| Message ID | 20200429093634.1514902-6-vkuznets@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: x86: Interrupt-based mechanism for async_pf 'page present' notifications | expand |
On Wed, Apr 29, 2020 at 11:36:33AM +0200, Vitaly Kuznetsov wrote: > Introduce new capability to indicate that KVM supports interrupt based > delivery of type 2 APF events (page ready notifications). This includes > support for both MSR_KVM_ASYNC_PF2 and MSR_KVM_ASYNC_PF_ACK. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> > --- > Documentation/virt/kvm/cpuid.rst | 6 ++++++ > arch/x86/include/uapi/asm/kvm_para.h | 1 + > arch/x86/kvm/cpuid.c | 3 ++- > arch/x86/kvm/x86.c | 1 + > include/uapi/linux/kvm.h | 1 + > 5 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/Documentation/virt/kvm/cpuid.rst b/Documentation/virt/kvm/cpuid.rst > index 01b081f6e7ea..5383d68e3217 100644 > --- a/Documentation/virt/kvm/cpuid.rst > +++ b/Documentation/virt/kvm/cpuid.rst > @@ -86,6 +86,12 @@ KVM_FEATURE_PV_SCHED_YIELD 13 guest checks this feature bit > before using paravirtualized > sched yield. > > +KVM_FEATURE_PV_SCHED_YIELD 14 guest checks this feature bit Copy/paste fail > + before using the second async > + pf control msr 0x4b564d06 and > + async pf acknowledgment msr > + 0x4b564d07. > +
diff --git a/Documentation/virt/kvm/cpuid.rst b/Documentation/virt/kvm/cpuid.rst index 01b081f6e7ea..5383d68e3217 100644 --- a/Documentation/virt/kvm/cpuid.rst +++ b/Documentation/virt/kvm/cpuid.rst @@ -86,6 +86,12 @@ KVM_FEATURE_PV_SCHED_YIELD 13 guest checks this feature bit before using paravirtualized sched yield. +KVM_FEATURE_PV_SCHED_YIELD 14 guest checks this feature bit + before using the second async + pf control msr 0x4b564d06 and + async pf acknowledgment msr + 0x4b564d07. + KVM_FEATURE_CLOCSOURCE_STABLE_BIT 24 host will warn if no guest-side per-cpu warps are expeced in kvmclock diff --git a/arch/x86/include/uapi/asm/kvm_para.h b/arch/x86/include/uapi/asm/kvm_para.h index 5c7449980619..b4560f60fb05 100644 --- a/arch/x86/include/uapi/asm/kvm_para.h +++ b/arch/x86/include/uapi/asm/kvm_para.h @@ -31,6 +31,7 @@ #define KVM_FEATURE_PV_SEND_IPI 11 #define KVM_FEATURE_POLL_CONTROL 12 #define KVM_FEATURE_PV_SCHED_YIELD 13 +#define KVM_FEATURE_ASYNC_PF_INT 14 #define KVM_HINTS_REALTIME 0 diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 901cd1fdecd9..790fe4988001 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -712,7 +712,8 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) (1 << KVM_FEATURE_ASYNC_PF_VMEXIT) | (1 << KVM_FEATURE_PV_SEND_IPI) | (1 << KVM_FEATURE_POLL_CONTROL) | - (1 << KVM_FEATURE_PV_SCHED_YIELD); + (1 << KVM_FEATURE_PV_SCHED_YIELD) | + (1 << KVM_FEATURE_ASYNC_PF_INT); if (sched_info_on()) entry->eax |= (1 << KVM_FEATURE_STEAL_TIME); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e3b91ac33bfd..b1ee01fdf671 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3413,6 +3413,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_X86_ROBUST_SINGLESTEP: case KVM_CAP_XSAVE: case KVM_CAP_ASYNC_PF: + case KVM_CAP_ASYNC_PF_INT: case KVM_CAP_GET_TSC_KHZ: case KVM_CAP_KVMCLOCK_CTRL: case KVM_CAP_READONLY_MEM: diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 428c7dde6b4b..15012f78a691 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1017,6 +1017,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_S390_VCPU_RESETS 179 #define KVM_CAP_S390_PROTECTED 180 #define KVM_CAP_PPC_SECURE_GUEST 181 +#define KVM_CAP_ASYNC_PF_INT 182 #ifdef KVM_CAP_IRQ_ROUTING
Introduce new capability to indicate that KVM supports interrupt based delivery of type 2 APF events (page ready notifications). This includes support for both MSR_KVM_ASYNC_PF2 and MSR_KVM_ASYNC_PF_ACK. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- Documentation/virt/kvm/cpuid.rst | 6 ++++++ arch/x86/include/uapi/asm/kvm_para.h | 1 + arch/x86/kvm/cpuid.c | 3 ++- arch/x86/kvm/x86.c | 1 + include/uapi/linux/kvm.h | 1 + 5 files changed, 11 insertions(+), 1 deletion(-)