[PATCH v4 3/3] OvmfPkg/Bhyve: install ACPI tables from memory

["Corvin Köhne" <corvink@FreeBSD.org>]

It's much easier to create configuration dependend ACPI tables for bhyve
than for OVMF. For this reason, don't use the statically created ACPI
tables provided by OVMF. Instead prefer the dynamically created ACPI
tables of bhyve. If bhyve provides no ACPI tables or we are unable to
detect those, fall back to OVMF tables.

Ideally, we use the qemu fwcfg interface to pass the ACPI tables from
bhyve to OVMF. bhyve will support this in the future. However, current
bhyve executables don't support passing ACPI tables by the qemu fwcfg
interface. They just copy the ACPI into main memory. For that reason,
pick up the ACPI tables from main memory.

Signed-off-by: Corvin Köhne <corvink@FreeBSD.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Rebecca Cran <rebecca@bsdio.com>
Cc: Peter Grehan <grehan@freebsd.org>
---
 OvmfPkg/Bhyve/BhyveX64.dsc                    |  1 +
 .../Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf |  1 +
 OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatform.c  | 37 ++++++++++++++++++-
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/OvmfPkg/Bhyve/BhyveX64.dsc b/OvmfPkg/Bhyve/BhyveX64.dsc
index d0d2712c5662..465b81ffcd51 100644
--- a/OvmfPkg/Bhyve/BhyveX64.dsc
+++ b/OvmfPkg/Bhyve/BhyveX64.dsc
@@ -341,6 +341,7 @@ [LibraryClasses.common.UEFI_DRIVER]
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
 
 [LibraryClasses.common.DXE_DRIVER]
+  AcpiPlatformLib|OvmfPkg/Library/AcpiPlatformLib/DxeAcpiPlatformLib.inf
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
   HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf
   MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
diff --git a/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf b/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf
index 94c65f32dcab..75ed8e4a7deb 100644
--- a/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf
+++ b/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf
@@ -35,6 +35,7 @@ [Packages]
   UefiCpuPkg/UefiCpuPkg.dec
 
 [LibraryClasses]
+  AcpiPlatformLib
   BaseLib
   BaseMemoryLib
   BhyveFwCtlLib
diff --git a/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatform.c b/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatform.c
index 999e9f151ebb..1e1c90614ea1 100644
--- a/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatform.c
+++ b/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatform.c
@@ -10,6 +10,11 @@
 
 #include "AcpiPlatform.h"
 
+#include <Library/AcpiPlatformLib.h> // InstallAcpiTablesFromMemory()
+
+#define BHYVE_ACPI_PHYSICAL_ADDRESS  ((UINTN)0x000F2400)
+#define BHYVE_BIOS_PHYSICAL_END      ((UINTN)0x00100000)
+
 EFI_STATUS
 EFIAPI
 InstallAcpiTable (
@@ -241,7 +246,37 @@ InstallAcpiTables (
   IN   EFI_ACPI_TABLE_PROTOCOL  *AcpiTable
   )
 {
-  EFI_STATUS  Status;
+  EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER  *Rsdp;
+  EFI_STATUS                                    Status;
+
+  Status = GetAcpiRsdpFromMemory (
+             BHYVE_ACPI_PHYSICAL_ADDRESS,
+             BHYVE_BIOS_PHYSICAL_END,
+             &Rsdp
+             );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = InstallAcpiTablesFromRsdp (
+             AcpiTable,
+             Rsdp
+             );
+  if (!EFI_ERROR (Status)) {
+    return EFI_SUCCESS;
+  }
+
+  if (Status != EFI_NOT_FOUND) {
+    DEBUG (
+      (
+       DEBUG_WARN,
+       "%a: unable to install bhyve's ACPI tables (%r)\n",
+       __func__,
+       Status
+      )
+      );
+    return Status;
+  }
 
   Status = InstallOvmfFvTables (AcpiTable);
 
-- 
2.40.1