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A single change to verify the presence of fixed MTRR ranges before

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accessing the respective MSRs.
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Merge tag 'x86_mtrr_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull mtrr update from Borislav Petkov:
 "A single change to verify the presence of fixed MTRR ranges before
  accessing the respective MSRs"

* tag 'x86_mtrr_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mtrr: Check if fixed-range MTRRs exist in mtrr_save_fixed_ranges()
This commit is contained in:
Linus Torvalds 2025-05-27 10:17:03 -07:00
commit 350a604221
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/cpu/mtrr/generic.c
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@ -593,7 +593,7 @@ static void get_fixed_ranges(mtrr_type *frs)
void mtrr_save_fixed_ranges(void *info)
{
if (boot_cpu_has(X86_FEATURE_MTRR))
if (mtrr_state.have_fixed)
get_fixed_ranges(mtrr_state.fixed_ranges);
}