linux-kernel - Re: [PATCH 0/6] KVM: x86: More emulator bugs

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Date:	Mon, 16 Jun 2014 12:18:46 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Nadav Amit <namit@...technion.ac.il>
CC:	gleb@...nel.org, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, x86@...nel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] KVM: x86: More emulator bugs

Il 15/06/2014 15:12, Nadav Amit ha scritto:
> This patch-set resolves several emulator bugs. Each fix is independent of the
> others.  The DR6/7 bug can occur during DR-access exit (regardless to
> unrestricted mode, MMIO and SPT).
>
> Thanks for reviewing the patches,
> Nadav
>
> Nadav Amit (6):
>   KVM: x86: bit-ops emulation ignores offset on 64-bit
>   KVM: x86: Wrong emulation on 'xadd X, X'
>   KVM: x86: Inter privilage level ret emulation is not implemeneted
>   KVM: x86: emulation of dword cmov on long-mode should clear [63:32]
>   KVM: x86: NOP emulation clears (incorrectly) the high 32-bits of RAX
>   KVM: x86: check DR6/7 high-bits are clear only on long-mode
>
>  arch/x86/kvm/emulate.c | 31 ++++++++++++++++++++-----------
>  arch/x86/kvm/x86.c     | 13 +++++++++++--
>  2 files changed, 31 insertions(+), 13 deletions(-)
>

I applied these locally.  Can you prepare testcases for patches 1, 2, 4 
and 5?  Perhaps patch 6 too if it's easy to reproduce.

Paolo
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