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authorSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>2019-11-14 14:15:14 -0600
committerPaolo Bonzini <pbonzini@redhat.com>2020-02-05 15:17:43 +0100
commit9a0bf05430699dc94b7ced940f6270c7cf1d77ef (patch)
tree5c88a9e9a81cbf399dcc2eb6a9458aeadc5f9ce2 /arch/x86/include
parentf4fdc0a2edf48f16f7b10cceaf4781fc56ab7fd9 (diff)
downloadlinux-9a0bf05430699dc94b7ced940f6270c7cf1d77ef.tar.bz2
svm: Deactivate AVIC when launching guest with nested SVM support
Since AVIC does not currently work w/ nested virtualization, deactivate AVIC for the guest if setting CPUID Fn80000001_ECX[SVM] (i.e. indicate support for SVM, which is needed for nested virtualization). Also, introduce a new APICV_INHIBIT_REASON_NESTED bit to be used for this reason. Suggested-by: Alexander Graf <graf@amazon.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/kvm_host.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 90bfe8becc56..ce19dea5f2dd 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -877,6 +877,7 @@ enum kvm_irqchip_mode {
#define APICV_INHIBIT_REASON_DISABLE 0
#define APICV_INHIBIT_REASON_HYPERV 1
+#define APICV_INHIBIT_REASON_NESTED 2
struct kvm_arch {
unsigned long n_used_mmu_pages;