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| author | Mohamed Mediouni <mohamed@unpredictable.fr> | 2026-08-12 10:28:12 +0200 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2026-08-24 10:51:38 +0300 |
| commit | a4049cf86901cfd05a214e244d78f11032be12ee (patch) | |
| tree | 8d2c401b7d57e38f9d9f1bce4b83b85b06942298 | |
| parent | 5c16e7ad5dc8d262ad522145a29c8d9dace48308 (diff) | |
| download | qemu-a4049cf86901cfd05a214e244d78f11032be12ee.tar.gz qemu-a4049cf86901cfd05a214e244d78f11032be12ee.zip | |
whpx: i386: synchronise PAT too
https://github.com/cmspam/winq-emu hints that this might be wanted for
some use-cases and it's a step towards full state sync:
> Linux uses PAT to mark virtio-gpu / Venus shared memory as
> Write-Combining. Previously the partition's PAT was not
> synchronised with the guest, so the guest's MTRR/PAT cache-type
> computation could fall back to UC for memory that should be WC.
Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260812082814.27217-5-mohamed@unpredictable.fr
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 7b0516912e44e73ba0859e91aed848d5be26f05e)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
| -rw-r--r-- | target/i386/whpx/whpx-all.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c index 1800ba8eb1..2739a80da3 100644 --- a/target/i386/whpx/whpx-all.c +++ b/target/i386/whpx/whpx-all.c @@ -115,7 +115,7 @@ static const WHV_REGISTER_NAME whpx_register_names[] = { #ifdef TARGET_X86_64 WHvX64RegisterKernelGsBase, #endif - /* WHvX64RegisterPat, */ + WHvX64RegisterPat, WHvX64RegisterSysenterCs, WHvX64RegisterSysenterEip, WHvX64RegisterSysenterEsp, @@ -624,9 +624,8 @@ void whpx_set_registers(CPUState *cpu, WHPXStateLevel level) assert(whpx_register_names[idx] == WHvX64RegisterKernelGsBase); vcxt.values[idx++].Reg64 = env->kernelgsbase; #endif - - /* WHvX64RegisterPat - Skipped */ - + assert(whpx_register_names[idx] == WHvX64RegisterPat); + vcxt.values[idx++].Reg64 = env->pat; assert(whpx_register_names[idx] == WHvX64RegisterSysenterCs); vcxt.values[idx++].Reg64 = env->sysenter_cs; assert(whpx_register_names[idx] == WHvX64RegisterSysenterEip); @@ -962,9 +961,8 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel level) assert(whpx_register_names[idx] == WHvX64RegisterKernelGsBase); env->kernelgsbase = vcxt.values[idx++].Reg64; #endif - - /* WHvX64RegisterPat - Skipped */ - + assert(whpx_register_names[idx] == WHvX64RegisterPat); + env->pat = vcxt.values[idx++].Reg64; assert(whpx_register_names[idx] == WHvX64RegisterSysenterCs); env->sysenter_cs = vcxt.values[idx++].Reg64; assert(whpx_register_names[idx] == WHvX64RegisterSysenterEip); |