitimately be changing the GTF_readonly flag. Allow
* that, but don't let a malicious guest cause a livelock.
*/
for (retries = 0; retries < 5; retries++) {
uint16_t new_flags;
/* Read the entry before an atomic operation on its flags */
gnt = *(volatile grant_entry_v1_t *)gnt_p;
if ((gnt.flags & mask) != GTF_permit_access ||
gnt.domid != DOMID_QEMU) {
return INVALID_GPA;
}
new_flags = gnt.flags | GTF_reading;
if (prot & PROT_WRITE) {
new_flags |= GTF_writing;
}
if (qatomic_cmpxchg(&gnt_p->flags, gnt.flags, new_flags) == gnt.flags) {
return (uint64_t)gnt.frame << XEN_PAGE_SHIFT;
}
}
return INVALID_GPA;
}
struct xengntdev_handle {
GHashTable *active_maps;
};
static int xen_be_gnttab_set_max_grants(struct xengntdev_handle *xgt,
uint32_t nr_grants)
{
return 0;
}
static void *xen_be_gnttab_map_refs(struct xengntdev_handle *xgt,
uint32_t count, uint32_t domid,
uint32_t *refs, int prot)
{
XenGnttabState *s = xen_gnttab_singleton;
struct active_ref *act;
if (!s) {
errno = ENOTSUP;
return NULL;
}
if (domid != xen_domid) {
errno = EINVAL;
return NULL;
}
if (!count || count > 4096) {
errno = EINVAL;
return NULL;
}
/*
* Making a contiguous mapping from potentially discontiguous grant
* references would be... distinctly non-trivial. We don't support it.
* Even changing the API to return an array of pointers, one per page,
* wouldn't be simple to use in PV backends because some structures
* actually cross page boundaries (e.g. 32-bit blkif_response ring
* entries are 12 bytes).
*/
if (count != 1) {
errno = EINVAL;
return NULL;
}
QEMU_LOCK_GUARD(&s->gnt_lock);
act = g_hash_table_lookup(xgt->active_maps, GINT_TO_POINTER(refs[0]));
if (act) {
if ((prot & PROT_WRITE) && !(act->prot & PROT_WRITE)) {
if (gnt_ref(s, refs[0], prot) == INVALID_GPA) {
return NULL;
}
act->prot |= PROT_WRITE;
}
act->refcnt++;
} else {
uint64_t gpa = gnt_ref(s, refs[0], prot);
if (gpa == INVALID_GPA) {
errno = EINVAL;
return NULL;
}
act = g_new0(struct active_ref, 1);
act->prot = prot;
act->refcnt = 1;
act->mrs = memory_region_find(get_system_memory(), gpa, XEN_PAGE_SIZE);
if (act->mrs.mr &&
!int128_lt(act->mrs.size, int128_make64(XEN_PAGE_SIZE)) &&
memory_region_get_ram_addr(act->mrs.mr) != RAM_ADDR_INVALID) {
act->virtaddr = qemu_map_ram_ptr(act->mrs.mr->ram_block,
act->mrs.offset_within_region);
}
if (!act->virtaddr) {
gnt_unref(s, refs[0], &act->mrs, 0);
g_free(act);
errno = EINVAL;
return NULL;
}
s->map_track[refs[0]]++;
g_hash_table_insert(xgt->active_maps, GINT_TO_POINTER(refs[0]), act);
}
return act->virtaddr;
}
static gboolean do_unmap(gpointer key, gpointer value, gpointer user_data)
{
XenGnttabState *s = user_data;
grant_ref_t gref = GPOINTER_TO_INT(key);
struct active_ref *act = value;
gnt_unref(s, gref, &act->mrs, act->prot);
g_free(act);
return true;
}
static int xen_be_gnttab_unmap(struct xengntdev_handle *xgt,
void *start_address, uint32_t *refs,
uint32_t count)
{
XenGnttabState *s = xen_gnttab_singleton;
struct active_ref *act;
if (!s) {
return -ENOTSUP;
}
if (count != 1) {
return -EINVAL;
}
QEMU_LOCK_GUARD(&s->gnt_lock);
act = g_hash_table_lookup(xgt->active_maps, GINT_TO_POINTER(refs[0]));
if (!act) {
return -ENOENT;
}
if (act->virtaddr != start_address) {
return -EINVAL;
}
if (!--act->refcnt) {
do_unmap(GINT_TO_POINTER(refs[0]), act, s);
g_hash_table_remove(xgt->active_maps, GINT_TO_POINTER(refs[0]));
}
return 0;
}
/*
* This looks a bit like the one for true Xen in xen-operations.c but
* in emulation we don't support multi-page mappings. And under Xen we
* *want* the multi-page mappings so we have fewer bounces through the
* kernel and the hypervisor. So the code paths end up being similar,
* but different.
*/
static int xen_be_gnttab_copy(struct xengntdev_handle *xgt, bool to_domain,
uint32_t domid, XenGrantCopySegment *segs,
uint32_t nr_segs, Error **errp)
{
int prot = to_domain ? PROT_WRITE : PROT_READ;
unsigned int i;
for (i = 0; i < nr_segs; i++) {
XenGrantCopySegment *seg = &segs[i];
void *page;
uint32_t ref = to_domain ? seg->dest.foreign.ref :
seg->source.foreign.ref;
page = xen_be_gnttab_map_refs(xgt, 1, domid, &ref, prot);
if (!page) {
if (errp) {
error_setg_errno(errp, errno,
"xen_be_gnttab_map_refs failed");
}
return -errno;
}
if (to_domain) {
memcpy(page + seg->dest.foreign.offset, seg->source.virt,
seg->len);
} else {
memcpy(seg->dest.virt, page + seg->source.foreign.offset,
seg->len);
}
if (xen_be_gnttab_unmap(xgt, page, &ref, 1)) {
if (errp) {
error_setg_errno(errp, errno, "xen_be_gnttab_unmap failed");
}
return -errno;
}
}
return 0;
}
static struct xengntdev_handle *xen_be_gnttab_open(void)
{
struct xengntdev_handle *xgt = g_new0(struct xengntdev_handle, 1);
xgt->active_maps = g_hash_table_new(g_direct_hash, g_direct_equal);
return xgt;
}
static int xen_be_gnttab_close(struct xengntdev_handle *xgt)
{
XenGnttabState *s = xen_gnttab_singleton;
if (!s) {
return -ENOTSUP;
}
g_hash_table_foreach_remove(xgt->active_maps, do_unmap, s);
g_hash_table_destroy(xgt->active_maps);
g_free(xgt);
return 0;
}
static struct gnttab_backend_ops emu_gnttab_backend_ops = {
.open = xen_be_gnttab_open,
.close = xen_be_gnttab_close,
.grant_copy = xen_be_gnttab_copy,
.set_max_grants = xen_be_gnttab_set_max_grants,
.map_refs = xen_be_gnttab_map_refs,
.unmap = xen_be_gnttab_unmap,
};
int xen_gnttab_reset(void)
{
XenGnttabState *s = xen_gnttab_singleton;
if (!s) {
return -ENOTSUP;
}
QEMU_LOCK_GUARD(&s->gnt_lock);
s->nr_frames = 0;
memset(s->entries.v1, 0, XEN_PAGE_SIZE * s->max_frames);
s->entries.v1[GNTTAB_RESERVED_XENSTORE].flags = GTF_permit_access;
s->entries.v1[GNTTAB_RESERVED_XENSTORE].frame = XEN_SPECIAL_PFN(XENSTORE);
memset(s->map_track, 0, s->max_frames * ENTRIES_PER_FRAME_V1);
return 0;
}

1
hw/i386/kvm/xen_gnttab.h
View file

@ -13,6 +13,7 @@
#define QEMU_XEN_GNTTAB_H
void xen_gnttab_create(void);
int xen_gnttab_reset(void);
int xen_gnttab_map_page(uint64_t idx, uint64_t gfn);
struct gnttab_set_version;

1251
hw/i386/kvm/xen_xenstore.c
View file

File diff suppressed because it is too large Load diff

1927
hw/i386/kvm/xenstore_impl.c Normal file
View file

File diff suppressed because it is too large Load diff

63
hw/i386/kvm/xenstore_impl.h Normal file
View file

@ -0,0 +1,63 @@
/*
* QEMU Xen emulation: The actual implementation of XenStore
*
* Copyright © 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Authors: David Woodhouse <dwmw2@infradead.org>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef QEMU_XENSTORE_IMPL_H
#define QEMU_XENSTORE_IMPL_H
#include "hw/xen/xen_backend_ops.h"
typedef struct XenstoreImplState XenstoreImplState;
XenstoreImplState *xs_impl_create(unsigned int dom_id);
char *xs_perm_as_string(unsigned int perm, unsigned int domid);
/*
* These functions return *positive* error numbers. This is a little
* unconventional but it helps to keep us honest because there is
* also a very limited set of error numbers that they are permitted
* to return (those in xsd_errors).
*/
int xs_impl_read(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t tx_id, const char *path, GByteArray *data);
int xs_impl_write(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t tx_id, const char *path, GByteArray *data);
int xs_impl_directory(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t tx_id, const char *path,
uint64_t *gencnt, GList **items);
int xs_impl_transaction_start(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t *tx_id);
int xs_impl_transaction_end(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t tx_id, bool commit);
int xs_impl_rm(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t tx_id, const char *path);
int xs_impl_get_perms(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t tx_id, const char *path, GList **perms);
int xs_impl_set_perms(XenstoreImplState *s, unsigned int dom_id,
xs_transaction_t tx_id, const char *path, GList *perms);
/* This differs from xs_watch_fn because it has the token */
typedef void(xs_impl_watch_fn)(void *opaque, const char *path,
const char *token);
int xs_impl_watch(XenstoreImplState *s, unsigned int dom_id, const char *path,
const char *token, xs_impl_watch_fn fn, void *opaque);
int xs_impl_unwatch(XenstoreImplState *s, unsigned int dom_id,
const char *path, const char *token, xs_impl_watch_fn fn,
void *opaque);
int xs_impl_reset_watches(XenstoreImplState *s, unsigned int dom_id);
GByteArray *xs_impl_serialize(XenstoreImplState *s);
int xs_impl_deserialize(XenstoreImplState *s, GByteArray *bytes,
unsigned int dom_id, xs_impl_watch_fn watch_fn,
void *watch_opaque);
#endif /* QEMU_XENSTORE_IMPL_H */

7
hw/i386/pc.c
View file

@ -102,6 +102,11 @@
#include "trace.h"
#include CONFIG_DEVICES
#ifdef CONFIG_XEN_EMU
#include "hw/xen/xen-legacy-backend.h"
#include "hw/xen/xen-bus.h"
#endif
/*
* Helper for setting model-id for CPU models that changed model-id
* depending on QEMU versions up to QEMU 2.4.
@ -1318,6 +1323,8 @@ void pc_basic_device_init(struct PCMachineState *pcms,
if (pcms->bus) {
pci_create_simple(pcms->bus, -1, "xen-platform");
}
xen_bus_init();
xen_be_init();
}
#endif

4
hw/i386/pc_piix.c
View file

@ -47,8 +47,6 @@
#include "hw/kvm/clock.h"
#include "hw/sysbus.h"
#include "hw/i2c/smbus_eeprom.h"
#include "hw/xen/xen-x86.h"
#include "hw/xen/xen.h"
#include "exec/memory.h"
#include "hw/acpi/acpi.h"
#include "hw/acpi/piix4.h"
@ -60,6 +58,8 @@
#include <xen/hvm/hvm_info_table.h>
#include "hw/xen/xen_pt.h"
#endif
#include "hw/xen/xen-x86.h"
#include "hw/xen/xen.h"
#include "migration/global_state.h"
#include "migration/misc.h"
#include "sysemu/numa.h"

38
hw/i386/xen/xen-hvm.c
View file

@ -18,7 +18,7 @@
#include "hw/irq.h"
#include "hw/hw.h"
#include "hw/i386/apic-msidef.h"
#include "hw/xen/xen_common.h"
#include "hw/xen/xen_native.h"
#include "hw/xen/xen-legacy-backend.h"
#include "hw/xen/xen-bus.h"
#include "hw/xen/xen-x86.h"
@ -52,10 +52,11 @@ static bool xen_in_migration;
/* Compatibility with older version */
/* This allows QEMU to build on a system that has Xen 4.5 or earlier
* installed. This here (not in hw/xen/xen_common.h) because xen/hvm/ioreq.h
* needs to be included before this block and hw/xen/xen_common.h needs to
* be included before xen/hvm/ioreq.h
/*
* This allows QEMU to build on a system that has Xen 4.5 or earlier installed.
* This is here (not in hw/xen/xen_native.h) because xen/hvm/ioreq.h needs to
* be included before this block and hw/xen/xen_native.h needs to be included
* before xen/hvm/ioreq.h
*/
#ifndef IOREQ_TYPE_VMWARE_PORT
#define IOREQ_TYPE_VMWARE_PORT 3
@ -761,7 +762,7 @@ static ioreq_t *cpu_get_ioreq(XenIOState *state)
int i;
evtchn_port_t port;
port = xenevtchn_pending(state->xce_handle);
port = qemu_xen_evtchn_pending(state->xce_handle);
if (port == state->bufioreq_local_port) {
timer_mod(state->buffered_io_timer,
BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
@ -780,7 +781,7 @@ static ioreq_t *cpu_get_ioreq(XenIOState *state)
}
/* unmask the wanted port again */
xenevtchn_unmask(state->xce_handle, port);
qemu_xen_evtchn_unmask(state->xce_handle, port);
/* get the io packet from shared memory */
state->send_vcpu = i;
@ -1147,7 +1148,7 @@ static void handle_buffered_io(void *opaque)
BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
} else {
timer_del(state->buffered_io_timer);
xenevtchn_unmask(state->xce_handle, state->bufioreq_local_port);
qemu_xen_evtchn_unmask(state->xce_handle, state->bufioreq_local_port);
}
}
@ -1196,8 +1197,8 @@ static void cpu_handle_ioreq(void *opaque)
}
req->state = STATE_IORESP_READY;
xenevtchn_notify(state->xce_handle,
state->ioreq_local_port[state->send_vcpu]);
qemu_xen_evtchn_notify(state->xce_handle,
state->ioreq_local_port[state->send_vcpu]);
}
}
@ -1206,7 +1207,7 @@ static void xen_main_loop_prepare(XenIOState *state)
int evtchn_fd = -1;
if (state->xce_handle != NULL) {
evtchn_fd = xenevtchn_fd(state->xce_handle);
evtchn_fd = qemu_xen_evtchn_fd(state->xce_handle);
}
state->buffered_io_timer = timer_new_ms(QEMU_CLOCK_REALTIME, handle_buffered_io,
@ -1249,7 +1250,7 @@ static void xen_exit_notifier(Notifier *n, void *data)
xenforeignmemory_unmap_resource(xen_fmem, state->fres);
}
xenevtchn_close(state->xce_handle);
qemu_xen_evtchn_close(state->xce_handle);
xs_daemon_close(state->xenstore);
}
@ -1397,9 +1398,11 @@ void xen_hvm_init_pc(PCMachineState *pcms, MemoryRegion **ram_memory)
xen_pfn_t ioreq_pfn;
XenIOState *state;
setup_xen_backend_ops();
state = g_new0(XenIOState, 1);
state->xce_handle = xenevtchn_open(NULL, 0);
state->xce_handle = qemu_xen_evtchn_open();
if (state->xce_handle == NULL) {
perror("xen: event channel open");
goto err;
@ -1463,8 +1466,9 @@ void xen_hvm_init_pc(PCMachineState *pcms, MemoryRegion **ram_memory)
/* FIXME: how about if we overflow the page here? */
for (i = 0; i < max_cpus; i++) {
rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid,
xen_vcpu_eport(state->shared_page, i));
rc = qemu_xen_evtchn_bind_interdomain(state->xce_handle, xen_domid,
xen_vcpu_eport(state->shared_page,
i));
if (rc == -1) {
error_report("shared evtchn %d bind error %d", i, errno);
goto err;
@ -1472,8 +1476,8 @@ void xen_hvm_init_pc(PCMachineState *pcms, MemoryRegion **ram_memory)
state->ioreq_local_port[i] = rc;
}
rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid,
state->bufioreq_remote_port);
rc = qemu_xen_evtchn_bind_interdomain(state->xce_handle, xen_domid,
state->bufioreq_remote_port);
if (rc == -1) {
error_report("buffered evtchn bind error %d", errno);
goto err;

2
hw/i386/xen/xen-mapcache.c
View file

@ -14,7 +14,7 @@
#include <sys/resource.h>
#include "hw/xen/xen-legacy-backend.h"
#include "hw/xen/xen_native.h"
#include "qemu/bitmap.h"
#include "sysemu/runstate.h"

7
hw/i386/xen/xen_platform.c
View file

@ -28,7 +28,6 @@
#include "hw/ide/pci.h"
#include "hw/pci/pci.h"
#include "migration/vmstate.h"
#include "hw/xen/xen.h"
#include "net/net.h"
#include "trace.h"
#include "sysemu/xen.h"
@ -38,10 +37,12 @@
#include "qom/object.h"
#ifdef CONFIG_XEN
#include "hw/xen/xen_common.h"
#include "hw/xen/xen-legacy-backend.h"
#include "hw/xen/xen_native.h"
#endif
/* The rule is that xen_native.h must come first */
#include "hw/xen/xen.h"
//#define DEBUG_PLATFORM
#ifdef DEBUG_PLATFORM

25
hw/net/xen_nic.c
View file

@ -145,7 +145,7 @@ static void net_tx_packets(struct XenNetDev *netdev)
continue;
}
if ((txreq.offset + txreq.size) > XC_PAGE_SIZE) {
if ((txreq.offset + txreq.size) > XEN_PAGE_SIZE) {
xen_pv_printf(&netdev->xendev, 0, "error: page crossing\n");
net_tx_error(netdev, &txreq, rc);
continue;
@ -171,7 +171,7 @@ static void net_tx_packets(struct XenNetDev *netdev)
if (txreq.flags & NETTXF_csum_blank) {
/* have read-only mapping -> can't fill checksum in-place */
if (!tmpbuf) {
tmpbuf = g_malloc(XC_PAGE_SIZE);
tmpbuf = g_malloc(XEN_PAGE_SIZE);
}
memcpy(tmpbuf, page + txreq.offset, txreq.size);
net_checksum_calculate(tmpbuf, txreq.size, CSUM_ALL);
@ -181,7 +181,7 @@ static void net_tx_packets(struct XenNetDev *netdev)
qemu_send_packet(qemu_get_queue(netdev->nic),
page + txreq.offset, txreq.size);
}
xen_be_unmap_grant_ref(&netdev->xendev, page);
xen_be_unmap_grant_ref(&netdev->xendev, page, txreq.gref);
net_tx_response(netdev, &txreq, NETIF_RSP_OKAY);
}
if (!netdev->tx_work) {
@ -243,9 +243,9 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t size
if (rc == rp || RING_REQUEST_CONS_OVERFLOW(&netdev->rx_ring, rc)) {
return 0;
}
if (size > XC_PAGE_SIZE - NET_IP_ALIGN) {
if (size > XEN_PAGE_SIZE - NET_IP_ALIGN) {
xen_pv_printf(&netdev->xendev, 0, "packet too big (%lu > %ld)",
(unsigned long)size, XC_PAGE_SIZE - NET_IP_ALIGN);
(unsigned long)size, XEN_PAGE_SIZE - NET_IP_ALIGN);
return -1;
}
@ -261,7 +261,7 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t size
return -1;
}
memcpy(page + NET_IP_ALIGN, buf, size);
xen_be_unmap_grant_ref(&netdev->xendev, page);
xen_be_unmap_grant_ref(&netdev->xendev, page, rxreq.gref);
net_rx_response(netdev, &rxreq, NETIF_RSP_OKAY, NET_IP_ALIGN, size, 0);
return size;
@ -343,12 +343,13 @@ static int net_connect(struct XenLegacyDevice *xendev)
netdev->rx_ring_ref,
PROT_READ | PROT_WRITE);
if (!netdev->rxs) {
xen_be_unmap_grant_ref(&netdev->xendev, netdev->txs);
xen_be_unmap_grant_ref(&netdev->xendev, netdev->txs,
netdev->tx_ring_ref);
netdev->txs = NULL;
return -1;
}
BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XC_PAGE_SIZE);
BACK_RING_INIT(&netdev->rx_ring, netdev->rxs, XC_PAGE_SIZE);
BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XEN_PAGE_SIZE);
BACK_RING_INIT(&netdev->rx_ring, netdev->rxs, XEN_PAGE_SIZE);
xen_be_bind_evtchn(&netdev->xendev);
@ -368,11 +369,13 @@ static void net_disconnect(struct XenLegacyDevice *xendev)
xen_pv_unbind_evtchn(&netdev->xendev);
if (netdev->txs) {
xen_be_unmap_grant_ref(&netdev->xendev, netdev->txs);
xen_be_unmap_grant_ref(&netdev->xendev, netdev->txs,
netdev->tx_ring_ref);
netdev->txs = NULL;
}
if (netdev->rxs) {
xen_be_unmap_grant_ref(&netdev->xendev, netdev->rxs);
xen_be_unmap_grant_ref(&netdev->xendev, netdev->rxs,
netdev->rx_ring_ref);
netdev->rxs = NULL;
}
}

2
hw/usb/meson.build
View file

@ -84,6 +84,6 @@ if libusb.found()
hw_usb_modules += {'host': usbhost_ss}
endif
softmmu_ss.add(when: ['CONFIG_USB', 'CONFIG_XEN', libusb], if_true: files('xen-usb.c'))
softmmu_ss.add(when: ['CONFIG_USB', 'CONFIG_XEN_BUS', libusb], if_true: files('xen-usb.c'))
modules += { 'hw-usb': hw_usb_modules }

29
hw/usb/xen-usb.c
View file

@ -101,6 +101,8 @@ struct usbback_hotplug {
struct usbback_info {
struct XenLegacyDevice xendev; /* must be first */
USBBus bus;
uint32_t urb_ring_ref;
uint32_t conn_ring_ref;
void *urb_sring;
void *conn_sring;
struct usbif_urb_back_ring urb_ring;
@ -159,7 +161,7 @@ static int usbback_gnttab_map(struct usbback_req *usbback_req)
for (i = 0; i < nr_segs; i++) {
if ((unsigned)usbback_req->req.seg[i].offset +
(unsigned)usbback_req->req.seg[i].length > XC_PAGE_SIZE) {
(unsigned)usbback_req->req.seg[i].length > XEN_PAGE_SIZE) {
xen_pv_printf(xendev, 0, "segment crosses page boundary\n");
return -EINVAL;
}
@ -183,7 +185,7 @@ static int usbback_gnttab_map(struct usbback_req *usbback_req)
for (i = 0; i < usbback_req->nr_buffer_segs; i++) {
seg = usbback_req->req.seg + i;
addr = usbback_req->buffer + i * XC_PAGE_SIZE + seg->offset;
addr = usbback_req->buffer + i * XEN_PAGE_SIZE + seg->offset;
qemu_iovec_add(&usbback_req->packet.iov, addr, seg->length);
}
}
@ -277,10 +279,11 @@ static int usbback_init_packet(struct usbback_req *usbback_req)
static void usbback_do_response(struct usbback_req *usbback_req, int32_t status,
int32_t actual_length, int32_t error_count)
{
uint32_t ref[USBIF_MAX_SEGMENTS_PER_REQUEST];
struct usbback_info *usbif;
struct usbif_urb_response *res;
struct XenLegacyDevice *xendev;
unsigned int notify;
unsigned int notify, i;
usbif = usbback_req->usbif;
xendev = &usbif->xendev;
@ -293,13 +296,19 @@ static void usbback_do_response(struct usbback_req *usbback_req, int32_t status,
}
if (usbback_req->buffer) {
xen_be_unmap_grant_refs(xendev, usbback_req->buffer,
for (i = 0; i < usbback_req->nr_buffer_segs; i++) {
ref[i] = usbback_req->req.seg[i].gref;
}
xen_be_unmap_grant_refs(xendev, usbback_req->buffer, ref,
usbback_req->nr_buffer_segs);
usbback_req->buffer = NULL;
}
if (usbback_req->isoc_buffer) {
xen_be_unmap_grant_refs(xendev, usbback_req->isoc_buffer,
for (i = 0; i < usbback_req->nr_extra_segs; i++) {
ref[i] = usbback_req->req.seg[i + usbback_req->req.nr_buffer_segs].gref;
}
xen_be_unmap_grant_refs(xendev, usbback_req->isoc_buffer, ref,
usbback_req->nr_extra_segs);
usbback_req->isoc_buffer = NULL;
}
@ -832,11 +841,11 @@ static void usbback_disconnect(struct XenLegacyDevice *xendev)
xen_pv_unbind_evtchn(xendev);
if (usbif->urb_sring) {
xen_be_unmap_grant_ref(xendev, usbif->urb_sring);
xen_be_unmap_grant_ref(xendev, usbif->urb_sring, usbif->urb_ring_ref);
usbif->urb_sring = NULL;
}
if (usbif->conn_sring) {
xen_be_unmap_grant_ref(xendev, usbif->conn_sring);
xen_be_unmap_grant_ref(xendev, usbif->conn_sring, usbif->conn_ring_ref);
usbif->conn_sring = NULL;
}
@ -889,10 +898,12 @@ static int usbback_connect(struct XenLegacyDevice *xendev)
return -1;
}
usbif->urb_ring_ref = urb_ring_ref;
usbif->conn_ring_ref = conn_ring_ref;
urb_sring = usbif->urb_sring;
conn_sring = usbif->conn_sring;
BACK_RING_INIT(&usbif->urb_ring, urb_sring, XC_PAGE_SIZE);
BACK_RING_INIT(&usbif->conn_ring, conn_sring, XC_PAGE_SIZE);
BACK_RING_INIT(&usbif->urb_ring, urb_sring, XEN_PAGE_SIZE);
BACK_RING_INIT(&usbif->conn_ring, conn_sring, XEN_PAGE_SIZE);
xen_be_bind_evtchn(xendev);

6
hw/xen/meson.build
View file

@ -1,4 +1,4 @@
softmmu_ss.add(when: ['CONFIG_XEN', xen], if_true: files(
softmmu_ss.add(when: ['CONFIG_XEN_BUS'], if_true: files(
'xen-backend.c',
'xen-bus-helper.c',
'xen-bus.c',
@ -7,6 +7,10 @@ softmmu_ss.add(when: ['CONFIG_XEN', xen], if_true: files(
'xen_pvdev.c',
))
softmmu_ss.add(when: ['CONFIG_XEN', xen], if_true: files(
'xen-operations.c',
))
xen_specific_ss = ss.source_set()
if have_xen_pci_passthrough
xen_specific_ss.add(files(

2
hw/xen/trace-events
View file

@ -1,6 +1,6 @@
# See docs/devel/tracing.rst for syntax documentation.
# ../../include/hw/xen/xen_common.h
# ../../include/hw/xen/xen_native.h
xen_default_ioreq_server(void) ""
xen_ioreq_server_create(uint32_t id) "id: %u"
xen_ioreq_server_destroy(uint32_t id) "id: %u"

62
hw/xen/xen-bus-helper.c
View file

@ -10,6 +10,7 @@
#include "hw/xen/xen-bus.h"
#include "hw/xen/xen-bus-helper.h"
#include "qapi/error.h"
#include "trace.h"
#include <glib/gprintf.h>
@ -46,34 +47,28 @@ const char *xs_strstate(enum xenbus_state state)
return "INVALID";
}
void xs_node_create(struct xs_handle *xsh, xs_transaction_t tid,
const char *node, struct xs_permissions perms[],
unsigned int nr_perms, Error **errp)
void xs_node_create(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, unsigned int owner, unsigned int domid,
unsigned int perms, Error **errp)
{
trace_xs_node_create(node);
if (!xs_write(xsh, tid, node, "", 0)) {
if (!qemu_xen_xs_create(h, tid, owner, domid, perms, node)) {
error_setg_errno(errp, errno, "failed to create node '%s'", node);
return;
}
if (!xs_set_permissions(xsh, tid, node, perms, nr_perms)) {
error_setg_errno(errp, errno, "failed to set node '%s' permissions",
node);
}
}
void xs_node_destroy(struct xs_handle *xsh, xs_transaction_t tid,
void xs_node_destroy(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, Error **errp)
{
trace_xs_node_destroy(node);
if (!xs_rm(xsh, tid, node)) {
if (!qemu_xen_xs_destroy(h, tid, node)) {
error_setg_errno(errp, errno, "failed to destroy node '%s'", node);
}
}
void xs_node_vprintf(struct xs_handle *xsh, xs_transaction_t tid,
void xs_node_vprintf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
{
@ -86,7 +81,7 @@ void xs_node_vprintf(struct xs_handle *xsh, xs_transaction_t tid,
trace_xs_node_vprintf(path, value);
if (!xs_write(xsh, tid, path, value, len)) {
if (!qemu_xen_xs_write(h, tid, path, value, len)) {
error_setg_errno(errp, errno, "failed to write '%s' to '%s'",
value, path);
}
@ -95,18 +90,18 @@ void xs_node_vprintf(struct xs_handle *xsh, xs_transaction_t tid,
g_free(path);
}
void xs_node_printf(struct xs_handle *xsh, xs_transaction_t tid,
void xs_node_printf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
xs_node_vprintf(xsh, tid, node, key, errp, fmt, ap);
xs_node_vprintf(h, tid, node, key, errp, fmt, ap);
va_end(ap);
}
int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t tid,
int xs_node_vscanf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
{
@ -115,7 +110,7 @@ int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t tid,
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
value = xs_read(xsh, tid, path, NULL);
value = qemu_xen_xs_read(h, tid, path, NULL);
trace_xs_node_vscanf(path, value);
@ -133,7 +128,7 @@ int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t tid,
return rc;
}
int xs_node_scanf(struct xs_handle *xsh, xs_transaction_t tid,
int xs_node_scanf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
{
@ -141,42 +136,35 @@ int xs_node_scanf(struct xs_handle *xsh, xs_transaction_t tid,
int rc;
va_start(ap, fmt);
rc = xs_node_vscanf(xsh, tid, node, key, errp, fmt, ap);
rc = xs_node_vscanf(h, tid, node, key, errp, fmt, ap);
va_end(ap);
return rc;
}
void xs_node_watch(struct xs_handle *xsh, const char *node, const char *key,
char *token, Error **errp)
struct qemu_xs_watch *xs_node_watch(struct qemu_xs_handle *h, const char *node,
const char *key, xs_watch_fn fn,
void *opaque, Error **errp)
{
char *path;
struct qemu_xs_watch *w;
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
trace_xs_node_watch(path);
if (!xs_watch(xsh, path, token)) {
w = qemu_xen_xs_watch(h, path, fn, opaque);
if (!w) {
error_setg_errno(errp, errno, "failed to watch node '%s'", path);
}
g_free(path);
return w;
}
void xs_node_unwatch(struct xs_handle *xsh, const char *node,
const char *key, const char *token, Error **errp)
void xs_node_unwatch(struct qemu_xs_handle *h, struct qemu_xs_watch *w)
{
char *path;
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
trace_xs_node_unwatch(path);
if (!xs_unwatch(xsh, path, token)) {
error_setg_errno(errp, errno, "failed to unwatch node '%s'", path);
}
g_free(path);
qemu_xen_xs_unwatch(h, w);
}

411
hw/xen/xen-bus.c
View file

@ -62,7 +62,7 @@ static void xen_device_unplug(XenDevice *xendev, Error **errp)
/* Mimic the way the Xen toolstack does an unplug */
again:
tid = xs_transaction_start(xenbus->xsh);
tid = qemu_xen_xs_transaction_start(xenbus->xsh);
if (tid == XBT_NULL) {
error_setg_errno(errp, errno, "failed xs_transaction_start");
return;
@ -80,7 +80,7 @@ again:
goto abort;
}
if (!xs_transaction_end(xenbus->xsh, tid, false)) {
if (!qemu_xen_xs_transaction_end(xenbus->xsh, tid, false)) {
if (errno == EAGAIN) {
goto again;
}
@ -95,7 +95,7 @@ abort:
* We only abort if there is already a failure so ignore any error
* from ending the transaction.
*/
xs_transaction_end(xenbus->xsh, tid, true);
qemu_xen_xs_transaction_end(xenbus->xsh, tid, true);
}
static void xen_bus_print_dev(Monitor *mon, DeviceState *dev, int indent)
@ -111,143 +111,6 @@ static char *xen_bus_get_dev_path(DeviceState *dev)
return xen_device_get_backend_path(XEN_DEVICE(dev));
}
struct XenWatch {
char *node, *key;
char *token;
XenWatchHandler handler;
void *opaque;
Notifier notifier;
};
static void watch_notify(Notifier *n, void *data)
{
XenWatch *watch = container_of(n, XenWatch, notifier);
const char *token = data;
if (!strcmp(watch->token, token)) {
watch->handler(watch->opaque);
}
}
static XenWatch *new_watch(const char *node, const char *key,
XenWatchHandler handler, void *opaque)
{
XenWatch *watch = g_new0(XenWatch, 1);
QemuUUID uuid;
qemu_uuid_generate(&uuid);
watch->token = qemu_uuid_unparse_strdup(&uuid);
watch->node = g_strdup(node);
watch->key = g_strdup(key);
watch->handler = handler;
watch->opaque = opaque;
watch->notifier.notify = watch_notify;
return watch;
}
static void free_watch(XenWatch *watch)
{
g_free(watch->token);
g_free(watch->key);
g_free(watch->node);
g_free(watch);
}
struct XenWatchList {
struct xs_handle *xsh;
NotifierList notifiers;
};
static void watch_list_event(void *opaque)
{
XenWatchList *watch_list = opaque;
char **v;
const char *token;
v = xs_check_watch(watch_list->xsh);
if (!v) {
return;
}
token = v[XS_WATCH_TOKEN];
notifier_list_notify(&watch_list->notifiers, (void *)token);
free(v);
}
static XenWatchList *watch_list_create(struct xs_handle *xsh)
{
XenWatchList *watch_list = g_new0(XenWatchList, 1);
g_assert(xsh);
watch_list->xsh = xsh;
notifier_list_init(&watch_list->notifiers);
qemu_set_fd_handler(xs_fileno(watch_list->xsh), watch_list_event, NULL,
watch_list);
return watch_list;
}
static void watch_list_destroy(XenWatchList *watch_list)
{
g_assert(notifier_list_empty(&watch_list->notifiers));
qemu_set_fd_handler(xs_fileno(watch_list->xsh), NULL, NULL, NULL);
g_free(watch_list);
}
static XenWatch *watch_list_add(XenWatchList *watch_list, const char *node,
const char *key, XenWatchHandler handler,
void *opaque, Error **errp)
{
ERRP_GUARD();
XenWatch *watch = new_watch(node, key, handler, opaque);
notifier_list_add(&watch_list->notifiers, &watch->notifier);
xs_node_watch(watch_list->xsh, node, key, watch->token, errp);
if (*errp) {
notifier_remove(&watch->notifier);
free_watch(watch);
return NULL;
}
return watch;
}
static void watch_list_remove(XenWatchList *watch_list, XenWatch *watch,
Error **errp)
{
xs_node_unwatch(watch_list->xsh, watch->node, watch->key, watch->token,
errp);
notifier_remove(&watch->notifier);
free_watch(watch);
}
static XenWatch *xen_bus_add_watch(XenBus *xenbus, const char *node,
const char *key, XenWatchHandler handler,
Error **errp)
{
trace_xen_bus_add_watch(node, key);
return watch_list_add(xenbus->watch_list, node, key, handler, xenbus,
errp);
}
static void xen_bus_remove_watch(XenBus *xenbus, XenWatch *watch,
Error **errp)
{
trace_xen_bus_remove_watch(watch->node, watch->key);
watch_list_remove(xenbus->watch_list, watch, errp);
}
static void xen_bus_backend_create(XenBus *xenbus, const char *type,
const char *name, char *path,
Error **errp)
@ -261,15 +124,15 @@ static void xen_bus_backend_create(XenBus *xenbus, const char *type,
trace_xen_bus_backend_create(type, path);
again:
tid = xs_transaction_start(xenbus->xsh);
tid = qemu_xen_xs_transaction_start(xenbus->xsh);
if (tid == XBT_NULL) {
error_setg(errp, "failed xs_transaction_start");
return;
}
key = xs_directory(xenbus->xsh, tid, path, &n);
key = qemu_xen_xs_directory(xenbus->xsh, tid, path, &n);
if (!key) {
if (!xs_transaction_end(xenbus->xsh, tid, true)) {
if (!qemu_xen_xs_transaction_end(xenbus->xsh, tid, true)) {
error_setg_errno(errp, errno, "failed xs_transaction_end");
}
return;
@ -300,7 +163,7 @@ again:
free(key);
if (!xs_transaction_end(xenbus->xsh, tid, false)) {
if (!qemu_xen_xs_transaction_end(xenbus->xsh, tid, false)) {
qobject_unref(opts);
if (errno == EAGAIN) {
@ -327,7 +190,7 @@ static void xen_bus_type_enumerate(XenBus *xenbus, const char *type)
trace_xen_bus_type_enumerate(type);
backend = xs_directory(xenbus->xsh, XBT_NULL, domain_path, &n);
backend = qemu_xen_xs_directory(xenbus->xsh, XBT_NULL, domain_path, &n);
if (!backend) {
goto out;
}
@ -372,7 +235,7 @@ static void xen_bus_enumerate(XenBus *xenbus)
trace_xen_bus_enumerate();
type = xs_directory(xenbus->xsh, XBT_NULL, "backend", &n);
type = qemu_xen_xs_directory(xenbus->xsh, XBT_NULL, "backend", &n);
if (!type) {
return;
}
@ -415,7 +278,7 @@ static void xen_bus_cleanup(XenBus *xenbus)
}
}
static void xen_bus_backend_changed(void *opaque)
static void xen_bus_backend_changed(void *opaque, const char *path)
{
XenBus *xenbus = opaque;
@ -434,7 +297,7 @@ static void xen_bus_unrealize(BusState *bus)
for (i = 0; i < xenbus->backend_types; i++) {
if (xenbus->backend_watch[i]) {
xen_bus_remove_watch(xenbus, xenbus->backend_watch[i], NULL);
xs_node_unwatch(xenbus->xsh, xenbus->backend_watch[i]);
}
}
@ -442,13 +305,8 @@ static void xen_bus_unrealize(BusState *bus)
xenbus->backend_watch = NULL;
}
if (xenbus->watch_list) {
watch_list_destroy(xenbus->watch_list);
xenbus->watch_list = NULL;
}
if (xenbus->xsh) {
xs_close(xenbus->xsh);
qemu_xen_xs_close(xenbus->xsh);
}
}
@ -463,7 +321,7 @@ static void xen_bus_realize(BusState *bus, Error **errp)
trace_xen_bus_realize();
xenbus->xsh = xs_open(0);
xenbus->xsh = qemu_xen_xs_open();
if (!xenbus->xsh) {
error_setg_errno(errp, errno, "failed xs_open");
goto fail;
@ -476,19 +334,18 @@ static void xen_bus_realize(BusState *bus, Error **errp)
xenbus->backend_id = 0; /* Assume lack of node means dom0 */
}
xenbus->watch_list = watch_list_create(xenbus->xsh);
module_call_init(MODULE_INIT_XEN_BACKEND);
type = xen_backend_get_types(&xenbus->backend_types);
xenbus->backend_watch = g_new(XenWatch *, xenbus->backend_types);
xenbus->backend_watch = g_new(struct qemu_xs_watch *,
xenbus->backend_types);
for (i = 0; i < xenbus->backend_types; i++) {
char *node = g_strdup_printf("backend/%s", type[i]);
xenbus->backend_watch[i] =
xen_bus_add_watch(xenbus, node, key, xen_bus_backend_changed,
&local_err);
xs_node_watch(xenbus->xsh, node, key, xen_bus_backend_changed,
xenbus, &local_err);
if (local_err) {
/* This need not be treated as a hard error so don't propagate */
error_reportf_err(local_err,
@ -631,7 +488,7 @@ static bool xen_device_frontend_is_active(XenDevice *xendev)
}
}
static void xen_device_backend_changed(void *opaque)
static void xen_device_backend_changed(void *opaque, const char *path)
{
XenDevice *xendev = opaque;
const char *type = object_get_typename(OBJECT(xendev));
@ -685,66 +542,35 @@ static void xen_device_backend_changed(void *opaque)
}
}
static XenWatch *xen_device_add_watch(XenDevice *xendev, const char *node,
const char *key,
XenWatchHandler handler,
Error **errp)
{
const char *type = object_get_typename(OBJECT(xendev));
trace_xen_device_add_watch(type, xendev->name, node, key);
return watch_list_add(xendev->watch_list, node, key, handler, xendev,
errp);
}
static void xen_device_remove_watch(XenDevice *xendev, XenWatch *watch,
Error **errp)
{
const char *type = object_get_typename(OBJECT(xendev));
trace_xen_device_remove_watch(type, xendev->name, watch->node,
watch->key);
watch_list_remove(xendev->watch_list, watch, errp);
}
static void xen_device_backend_create(XenDevice *xendev, Error **errp)
{
ERRP_GUARD();
XenBus *xenbus = XEN_BUS(qdev_get_parent_bus(DEVICE(xendev)));
struct xs_permissions perms[2];
xendev->backend_path = xen_device_get_backend_path(xendev);
perms[0].id = xenbus->backend_id;
perms[0].perms = XS_PERM_NONE;
perms[1].id = xendev->frontend_id;
perms[1].perms = XS_PERM_READ;
g_assert(xenbus->xsh);
xs_node_create(xenbus->xsh, XBT_NULL, xendev->backend_path, perms,
ARRAY_SIZE(perms), errp);
xs_node_create(xenbus->xsh, XBT_NULL, xendev->backend_path,
xenbus->backend_id, xendev->frontend_id, XS_PERM_READ, errp);
if (*errp) {
error_prepend(errp, "failed to create backend: ");
return;
}
xendev->backend_state_watch =
xen_device_add_watch(xendev, xendev->backend_path,
"state", xen_device_backend_changed,
errp);
xs_node_watch(xendev->xsh, xendev->backend_path,
"state", xen_device_backend_changed, xendev,
errp);
if (*errp) {
error_prepend(errp, "failed to watch backend state: ");
return;
}
xendev->backend_online_watch =
xen_device_add_watch(xendev, xendev->backend_path,
"online", xen_device_backend_changed,
errp);
xs_node_watch(xendev->xsh, xendev->backend_path,
"online", xen_device_backend_changed, xendev,
errp);
if (*errp) {
error_prepend(errp, "failed to watch backend online: ");
return;
@ -757,12 +583,12 @@ static void xen_device_backend_destroy(XenDevice *xendev)
Error *local_err = NULL;
if (xendev->backend_online_watch) {
xen_device_remove_watch(xendev, xendev->backend_online_watch, NULL);
xs_node_unwatch(xendev->xsh, xendev->backend_online_watch);
xendev->backend_online_watch = NULL;
}
if (xendev->backend_state_watch) {
xen_device_remove_watch(xendev, xendev->backend_state_watch, NULL);
xs_node_unwatch(xendev->xsh, xendev->backend_state_watch);
xendev->backend_state_watch = NULL;
}
@ -837,7 +663,7 @@ static void xen_device_frontend_set_state(XenDevice *xendev,
}
}
static void xen_device_frontend_changed(void *opaque)
static void xen_device_frontend_changed(void *opaque, const char *path)
{
XenDevice *xendev = opaque;
XenDeviceClass *xendev_class = XEN_DEVICE_GET_CLASS(xendev);
@ -885,7 +711,6 @@ static void xen_device_frontend_create(XenDevice *xendev, Error **errp)
{
ERRP_GUARD();
XenBus *xenbus = XEN_BUS(qdev_get_parent_bus(DEVICE(xendev)));
struct xs_permissions perms[2];
xendev->frontend_path = xen_device_get_frontend_path(xendev);
@ -894,15 +719,11 @@ static void xen_device_frontend_create(XenDevice *xendev, Error **errp)
* toolstack.
*/
if (!xen_device_frontend_exists(xendev)) {
perms[0].id = xendev->frontend_id;
perms[0].perms = XS_PERM_NONE;
perms[1].id = xenbus->backend_id;
perms[1].perms = XS_PERM_READ | XS_PERM_WRITE;
g_assert(xenbus->xsh);
xs_node_create(xenbus->xsh, XBT_NULL, xendev->frontend_path, perms,
ARRAY_SIZE(perms), errp);
xs_node_create(xenbus->xsh, XBT_NULL, xendev->frontend_path,
xendev->frontend_id, xenbus->backend_id,
XS_PERM_READ | XS_PERM_WRITE, errp);
if (*errp) {
error_prepend(errp, "failed to create frontend: ");
return;
@ -910,8 +731,8 @@ static void xen_device_frontend_create(XenDevice *xendev, Error **errp)
}
xendev->frontend_state_watch =
xen_device_add_watch(xendev, xendev->frontend_path, "state",
xen_device_frontend_changed, errp);
xs_node_watch(xendev->xsh, xendev->frontend_path, "state",
xen_device_frontend_changed, xendev, errp);
if (*errp) {
error_prepend(errp, "failed to watch frontend state: ");
}
@ -923,8 +744,7 @@ static void xen_device_frontend_destroy(XenDevice *xendev)
Error *local_err = NULL;
if (xendev->frontend_state_watch) {
xen_device_remove_watch(xendev, xendev->frontend_state_watch,
NULL);
xs_node_unwatch(xendev->xsh, xendev->frontend_state_watch);
xendev->frontend_state_watch = NULL;
}
@ -947,7 +767,7 @@ static void xen_device_frontend_destroy(XenDevice *xendev)
void xen_device_set_max_grant_refs(XenDevice *xendev, unsigned int nr_refs,
Error **errp)
{
if (xengnttab_set_max_grants(xendev->xgth, nr_refs)) {
if (qemu_xen_gnttab_set_max_grants(xendev->xgth, nr_refs)) {
error_setg_errno(errp, errno, "xengnttab_set_max_grants failed");
}
}
@ -956,9 +776,8 @@ void *xen_device_map_grant_refs(XenDevice *xendev, uint32_t *refs,
unsigned int nr_refs, int prot,
Error **errp)
{
void *map = xengnttab_map_domain_grant_refs(xendev->xgth, nr_refs,
xendev->frontend_id, refs,
prot);
void *map = qemu_xen_gnttab_map_refs(xendev->xgth, nr_refs,
xendev->frontend_id, refs, prot);
if (!map) {
error_setg_errno(errp, errno,
@ -968,112 +787,20 @@ void *xen_device_map_grant_refs(XenDevice *xendev, uint32_t *refs,
return map;
}
void xen_device_unmap_grant_refs(XenDevice *xendev, void *map,
void xen_device_unmap_grant_refs(XenDevice *xendev, void *map, uint32_t *refs,
unsigned int nr_refs, Error **errp)
{
if (xengnttab_unmap(xendev->xgth, map, nr_refs)) {
if (qemu_xen_gnttab_unmap(xendev->xgth, map, refs, nr_refs)) {
error_setg_errno(errp, errno, "xengnttab_unmap failed");
}
}
static void compat_copy_grant_refs(XenDevice *xendev, bool to_domain,
XenDeviceGrantCopySegment segs[],
unsigned int nr_segs, Error **errp)
{
uint32_t *refs = g_new(uint32_t, nr_segs);
int prot = to_domain ? PROT_WRITE : PROT_READ;
void *map;
unsigned int i;
for (i = 0; i < nr_segs; i++) {
XenDeviceGrantCopySegment *seg = &segs[i];
refs[i] = to_domain ? seg->dest.foreign.ref :
seg->source.foreign.ref;
}
map = xengnttab_map_domain_grant_refs(xendev->xgth, nr_segs,
xendev->frontend_id, refs,
prot);
if (!map) {
error_setg_errno(errp, errno,
"xengnttab_map_domain_grant_refs failed");
goto done;
}
for (i = 0; i < nr_segs; i++) {
XenDeviceGrantCopySegment *seg = &segs[i];
void *page = map + (i * XC_PAGE_SIZE);
if (to_domain) {
memcpy(page + seg->dest.foreign.offset, seg->source.virt,
seg->len);
} else {
memcpy(seg->dest.virt, page + seg->source.foreign.offset,
seg->len);
}
}
if (xengnttab_unmap(xendev->xgth, map, nr_segs)) {
error_setg_errno(errp, errno, "xengnttab_unmap failed");
}
done:
g_free(refs);
}
void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain,
XenDeviceGrantCopySegment segs[],
unsigned int nr_segs, Error **errp)
{
xengnttab_grant_copy_segment_t *xengnttab_segs;
unsigned int i;
if (!xendev->feature_grant_copy) {
compat_copy_grant_refs(xendev, to_domain, segs, nr_segs, errp);
return;
}
xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs);
for (i = 0; i < nr_segs; i++) {
XenDeviceGrantCopySegment *seg = &segs[i];
xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
if (to_domain) {
xengnttab_seg->flags = GNTCOPY_dest_gref;
xengnttab_seg->dest.foreign.domid = xendev->frontend_id;
xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref;
xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset;
xengnttab_seg->source.virt = seg->source.virt;
} else {
xengnttab_seg->flags = GNTCOPY_source_gref;
xengnttab_seg->source.foreign.domid = xendev->frontend_id;
xengnttab_seg->source.foreign.ref = seg->source.foreign.ref;
xengnttab_seg->source.foreign.offset =
seg->source.foreign.offset;
xengnttab_seg->dest.virt = seg->dest.virt;
}
xengnttab_seg->len = seg->len;
}
if (xengnttab_grant_copy(xendev->xgth, nr_segs, xengnttab_segs)) {
error_setg_errno(errp, errno, "xengnttab_grant_copy failed");
goto done;
}
for (i = 0; i < nr_segs; i++) {
xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
if (xengnttab_seg->status != GNTST_okay) {
error_setg(errp, "xengnttab_grant_copy seg[%u] failed", i);
break;
}
}
done:
g_free(xengnttab_segs);
qemu_xen_gnttab_grant_copy(xendev->xgth, to_domain, xendev->frontend_id,
(XenGrantCopySegment *)segs, nr_segs, errp);
}
struct XenEventChannel {
@ -1095,12 +822,12 @@ static bool xen_device_poll(void *opaque)
static void xen_device_event(void *opaque)
{
XenEventChannel *channel = opaque;
unsigned long port = xenevtchn_pending(channel->xeh);
unsigned long port = qemu_xen_evtchn_pending(channel->xeh);
if (port == channel->local_port) {
xen_device_poll(channel);
xenevtchn_unmask(channel->xeh, port);
qemu_xen_evtchn_unmask(channel->xeh, port);
}
}
@ -1115,11 +842,11 @@ void xen_device_set_event_channel_context(XenDevice *xendev,
}
if (channel->ctx)
aio_set_fd_handler(channel->ctx, xenevtchn_fd(channel->xeh), true,
aio_set_fd_handler(channel->ctx, qemu_xen_evtchn_fd(channel->xeh), true,
NULL, NULL, NULL, NULL, NULL);
channel->ctx = ctx;
aio_set_fd_handler(channel->ctx, xenevtchn_fd(channel->xeh), true,
aio_set_fd_handler(channel->ctx, qemu_xen_evtchn_fd(channel->xeh), true,
xen_device_event, NULL, xen_device_poll, NULL, channel);
}
@ -1131,13 +858,13 @@ XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev,
XenEventChannel *channel = g_new0(XenEventChannel, 1);
xenevtchn_port_or_error_t local_port;
channel->xeh = xenevtchn_open(NULL, 0);
channel->xeh = qemu_xen_evtchn_open();
if (!channel->xeh) {
error_setg_errno(errp, errno, "failed xenevtchn_open");
goto fail;
}
local_port = xenevtchn_bind_interdomain(channel->xeh,
local_port = qemu_xen_evtchn_bind_interdomain(channel->xeh,
xendev->frontend_id,
port);
if (local_port < 0) {
@ -1160,7 +887,7 @@ XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev,
fail:
if (channel->xeh) {
xenevtchn_close(channel->xeh);
qemu_xen_evtchn_close(channel->xeh);
}
g_free(channel);
@ -1177,7 +904,7 @@ void xen_device_notify_event_channel(XenDevice *xendev,
return;
}
if (xenevtchn_notify(channel->xeh, channel->local_port) < 0) {
if (qemu_xen_evtchn_notify(channel->xeh, channel->local_port) < 0) {
error_setg_errno(errp, errno, "xenevtchn_notify failed");
}
}
@ -1193,14 +920,14 @@ void xen_device_unbind_event_channel(XenDevice *xendev,
QLIST_REMOVE(channel, list);
aio_set_fd_handler(channel->ctx, xenevtchn_fd(channel->xeh), true,
aio_set_fd_handler(channel->ctx, qemu_xen_evtchn_fd(channel->xeh), true,
NULL, NULL, NULL, NULL, NULL);
if (xenevtchn_unbind(channel->xeh, channel->local_port) < 0) {
if (qemu_xen_evtchn_unbind(channel->xeh, channel->local_port) < 0) {
error_setg_errno(errp, errno, "xenevtchn_unbind failed");
}
xenevtchn_close(channel->xeh);
qemu_xen_evtchn_close(channel->xeh);
g_free(channel);
}
@ -1235,17 +962,12 @@ static void xen_device_unrealize(DeviceState *dev)
xen_device_backend_destroy(xendev);
if (xendev->xgth) {
xengnttab_close(xendev->xgth);
qemu_xen_gnttab_close(xendev->xgth);
xendev->xgth = NULL;
}
if (xendev->watch_list) {
watch_list_destroy(xendev->watch_list);
xendev->watch_list = NULL;
}
if (xendev->xsh) {
xs_close(xendev->xsh);
qemu_xen_xs_close(xendev->xsh);
xendev->xsh = NULL;
}
@ -1290,23 +1012,18 @@ static void xen_device_realize(DeviceState *dev, Error **errp)
trace_xen_device_realize(type, xendev->name);
xendev->xsh = xs_open(0);
xendev->xsh = qemu_xen_xs_open();
if (!xendev->xsh) {
error_setg_errno(errp, errno, "failed xs_open");
goto unrealize;
}
xendev->watch_list = watch_list_create(xendev->xsh);
xendev->xgth = xengnttab_open(NULL, 0);
xendev->xgth = qemu_xen_gnttab_open();
if (!xendev->xgth) {
error_setg_errno(errp, errno, "failed xengnttab_open");
goto unrealize;
}
xendev->feature_grant_copy =
(xengnttab_grant_copy(xendev->xgth, 0, NULL) == 0);
xen_device_backend_create(xendev, errp);
if (*errp) {
goto unrealize;
@ -1317,13 +1034,6 @@ static void xen_device_realize(DeviceState *dev, Error **errp)
goto unrealize;
}
if (xendev_class->realize) {
xendev_class->realize(xendev, errp);
if (*errp) {
goto unrealize;
}
}
xen_device_backend_printf(xendev, "frontend", "%s",
xendev->frontend_path);
xen_device_backend_printf(xendev, "frontend-id", "%u",
@ -1342,6 +1052,13 @@ static void xen_device_realize(DeviceState *dev, Error **errp)
xen_device_frontend_set_state(xendev, XenbusStateInitialising, true);
}
if (xendev_class->realize) {
xendev_class->realize(xendev, errp);
if (*errp) {
goto unrealize;
}
}
xendev->exit.notify = xen_device_exit;
qemu_add_exit_notifier(&xendev->exit);
return;

268
hw/xen/xen-legacy-backend.c
View file

@ -39,11 +39,10 @@ BusState *xen_sysbus;
/* ------------------------------------------------------------- */
/* public */
struct xs_handle *xenstore;
struct qemu_xs_handle *xenstore;
const char *xen_protocol;
/* private */
static bool xen_feature_grant_copy;
static int debug;
int xenstore_write_be_str(struct XenLegacyDevice *xendev, const char *node,
@ -113,7 +112,7 @@ void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev,
{
assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
if (xengnttab_set_max_grants(xendev->gnttabdev, nr_refs)) {
if (qemu_xen_gnttab_set_max_grants(xendev->gnttabdev, nr_refs)) {
xen_pv_printf(xendev, 0, "xengnttab_set_max_grants failed: %s\n",
strerror(errno));
}
@ -126,8 +125,8 @@ void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs,
assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
ptr = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_refs,
xen_domid, refs, prot);
ptr = qemu_xen_gnttab_map_refs(xendev->gnttabdev, nr_refs, xen_domid, refs,
prot);
if (!ptr) {
xen_pv_printf(xendev, 0,
"xengnttab_map_domain_grant_refs failed: %s\n",
@ -138,123 +137,31 @@ void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs,
}
void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr,
unsigned int nr_refs)
uint32_t *refs, unsigned int nr_refs)
{
assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
if (xengnttab_unmap(xendev->gnttabdev, ptr, nr_refs)) {
if (qemu_xen_gnttab_unmap(xendev->gnttabdev, ptr, refs, nr_refs)) {
xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
strerror(errno));
}
}
static int compat_copy_grant_refs(struct XenLegacyDevice *xendev,
bool to_domain,
XenGrantCopySegment segs[],
unsigned int nr_segs)
{
uint32_t *refs = g_new(uint32_t, nr_segs);
int prot = to_domain ? PROT_WRITE : PROT_READ;
void *pages;
unsigned int i;
for (i = 0; i < nr_segs; i++) {
XenGrantCopySegment *seg = &segs[i];
refs[i] = to_domain ?
seg->dest.foreign.ref : seg->source.foreign.ref;
}
pages = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_segs,
xen_domid, refs, prot);
if (!pages) {
xen_pv_printf(xendev, 0,
"xengnttab_map_domain_grant_refs failed: %s\n",
strerror(errno));
g_free(refs);
return -1;
}
for (i = 0; i < nr_segs; i++) {
XenGrantCopySegment *seg = &segs[i];
void *page = pages + (i * XC_PAGE_SIZE);
if (to_domain) {
memcpy(page + seg->dest.foreign.offset, seg->source.virt,
seg->len);
} else {
memcpy(seg->dest.virt, page + seg->source.foreign.offset,
seg->len);
}
}
if (xengnttab_unmap(xendev->gnttabdev, pages, nr_segs)) {
xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
strerror(errno));
}
g_free(refs);
return 0;
}
int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev,
bool to_domain,
XenGrantCopySegment segs[],
unsigned int nr_segs)
{
xengnttab_grant_copy_segment_t *xengnttab_segs;
unsigned int i;
int rc;
assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
if (!xen_feature_grant_copy) {
return compat_copy_grant_refs(xendev, to_domain, segs, nr_segs);
}
xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs);
for (i = 0; i < nr_segs; i++) {
XenGrantCopySegment *seg = &segs[i];
xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
if (to_domain) {
xengnttab_seg->flags = GNTCOPY_dest_gref;
xengnttab_seg->dest.foreign.domid = xen_domid;
xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref;
xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset;
xengnttab_seg->source.virt = seg->source.virt;
} else {
xengnttab_seg->flags = GNTCOPY_source_gref;
xengnttab_seg->source.foreign.domid = xen_domid;
xengnttab_seg->source.foreign.ref = seg->source.foreign.ref;
xengnttab_seg->source.foreign.offset =
seg->source.foreign.offset;
xengnttab_seg->dest.virt = seg->dest.virt;
}
xengnttab_seg->len = seg->len;
}
rc = xengnttab_grant_copy(xendev->gnttabdev, nr_segs, xengnttab_segs);
rc = qemu_xen_gnttab_grant_copy(xendev->gnttabdev, to_domain, xen_domid,
segs, nr_segs, NULL);
if (rc) {
xen_pv_printf(xendev, 0, "xengnttab_copy failed: %s\n",
strerror(errno));
xen_pv_printf(xendev, 0, "xengnttab_grant_copy failed: %s\n",
strerror(-rc));
}
for (i = 0; i < nr_segs; i++) {
xengnttab_grant_copy_segment_t *xengnttab_seg =
&xengnttab_segs[i];
if (xengnttab_seg->status != GNTST_okay) {
xen_pv_printf(xendev, 0, "segment[%u] status: %d\n", i,
xengnttab_seg->status);
rc = -1;
}
}
g_free(xengnttab_segs);
return rc;
}
@ -294,13 +201,13 @@ static struct XenLegacyDevice *xen_be_get_xendev(const char *type, int dom,
xendev->debug = debug;
xendev->local_port = -1;
xendev->evtchndev = xenevtchn_open(NULL, 0);
xendev->evtchndev = qemu_xen_evtchn_open();
if (xendev->evtchndev == NULL) {
xen_pv_printf(NULL, 0, "can't open evtchn device\n");
qdev_unplug(DEVICE(xendev), NULL);
return NULL;
}
qemu_set_cloexec(xenevtchn_fd(xendev->evtchndev));
qemu_set_cloexec(qemu_xen_evtchn_fd(xendev->evtchndev));
xen_pv_insert_xendev(xendev);
@ -367,6 +274,25 @@ static void xen_be_frontend_changed(struct XenLegacyDevice *xendev,
}
}
static void xenstore_update_fe(void *opaque, const char *watch)
{
struct XenLegacyDevice *xendev = opaque;
const char *node;
unsigned int len;
len = strlen(xendev->fe);
if (strncmp(xendev->fe, watch, len) != 0) {
return;
}
if (watch[len] != '/') {
return;
}
node = watch + len + 1;
xen_be_frontend_changed(xendev, node);
xen_be_check_state(xendev);
}
/* ------------------------------------------------------------- */
/* Check for possible state transitions and perform them. */
@ -380,7 +306,6 @@ static void xen_be_frontend_changed(struct XenLegacyDevice *xendev,
*/
static int xen_be_try_setup(struct XenLegacyDevice *xendev)
{
char token[XEN_BUFSIZE];
int be_state;
if (xenstore_read_be_int(xendev, "state", &be_state) == -1) {
@ -401,8 +326,9 @@ static int xen_be_try_setup(struct XenLegacyDevice *xendev)
}
/* setup frontend watch */
snprintf(token, sizeof(token), "fe:%p", xendev);
if (!xs_watch(xenstore, xendev->fe, token)) {
xendev->watch = qemu_xen_xs_watch(xenstore, xendev->fe, xenstore_update_fe,
xendev);
if (!xendev->watch) {
xen_pv_printf(xendev, 0, "watching frontend path (%s) failed\n",
xendev->fe);
return -1;
@ -466,7 +392,7 @@ static int xen_be_try_initialise(struct XenLegacyDevice *xendev)
}
if (xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV) {
xendev->gnttabdev = xengnttab_open(NULL, 0);
xendev->gnttabdev = qemu_xen_gnttab_open();
if (xendev->gnttabdev == NULL) {
xen_pv_printf(NULL, 0, "can't open gnttab device\n");
return -1;
@ -524,7 +450,7 @@ static void xen_be_disconnect(struct XenLegacyDevice *xendev,
xendev->ops->disconnect(xendev);
}
if (xendev->gnttabdev) {
xengnttab_close(xendev->gnttabdev);
qemu_xen_gnttab_close(xendev->gnttabdev);
xendev->gnttabdev = NULL;
}
if (xendev->be_state != state) {
@ -591,24 +517,67 @@ void xen_be_check_state(struct XenLegacyDevice *xendev)
/* ------------------------------------------------------------- */
struct xenstore_be {
const char *type;
int dom;
struct XenDevOps *ops;
};
static void xenstore_update_be(void *opaque, const char *watch)
{
struct xenstore_be *be = opaque;
struct XenLegacyDevice *xendev;
char path[XEN_BUFSIZE], *bepath;
unsigned int len, dev;
len = snprintf(path, sizeof(path), "backend/%s/%d", be->type, be->dom);
if (strncmp(path, watch, len) != 0) {
return;
}
if (sscanf(watch + len, "/%u/%255s", &dev, path) != 2) {
strcpy(path, "");
if (sscanf(watch + len, "/%u", &dev) != 1) {
dev = -1;
}
}
if (dev == -1) {
return;
}
xendev = xen_be_get_xendev(be->type, be->dom, dev, be->ops);
if (xendev != NULL) {
bepath = qemu_xen_xs_read(xenstore, 0, xendev->be, &len);
if (bepath == NULL) {
xen_pv_del_xendev(xendev);
} else {
free(bepath);
xen_be_backend_changed(xendev, path);
xen_be_check_state(xendev);
}
}
}
static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops)
{
struct XenLegacyDevice *xendev;
char path[XEN_BUFSIZE], token[XEN_BUFSIZE];
char path[XEN_BUFSIZE];
struct xenstore_be *be = g_new0(struct xenstore_be, 1);
char **dev = NULL;
unsigned int cdev, j;
/* setup watch */
snprintf(token, sizeof(token), "be:%p:%d:%p", type, dom, ops);
be->type = type;
be->dom = dom;
be->ops = ops;
snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
if (!xs_watch(xenstore, path, token)) {
if (!qemu_xen_xs_watch(xenstore, path, xenstore_update_be, be)) {
xen_pv_printf(NULL, 0, "xen be: watching backend path (%s) failed\n",
path);
return -1;
}
/* look for backends */
dev = xs_directory(xenstore, 0, path, &cdev);
dev = qemu_xen_xs_directory(xenstore, 0, path, &cdev);
if (!dev) {
return 0;
}
@ -623,57 +592,6 @@ static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops)
return 0;
}
void xenstore_update_be(char *watch, char *type, int dom,
struct XenDevOps *ops)
{
struct XenLegacyDevice *xendev;
char path[XEN_BUFSIZE], *bepath;
unsigned int len, dev;
len = snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
if (strncmp(path, watch, len) != 0) {
return;
}
if (sscanf(watch + len, "/%u/%255s", &dev, path) != 2) {
strcpy(path, "");
if (sscanf(watch + len, "/%u", &dev) != 1) {
dev = -1;
}
}
if (dev == -1) {
return;
}
xendev = xen_be_get_xendev(type, dom, dev, ops);
if (xendev != NULL) {
bepath = xs_read(xenstore, 0, xendev->be, &len);
if (bepath == NULL) {
xen_pv_del_xendev(xendev);
} else {
free(bepath);
xen_be_backend_changed(xendev, path);
xen_be_check_state(xendev);
}
}
}
void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev)
{
char *node;
unsigned int len;
len = strlen(xendev->fe);
if (strncmp(xendev->fe, watch, len) != 0) {
return;
}
if (watch[len] != '/') {
return;
}
node = watch + len + 1;
xen_be_frontend_changed(xendev, node);
xen_be_check_state(xendev);
}
/* -------------------------------------------------------------------- */
static void xen_set_dynamic_sysbus(void)
@ -687,29 +605,17 @@ static void xen_set_dynamic_sysbus(void)
void xen_be_init(void)
{
xengnttab_handle *gnttabdev;
xenstore = xs_daemon_open();
xenstore = qemu_xen_xs_open();
if (!xenstore) {
xen_pv_printf(NULL, 0, "can't connect to xenstored\n");
exit(1);
}
qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL);
if (xen_xc == NULL || xen_fmem == NULL) {
if (xen_evtchn_ops == NULL || xen_gnttab_ops == NULL) {
xen_pv_printf(NULL, 0, "Xen operations not set up\n");
exit(1);
}
gnttabdev = xengnttab_open(NULL, 0);
if (gnttabdev != NULL) {
if (xengnttab_grant_copy(gnttabdev, 0, NULL) == 0) {
xen_feature_grant_copy = true;
}
xengnttab_close(gnttabdev);
}
xen_sysdev = qdev_new(TYPE_XENSYSDEV);
sysbus_realize_and_unref(SYS_BUS_DEVICE(xen_sysdev), &error_fatal);
xen_sysbus = qbus_new(TYPE_XENSYSBUS, xen_sysdev, "xen-sysbus");
@ -751,14 +657,14 @@ int xen_be_bind_evtchn(struct XenLegacyDevice *xendev)
if (xendev->local_port != -1) {
return 0;
}
xendev->local_port = xenevtchn_bind_interdomain
xendev->local_port = qemu_xen_evtchn_bind_interdomain
(xendev->evtchndev, xendev->dom, xendev->remote_port);
if (xendev->local_port == -1) {
xen_pv_printf(xendev, 0, "xenevtchn_bind_interdomain failed\n");
return -1;
}
xen_pv_printf(xendev, 2, "bind evtchn port %d\n", xendev->local_port);
qemu_set_fd_handler(xenevtchn_fd(xendev->evtchndev),
qemu_set_fd_handler(qemu_xen_evtchn_fd(xendev->evtchndev),
xen_pv_evtchn_event, NULL, xendev);
return 0;
}

478
hw/xen/xen-operations.c Normal file
View file

@ -0,0 +1,478 @@
/*
* QEMU Xen backend support: Operations for true Xen
*
* Copyright © 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Authors: David Woodhouse <dwmw2@infradead.org>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/uuid.h"
#include "qapi/error.h"
#include "hw/xen/xen_native.h"
#include "hw/xen/xen_backend_ops.h"
/*
* If we have new enough libxenctrl then we do not want/need these compat
* interfaces, despite what the user supplied cflags might say. They
* must be undefined before including xenctrl.h
*/
#undef XC_WANT_COMPAT_EVTCHN_API
#undef XC_WANT_COMPAT_GNTTAB_API
#undef XC_WANT_COMPAT_MAP_FOREIGN_API
#include <xenctrl.h>
/*
* We don't support Xen prior to 4.2.0.
*/
/* Xen 4.2 through 4.6 */
#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 40701
typedef xc_evtchn xenevtchn_handle;
typedef evtchn_port_or_error_t xenevtchn_port_or_error_t;
#define xenevtchn_open(l, f) xc_evtchn_open(l, f);
#define xenevtchn_close(h) xc_evtchn_close(h)
#define xenevtchn_fd(h) xc_evtchn_fd(h)
#define xenevtchn_pending(h) xc_evtchn_pending(h)
#define xenevtchn_notify(h, p) xc_evtchn_notify(h, p)
#define xenevtchn_bind_interdomain(h, d, p) xc_evtchn_bind_interdomain(h, d, p)
#define xenevtchn_unmask(h, p) xc_evtchn_unmask(h, p)
#define xenevtchn_unbind(h, p) xc_evtchn_unbind(h, p)
typedef xc_gnttab xengnttab_handle;
#define xengnttab_open(l, f) xc_gnttab_open(l, f)
#define xengnttab_close(h) xc_gnttab_close(h)
#define xengnttab_set_max_grants(h, n) xc_gnttab_set_max_grants(h, n)
#define xengnttab_map_grant_ref(h, d, r, p) xc_gnttab_map_grant_ref(h, d, r, p)
#define xengnttab_unmap(h, a, n) xc_gnttab_munmap(h, a, n)
#define xengnttab_map_grant_refs(h, c, d, r, p) \
xc_gnttab_map_grant_refs(h, c, d, r, p)
#define xengnttab_map_domain_grant_refs(h, c, d, r, p) \
xc_gnttab_map_domain_grant_refs(h, c, d, r, p)
typedef xc_interface xenforeignmemory_handle;
#else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40701 */
#include <xenevtchn.h>
#include <xengnttab.h>
#include <xenforeignmemory.h>
#endif
/* Xen before 4.8 */
static int libxengnttab_fallback_grant_copy(xengnttab_handle *xgt,
bool to_domain, uint32_t domid,
XenGrantCopySegment segs[],
unsigned int nr_segs, Error **errp)
{
uint32_t *refs = g_new(uint32_t, nr_segs);
int prot = to_domain ? PROT_WRITE : PROT_READ;
void *map;
unsigned int i;
int rc = 0;
for (i = 0; i < nr_segs; i++) {
XenGrantCopySegment *seg = &segs[i];
refs[i] = to_domain ? seg->dest.foreign.ref :
seg->source.foreign.ref;
}
map = xengnttab_map_domain_grant_refs(xgt, nr_segs, domid, refs, prot);
if (!map) {
if (errp) {
error_setg_errno(errp, errno,
"xengnttab_map_domain_grant_refs failed");
}
rc = -errno;
goto done;
}
for (i = 0; i < nr_segs; i++) {
XenGrantCopySegment *seg = &segs[i];
void *page = map + (i * XEN_PAGE_SIZE);
if (to_domain) {
memcpy(page + seg->dest.foreign.offset, seg->source.virt,
seg->len);
} else {
memcpy(seg->dest.virt, page + seg->source.foreign.offset,
seg->len);
}
}
if (xengnttab_unmap(xgt, map, nr_segs)) {
if (errp) {
error_setg_errno(errp, errno, "xengnttab_unmap failed");
}
rc = -errno;
}
done:
g_free(refs);
return rc;
}
#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40800
static int libxengnttab_backend_grant_copy(xengnttab_handle *xgt,
bool to_domain, uint32_t domid,
XenGrantCopySegment *segs,
uint32_t nr_segs, Error **errp)
{
xengnttab_grant_copy_segment_t *xengnttab_segs;
unsigned int i;
int rc;
xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs);
for (i = 0; i < nr_segs; i++) {
XenGrantCopySegment *seg = &segs[i];
xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
if (to_domain) {
xengnttab_seg->flags = GNTCOPY_dest_gref;
xengnttab_seg->dest.foreign.domid = domid;
xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref;
xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset;
xengnttab_seg->source.virt = seg->source.virt;
} else {
xengnttab_seg->flags = GNTCOPY_source_gref;
xengnttab_seg->source.foreign.domid = domid;
xengnttab_seg->source.foreign.ref = seg->source.foreign.ref;
xengnttab_seg->source.foreign.offset =
seg->source.foreign.offset;
xengnttab_seg->dest.virt = seg->dest.virt;
}
xengnttab_seg->len = seg->len;
}
if (xengnttab_grant_copy(xgt, nr_segs, xengnttab_segs)) {
if (errp) {
error_setg_errno(errp, errno, "xengnttab_grant_copy failed");
}
rc = -errno;
goto done;
}
rc = 0;
for (i = 0; i < nr_segs; i++) {
xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
if (xengnttab_seg->status != GNTST_okay) {
if (errp) {
error_setg(errp, "xengnttab_grant_copy seg[%u] failed", i);
}
rc = -EIO;
break;
}
}
done:
g_free(xengnttab_segs);
return rc;
}
#endif
static xenevtchn_handle *libxenevtchn_backend_open(void)
{
return xenevtchn_open(NULL, 0);
}
struct evtchn_backend_ops libxenevtchn_backend_ops = {
.open = libxenevtchn_backend_open,
.close = xenevtchn_close,
.bind_interdomain = xenevtchn_bind_interdomain,
.unbind = xenevtchn_unbind,
.get_fd = xenevtchn_fd,
.notify = xenevtchn_notify,
.unmask = xenevtchn_unmask,
.pending = xenevtchn_pending,
};
static xengnttab_handle *libxengnttab_backend_open(void)
{
return xengnttab_open(NULL, 0);
}
static int libxengnttab_backend_unmap(xengnttab_handle *xgt,
void *start_address, uint32_t *refs,
uint32_t count)
{
return xengnttab_unmap(xgt, start_address, count);
}
static struct gnttab_backend_ops libxengnttab_backend_ops = {
.features = XEN_GNTTAB_OP_FEATURE_MAP_MULTIPLE,
.open = libxengnttab_backend_open,
.close = xengnttab_close,
.grant_copy = libxengnttab_fallback_grant_copy,
.set_max_grants = xengnttab_set_max_grants,
.map_refs = xengnttab_map_domain_grant_refs,
.unmap = libxengnttab_backend_unmap,
};
#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 40701
static void *libxenforeignmem_backend_map(uint32_t dom, void *addr, int prot,
size_t pages, xfn_pfn_t *pfns,
int *errs)
{
if (errs) {
return xc_map_foreign_bulk(xen_xc, dom, prot, pfns, errs, pages);
} else {
return xc_map_foreign_pages(xen_xc, dom, prot, pfns, pages);
}
}
static int libxenforeignmem_backend_unmap(void *addr, size_t pages)
{
return munmap(addr, pages * XC_PAGE_SIZE);
}
#else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40701 */
static void *libxenforeignmem_backend_map(uint32_t dom, void *addr, int prot,
size_t pages, xen_pfn_t *pfns,
int *errs)
{
return xenforeignmemory_map2(xen_fmem, dom, addr, prot, 0, pages, pfns,
errs);
}
static int libxenforeignmem_backend_unmap(void *addr, size_t pages)
{
return xenforeignmemory_unmap(xen_fmem, addr, pages);
}
#endif
struct foreignmem_backend_ops libxenforeignmem_backend_ops = {
.map = libxenforeignmem_backend_map,
.unmap = libxenforeignmem_backend_unmap,
};
struct qemu_xs_handle {
struct xs_handle *xsh;
NotifierList notifiers;
};
static void watch_event(void *opaque)
{
struct qemu_xs_handle *h = opaque;
for (;;) {
char **v = xs_check_watch(h->xsh);
if (!v) {
break;
}
notifier_list_notify(&h->notifiers, v);
free(v);
}
}
static struct qemu_xs_handle *libxenstore_open(void)
{
struct xs_handle *xsh = xs_open(0);
struct qemu_xs_handle *h = g_new0(struct qemu_xs_handle, 1);
if (!xsh) {
return NULL;
}
h = g_new0(struct qemu_xs_handle, 1);
h->xsh = xsh;
notifier_list_init(&h->notifiers);
qemu_set_fd_handler(xs_fileno(h->xsh), watch_event, NULL, h);
return h;
}
static void libxenstore_close(struct qemu_xs_handle *h)
{
g_assert(notifier_list_empty(&h->notifiers));
qemu_set_fd_handler(xs_fileno(h->xsh), NULL, NULL, NULL);
xs_close(h->xsh);
g_free(h);
}
static char *libxenstore_get_domain_path(struct qemu_xs_handle *h,
unsigned int domid)
{
return xs_get_domain_path(h->xsh, domid);
}
static char **libxenstore_directory(struct qemu_xs_handle *h,
xs_transaction_t t, const char *path,
unsigned int *num)
{
return xs_directory(h->xsh, t, path, num);
}
static void *libxenstore_read(struct qemu_xs_handle *h, xs_transaction_t t,
const char *path, unsigned int *len)
{
return xs_read(h->xsh, t, path, len);
}
static bool libxenstore_write(struct qemu_xs_handle *h, xs_transaction_t t,
const char *path, const void *data,
unsigned int len)
{
return xs_write(h->xsh, t, path, data, len);
}
static bool libxenstore_create(struct qemu_xs_handle *h, xs_transaction_t t,
unsigned int owner, unsigned int domid,
unsigned int perms, const char *path)
{
struct xs_permissions perms_list[] = {
{
.id = owner,
.perms = XS_PERM_NONE,
},
{
.id = domid,
.perms = perms,
},
};
if (!xs_mkdir(h->xsh, t, path)) {
return false;
}
return xs_set_permissions(h->xsh, t, path, perms_list,
ARRAY_SIZE(perms_list));
}
static bool libxenstore_destroy(struct qemu_xs_handle *h, xs_transaction_t t,
const char *path)
{
return xs_rm(h->xsh, t, path);
}
struct qemu_xs_watch {
char *path;
char *token;
xs_watch_fn fn;
void *opaque;
Notifier notifier;
};
static void watch_notify(Notifier *n, void *data)
{
struct qemu_xs_watch *w = container_of(n, struct qemu_xs_watch, notifier);
const char **v = data;
if (!strcmp(w->token, v[XS_WATCH_TOKEN])) {
w->fn(w->opaque, v[XS_WATCH_PATH]);
}
}
static struct qemu_xs_watch *new_watch(const char *path, xs_watch_fn fn,
void *opaque)
{
struct qemu_xs_watch *w = g_new0(struct qemu_xs_watch, 1);
QemuUUID uuid;
qemu_uuid_generate(&uuid);
w->token = qemu_uuid_unparse_strdup(&uuid);
w->path = g_strdup(path);
w->fn = fn;
w->opaque = opaque;
w->notifier.notify = watch_notify;
return w;
}
static void free_watch(struct qemu_xs_watch *w)
{
g_free(w->token);
g_free(w->path);
g_free(w);
}
static struct qemu_xs_watch *libxenstore_watch(struct qemu_xs_handle *h,
const char *path, xs_watch_fn fn,
void *opaque)
{
struct qemu_xs_watch *w = new_watch(path, fn, opaque);
notifier_list_add(&h->notifiers, &w->notifier);
if (!xs_watch(h->xsh, path, w->token)) {
notifier_remove(&w->notifier);
free_watch(w);
return NULL;
}
return w;
}
static void libxenstore_unwatch(struct qemu_xs_handle *h,
struct qemu_xs_watch *w)
{
xs_unwatch(h->xsh, w->path, w->token);
notifier_remove(&w->notifier);
free_watch(w);
}
static xs_transaction_t libxenstore_transaction_start(struct qemu_xs_handle *h)
{
return xs_transaction_start(h->xsh);
}
static bool libxenstore_transaction_end(struct qemu_xs_handle *h,
xs_transaction_t t, bool abort)
{
return xs_transaction_end(h->xsh, t, abort);
}
struct xenstore_backend_ops libxenstore_backend_ops = {
.open = libxenstore_open,
.close = libxenstore_close,
.get_domain_path = libxenstore_get_domain_path,
.directory = libxenstore_directory,
.read = libxenstore_read,
.write = libxenstore_write,
.create = libxenstore_create,
.destroy = libxenstore_destroy,
.watch = libxenstore_watch,
.unwatch = libxenstore_unwatch,
.transaction_start = libxenstore_transaction_start,
.transaction_end = libxenstore_transaction_end,
};
void setup_xen_backend_ops(void)
{
#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40800
xengnttab_handle *xgt = xengnttab_open(NULL, 0);
if (xgt) {
if (xengnttab_grant_copy(xgt, 0, NULL) == 0) {
libxengnttab_backend_ops.grant_copy = libxengnttab_backend_grant_copy;
}
xengnttab_close(xgt);
}
#endif
xen_evtchn_ops = &libxenevtchn_backend_ops;
xen_gnttab_ops = &libxengnttab_backend_ops;
xen_foreignmem_ops = &libxenforeignmem_backend_ops;
xen_xenstore_ops = &libxenstore_backend_ops;
}

4
hw/xen/xen_devconfig.c
View file

@ -11,11 +11,11 @@ static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
{
char *dom;
dom = xs_get_domain_path(xenstore, xen_domid);
dom = qemu_xen_xs_get_domain_path(xenstore, xen_domid);
snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
free(dom);
dom = xs_get_domain_path(xenstore, 0);
dom = qemu_xen_xs_get_domain_path(xenstore, 0);
snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
free(dom);

2
hw/xen/xen_pt.c
View file

@ -60,9 +60,9 @@
#include "hw/pci/pci_bus.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "xen_pt.h"
#include "hw/xen/xen.h"
#include "hw/xen/xen-legacy-backend.h"
#include "xen_pt.h"
#include "qemu/range.h"
static bool has_igd_gfx_passthru;

2
hw/xen/xen_pt.h
View file

@ -1,7 +1,7 @@
#ifndef XEN_PT_H
#define XEN_PT_H
#include "hw/xen/xen_common.h"
#include "hw/xen/xen_native.h"
#include "xen-host-pci-device.h"
#include "qom/object.h"

2
hw/xen/xen_pt_config_init.c
View file

@ -15,8 +15,8 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/timer.h"
#include "hw/xen/xen-legacy-backend.h"
#include "xen_pt.h"
#include "hw/xen/xen-legacy-backend.h"
#define XEN_PT_MERGE_VALUE(value, data, val_mask) \
(((value) & (val_mask)) | ((data) & ~(val_mask)))

1
hw/xen/xen_pt_graphics.c
View file

@ -5,7 +5,6 @@
#include "qapi/error.h"
#include "xen_pt.h"
#include "xen-host-pci-device.h"
#include "hw/xen/xen-legacy-backend.h"
static unsigned long igd_guest_opregion;
static unsigned long igd_host_opregion;

4
hw/xen/xen_pt_msi.c
View file

@ -11,9 +11,9 @@
#include "qemu/osdep.h"
#include "hw/xen/xen-legacy-backend.h"
#include "xen_pt.h"
#include "hw/i386/apic-msidef.h"
#include "xen_pt.h"
#include "hw/xen/xen-legacy-backend.h"
#define XEN_PT_AUTO_ASSIGN -1

63
hw/xen/xen_pvdev.c
View file

@ -54,31 +54,17 @@ void xen_config_cleanup(void)
struct xs_dirs *d;
QTAILQ_FOREACH(d, &xs_cleanup, list) {
xs_rm(xenstore, 0, d->xs_dir);
qemu_xen_xs_destroy(xenstore, 0, d->xs_dir);
}
}
int xenstore_mkdir(char *path, int p)
{
struct xs_permissions perms[2] = {
{
.id = 0, /* set owner: dom0 */
}, {
.id = xen_domid,
.perms = p,
}
};
if (!xs_mkdir(xenstore, 0, path)) {
if (!qemu_xen_xs_create(xenstore, 0, 0, xen_domid, p, path)) {
xen_pv_printf(NULL, 0, "xs_mkdir %s: failed\n", path);
return -1;
}
xenstore_cleanup_dir(g_strdup(path));
if (!xs_set_permissions(xenstore, 0, path, perms, 2)) {
xen_pv_printf(NULL, 0, "xs_set_permissions %s: failed\n", path);
return -1;
}
return 0;
}
@ -87,7 +73,7 @@ int xenstore_write_str(const char *base, const char *node, const char *val)
char abspath[XEN_BUFSIZE];
snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
if (!xs_write(xenstore, 0, abspath, val, strlen(val))) {
if (!qemu_xen_xs_write(xenstore, 0, abspath, val, strlen(val))) {
return -1;
}
return 0;
@ -100,7 +86,7 @@ char *xenstore_read_str(const char *base, const char *node)
char *str, *ret = NULL;
snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
str = xs_read(xenstore, 0, abspath, &len);
str = qemu_xen_xs_read(xenstore, 0, abspath, &len);
if (str != NULL) {
/* move to qemu-allocated memory to make sure
* callers can savely g_free() stuff. */
@ -152,29 +138,6 @@ int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval)
return rc;
}
void xenstore_update(void *unused)
{
char **vec = NULL;
intptr_t type, ops, ptr;
unsigned int dom, count;
vec = xs_read_watch(xenstore, &count);
if (vec == NULL) {
goto cleanup;
}
if (sscanf(vec[XS_WATCH_TOKEN], "be:%" PRIxPTR ":%d:%" PRIxPTR,
&type, &dom, &ops) == 3) {
xenstore_update_be(vec[XS_WATCH_PATH], (void *)type, dom, (void*)ops);
}
if (sscanf(vec[XS_WATCH_TOKEN], "fe:%" PRIxPTR, &ptr) == 1) {
xenstore_update_fe(vec[XS_WATCH_PATH], (void *)ptr);
}
cleanup:
free(vec);
}
const char *xenbus_strstate(enum xenbus_state state)
{
static const char *const name[] = {
@ -238,14 +201,14 @@ void xen_pv_evtchn_event(void *opaque)
struct XenLegacyDevice *xendev = opaque;
evtchn_port_t port;
port = xenevtchn_pending(xendev->evtchndev);
port = qemu_xen_evtchn_pending(xendev->evtchndev);
if (port != xendev->local_port) {
xen_pv_printf(xendev, 0,
"xenevtchn_pending returned %d (expected %d)\n",
port, xendev->local_port);
return;
}
xenevtchn_unmask(xendev->evtchndev, port);
qemu_xen_evtchn_unmask(xendev->evtchndev, port);
if (xendev->ops->event) {
xendev->ops->event(xendev);
@ -257,15 +220,15 @@ void xen_pv_unbind_evtchn(struct XenLegacyDevice *xendev)
if (xendev->local_port == -1) {
return;
}
qemu_set_fd_handler(xenevtchn_fd(xendev->evtchndev), NULL, NULL, NULL);
xenevtchn_unbind(xendev->evtchndev, xendev->local_port);
qemu_set_fd_handler(qemu_xen_evtchn_fd(xendev->evtchndev), NULL, NULL, NULL);
qemu_xen_evtchn_unbind(xendev->evtchndev, xendev->local_port);
xen_pv_printf(xendev, 2, "unbind evtchn port %d\n", xendev->local_port);
xendev->local_port = -1;
}
int xen_pv_send_notify(struct XenLegacyDevice *xendev)
{
return xenevtchn_notify(xendev->evtchndev, xendev->local_port);
return qemu_xen_evtchn_notify(xendev->evtchndev, xendev->local_port);
}
/* ------------------------------------------------------------- */
@ -299,17 +262,15 @@ void xen_pv_del_xendev(struct XenLegacyDevice *xendev)
}
if (xendev->fe) {
char token[XEN_BUFSIZE];
snprintf(token, sizeof(token), "fe:%p", xendev);
xs_unwatch(xenstore, xendev->fe, token);
qemu_xen_xs_unwatch(xenstore, xendev->watch);
g_free(xendev->fe);
}
if (xendev->evtchndev != NULL) {
xenevtchn_close(xendev->evtchndev);
qemu_xen_evtchn_close(xendev->evtchndev);
}
if (xendev->gnttabdev != NULL) {
xengnttab_close(xendev->gnttabdev);
qemu_xen_gnttab_close(xendev->gnttabdev);
}
QTAILQ_REMOVE(&xendevs, xendev, next);