diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2013-03-13 14:30:50 +0400 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-03-13 18:14:40 +0400 |
| commit | eabeaaccfca0ed61b8e00a09b8cfa703c4f11b59 (patch) | |
| tree | b66ec7c86baaabb2963b530ab7538242a7fd099b | |
| parent | 66450a21f99636af4fafac2afd33f1a40631bc3a (diff) | |
| download | linux-eabeaaccfca0ed61b8e00a09b8cfa703c4f11b59.tar.xz | |
KVM: nVMX: Clean up and fix pin-based execution controls
Only interrupt and NMI exiting are mandatory for KVM to work, thus can
be exposed to the guest unconditionally, virtual NMI exiting is
optional. So we must not advertise it unless the host supports it.
Introduce the symbolic constant PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR at
this chance.
Reviewed-by:: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
| -rw-r--r-- | arch/x86/include/asm/vmx.h | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 10 |
2 files changed, 8 insertions, 4 deletions
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 5fb6e24f0649..3c9f455bacee 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -71,6 +71,8 @@ #define PIN_BASED_NMI_EXITING 0x00000008 #define PIN_BASED_VIRTUAL_NMIS 0x00000020 +#define PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR 0x00000016 + #define VM_EXIT_SAVE_DEBUG_CONTROLS 0x00000002 #define VM_EXIT_HOST_ADDR_SPACE_SIZE 0x00000200 #define VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL 0x00001000 diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index af1ffaf20892..8eaabfb20232 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2040,14 +2040,16 @@ static __init void nested_vmx_setup_ctls_msrs(void) */ /* pin-based controls */ + rdmsr(MSR_IA32_VMX_PINBASED_CTLS, + nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high); /* * According to the Intel spec, if bit 55 of VMX_BASIC is off (as it is * in our case), bits 1, 2 and 4 (i.e., 0x16) must be 1 in this MSR. */ - nested_vmx_pinbased_ctls_low = 0x16 ; - nested_vmx_pinbased_ctls_high = 0x16 | - PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING | - PIN_BASED_VIRTUAL_NMIS; + nested_vmx_pinbased_ctls_low |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR; + nested_vmx_pinbased_ctls_high &= PIN_BASED_EXT_INTR_MASK | + PIN_BASED_NMI_EXITING | PIN_BASED_VIRTUAL_NMIS; + nested_vmx_pinbased_ctls_high |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR; /* * Exit controls |