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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2022-10-05 10:21:55 +0100 |
|---|---|---|
| committer | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2022-10-05 10:21:55 +0100 |
| commit | edd1533d3ccd82dd5d600986d27d524e6be4c5fd (patch) | |
| tree | 1ac5ae82ea63114d5c13212e2819531e4507f800 /arch/x86/kvm/svm/sev.c | |
| parent | 7d8fe4cfc54b5fb2093e12cffa8ca74d3c88e0fa (diff) | |
| parent | 98d67f250472cdd0f8d083830be3ec9dbb0c65a8 (diff) | |
Merge branch 'for-6.1/logitech' into for-linus
- Add hanlding of all Bluetooth HID++ devices and fixes in hid++
(Bastien Nocera)
Diffstat (limited to 'arch/x86/kvm/svm/sev.c')
| -rw-r--r-- | arch/x86/kvm/svm/sev.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index b0e793e7d85c..28064060413a 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -22,6 +22,7 @@ #include <asm/trapnr.h> #include <asm/fpu/xcr.h> +#include "mmu.h" #include "x86.h" #include "svm.h" #include "svm_ops.h" @@ -2221,6 +2222,15 @@ void __init sev_hardware_setup(void) if (!sev_es_enabled) goto out; + /* + * SEV-ES requires MMIO caching as KVM doesn't have access to the guest + * instruction stream, i.e. can't emulate in response to a #NPF and + * instead relies on #NPF(RSVD) being reflected into the guest as #VC + * (the guest can then do a #VMGEXIT to request MMIO emulation). + */ + if (!enable_mmio_caching) + goto out; + /* Does the CPU support SEV-ES? */ if (!boot_cpu_has(X86_FEATURE_SEV_ES)) goto out; |