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spapr/xive: add KVM support

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This introduces a set of helpers when KVM is in use, which create the
KVM XIVE device, initialize the interrupt sources at a KVM level and
connect the interrupt presenters to the vCPU.

They also handle the initialization of the TIMA and the source ESB
memory regions of the controller. These have a different type under
KVM. They are 'ram device' memory mappings, similarly to VFIO, exposed
to the guest and the associated VMAs on the host are populated
dynamically with the appropriate pages using a fault handler.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20190513084245.25755-3-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2019-05-13 10:42:33 +02:00 • committed by David Gibson
parent 75de59416d
commit 38afd772f8
10 changed files with 344 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

10
include/hw/ppc/spapr_xive.h
View file

@ -38,6 +38,10 @@ typedef struct SpaprXive {
/* TIMA mapping address */
hwaddr tm_base;
MemoryRegion tm_mmio;
/* KVM support */
int fd;
void *tm_mmap;
} SpaprXive;
bool spapr_xive_irq_claim(SpaprXive *xive, uint32_t lisn, bool lsi);
@ -49,5 +53,11 @@ void spapr_dt_xive(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
uint32_t phandle);
void spapr_xive_set_tctx_os_cam(XiveTCTX *tctx);
void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool enable);
void spapr_xive_map_mmio(SpaprXive *xive);
/*
* KVM XIVE device helpers
*/
void kvmppc_xive_connect(SpaprXive *xive, Error **errp);
#endif /* PPC_SPAPR_XIVE_H */

13
include/hw/ppc/xive.h
View file

@ -140,6 +140,7 @@
#ifndef PPC_XIVE_H
#define PPC_XIVE_H
#include "sysemu/kvm.h"
#include "hw/qdev-core.h"
#include "hw/sysbus.h"
#include "hw/ppc/xive_regs.h"
@ -194,6 +195,9 @@ typedef struct XiveSource {
uint32_t esb_shift;
MemoryRegion esb_mmio;
/* KVM support */
void *esb_mmap;
XiveNotifier *xive;
} XiveSource;
@ -423,4 +427,13 @@ static inline uint32_t xive_nvt_cam_line(uint8_t nvt_blk, uint32_t nvt_idx)
return (nvt_blk << 19) | nvt_idx;
}
/*
* KVM XIVE device helpers
*/
void kvmppc_xive_source_reset_one(XiveSource *xsrc, int srcno, Error **errp);
void kvmppc_xive_source_reset(XiveSource *xsrc, Error **errp);
void kvmppc_xive_source_set_irq(void *opaque, int srcno, int val);
void kvmppc_xive_cpu_connect(XiveTCTX *tctx, Error **errp);
#endif /* PPC_XIVE_H */