MIRRORS/linux-imx
1
0
Fork 0
mirror of https://github.com/nxp-imx/linux-imx.git synced 2025-07-18 23:29:57 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

KVM: SVM: fix emulation of msr reads/writes of MSR_FS_BASE and MSR_GS_BASE

Browse Source 
commit dad1613e05 upstream.

If these msrs are read by the emulator (e.g due to 'force emulation' prefix),
SVM code currently fails to extract the corresponding segment bases,
and return them to the emulator.

Fix that.

Cc: stable@vger.kernel.org
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20240802151608.72896-3-mlevitsk@redhat.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maxim Levitsky 2024-08-02 18:16:08 +03:00 committed by Greg Kroah-Hartman
parent 939375737b
commit c98bb4f15e
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/x86/kvm/svm/svm.c
View File

@ -2869,6 +2869,12 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case MSR_CSTAR:
msr_info->data = svm->vmcb01.ptr->save.cstar;
break;
case MSR_GS_BASE:
msr_info->data = svm->vmcb01.ptr->save.gs.base;
break;
case MSR_FS_BASE:
msr_info->data = svm->vmcb01.ptr->save.fs.base;
break;
case MSR_KERNEL_GS_BASE:
msr_info->data = svm->vmcb01.ptr->save.kernel_gs_base;
break;
@ -3090,6 +3096,12 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
case MSR_CSTAR:
svm->vmcb01.ptr->save.cstar = data;
break;
case MSR_GS_BASE:
svm->vmcb01.ptr->save.gs.base = data;
break;
case MSR_FS_BASE:
svm->vmcb01.ptr->save.fs.base = data;
break;
case MSR_KERNEL_GS_BASE:
svm->vmcb01.ptr->save.kernel_gs_base = data;
break;