From: "Radim Krčmář" <rkrcmar@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
Wanpeng Li <wanpeng.li@linux.intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
stable@vger.kernel.org, "H. Peter Anvin" <hpa@linux.intel.com>
Subject: Re: [PATCH 2/9] KVM: x86: support XSAVES usage in the host
Date: Thu, 4 Dec 2014 18:56:02 +0100 [thread overview]
Message-ID: <20141204175602.GA18653@potion.brq.redhat.com> (raw)
In-Reply-To: <1417708634-24333-3-git-send-email-pbonzini@redhat.com>
2014-12-04 16:57+0100, Paolo Bonzini:
> Userspace is expecting non-compacted format for KVM_GET_XSAVE, but
> struct xsave_struct might be using the compacted format. Convert
> in order to preserve userspace ABI.
>
> Likewise, userspace is passing non-compacted format for KVM_SET_XSAVE
> but the kernel will pass it to XRSTORS, and we need to convert back.
>
> Fixes: f31a9f7c71691569359fa7fb8b0acaa44bce0324
> Cc: Fenghua Yu <fenghua.yu@intel.com>
> Cc: stable@vger.kernel.org
> Cc: H. Peter Anvin <hpa@linux.intel.com>
> Reported-by: Nadav Amit <namit@cs.technion.ac.il>
> Tested-by: Nadav Amit <namit@cs.technion.ac.il>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
> +++ b/arch/x86/kvm/x86.c
> @@ -3132,15 +3132,89 @@ static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
> + u64 xstate_bv = xsave->xsave_hdr.xstate_bv;
(This looks like the only change since last review.)
next prev parent reply other threads:[~2014-12-04 17:56 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-04 15:57 [PATCH 0/9] Final set of XSAVES patches Paolo Bonzini
2014-12-04 15:57 ` [PATCH 1/9] x86: export get_xsave_addr Paolo Bonzini
2014-12-04 16:34 ` Greg KH
2014-12-04 17:29 ` Paolo Bonzini
2014-12-04 15:57 ` [PATCH 2/9] KVM: x86: support XSAVES usage in the host Paolo Bonzini
2014-12-04 17:56 ` Radim Krčmář [this message]
2014-12-04 15:57 ` [PATCH 3/9] KVM: x86: use F() macro throughout cpuid.c Paolo Bonzini
2014-12-04 15:57 ` [PATCH 4/9] kvm: x86: Add kvm_x86_ops hook that enables XSAVES for guest Paolo Bonzini
2014-12-05 13:32 ` Radim Krčmář
2014-12-04 15:57 ` [PATCH 5/9] KVM: cpuid: set CPUID(EAX=0xd,ECX=1).EBX correctly Paolo Bonzini
2014-12-05 0:40 ` Wanpeng Li
2014-12-04 15:57 ` [PATCH 6/9] KVM: cpuid: mask more bits in leaf 0xd and subleaves Paolo Bonzini
2014-12-05 0:34 ` Wanpeng Li
2014-12-05 1:20 ` Wanpeng Li
2014-12-04 15:57 ` [PATCH 7/9] kvm: x86: handle XSAVES vmcs and vmexit Paolo Bonzini
2014-12-04 18:06 ` Radim Krčmář
2014-12-04 15:57 ` [PATCH 8/9] kvm: vmx: add MSR logic for XSAVES Paolo Bonzini
2014-12-04 18:05 ` Radim Krčmář
2014-12-04 18:07 ` Radim Krčmář
2014-12-04 15:57 ` [PATCH 9/9] kvm: vmx: add nested virtualization support for xsaves Paolo Bonzini
2014-12-04 18:08 ` Radim Krčmář
2014-12-05 1:15 ` [PATCH 0/9] Final set of XSAVES patches Wanpeng Li
2014-12-05 7:27 ` Paolo Bonzini
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