UefiCpuPkg/CpuDxe: implement Mp Protocol:EnableDisableAP()
Due to the implementation of AcquireSpinLock() is not MP safe, so we should use AcquireSpinLockOrFail directly instead. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com> Reviewed-by: Jeff Fan <jeff.fan@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16357 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
@@ -202,6 +202,56 @@ GetProcessorInfo (
|
||||
OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
|
||||
);
|
||||
|
||||
/**
|
||||
This service lets the caller enable or disable an AP from this point onward.
|
||||
This service may only be called from the BSP.
|
||||
|
||||
This service allows the caller enable or disable an AP from this point onward.
|
||||
The caller can optionally specify the health status of the AP by Health. If
|
||||
an AP is being disabled, then the state of the disabled AP is implementation
|
||||
dependent. If an AP is enabled, then the implementation must guarantee that a
|
||||
complete initialization sequence is performed on the AP, so the AP is in a state
|
||||
that is compatible with an MP operating system. This service may not be supported
|
||||
after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.
|
||||
|
||||
If the enable or disable AP operation cannot be completed prior to the return
|
||||
from this service, then EFI_UNSUPPORTED must be returned.
|
||||
|
||||
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
|
||||
@param[in] ProcessorNumber The handle number of AP that is to become the new
|
||||
BSP. The range is from 0 to the total number of
|
||||
logical processors minus 1. The total number of
|
||||
logical processors can be retrieved by
|
||||
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
|
||||
@param[in] EnableAP Specifies the new state for the processor for
|
||||
enabled, FALSE for disabled.
|
||||
@param[in] HealthFlag If not NULL, a pointer to a value that specifies
|
||||
the new health status of the AP. This flag
|
||||
corresponds to StatusFlag defined in
|
||||
EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
|
||||
the PROCESSOR_HEALTH_STATUS_BIT is used. All other
|
||||
bits are ignored. If it is NULL, this parameter
|
||||
is ignored.
|
||||
|
||||
@retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
|
||||
@retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
|
||||
prior to this service returning.
|
||||
@retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
|
||||
@retval EFI_DEVICE_ERROR The calling processor is an AP.
|
||||
@retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
|
||||
does not exist.
|
||||
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
EnableDisableAP (
|
||||
IN EFI_MP_SERVICES_PROTOCOL *This,
|
||||
IN UINTN ProcessorNumber,
|
||||
IN BOOLEAN EnableAP,
|
||||
IN UINT32 *HealthFlag OPTIONAL
|
||||
);
|
||||
|
||||
/**
|
||||
This return the handle number for the calling processor. This service may be
|
||||
called from the BSP and APs.
|
||||
|
Reference in New Issue
Block a user