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ArmVirt/PlatformBootManagerLib: factor out IsVirtioPci() 

IsVirtioPciRng() becomes just a thin wrapper for IsVirtioPci().
This allows to add similar thin wrappers for other virtio
devices in the future.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Gerd Hoffmann 2023-06-01 13:57:12 +02:00 committed by mergify[bot]
parent a196b04926
commit aaf546879a
1 changed files with 23 additions and 7 deletions
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30
ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBm.c
View File

@ -313,15 +313,16 @@ IsVirtioRng (
}
/**
This FILTER_FUNCTION checks if a handle corresponds to a Virtio RNG device at
the EFI_PCI_IO_PROTOCOL level.
This function checks if a handle corresponds to the Virtio Device ID given
at the EFI_PCI_IO_PROTOCOL level.
**/
STATIC
BOOLEAN
EFIAPI
IsVirtioPciRng (
IsVirtioPci (
IN EFI_HANDLE Handle,
IN CONST CHAR16 *ReportText
IN CONST CHAR16 *ReportText,
IN UINT16 VirtIoDeviceId
)
{
EFI_STATUS Status;
@ -387,11 +388,11 @@ IsVirtioPciRng (
//
// From DeviceId and RevisionId, determine whether the device is a
// modern-only Virtio 1.0 device. In case of Virtio 1.0, DeviceId can
// immediately be restricted to VIRTIO_SUBSYSTEM_ENTROPY_SOURCE, and
// immediately be restricted to VirtIoDeviceId, and
// SubsystemId will only play a sanity-check role. Otherwise, DeviceId can
// only be sanity-checked, and SubsystemId will decide.
//
if ((DeviceId == 0x1040 + VIRTIO_SUBSYSTEM_ENTROPY_SOURCE) &&
if ((DeviceId == 0x1040 + VirtIoDeviceId) &&
(RevisionId >= 0x01))
{
Virtio10 = TRUE;
@ -419,7 +420,7 @@ IsVirtioPciRng (
return TRUE;
}
if (!Virtio10 && (SubsystemId == VIRTIO_SUBSYSTEM_ENTROPY_SOURCE)) {
if (!Virtio10 && (SubsystemId == VirtIoDeviceId)) {
return TRUE;
}
@ -430,6 +431,21 @@ PciError:
return FALSE;
}
/**
This FILTER_FUNCTION checks if a handle corresponds to a Virtio RNG device at
the EFI_PCI_IO_PROTOCOL level.
**/
STATIC
BOOLEAN
EFIAPI
IsVirtioPciRng (
IN EFI_HANDLE Handle,
IN CONST CHAR16 *ReportText
)
{
return IsVirtioPci (Handle, ReportText, VIRTIO_SUBSYSTEM_ENTROPY_SOURCE);
}
/**
This CALLBACK_FUNCTION attempts to connect a handle non-recursively, asking
the matching driver to produce all first-level child handles.