2023-07-11 09:40:19

by Anshuman Khandual

Subject: [PATCH] arm64/mm: Replace an open coding with ID_AA64MMFR1_EL1_HAFDBS_MASK

Replace '0xf' with ID_AA64MMFR1_EL1_HAFDBS_MASK while evaluating if the cpu
supports implicit page table entry access flag update in HW.

Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
---
This applies on 6.5-rc1

arch/arm64/mm/proc.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 2baeec419f62..14fdf645edc8 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -447,7 +447,7 @@ SYM_FUNC_START(__cpu_setup)
* via capabilities.
*/
mrs x9, ID_AA64MMFR1_EL1
- and x9, x9, #0xf
+ and x9, x9, ID_AA64MMFR1_EL1_HAFDBS_MASK
cbz x9, 1f
orr tcr, tcr, #TCR_HA // hardware Access flag update
1:
--
2.30.2

2023-07-27 12:26:38

by Will Deacon

Subject: Re: [PATCH] arm64/mm: Replace an open coding with ID_AA64MMFR1_EL1_HAFDBS_MASK

On Tue, 11 Jul 2023 14:34:58 +0530, Anshuman Khandual wrote:
> Replace '0xf' with ID_AA64MMFR1_EL1_HAFDBS_MASK while evaluating if the cpu
> supports implicit page table entry access flag update in HW.
>
>

Applied to arm64 (for-next/mm), thanks!

[1/1] arm64/mm: Replace an open coding with ID_AA64MMFR1_EL1_HAFDBS_MASK
https://git.kernel.org/arm64/c/d0999555e306

Cheers,
--
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev