| Message ID | 1499400478-24427-1-git-send-email-xiong.y.zhang@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Jul 07, 2017 at 12:07:58PM +0800, Xiong Zhang wrote: > In igd passthrough environment, guest could only access opregion at the > first bootup time. Once guest shutdown, later guest couldn't access > opregion anymore. > This is because qemu set emulated guest opregion base address to host > register. Later guest get a wrong host opregion base address, and couldn't > access it anymore. > > This patch set emu_mask for igd_opregion register, so guest won't set > guest opregion base address to host. > > Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> > --- > hw/xen/xen_pt_config_init.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c > index 6f18366..1f04ec5 100644 > --- a/hw/xen/xen_pt_config_init.c > +++ b/hw/xen/xen_pt_config_init.c > @@ -1535,6 +1535,7 @@ static XenPTRegInfo xen_pt_emu_reg_igd_opregion[] = { > .offset = 0x0, > .size = 4, > .init_val = 0, > + .emu_mask = 0xFFFFFFFF, > .u.dw.read = xen_pt_intel_opregion_read, > .u.dw.write = xen_pt_intel_opregion_write, > }, > -- > 2.7.4 >
diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c index 6f18366..1f04ec5 100644 --- a/hw/xen/xen_pt_config_init.c +++ b/hw/xen/xen_pt_config_init.c @@ -1535,6 +1535,7 @@ static XenPTRegInfo xen_pt_emu_reg_igd_opregion[] = { .offset = 0x0, .size = 4, .init_val = 0, + .emu_mask = 0xFFFFFFFF, .u.dw.read = xen_pt_intel_opregion_read, .u.dw.write = xen_pt_intel_opregion_write, },
In igd passthrough environment, guest could only access opregion at the first bootup time. Once guest shutdown, later guest couldn't access opregion anymore. This is because qemu set emulated guest opregion base address to host register. Later guest get a wrong host opregion base address, and couldn't access it anymore. This patch set emu_mask for igd_opregion register, so guest won't set guest opregion base address to host. Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com> --- hw/xen/xen_pt_config_init.c | 1 + 1 file changed, 1 insertion(+)