[edk2-devel] [PATCH v1 0/1] Avoid EFI memory alloc from SP_MEMORY

[edk2-devel] [PATCH v1 0/1] Avoid EFI memory alloc from SP_MEMORY

[Dhaval Sharma]

Most of the times it is desirable not to use special purpose
memory for regular edk2 usages. That memory (HBm/CXL) are
either meant for special purposes or are less reliable to
be used. So avoid using them as long as possible. We could
also introduce PCD for this control.

https://github.com/tianocore/edk2/pull/5760

Dhaval (1):
  MdeModulePkg: Avoid efi memory allocation for SP type

 MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
 1 file changed, 7 insertions(+)

-- 
2.40.1



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[edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory allocation for SP type

[Dhaval Sharma]

Most of the times it is desirable not to use special purpose
memory for regular edk2 usages. That memory (HBm/CXL) are
either meant for special purposes or are less reliable to
be used. So avoid using them as long as possible. We could
also introduce PCD for this control.

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
---
 MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index 5a51d9df1a29..e4daa741b971 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -1183,6 +1183,13 @@ CoreFindFreePagesI (
       continue;
     }
 
+    //
+    // Don't allocate out of Special-Purpose memory.
+    //
+    if ((Entry->Attribute & EFI_MEMORY_SP) != 0) {
+      continue;
+    }
+
     DescStart = Entry->Start;
     DescEnd   = Entry->End;
 
-- 
2.40.1



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Re: [edk2-devel] [PATCH v1 0/1] Avoid EFI memory alloc from SP_MEMORY

[Oliver Smith-Denny]

On 6/10/2024 9:09 PM, Dhaval Sharma wrote:
> Most of the times it is desirable not to use special purpose
> memory for regular edk2 usages. That memory (HBm/CXL) are
> either meant for special purposes or are less reliable to
> be used. So avoid using them as long as possible. We could
> also introduce PCD for this control.
> 
> https://github.com/tianocore/edk2/pull/5760
> 
> Dhaval (1):
>    MdeModulePkg: Avoid efi memory allocation for SP type
> 
>   MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
>   1 file changed, 7 insertions(+)
> 

In case you missed it, edk2 has moved to a PR process for
patches now: 
https://github.com/tianocore/tianocore.github.io/wiki/EDK-II-Development-Process.

I have left a comment on your PR, thanks.

Oliver


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回复: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory allocation for SP type

[gaoliming via groups.io]

Can you create pull request for this change? I will add my review for it. 

> -----邮件原件-----
> 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Dhaval Sharma
> 发送时间: 2024年6月11日 12:09
> 收件人: devel@edk2.groups.io
> 抄送: Liming Gao <gaoliming@byosoft.com.cn>
> 主题: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory
allocation
> for SP type
> 
> Most of the times it is desirable not to use special purpose
> memory for regular edk2 usages. That memory (HBm/CXL) are
> either meant for special purposes or are less reliable to
> be used. So avoid using them as long as possible. We could
> also introduce PCD for this control.
> 
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
> ---
>  MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c
> b/MdeModulePkg/Core/Dxe/Mem/Page.c
> index 5a51d9df1a29..e4daa741b971 100644
> --- a/MdeModulePkg/Core/Dxe/Mem/Page.c
> +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
> @@ -1183,6 +1183,13 @@ CoreFindFreePagesI (
>        continue;
> 
>      }
> 
> 
> 
> +    //
> 
> +    // Don't allocate out of Special-Purpose memory.
> 
> +    //
> 
> +    if ((Entry->Attribute & EFI_MEMORY_SP) != 0) {
> 
> +      continue;
> 
> +    }
> 
> +
> 
>      DescStart = Entry->Start;
> 
>      DescEnd   = Entry->End;
> 
> 
> 
> --
> 2.40.1
> 
> 
> 
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> [gaoliming@byosoft.com.cn]
> -=-=-=-=-=-=
> 





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Re: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory allocation for SP type

[Michael D Kinney]

Liming,

It is here, but needs some commit message updates

https://github.com/tianocore/edk2/pull/5760

Mike

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of gaoliming via
> groups.io
> Sent: Friday, June 14, 2024 8:05 PM
> To: devel@edk2.groups.io; dhaval@rivosinc.com
> Subject: 回复: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory
> allocation for SP type
> 
> Can you create pull request for this change? I will add my review for it.
> 
> > -----邮件原件-----
> > 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Dhaval Sharma
> > 发送时间: 2024年6月11日 12:09
> > 收件人: devel@edk2.groups.io
> > 抄送: Liming Gao <gaoliming@byosoft.com.cn>
> > 主题: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory
> allocation
> > for SP type
> >
> > Most of the times it is desirable not to use special purpose
> > memory for regular edk2 usages. That memory (HBm/CXL) are
> > either meant for special purposes or are less reliable to
> > be used. So avoid using them as long as possible. We could
> > also introduce PCD for this control.
> >
> > Cc: Liming Gao <gaoliming@byosoft.com.cn>
> > Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
> > ---
> >  MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
> >  1 file changed, 7 insertions(+)
> >
> > diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c
> > b/MdeModulePkg/Core/Dxe/Mem/Page.c
> > index 5a51d9df1a29..e4daa741b971 100644
> > --- a/MdeModulePkg/Core/Dxe/Mem/Page.c
> > +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
> > @@ -1183,6 +1183,13 @@ CoreFindFreePagesI (
> >        continue;
> >
> >      }
> >
> >
> >
> > +    //
> >
> > +    // Don't allocate out of Special-Purpose memory.
> >
> > +    //
> >
> > +    if ((Entry->Attribute & EFI_MEMORY_SP) != 0) {
> >
> > +      continue;
> >
> > +    }
> >
> > +
> >
> >      DescStart = Entry->Start;
> >
> >      DescEnd   = Entry->End;
> >
> >
> >
> > --
> > 2.40.1
> >
> >
> >
> > -=-=-=-=-=-=
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> > View/Reply Online (#119545): https://edk2.groups.io/g/devel/message/119545
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> > Unsubscribe: https://edk2.groups.io/g/devel/unsub
> > [gaoliming@byosoft.com.cn]
> > -=-=-=-=-=-=
> >
> 
> 
> 
> 
> 
> 
> 



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Re: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory allocation for SP type

[Dhaval Sharma]

[-- Attachment #1: Type: text/plain, Size: 3198 bytes --]

I already sent out an update yesterday. PTAL when you get a chance. Thanks!

On Sat, Jun 15, 2024 at 10:24 AM Kinney, Michael D <
michael.d.kinney@intel.com> wrote:

> Liming,
>
> It is here, but needs some commit message updates
>
> https://github.com/tianocore/edk2/pull/5760
>
> Mike
>
> > -----Original Message-----
> > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of
> gaoliming via
> > groups.io
> > Sent: Friday, June 14, 2024 8:05 PM
> > To: devel@edk2.groups.io; dhaval@rivosinc.com
> > Subject: 回复: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory
> > allocation for SP type
> >
> > Can you create pull request for this change? I will add my review for it.
> >
> > > -----邮件原件-----
> > > 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Dhaval Sharma
> > > 发送时间: 2024年6月11日 12:09
> > > 收件人: devel@edk2.groups.io
> > > 抄送: Liming Gao <gaoliming@byosoft.com.cn>
> > > 主题: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory
> > allocation
> > > for SP type
> > >
> > > Most of the times it is desirable not to use special purpose
> > > memory for regular edk2 usages. That memory (HBm/CXL) are
> > > either meant for special purposes or are less reliable to
> > > be used. So avoid using them as long as possible. We could
> > > also introduce PCD for this control.
> > >
> > > Cc: Liming Gao <gaoliming@byosoft.com.cn>
> > > Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
> > > ---
> > >  MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > >
> > > diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c
> > > b/MdeModulePkg/Core/Dxe/Mem/Page.c
> > > index 5a51d9df1a29..e4daa741b971 100644
> > > --- a/MdeModulePkg/Core/Dxe/Mem/Page.c
> > > +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
> > > @@ -1183,6 +1183,13 @@ CoreFindFreePagesI (
> > >        continue;
> > >
> > >      }
> > >
> > >
> > >
> > > +    //
> > >
> > > +    // Don't allocate out of Special-Purpose memory.
> > >
> > > +    //
> > >
> > > +    if ((Entry->Attribute & EFI_MEMORY_SP) != 0) {
> > >
> > > +      continue;
> > >
> > > +    }
> > >
> > > +
> > >
> > >      DescStart = Entry->Start;
> > >
> > >      DescEnd   = Entry->End;
> > >
> > >
> > >
> > > --
> > > 2.40.1
> > >
> > >
> > >
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> > > [gaoliming@byosoft.com.cn]
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> > >
> >
> >
> >
> >
> >
> > 
> >
>
>

-- 
Thanks!
=D


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