Messages in this thread | | | Date | Wed, 22 Oct 2008 08:22:35 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 2/3] x86: Add UV memory protection bios call |
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* 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
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