From: Paolo Bonzini <pbonzini@redhat.com>
To: Vitaly Kuznetsov <vkuznets@redhat.com>, kvm@vger.kernel.org
Cc: Sean Christopherson <seanjc@google.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Siddharth Chandrasekaran <sidcha@amazon.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/4] KVM: x86: hyper-v: Check if guest is allowed to use XMM registers for hypercall input
Date: Tue, 3 Aug 2021 12:10:31 +0200 [thread overview]
Message-ID: <44b5e202-7c38-db93-25c7-c91a0ba7eb65@redhat.com> (raw)
In-Reply-To: <20210730122625.112848-1-vkuznets@redhat.com>
On 30/07/21 14:26, Vitaly Kuznetsov wrote:
> "KVM: x86: hyper-v: Fine-grained access check to Hyper-V hypercalls and
> MSRs" and "Add support for XMM fast hypercalls" series were developed
> at the same time so the later landed without a proper feature bit check
> for 'strict' (KVM_CAP_HYPERV_ENFORCE_CPUID) mode. Add it now.
>
> TLFS states that "Availability of the XMM fast hypercall interface is
> indicated via the “Hypervisor Feature Identification” CPUID Leaf
> (0x40000003, see section 2.4.4) ... Any attempt to use this interface
> when the hypervisor does not indicate availability will result in a #UD
> fault."
>
> Vitaly Kuznetsov (4):
> KVM: x86: hyper-v: Check access to hypercall before reading XMM
> registers
> KVM: x86: Introduce trace_kvm_hv_hypercall_done()
> KVM: x86: hyper-v: Check if guest is allowed to use XMM registers for
> hypercall input
> KVM: selftests: Test access to XMM fast hypercalls
>
> arch/x86/kvm/hyperv.c | 18 ++++++--
> arch/x86/kvm/trace.h | 15 +++++++
> .../selftests/kvm/include/x86_64/hyperv.h | 5 ++-
> .../selftests/kvm/x86_64/hyperv_features.c | 41 +++++++++++++++++--
> 4 files changed, 71 insertions(+), 8 deletions(-)
>
Queued, thanks.
Paolo
next prev parent reply other threads:[~2021-08-03 10:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 12:26 [PATCH 0/4] KVM: x86: hyper-v: Check if guest is allowed to use XMM registers for hypercall input Vitaly Kuznetsov
2021-07-30 12:26 ` [PATCH 1/4] KVM: x86: hyper-v: Check access to hypercall before reading XMM registers Vitaly Kuznetsov
2021-07-30 14:29 ` Siddharth Chandrasekaran
2021-07-30 12:26 ` [PATCH 2/4] KVM: x86: Introduce trace_kvm_hv_hypercall_done() Vitaly Kuznetsov
2021-07-30 14:30 ` Siddharth Chandrasekaran
2021-07-30 12:26 ` [PATCH 3/4] KVM: x86: hyper-v: Check if guest is allowed to use XMM registers for hypercall input Vitaly Kuznetsov
2021-07-30 14:30 ` Siddharth Chandrasekaran
2021-07-30 12:26 ` [PATCH 4/4] KVM: selftests: Test access to XMM fast hypercalls Vitaly Kuznetsov
2021-07-30 14:35 ` Siddharth Chandrasekaran
2021-07-30 14:50 ` Vitaly Kuznetsov
2021-07-30 15:01 ` Siddharth Chandrasekaran
2021-08-03 10:10 ` Paolo Bonzini
2021-08-03 10:10 ` Paolo Bonzini [this message]
2021-08-03 10:17 ` [PATCH 0/4] KVM: x86: hyper-v: Check if guest is allowed to use XMM registers for hypercall input Paolo Bonzini
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