From: Ingo Molnar <mingo@elte.hu>
To: Russ Anderson <rja@sgi.com>
Cc: tglx@linutronix.de, linux-kernel@vger.kernel.org,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 2/3] x86: Add UV memory protection bios call
Date: Wed, 22 Oct 2008 08:22:35 +0200 [thread overview]
Message-ID: <20081022062235.GD651@elte.hu> (raw)
In-Reply-To: <20081021200112.GD32545@sgi.com>
* Russ Anderson <rja@sgi.com> wrote:
> Add UV bios call to change memory protections.
>
> Signed-off-by: Russ Anderson <rja@sgi.com>
>
> ---
> arch/x86/kernel/bios_uv.c | 8 ++++++++
> include/asm-x86/uv/bios.h | 10 +++++++++-
> 2 files changed, 17 insertions(+), 1 deletion(-)
> - UV_BIOS_WATCHLIST_FREE
> + UV_BIOS_WATCHLIST_FREE,
> + UV_BIOS_MEMPROTECT
> +enum uv_memprotect {
> + UV_MEMPROT_RESTRICT_ACCESS,
> + UV_MEMPROT_ALLOW_AMO,
> + UV_MEMPROT_ALLOW_RW
hm, what does this do? Does it twiddle the southbridge to protect given
physical RAM rages from the CPU altogether?
Ingo
next prev parent reply other threads:[~2008-10-22 6:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 20:01 [PATCH 2/3] x86: Add UV memory protection bios call Russ Anderson
2008-10-22 6:22 ` Ingo Molnar [this message]
2008-10-22 14:40 ` Russ Anderson
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