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ffa6482e46
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Chenyi Qiang ffa6482e46 x86/bus_lock: Don't assume the init value of DEBUGCTLMSR.BUS_LOCK_DETECT to be zero 
It's possible that this kernel has been kexec'd from a kernel that
enabled bus lock detection, or (hypothetically) BIOS/firmware has set
DEBUGCTLMSR_BUS_LOCK_DETECT.

Disable bus lock detection explicitly if not wanted.

Fixes: ebb1064e7c2e ("x86/traps: Handle #DB for bus lock")
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20220802033206.21333-1-chenyi.qiang@intel.com
2022-08-02 13:42:00 +02:00
..
alpha genirq: Add and use an irq_data_update_affinity helper 2022-07-07 09:38:04 +01:00
arc jump_label: make initial NOP patching the special case 2022-06-24 09:48:55 +02:00
arm Updates for interrupt core and drivers: 2022-08-01 12:48:15 -07:00
arm64 This was a fairly quiet cycle for the locking subsystem: 2022-08-01 12:15:27 -07:00
csky csky/tlb: Remove tlb_flush() define 2022-07-21 10:50:13 -07:00
hexagon
ia64 genirq: Add and use an irq_data_update_affinity helper 2022-07-07 09:38:04 +01:00
loongarch Updates for interrupt core and drivers: 2022-08-01 12:48:15 -07:00
m68k m68k: defconfig: Update defconfigs for v5.19-rc1 2022-07-12 10:48:21 +02:00
microblaze This set of changes updates init and user mode helper tasks to be 2022-06-03 16:03:05 -07:00
mips Updates for interrupt core and drivers: 2022-08-01 12:48:15 -07:00
nios2 This set of changes updates init and user mode helper tasks to be 2022-06-03 16:03:05 -07:00
openrisc openrisc: unwinder: Fix grammar issue in comment 2022-06-28 17:31:24 +09:00
parisc Updates for interrupt core and drivers: 2022-08-01 12:48:15 -07:00
powerpc powerpc fixes for 5.19 #6 2022-07-29 09:57:07 -07:00
riscv This was a fairly quiet cycle for the locking subsystem: 2022-08-01 12:15:27 -07:00
s390 This was a fairly quiet cycle for the locking subsystem: 2022-08-01 12:15:27 -07:00
sh Updates for interrupt core and drivers: 2022-08-01 12:48:15 -07:00
sparc This was a fairly quiet cycle for the locking subsystem: 2022-08-01 12:15:27 -07:00
um - Improve the check whether the kernel supports WP mappings so that it 2022-07-17 08:27:30 -07:00
x86 x86/bus_lock: Don't assume the init value of DEBUGCTLMSR.BUS_LOCK_DETECT to be zero 2022-08-02 13:42:00 +02:00
xtensa Updates for interrupt core and drivers: 2022-08-01 12:48:15 -07:00
.gitignore
Kconfig arm64 updates for 5.20 2022-08-01 10:37:00 -07:00