lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:	Wed, 20 Jun 2007 10:47:24 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Luca Tettamanti <kronos.it@...il.com>
CC:	kvm-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] kvm: Fix x86 emulator writeback

Luca Tettamanti wrote:
> When the old value and new one are the same the emulator skips the
> write; this is undesiderable when the destination is a MMIO area and the
> write shall be performed regardless of the previous value. This
> optimization breaks e.g. a Linux guest APIC compiled without
> X86_GOOD_APIC.
>
> Remove the check and perform the writeback stage in the emulation unless
> it's explicitly disabled (currently push and some 2 bytes instructions
> may disable the writeback).
>
>   

Applied both, thanks.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists