From be7a974babc311fe525d23a919970a23ca758a4a Mon Sep 17 00:00:00 2001 From: Xue Bosheng Date: Fri, 18 Sep 2026 13:08:52 +0800 Subject: [PATCH] OvmfPkg: skip dsm size zero value check for IGD Intel iGPU(MTL and MTL+) implement LMEM BAR, driver can access dsm through LEM BAR instead of DSM register, so dsm size == 0 is expected, current dsm size == 0 will break opregion init, so skip dsm size zero value check for IGD. Signed-off-by: Wang Yuan Signed-off-by: Xue Bosheng --- OvmfPkg/IgdAssignmentDxe/IgdAssignment.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/OvmfPkg/IgdAssignmentDxe/IgdAssignment.c b/OvmfPkg/IgdAssignmentDxe/IgdAssignment.c index 3b333ec6e7..3ee38c4d4b 100644 --- a/OvmfPkg/IgdAssignmentDxe/IgdAssignment.c +++ b/OvmfPkg/IgdAssignmentDxe/IgdAssignment.c @@ -542,7 +542,7 @@ IgdAssignmentEntry ( QemuFwCfgSelectItem (BdsmItem); QemuFwCfgReadBytes (BdsmItemSize, &BdsmSize); - if (BdsmSize == 0 || BdsmSize > MAX_UINTN) { + if (BdsmSize > MAX_UINTN) { DEBUG ((DEBUG_ERROR, "%a: %a: invalid value: %Lu\n", __FUNCTION__, ASSIGNED_IGD_FW_CFG_BDSM_SIZE, BdsmSize)); return EFI_PROTOCOL_ERROR; -- 2.34.1