From: Avi Kivity <avi@qumranet.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, kvm@vger.kernel.org
Subject: Re: [PATCH] extboot: don't use interrupt vectors $0x2b and $0x2c
Date: Tue, 22 Jul 2008 10:31:42 +0300 [thread overview]
Message-ID: <48858CDE.3020205@qumranet.com> (raw)
In-Reply-To: <1216405379-5550-1-git-send-email-hpa@zytor.com>
H. Peter Anvin wrote:
> extboot's use of interrupt vectors $0x2b and $0x2c is unsafe, as these
> interrupt vectors fall in the OS-use range (0x20-0x3f). Furthermore,
> it's unnecessary: we can keep a local pointer instead of hooking
> another interrupt as long as we can write to our own segment.
>
> Make the extboot segment writable, and use local variables to hold the
> old link pointers.
>
> If this turns out to cause problems, we should probably switch to
> using vectors in the 0xc0-0xef range, and/or other BIOS-reserved
> memory.
>
>
Applied, thanks (as two patches).
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
prev parent reply other threads:[~2008-07-22 7:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-18 18:22 [PATCH] extboot: don't use interrupt vectors $0x2b and $0x2c H. Peter Anvin
2008-07-22 7:31 ` Avi Kivity [this message]
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