diff options
| author |   Sheng Yang <sheng@linux.intel.com> | 2010-06-30 12:25:15 +0800 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2010-08-01 10:47:21 +0300 |
| commit | f5f48ee15c2ee3e44cf429e34b16c6fa9b900246 (patch) | |
| tree | 75496197219d9aeedd3317fa007cc3b2e414c5da /arch/x86/include | |
| parent | KVM: Document KVM specific review items (diff) | |
| download | linux-dev-f5f48ee15c2ee3e44cf429e34b16c6fa9b900246.tar.xz linux-dev-f5f48ee15c2ee3e44cf429e34b16c6fa9b900246.zip | |
KVM: VMX: Execute WBINVD to keep data consistency with assigned devices
Some guest device driver may leverage the "Non-Snoop" I/O, and explicitly
WBINVD or CLFLUSH to a RAM space. Since migration may occur before WBINVD or
CLFLUSH, we need to maintain data consistency either by:
1: flushing cache (wbinvd) when the guest is scheduled out if there is no
wbinvd exit, or
2: execute wbinvd on all dirty physical CPUs when guest wbinvd exits.
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a57cdeacc4d2..2bda62485c4c 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -15,6 +15,7 @@ #include <linux/mm.h> #include <linux/mmu_notifier.h> #include <linux/tracepoint.h> +#include <linux/cpumask.h> #include <linux/kvm.h> #include <linux/kvm_para.h> @@ -358,6 +359,8 @@ struct kvm_vcpu_arch { /* fields used by HYPER-V emulation */ u64 hv_vapic; + + cpumask_var_t wbinvd_dirty_mask; }; struct kvm_arch { @@ -514,6 +517,8 @@ struct kvm_x86_ops { void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); + bool (*has_wbinvd_exit)(void); + const struct trace_print_flags *exit_reasons_str; }; @@ -571,6 +576,7 @@ void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); int kvm_emulate_halt(struct kvm_vcpu *vcpu); int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); int emulate_clts(struct kvm_vcpu *vcpu); +int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); |