Jiaqing Zhao 824c6384e8 x86/mtrr: Check if fixed-range MTRRs exist in mtrr_save_fixed_ranges() ... When suspending, save_processor_state() calls mtrr_save_fixed_ranges() to save fixed-range MTRRs. On platforms without fixed-range MTRRs like the ACRN hypervisor which has removed fixed-range MTRR emulation, accessing these MSRs will trigger an unchecked MSR access error. Make sure fixed-range MTRRs are supported before access to prevent such error. Since mtrr_state.have_fixed is only set when MTRRs are present and enabled, checking the CPU feature flag in mtrr_save_fixed_ranges() is unnecessary. Fixes: 3ebad59056 ("[PATCH] x86: Save and restore the fixed-range MTRRs of the BSP when suspending") Signed-off-by: Jiaqing Zhao <jiaqing.zhao@linux.intel.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/20250509170633.3411169-2-jiaqing.zhao@linux.intel.com		2025-05-12 13:04:40 +02:00
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amd.c	x86/mtrr: Replace vendor tests in MTRR code	2023-06-01 15:04:32 +02:00
centaur.c	x86/mtrr: Remove unused code	2023-06-01 15:04:33 +02:00
cleanup.c	x86/mtrr: Unify debugging printing	2023-06-01 15:04:33 +02:00
cyrix.c	x86/mtrr: Replace vendor tests in MTRR code	2023-06-01 15:04:32 +02:00
generic.c	x86/mtrr: Check if fixed-range MTRRs exist in mtrr_save_fixed_ranges()	2025-05-12 13:04:40 +02:00
if.c	x86/mtrr: Remove unnecessary strlen() in mtrr_write()	2025-02-25 20:50:55 +01:00
legacy.c	x86/mtrr: Allocate mtrr_value array dynamically	2023-06-01 15:04:33 +02:00
Makefile	x86/mtrr: Move 32-bit code from mtrr.c to legacy.c	2023-06-01 15:04:33 +02:00
mtrr.c	x86/mtrr: Rename mtrr_overwrite_state() to guest_force_mtrr_state()	2024-12-04 10:46:19 -08:00
mtrr.h	x86/mtrr: Unify debugging printing	2023-06-01 15:04:33 +02:00