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From: Peter Zijlstra <peterz@infradead.org>
To: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: x86@kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
	Andy Lutomirski <luto@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>
Subject: Re: [PATCH RFC 5/6] KVM: x86: announce KVM_FEATURE_ASYNC_PF_INT
Date: Wed, 29 Apr 2020 12:40:57 +0200	[thread overview]
Message-ID: <20200429104057.GL13592@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200429093634.1514902-6-vkuznets@redhat.com>

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.
> +

  reply	other threads:[~2020-04-29 10:41 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-29  9:36 [PATCH RFC 0/6] KVM: x86: Interrupt-based mechanism for async_pf 'page present' notifications Vitaly Kuznetsov
2020-04-29  9:36 ` [PATCH RFC 1/6] Revert "KVM: async_pf: Fix #DF due to inject "Page not Present" and "Page Ready" exceptions simultaneously" Vitaly Kuznetsov
2020-05-05  1:22   ` Gavin Shan
2020-05-05 14:16   ` Vivek Goyal
2020-05-06 15:17     ` Vitaly Kuznetsov
2020-05-11 19:17       ` Vivek Goyal
2020-04-29  9:36 ` [PATCH RFC 2/6] KVM: x86: extend struct kvm_vcpu_pv_apf_data with token info Vitaly Kuznetsov
2020-05-04 23:52   ` Gavin Shan
2020-05-05  8:08     ` Vitaly Kuznetsov
2020-04-29  9:36 ` [PATCH RFC 3/6] KVM: x86: interrupt based APF page-ready event delivery Vitaly Kuznetsov
2020-04-29 10:54   ` Paolo Bonzini
2020-04-29 12:40     ` Vitaly Kuznetsov
2020-04-29 13:21       ` Paolo Bonzini
2020-04-29 21:27   ` Peter Xu
2020-04-30  8:31     ` Vitaly Kuznetsov
2020-04-30 13:28       ` Peter Xu
2020-04-30 13:49         ` Vitaly Kuznetsov
2020-05-05 15:22   ` Vivek Goyal
2020-04-29  9:36 ` [PATCH RFC 4/6] KVM: x86: acknowledgment mechanism for async pf page ready notifications Vitaly Kuznetsov
2020-04-29 17:28   ` Andy Lutomirski
2020-04-29 17:40     ` Paolo Bonzini
2020-04-30  0:45       ` Andy Lutomirski
2020-04-30  6:46         ` Paolo Bonzini
2020-04-30  6:49   ` Paolo Bonzini
2020-04-30  8:40     ` Vitaly Kuznetsov
2020-04-30  9:27       ` Paolo Bonzini
2020-04-30 11:33         ` Vitaly Kuznetsov
2020-04-30 11:43           ` Paolo Bonzini
2020-05-05  0:36   ` Gavin Shan
2020-05-05  8:16     ` Vitaly Kuznetsov
2020-05-05  8:51       ` Gavin Shan
2020-05-05  9:54         ` Paolo Bonzini
2020-04-29  9:36 ` [PATCH RFC 5/6] KVM: x86: announce KVM_FEATURE_ASYNC_PF_INT Vitaly Kuznetsov
2020-04-29 10:40   ` Peter Zijlstra [this message]
2020-04-29  9:36 ` [PATCH RFC 6/6] KVM: x86: Switch KVM guest to using interrupts for page ready APF delivery Vitaly Kuznetsov
2020-04-29 10:53   ` Paolo Bonzini
2020-04-29 12:44     ` Vitaly Kuznetsov
2020-04-29 13:19       ` Paolo Bonzini
2020-04-29 14:34         ` Vitaly Kuznetsov
2020-05-05 18:59     ` Vivek Goyal
2020-05-05  0:42   ` Gavin Shan

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