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| author | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-07 03:49:59 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 12:25:33 -0500 |
| commit | e287bd005ad9d85dd6271dd795d3ecfb6bca46ad (patch) | |
| tree | 10e0fac1c9d0378b3af82dbc882c695352177e93 /arch/x86/kvm/kvm-asm-offsets.c | |
| parent | e61ab42de874c5af8c5d98b327c77a374d9e7da1 (diff) | |
| download | linux-e287bd005ad9d85dd6271dd795d3ecfb6bca46ad.tar.gz | |
KVM: SVM: restore host save area from assembly
Allow access to the percpu area via the GS segment base, which is
needed in order to access the saved host spec_ctrl value. In linux-next
FILL_RETURN_BUFFER also needs to access percpu data.
For simplicity, the physical address of the save area is added to struct
svm_cpu_data.
Cc: stable@vger.kernel.org
Fixes: a149180fbcf3 ("x86: Add magic AMD return-thunk")
Reported-by: Nathan Chancellor <nathan@kernel.org>
Analyzed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/kvm-asm-offsets.c')
| -rw-r--r-- | arch/x86/kvm/kvm-asm-offsets.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/kvm-asm-offsets.c b/arch/x86/kvm/kvm-asm-offsets.c index f83e88b85bf2..1b805cd24d66 100644 --- a/arch/x86/kvm/kvm-asm-offsets.c +++ b/arch/x86/kvm/kvm-asm-offsets.c @@ -18,6 +18,7 @@ static void __used common(void) OFFSET(SVM_current_vmcb, vcpu_svm, current_vmcb); OFFSET(SVM_vmcb01, vcpu_svm, vmcb01); OFFSET(KVM_VMCB_pa, kvm_vmcb_info, pa); + OFFSET(SD_save_area_pa, svm_cpu_data, save_area_pa); } if (IS_ENABLED(CONFIG_KVM_INTEL)) { |