* [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault()
@ 2021-06-14 12:27 Gavin Shan
2021-06-14 15:42 ` Catalin Marinas
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Gavin Shan @ 2021-06-14 12:27 UTC (permalink / raw)
To: linux-arm-kernel
Cc: linux-kernel, catalin.marinas, will, mark.rutland, shan.gavin
Currently, the lower bits of fault address is cleared before it's
passed to handle_mm_fault(). It's unnecessary since generic code
does same thing since the commit 1a29d85eb0f19 ("mm: use vmf->address
instead of of vmf->virtual_address").
This passes the original fault address to handle_mm_fault() in case
the generic code needs to know the exact fault address.
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
arch/arm64/mm/fault.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 871c82ab0a30..e2883237216d 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -504,7 +504,7 @@ static vm_fault_t __do_page_fault(struct mm_struct *mm, unsigned long addr,
*/
if (!(vma->vm_flags & vm_flags))
return VM_FAULT_BADACCESS;
- return handle_mm_fault(vma, addr & PAGE_MASK, mm_flags, regs);
+ return handle_mm_fault(vma, addr, mm_flags, regs);
}
static bool is_el0_instruction_abort(unsigned int esr)
--
2.23.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault()
2021-06-14 12:27 [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault() Gavin Shan
@ 2021-06-14 15:42 ` Catalin Marinas
2021-06-15 11:11 ` Anshuman Khandual
2021-06-15 12:06 ` Will Deacon
2 siblings, 0 replies; 4+ messages in thread
From: Catalin Marinas @ 2021-06-14 15:42 UTC (permalink / raw)
To: Gavin Shan; +Cc: linux-arm-kernel, linux-kernel, will, mark.rutland, shan.gavin
On Mon, Jun 14, 2021 at 08:27:01PM +0800, Gavin Shan wrote:
> Currently, the lower bits of fault address is cleared before it's
> passed to handle_mm_fault(). It's unnecessary since generic code
> does same thing since the commit 1a29d85eb0f19 ("mm: use vmf->address
> instead of of vmf->virtual_address").
>
> This passes the original fault address to handle_mm_fault() in case
> the generic code needs to know the exact fault address.
>
> Signed-off-by: Gavin Shan <gshan@redhat.com>
> ---
> arch/arm64/mm/fault.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
> index 871c82ab0a30..e2883237216d 100644
> --- a/arch/arm64/mm/fault.c
> +++ b/arch/arm64/mm/fault.c
> @@ -504,7 +504,7 @@ static vm_fault_t __do_page_fault(struct mm_struct *mm, unsigned long addr,
> */
> if (!(vma->vm_flags & vm_flags))
> return VM_FAULT_BADACCESS;
> - return handle_mm_fault(vma, addr & PAGE_MASK, mm_flags, regs);
> + return handle_mm_fault(vma, addr, mm_flags, regs);
This seems to match most of the other architectures (arch/arm also masks
out the bottom bits). So:
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault()
2021-06-14 12:27 [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault() Gavin Shan
2021-06-14 15:42 ` Catalin Marinas
@ 2021-06-15 11:11 ` Anshuman Khandual
2021-06-15 12:06 ` Will Deacon
2 siblings, 0 replies; 4+ messages in thread
From: Anshuman Khandual @ 2021-06-15 11:11 UTC (permalink / raw)
To: Gavin Shan, linux-arm-kernel
Cc: linux-kernel, catalin.marinas, will, mark.rutland, shan.gavin
On 6/14/21 5:57 PM, Gavin Shan wrote:
> Currently, the lower bits of fault address is cleared before it's
> passed to handle_mm_fault(). It's unnecessary since generic code
> does same thing since the commit 1a29d85eb0f19 ("mm: use vmf->address
> instead of of vmf->virtual_address").
>
> This passes the original fault address to handle_mm_fault() in case
> the generic code needs to know the exact fault address.
>
> Signed-off-by: Gavin Shan <gshan@redhat.com>
> ---
> arch/arm64/mm/fault.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
> index 871c82ab0a30..e2883237216d 100644
> --- a/arch/arm64/mm/fault.c
> +++ b/arch/arm64/mm/fault.c
> @@ -504,7 +504,7 @@ static vm_fault_t __do_page_fault(struct mm_struct *mm, unsigned long addr,
> */
> if (!(vma->vm_flags & vm_flags))
> return VM_FAULT_BADACCESS;
> - return handle_mm_fault(vma, addr & PAGE_MASK, mm_flags, regs);
> + return handle_mm_fault(vma, addr, mm_flags, regs);
> }
>
> static bool is_el0_instruction_abort(unsigned int esr)
>
FWIW
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault()
2021-06-14 12:27 [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault() Gavin Shan
2021-06-14 15:42 ` Catalin Marinas
2021-06-15 11:11 ` Anshuman Khandual
@ 2021-06-15 12:06 ` Will Deacon
2 siblings, 0 replies; 4+ messages in thread
From: Will Deacon @ 2021-06-15 12:06 UTC (permalink / raw)
To: linux-arm-kernel, Gavin Shan
Cc: catalin.marinas, kernel-team, Will Deacon, linux-kernel,
shan.gavin, mark.rutland
On Mon, 14 Jun 2021 20:27:01 +0800, Gavin Shan wrote:
> Currently, the lower bits of fault address is cleared before it's
> passed to handle_mm_fault(). It's unnecessary since generic code
> does same thing since the commit 1a29d85eb0f19 ("mm: use vmf->address
> instead of of vmf->virtual_address").
>
> This passes the original fault address to handle_mm_fault() in case
> the generic code needs to know the exact fault address.
Applied to arm64 (for-next/mm), thanks!
[1/1] arm64: mm: Pass origial fault address to handle_mm_fault()
https://git.kernel.org/arm64/c/84c5e23edecd
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-06-15 12:07 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-14 12:27 [PATCH] arm64: mm: Pass origial fault address to handle_mm_fault() Gavin Shan
2021-06-14 15:42 ` Catalin Marinas
2021-06-15 11:11 ` Anshuman Khandual
2021-06-15 12:06 ` Will Deacon
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).