linux-kernel - [PATCH 0/2] Fixes for recent x86/boot rip-relative addressing changes

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Date: Fri, 22 Mar 2024 10:41:05 -0500
From: Tom Lendacky <thomas.lendacky@....com>
To: <linux-kernel@...r.kernel.org>, <x86@...nel.org>
CC: Borislav Petkov <bp@...en8.de>, Thomas Gleixner <tglx@...utronix.de>, Ingo
 Molnar <mingo@...hat.com>, Dave Hansen <dave.hansen@...ux.intel.com>, Ard
 Biesheuvel <ardb@...nel.org>
Subject: [PATCH 0/2] Fixes for recent x86/boot rip-relative addressing changes

This patch series provides fixes for the recent x86/boot rip-relative
addressing changes that causes system crashes when booting with 5-level
pagetables and SME active.

I thought I had tested 5-level paging with SME, but must have missed
it. There are two patches to fix the issues that can be squashed into
a single patch with multiple Fixes: tags if desired.

The second patch is sort of a revert, but instead uses the newer
RIP_REL_REF() macro instead of reverting the fix and continuing to use
the fixup_pointer() support.

---

Patches based on:
  https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git master
  30052fd948a3 ("Merge branch into tip/master: 'x86/shstk'")

Tom Lendacky (2):
  x86/boot/64: Apply encryption mask to 5-level pagetable update
  x86/boot/64: Move 5-level paging global variable assignments back

 arch/x86/kernel/head64.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

-- 
2.43.2