From: Andi Kleen <ak@linux.intel.com>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>
Subject: [PATCH] x86/mtrr: Check if fixed MTRRs exist before saving them
Date: Fri, 5 Jan 2024 08:37:11 -0800 [thread overview]
Message-ID: <20240105163711.9278-1-ak@linux.intel.com> (raw)
This one place forgot to check the fixed capability.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/mtrr/mtrr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.c b/arch/x86/kernel/cpu/mtrr/mtrr.c
index 767bf1c71aad..2a2fc14955cd 100644
--- a/arch/x86/kernel/cpu/mtrr/mtrr.c
+++ b/arch/x86/kernel/cpu/mtrr/mtrr.c
@@ -609,7 +609,7 @@ void mtrr_save_state(void)
{
int first_cpu;
- if (!mtrr_enabled())
+ if (!mtrr_enabled() || !mtrr_state.have_fixed)
return;
first_cpu = cpumask_first(cpu_online_mask);
--
2.43.0
next reply other threads:[~2024-01-05 16:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-05 16:37 Andi Kleen [this message]
2024-01-09 19:06 ` [PATCH] x86/mtrr: Check if fixed MTRRs exist before saving them Thomas Gleixner
2024-01-10 4:24 ` Andi Kleen
2024-01-10 14:20 ` Thomas Gleixner
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