Hi Yoshinoya,
The MP Services UEFI protocol has been used to run the CPUID instructions on a given CPU core and to read / write the MSRs from given CPU core.
The python functions for this purpose are supported from the edk2module built in extension module are respectively
cpuid_ex, rdmsr_ex/ wrmsr_ex with the function signatures as given below.
cupid_ex has the following signature cpuid_ex(cpu, eax, ecx) -> (eax:ebx:ecx:edx)
rdmsr_ex(cpu, msr) -> (lower_32bits, higher_32bits)
wrmsr_ex(cpu, msr, lower_32bits, higher_32bits) -> None
where the
cpu parameter refers to the cpu core number starting from 0, 0 being BSP.
The usage instructions and code sample are not yet updated in the wiki. I can add more details at the earliest.
Please use the edk2-libc discussions page for any further questions / discussions.
https://github.com/tianocore/edk2-libc/discussions
Regards,
JP
From: Yoshinoya <yoshinoyatoko@163.com>
Sent: Monday, February 17, 2025 4:43 PM
To: devel@edk2.groups.io; Jayaprakash, N <n.jayaprakash@intel.com>
Cc: Kinney, Michael D <michael.d.kinney@intel.com>; pedro.falcato@gmail.com
Subject: Re:Re: [edk2-devel] Python-3.6.8 UEFI : fork support
hi, JP
Got it, thank you!
I found some uefi mp service functions's call sample in edk2module.c
So, user could follow this sample and write multi process sample with python script ?
best wishes,
At 2025-02-17 13:23:58, "Jayaprakash, N via groups.io" <n.jayaprakash=intel.com@groups.io> wrote:
Hi Yoshinoya,
ItĄ¯s not supported in UEFI.
You can see that macros are not defined as part of pyconfig.h
https://github.com/tianocore/edk2-libc/blob/master/AppPkg/Applications/Python/Python-3.6.8/PyMod-3.6.8/Include/pyconfig.h
So this functionality doesnĄ¯t get compiled for UEFI.
Regards,
JP
I am studying Python368 uefi code.
I have a question, ask for help.
I found some marco defines in edk2module.c
"HAVE_FORK / HAVE_FORK1 / HAVE_SPAWNV / etc"
It seems about multi-thread support functions,
1. Have these functions been tested on uefi shell environments?
2. Are there any code samples for study how to use them?