]> www.infradead.org Git - users/jedix/linux-maple.git/commit
x86/sev: Add missing RIP_REL_REF() invocations during sme_enable()
authorKevin Loughlin <kevinloughlin@google.com>
Fri, 22 Nov 2024 20:23:22 +0000 (20:23 +0000)
committerIngo Molnar <mingo@kernel.org>
Thu, 27 Feb 2025 22:01:33 +0000 (23:01 +0100)
commit72dafb567760320f2de7447cd6e979bf9d4e5d17
treefaf3f96eb34d0718e1ed7f9608696a0d00dbcf67
parentd082ecbc71e9e0bf49883ee4afd435a77a5101b6
x86/sev: Add missing RIP_REL_REF() invocations during sme_enable()

The following commit:

  1c811d403afd ("x86/sev: Fix position dependent variable references in startup code")

introduced RIP_REL_REF() to force RIP-relative accesses to global variables,
as needed to prevent crashes during early SEV/SME startup code.

For completeness, RIP_REL_REF() should be used with additional variables during
sme_enable():

  https://lore.kernel.org/all/CAMj1kXHnA0fJu6zh634=fbJswp59kSRAbhW+ubDGj1+NYwZJ-Q@mail.gmail.com/

Access these vars with RIP_REL_REF() to prevent problem reoccurence.

Fixes: 1c811d403afd ("x86/sev: Fix position dependent variable references in startup code")
Signed-off-by: Kevin Loughlin <kevinloughlin@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/r/20241122202322.977678-1-kevinloughlin@google.com
arch/x86/mm/mem_encrypt_identity.c