linux-kernel - Re: [PATCH kvm-unit-tests 0/3] x86: Test rflags.rf clearing/setting

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Message-ID: <53CD06AC.1000408@redhat.com>
Date:	Mon, 21 Jul 2014 14:25:16 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Nadav Amit <namit@...technion.ac.il>
CC:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, gleb@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH kvm-unit-tests 0/3] x86: Test rflags.rf clearing/setting

Il 21/07/2014 13:39, Nadav Amit ha scritto:
> This series of patches introduces checks for rflags.rf and whether it is
> cleared after emulation, and set correctly.  The last (third) patch fails even
> with recent fixes, since there is no easy way for the hypervisor to determine
> whether any iteration of rep-string was executed before. RFLAGS.RF should be
> cleared before the first iteration, and set otherwise.
> 
> Nadav Amit (3):
>   x86: Check rflags.rf is cleared after emulation
>   x86: Test rflags.rf is set upon faults
>   x86: Check RFLAGS.RF on interrupt during REP-str
> 
>  lib/x86/desc.c | 14 +++++++++++---
>  lib/x86/desc.h |  1 +
>  x86/eventinj.c | 16 ++++++++++++++++
>  x86/idt_test.c | 13 +++++++++----
>  x86/realmode.c |  3 ++-
>  5 files changed, 39 insertions(+), 8 deletions(-)
> 

I applied patch 1.

Paolo
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