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| author | Anthony PERARD <anthony.perard@citrix.com> | 2019-08-13 12:30:59 +0100 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2019-08-21 18:03:49 +0200 |
| commit | 2a4a6242b71721024971df56d4f28e0aa63dd4d8 (patch) | |
| tree | 4e1df10bd670d5e79fd349cc620fb729566f0e44 /OvmfPkg/AcpiPlatformDxe | |
| parent | 3afa2ed53fe0878ae205d62bba962a0463d41260 (diff) | |
| download | edk2-2a4a6242b71721024971df56d4f28e0aa63dd4d8.tar.gz edk2-2a4a6242b71721024971df56d4f28e0aa63dd4d8.tar.bz2 edk2-2a4a6242b71721024971df56d4f28e0aa63dd4d8.zip | |
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 <anthony.perard@citrix.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20190813113119.14804-16-anthony.perard@citrix.com>
Diffstat (limited to 'OvmfPkg/AcpiPlatformDxe')
| -rw-r--r-- | OvmfPkg/AcpiPlatformDxe/Xen.c | 17 |
1 files changed, 17 insertions, 0 deletions
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) {
|