From 2a4a6242b71721024971df56d4f28e0aa63dd4d8 Mon Sep 17 00:00:00 2001 From: Anthony PERARD Date: Tue, 13 Aug 2019 12:30:59 +0100 Subject: OvmfPkg/AcpiPlatformDxe: Use Xen PVH RSDP if it exist If the firmware have been started via the Xen PVH entry point, a RSDP pointer would have been provided. Use it. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689 Signed-off-by: Anthony PERARD Reviewed-by: Laszlo Ersek Message-Id: <20190813113119.14804-16-anthony.perard@citrix.com> --- OvmfPkg/AcpiPlatformDxe/Xen.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'OvmfPkg/AcpiPlatformDxe') diff --git a/OvmfPkg/AcpiPlatformDxe/Xen.c b/OvmfPkg/AcpiPlatformDxe/Xen.c index 82794b933e..f80dfe1a57 100644 --- a/OvmfPkg/AcpiPlatformDxe/Xen.c +++ b/OvmfPkg/AcpiPlatformDxe/Xen.c @@ -36,10 +36,27 @@ GetXenAcpiRsdp ( EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr; UINT8 *XenAcpiPtr; UINT8 Sum; + EFI_XEN_INFO *XenInfo; // // Detect the RSDP structure // + + // + // First look for PVH one + // + XenInfo = XenGetInfoHOB (); + ASSERT (XenInfo != NULL); + if (XenInfo->RsdpPvh != NULL) { + DEBUG ((DEBUG_INFO, "%a: Use ACPI RSDP table at 0x%p\n", + gEfiCallerBaseName, XenInfo->RsdpPvh)); + *RsdpPtr = XenInfo->RsdpPvh; + return EFI_SUCCESS; + } + + // + // Otherwise, look for the HVM one + // for (XenAcpiPtr = (UINT8*)(UINTN) XEN_ACPI_PHYSICAL_ADDRESS; XenAcpiPtr < (UINT8*)(UINTN) XEN_BIOS_PHYSICAL_END; XenAcpiPtr += 0x10) { -- cgit v1.2.3