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Revert "drivers/intel/fsp2_0: Allow `mp_startup_all_cpus()` to run serially" 

This reverts commit 6af980a2ae.

BUG=b:199246420
Change-Id: Iddb7aa6d52b563485a496798f2fe31ed64b4f4a8
Signed-off-by: Ronak Kanabar <ronak.kanabar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61498
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
This commit is contained in:
Ronak Kanabar 2022-01-31 11:22:45 +05:30 committed by Felix Held
parent a4b821a9af
commit 40ca79714a
1 changed files with 4 additions and 17 deletions
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21
src/drivers/intel/fsp2_0/ppi/mp_service_ppi.c
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@ -94,23 +94,10 @@ efi_return_status_t mp_startup_all_cpus(efi_ap_procedure procedure,
/* Run on BSP */
procedure(argument);
/*
* Run on APs Serially
*
* FIXME: As per MP service specification, EDK2 is allowed to specify the mode
* in which a 'func' routine should be executed on APs (i.e. execute serially
* or concurrently).
*
* MP service API `StartupAllCPUs` doesn't specify such requirement.
* Hence, running the `CpuCacheInfoCollectCoreAndCacheData`
* (UefiCpuPkg/Library/CpuCacheInfoLib/CpuCacheInfoLib.c#194)
* simultaneously on APs results in a coherency issue (hang while executing `func`)
* due to lack of acquiring a spin lock while accessing common data structure in
* multiprocessor environment.
*/
if (mp_run_on_all_aps((void *)procedure, argument, timeout_usec, false) !=
CB_SUCCESS) {
printk(BIOS_DEBUG, "%s: Exit with Failure\n", __func__);
/* Run on APs */
if (mp_run_on_aps((void *)procedure, argument,
MP_RUN_ON_ALL_CPUS, timeout_usec) != CB_SUCCESS) {
printk(BIOS_ERR, "%s: Exit with Failure\n", __func__);
return FSP_NOT_STARTED;
}