linux-kernel - [PATCH v3 0/2] x86/mm/sme: fix the kdump kernel breakage on SME system when CONFIG_IMA

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Message-ID: <20240911081615.262202-1-bhe@redhat.com>
Date: Wed, 11 Sep 2024 16:16:13 +0800
From: Baoquan He <bhe@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: thomas.lendacky@....com,
	dyoung@...hat.com,
	daniel.kiper@...cle.com,
	noodles@...com,
	lijiang@...hat.com,
	kexec@...ts.infradead.org,
	x86@...nel.org,
	Baoquan He <bhe@...hat.com>
Subject: [PATCH v3 0/2] x86/mm/sme: fix the kdump kernel breakage on SME system when CONFIG_IMA_KEXEC=y

Currently, distros like Fedora/RHEL have enabled CONFIG_IMA_KEXEC by
default. This makes kexec/kdump kernel always fail to boot up on SME
platform because of a code bug. By debugging, the root cause is found
out and bug is fixed with this patchset.

Changelog:
v2->v3:
=======
- Add how the miscaculation is caused into patch 2 log according to
  Tom's suggestion.
- Add Tom's tag.

v1->v2:
=======
- Add patch 1 to clean up the confusing local varibale naming because
  people may mix up the local variable 'size' with the passed in parameter
  in function early_memremap_is_setup_data(). Suggested by Dave and Tom
  during v1 patch reviewing.

Baoquan He (2):
  x86/mm: rename the confusing local variable in
    early_memremap_is_setup_data()
  x86/mm/sme: fix the kdump kernel breakage on SME system when
    CONFIG_IMA_KEXEC=y

 arch/x86/mm/ioremap.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

-- 
2.41.0