[edk2-devel] [PATCH v3 15/35] OvmfPkg/AcpiPlatformDxe: Use Xen PVH RSDP if it exist

[Anthony PERARD]

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 at citrix.com>
---

Notes:
    v3:
    - patch splited from the previous one
    - Fix DEBUG format string, use %p for pointers.
      and use gEfiCallerBaseName to print module name

 OvmfPkg/AcpiPlatformDxe/Xen.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/OvmfPkg/AcpiPlatformDxe/Xen.c b/OvmfPkg/AcpiPlatformDxe/Xen.c
index 82794b933e..376a6bd3cb 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) {

-- 
Anthony PERARD


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.

View/Reply Online (#43293): https://edk2.groups.io/g/devel/message/43293
Mute This Topic: https://groups.io/mt/32308713/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub  [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-