On 3/1/24 03:54, Zhou Jianfeng wrote:
> Add volatile qualifier to page table related variable to prevent
> compiler from optimizing away the variables which may lead to
> unexpected result.
>
> Signed-off-by: Zhou Jianfeng
> Cc: Ray Ni
> Cc: Laszlo Ersek
> Cc: Rahul Kumar
> Cc: Gerd Hoffmann
On 3/1/24 03:54, Zhou Jianfeng wrote:
> Add volatile qualifier to page table related variable to prevent
> compiler from optimizing away the variables which may lead to
> unexpected result.
>
> Signed-off-by: Zhou Jianfeng
> Cc: Ray Ni
> Cc: Laszlo Ersek
> Cc: Rahul Kumar
> Cc: Gerd Hoffmann
Reviewed-by: Michael Brown
Thanks,
Michael
On 01/03/2024 02:54, Zhou Jianfeng wrote:
Add volatile qualifier to page table related variable to prevent
compiler from optimizing away the variables which may lead to
unexpected result.
Signed-off-by: Zhou Jianfeng
Cc: Ray Ni
Cc: Laszlo Ersek
Add volatile qualifier to page table related variable to prevent
compiler from optimizing away the variables which may lead to
unexpected result.
Signed-off-by: Zhou Jianfeng
Cc: Ray Ni
Cc: Laszlo Ersek
Cc: Rahul Kumar
Cc: Gerd Hoffmann
Cc: Pedro Falcato
Cc: Zhang Di
Cc: Tan Dun
Cc:
Dun
Subject: Re: [edk2-devel] [PATCH] UefiCpuPkg/CpuPageTableLib: qualify page
table accesses as volatile
On 22/02/2024 08:41, Zhou Jianfeng wrote:
> --- a/UefiCpuPkg/Library/CpuPageTableLib/CpuPageTableMap.c
> +++ b/UefiCpuPkg/Library/CpuPageTableLib/CpuPageTableMap.c
> @@ -20,13 +20,
On 2/23/24 16:51, Michael Brown wrote:
> On 23/02/2024 15:12, Zhou, Jianfeng wrote:
>>> While it may well cause the compiler to generate less optimised code,
>>> there is absolutely no way that this volatile declaration on a local
>>> stack variable can possibly change the outcome of the code.
>>>
On 23/02/2024 15:12, Zhou, Jianfeng wrote:
While it may well cause the compiler to generate less optimised code, there is
absolutely no way that this volatile declaration on a local stack variable can
possibly change the outcome of the code.
There can never be any meaningful side-effects from
On 22/02/2024 08:41, Zhou Jianfeng wrote:
--- a/UefiCpuPkg/Library/CpuPageTableLib/CpuPageTableMap.c
+++ b/UefiCpuPkg/Library/CpuPageTableLib/CpuPageTableMap.c
@@ -20,13 +20,13 @@
**/
VOID
PageTableLibSetPte4K (
- IN OUT IA32_PTE_4K *Pte4K,
- IN UINT64 Offset,
-
Add volatile qualifier to page table related variable to prevent
compiler from optimizing away the variables which may lead to
unexpected result.
Signed-off-by: Zhou Jianfeng
Cc: Ray Ni
Cc: Laszlo Ersek
Cc: Rahul Kumar
Cc: Gerd Hoffmann
Cc: Pedro Falcato
Cc: Zhang Di
Cc: Tan Dun
---
