Remove FP Init in UPL Entry

[edk2-devel] [PATCH v1 0/1] Remove FP Init in UPL Entry

Posted by Dhaval Sharma 1 year, 1 month ago

Remove floating point initialization from UPL entry point

Cc: Gua guo <gua.guo@intel.com>
Dhaval Sharma (1):
  UefiPayloadPkg: Remove FP Init from UPL entryfunc

 UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry.c | 3 ---
 1 file changed, 3 deletions(-)

-- 
2.40.0.rc0.57.g454dfcbddf



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Re: [edk2-devel] [PATCH v1 0/1] Remove FP Init in UPL Entry

Posted by Guo, Gua 1 year, 1 month ago

What's the issue you encounter ?

-----Original Message-----
From: Dhaval Sharma <dhaval@rivosinc.com> 
Sent: Friday, March 3, 2023 2:12 AM
To: devel@edk2.groups.io
Cc: Guo, Gua <gua.guo@intel.com>
Subject: [PATCH v1 0/1] Remove FP Init in UPL Entry

Remove floating point initialization from UPL entry point

Cc: Gua guo <gua.guo@intel.com>
Dhaval Sharma (1):
  UefiPayloadPkg: Remove FP Init from UPL entryfunc

 UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry.c | 3 ---
 1 file changed, 3 deletions(-)

-- 
2.40.0.rc0.57.g454dfcbddf



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Re: [edk2-devel] [PATCH v1 0/1] Remove FP Init in UPL Entry

Posted by Dhaval Sharma 1 year, 1 month ago

On Fri, Mar 3, 2023 at 6:05 AM Guo, Gua <gua.guo@intel.com> wrote:

> What's the issue you encounter ?
>
I will add this context in the next patchset. But primarily I am enabling
UPL for RiscV and during the process I found a few sequences which I
believe are arch specific and showing up in the common boot path.
While RV has a similar FP enabling concept, in my understanding this
enabling is required to automate (HW based) FP save/restore during process
context switches at OS runtime. Also OS (at least I confirmed
with Linux) have their own enabling process for FP. And I do not see any
instance in UPL/BDS that is making use of this feature. Also it appears
that UPL spec suggests BL performs this step.

>
> -----Original Message-----
> From: Dhaval Sharma <dhaval@rivosinc.com>
> Sent: Friday, March 3, 2023 2:12 AM
> To: devel@edk2.groups.io
> Cc: Guo, Gua <gua.guo@intel.com>
> Subject: [PATCH v1 0/1] Remove FP Init in UPL Entry
>
> Remove floating point initialization from UPL entry point
>
> Cc: Gua guo <gua.guo@intel.com>
> Dhaval Sharma (1):
>   UefiPayloadPkg: Remove FP Init from UPL entryfunc
>
>  UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry.c | 3 ---
>  1 file changed, 3 deletions(-)
>
> --
> 2.40.0.rc0.57.g454dfcbddf
>
>

-- 
Thanks!
=D


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