Re: [PATCH v7 20/36] x86, mpparse: Use memremap to map the mpf and mpc data

From: Borislav Petkov
Date: Wed Jun 21 2017 - 04:39:46 EST


On Fri, Jun 16, 2017 at 01:53:38PM -0500, Tom Lendacky wrote:
> The SMP MP-table is built by UEFI and placed in memory in a decrypted
> state. These tables are accessed using a mix of early_memremap(),
> early_memunmap(), phys_to_virt() and virt_to_phys(). Change all accesses
> to use early_memremap()/early_memunmap(). This allows for proper setting
> of the encryption mask so that the data can be successfully accessed when
> SME is active.
>
> Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
> ---
> arch/x86/kernel/mpparse.c | 98 ++++++++++++++++++++++++++++++++-------------
> 1 file changed, 70 insertions(+), 28 deletions(-)

Reviewed-by: Borislav Petkov <bp@xxxxxxx>

Please put the conversion to pr_fmt() on the TODO list for later.

Thanks.

--
Regards/Gruss,
Boris.

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