mirror of
https://github.com/torvalds/linux.git
synced 2024-12-01 00:21:32 +00:00
5a4f55cde8
cpuid_maxphyaddr(), which performs lot of memory accesses is called extensively across KVM, especially in nVMX code. This patch adds a cached value of maxphyaddr to vcpu.arch to reduce the pressure onto CPU cache and simplify the code of cpuid_maxphyaddr() callers. The cached value is initialized in kvm_arch_vcpu_init() and reloaded every time CPUID is updated by usermode. It is obvious that these reloads occur infrequently. Signed-off-by: Eugene Korenevsky <ekorenevsky@gmail.com> Message-Id: <20150329205612.GA1223@gnote> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
#ifndef ARCH_X86_KVM_CPUID_H
|
|
#define ARCH_X86_KVM_CPUID_H
|
|
|
|
#include "x86.h"
|
|
|
|
int kvm_update_cpuid(struct kvm_vcpu *vcpu);
|
|
struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
|
|
u32 function, u32 index);
|
|
int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
|
|
struct kvm_cpuid_entry2 __user *entries,
|
|
unsigned int type);
|
|
int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
|
|
struct kvm_cpuid *cpuid,
|
|
struct kvm_cpuid_entry __user *entries);
|
|
int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
|
|
struct kvm_cpuid2 *cpuid,
|
|
struct kvm_cpuid_entry2 __user *entries);
|
|
int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
|
|
struct kvm_cpuid2 *cpuid,
|
|
struct kvm_cpuid_entry2 __user *entries);
|
|
void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx);
|
|
|
|
int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu);
|
|
|
|
static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.maxphyaddr;
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
if (!static_cpu_has(X86_FEATURE_XSAVE))
|
|
return false;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 1, 0);
|
|
return best && (best->ecx & bit(X86_FEATURE_XSAVE));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_tsc_adjust(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 7, 0);
|
|
return best && (best->ebx & bit(X86_FEATURE_TSC_ADJUST));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 7, 0);
|
|
return best && (best->ebx & bit(X86_FEATURE_SMEP));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_smap(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 7, 0);
|
|
return best && (best->ebx & bit(X86_FEATURE_SMAP));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 7, 0);
|
|
return best && (best->ebx & bit(X86_FEATURE_FSGSBASE));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_osvw(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
|
|
return best && (best->ecx & bit(X86_FEATURE_OSVW));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_pcid(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 1, 0);
|
|
return best && (best->ecx & bit(X86_FEATURE_PCID));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_x2apic(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 1, 0);
|
|
return best && (best->ecx & bit(X86_FEATURE_X2APIC));
|
|
}
|
|
|
|
static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 0, 0);
|
|
return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_gbpages(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
|
|
return best && (best->edx & bit(X86_FEATURE_GBPAGES));
|
|
}
|
|
|
|
static inline bool guest_cpuid_has_rtm(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_cpuid_entry2 *best;
|
|
|
|
best = kvm_find_cpuid_entry(vcpu, 7, 0);
|
|
return best && (best->ebx & bit(X86_FEATURE_RTM));
|
|
}
|
|
#endif
|