From: Matt Fleming <matt@codeblueprint.co.uk>
To: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
jlee@suse.com, bp@alien8.de, ricardo.neri@intel.com,
ard.biesheuvel@linaro.org, ravi.v.shankar@intel.com,
fenghua.yu@intel.com
Subject: Re: [PATCH 0/4] UEFI: EFI_MEMORY_ATTRIBUTES_TABLE support for x86
Date: Wed, 7 Dec 2016 13:56:46 +0000 [thread overview]
Message-ID: <20161207135646.GC17720@codeblueprint.co.uk> (raw)
In-Reply-To: <1481051763-8705-1-git-send-email-sai.praneeth.prakhya@intel.com>
On Tue, 06 Dec, at 11:15:59AM, Sai Praneeth Prakhya wrote:
> From: Sai Praneeth <sai.praneeth.prakhya@intel.com>
>
> UEFI v2.6 introduces EFI_MEMORY_ATTRIBUTES_TABLE which describes memory
> protections that may be applied to EFI Runtime code and data regions by
> kernel. This helps kernel to map efi runtime regions more strictly and
> hence allowing only appropriate accesses to these regions. Please refer
> to "EFI_MEMORY_ATTRIBUTES_TABLE" in section 4.6 of UEFI specification
> v2.6 for more information on this table.
>
> This patch set relies on commit a604af075a32 ("efi: Add support for the
> EFI_MEMORY_ATTRIBUTES_TABLE config table"), commit 10f0d2f57705 ("efi:
> Implement generic support for the Memory Attributes table") and hence
> implements support for only x86.
>
> Since the above commits have already implemented early discovery and
> validation of table, the following patches implement a call back
> function for x86 which is called only when EFI_MEMORY_ATTRIBUTES_TABLE
> is detected.
>
> Patch #1 makes the efi_memory_attributes table detection code generic
> across all architectures
>
> Patch #2 adds EFI_MEM_ATTR bit to keep track of this feature
>
> Patch #3 Implements call back function that does stricter mappings based
> on this table
>
> Patch #4 Skip parsing of EFI_PROPERTIES_TABLE if EFI_MEMORY_ATTRIBUTES_TABLE
> is detected
>
> Sai Praneeth (4):
> efi: Make EFI_MEMORY_ATTRIBUTES_TABLE initialization common across all
> architectures
> efi: Introduce EFI_MEM_ATTR bit and set it from memory attributes
> table
> x86/efi: Add support for EFI_MEMORY_ATTRIBUTES_TABLE
> efi: Skip parsing of EFI_PROPERTIES_TABLE if
> EFI_MEMORY_ATTRIBUTES_TABLE is detected
>
> arch/x86/platform/efi/efi_64.c | 64 ++++++++++++++++++++++++++++++++++-------
> drivers/firmware/efi/arm-init.c | 1 -
> drivers/firmware/efi/efi.c | 13 +++++++++
> drivers/firmware/efi/memattr.c | 6 +++-
> include/linux/efi.h | 1 +
> 5 files changed, 73 insertions(+), 12 deletions(-)
Thanks Sai, I've queued this up for v4.11.
next prev parent reply other threads:[~2016-12-07 13:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 19:15 [PATCH 0/4] UEFI: EFI_MEMORY_ATTRIBUTES_TABLE support for x86 Sai Praneeth Prakhya
2016-12-06 19:16 ` [PATCH 1/4] efi: Make EFI_MEMORY_ATTRIBUTES_TABLE initialization common across all architectures Sai Praneeth Prakhya
2016-12-07 13:28 ` Matt Fleming
2016-12-06 19:16 ` [PATCH 2/4] efi: Introduce EFI_MEM_ATTR bit and set it from memory attributes table Sai Praneeth Prakhya
2016-12-06 19:16 ` [PATCH 3/4] x86/efi: Add support for EFI_MEMORY_ATTRIBUTES_TABLE Sai Praneeth Prakhya
2016-12-06 19:16 ` [PATCH 4/4] efi: Skip parsing of EFI_PROPERTIES_TABLE if EFI_MEMORY_ATTRIBUTES_TABLE is detected Sai Praneeth Prakhya
2016-12-07 13:36 ` Matt Fleming
2016-12-07 13:26 ` [PATCH 0/4] UEFI: EFI_MEMORY_ATTRIBUTES_TABLE support for x86 Matt Fleming
2016-12-07 13:56 ` Matt Fleming [this message]
2016-12-07 19:01 ` Sai Praneeth Prakhya
2016-12-07 20:04 ` Matt Fleming
2016-12-07 20:13 ` Sai Praneeth Prakhya
2016-12-13 6:47 ` joeyli
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