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Introduce Xen PCI Passthrough, MSI

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A more complete history can be found here:
git://xenbits.xensource.com/qemu-xen-unstable.git

Signed-off-by: Jiang Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Shan Haitao <haitao.shan@intel.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Jiang Yunhong 2012-06-21 15:42:35 +00:00 • committed by Stefano Stabellini
parent 9886c23aed
commit 3854ca577d
5 changed files with 1173 additions and 2 deletions
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31
hw/xen_pt.c
View file

@ -36,6 +36,20 @@
*
* Write '1'
* - Set real bit to '1'.
*
* MSI interrupt:
* Initialize MSI register(xen_pt_msi_setup, xen_pt_msi_update)
* Bind MSI(xc_domain_update_msi_irq)
* <fail>
* - Unmap MSI.
* - Set dev->msi->pirq to '-1'.
*
* MSI-X interrupt:
* Initialize MSI-X register(xen_pt_msix_update_one)
* Bind MSI-X(xc_domain_update_msi_irq)
* <fail>
* - Unmap MSI-X.
* - Set entry->pirq to '-1'.
*/
#include <sys/ioctl.h>
@ -534,7 +548,15 @@ static void xen_pt_region_update(XenPCIPassthroughState *s,
};
bar = xen_pt_bar_from_region(s, mr);
if (bar == -1) {
if (bar == -1 && (!s->msix || &s->msix->mmio != mr)) {
return;
}
if (s->msix && &s->msix->mmio == mr) {
if (adding) {
s->msix->mmio_base_addr = sec->offset_within_address_space;
rc = xen_pt_msix_update_remap(s, s->msix->bar_index);
}
return;
}
@ -764,6 +786,13 @@ static int xen_pt_unregister_device(PCIDevice *d)
}
}
if (s->msi) {
xen_pt_msi_disable(s);
}
if (s->msix) {
xen_pt_msix_disable(s);
}
if (machine_irq) {
xen_pt_mapped_machine_irq[machine_irq]--;