From: Ashish Kalra <Ashish.Kalra@amd.com>
To: <linux-tip-commits@vger.kernel.org>
Cc: <bp@alien8.de>, <thomas.lendacky@amd.com>, <michael.roth@amd.com>,
<x86@kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 0/2] Apply RMP table fixups for kexec.
Date: Mon, 15 Apr 2024 21:08:56 +0000 [thread overview]
Message-ID: <cover.1713212104.git.ashish.kalra@amd.com> (raw)
From: Ashish Kalra <ashish.kalra@amd.com>
Handle cases where the RMP table placement in the BIOS is
not 2M aligned and then the kexec kernel could try to allocate
from within that chunk and that causes a fatal RMP fault.
Check if RMP table start & end physical range in e820_table
is not aligned to 2MB and in that case use e820__range_update()
to map this range to reserved.
The callback to apply these RMP table fixups needs to be called
after the e820 tables are setup/populated and before the e820 map
has been converted to the standard Linux memory resources and e820 map
is no longer used and modifying it has no effect.
v2:
- Remove overriding e820__memory_setup_default() to invoke
snp_rmptable_e820_fixup() to apply the RMP table fixups.
- This callback snp_rmptable_e820_fixup() is now invoked
after e820__memory_setup() and before e820__reserve_resources().
- Expose e820 API interfaces to update e820_table_kexec and
e820_table_firmware externally.
- snp_rmptable_e820_fixup() now calls these new external API
interfaces to update e820_table_kexec and e820_table_firmware.
Ashish Kalra (2):
x86/e820: Expose API to update e820 kexec and firmware tables
externally.
x86/sev: Add callback to apply RMP table fixups for kexec.
arch/x86/include/asm/e820/api.h | 3 +++
arch/x86/include/asm/sev.h | 2 ++
arch/x86/kernel/e820.c | 7 +++++-
arch/x86/mm/mem_encrypt.c | 3 +++
arch/x86/virt/svm/sev.c | 44 +++++++++++++++++++++++++++++++++
5 files changed, 58 insertions(+), 1 deletion(-)
--
2.34.1
next reply other threads:[~2024-04-15 21:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-15 21:08 Ashish Kalra [this message]
2024-04-15 21:09 ` [PATCH v2 1/2] x86/e820: Expose API to update e820 kexec and firmware tables externally Ashish Kalra
2024-04-20 11:20 ` Borislav Petkov
2024-04-15 21:09 ` [PATCH v2 2/2] x86/sev: Add callback to apply RMP table fixups for kexec Ashish Kalra
2024-04-20 13:05 ` Borislav Petkov
2024-04-24 23:48 ` Kalra, Ashish
2024-04-26 12:58 ` Borislav Petkov
2024-04-26 14:56 ` Kalra, Ashish
2024-04-20 11:08 ` [PATCH v2 0/2] Apply " Borislav Petkov
2024-04-24 19:10 ` Kalra, Ashish
2024-04-26 12:49 ` Borislav Petkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=cover.1713212104.git.ashish.kalra@amd.com \
--to=ashish.kalra@amd.com \
--cc=bp@alien8.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=michael.roth@amd.com \
--cc=thomas.lendacky@amd.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).