diff options
Diffstat (limited to 'OvmfPkg/OvmfPkg.dec')
| -rw-r--r-- | OvmfPkg/OvmfPkg.dec | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec index 26600dcf4..73db6af77 100644 --- a/OvmfPkg/OvmfPkg.dec +++ b/OvmfPkg/OvmfPkg.dec @@ -53,6 +53,17 @@ # to PIIX4 function 3 offset 0x40-0x43 bits [15:6].
gUefiOvmfPkgTokenSpaceGuid.PcdAcpiPmBaseAddress|0xB000|UINT16|5
+ ## When VirtioScsiDxe is instantiated for a HBA, the numbers of targets and
+ # LUNs are retrieved from the host during virtio-scsi setup.
+ # MdeModulePkg/Bus/Scsi/ScsiBusDxe then scans all MaxTarget * MaxLun
+ # possible devices. This can take extremely long, for example with
+ # MaxTarget=255 and MaxLun=16383. The *inclusive* constants below limit
+ # MaxTarget and MaxLun, independently, should the host report higher values,
+ # so that scanning the number of devices given by their product is still
+ # acceptably fast.
+ gUefiOvmfPkgTokenSpaceGuid.PcdVirtioScsiMaxTargetLimit|31|UINT16|6
+ gUefiOvmfPkgTokenSpaceGuid.PcdVirtioScsiMaxLunLimit|7|UINT32|7
+
[PcdsDynamic, PcdsDynamicEx]
gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
|