-----Original Message-----
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Corvin
Köhne
Sent: Friday, April 8, 2022 1:53 PM
Cc: Corvin Köhne <CorvinK@...>; Köhne, Corvin
<c.koehne@...>; Ard Biesheuvel <ardb+tianocore@...>; Yao,
Jiewen <jiewen.yao@...>; Justen, Jordan L <jordan.l.justen@...>;
devel@edk2.groups.io; FreeBSD Virtualization <freebsd-
virtualization@...>; Gerd Hoffmann <kraxel@...>; Rebecca
Cran <rebecca@...>; Peter Grehan <grehan@...>
Subject: [edk2-devel] [PATCH v3] OvmfPkg/BhyveBhfPkg: add support for
QemuFwCfg

From: Corvin Köhne <CorvinK@...>

QemuFwCfg is much more powerful than BhyveFwCtl. Sadly, BhyveFwCtl
decided to use the same IO ports as QemuFwCfg. It's not possible to use
both interfaces simultaneously. So, prefer QemuFwCfg over BhyveFwCtl.

Signed-off-by: Corvin Köhne <c.koehne@...>
Acked-by: Gerd Hoffmann <kraxel@...>
Acked-by: Rebecca Cran <rebecca@...>
Acked-by: Peter Grehan <grehan@...>
CC: Ard Biesheuvel <ardb+tianocore@...>
CC: Jiewen Yao <jiewen.yao@...>
CC: Jordan Justen <jordan.l.justen@...>
CC: devel@edk2.groups.io
CC: FreeBSD Virtualization <freebsd-virtualization@...>
---
OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf | 1 +
OvmfPkg/Bhyve/AcpiPlatformDxe/Bhyve.c | 41 ++++++++++++++++++++-
--
OvmfPkg/Bhyve/BhyveX64.dsc | 4 +--
3 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf
b/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf
index 595fd055f9..94c65f32dc 100644
--- a/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf
+++ b/OvmfPkg/Bhyve/AcpiPlatformDxe/AcpiPlatformDxe.inf
@@ -43,6 +43,7 @@
MemoryAllocationLib
OrderedCollectionLib
PcdLib
+ QemuFwCfgLib
UefiBootServicesTableLib
UefiDriverEntryPoint
UefiLib
diff --git a/OvmfPkg/Bhyve/AcpiPlatformDxe/Bhyve.c
b/OvmfPkg/Bhyve/AcpiPlatformDxe/Bhyve.c
index 8e80aa33e1..e216a21bfa 100644
--- a/OvmfPkg/Bhyve/AcpiPlatformDxe/Bhyve.c
+++ b/OvmfPkg/Bhyve/AcpiPlatformDxe/Bhyve.c
@@ -11,6 +11,41 @@
#include <Library/BaseMemoryLib.h>
#include <Library/BhyveFwCtlLib.h>
#include <Library/MemoryAllocationLib.h>
+#include <Library/QemuFwCfgLib.h> // QemuFwCfgFindFile()
+
+STATIC
+EFI_STATUS
+EFIAPI
+BhyveGetCpuCount (
+ OUT UINT32 *CpuCount
+ )
+{
+ FIRMWARE_CONFIG_ITEM Item;
+ UINTN Size;
+
+ if (QemuFwCfgIsAvailable ()) {
+ if (EFI_ERROR (QemuFwCfgFindFile ("opt/bhyve/hw.ncpu", &Item, &Size))) {
+ return EFI_NOT_FOUND;
+ } else if (Size != sizeof (*CpuCount)) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ QemuFwCfgSelectItem (Item);
+ QemuFwCfgReadBytes (Size, CpuCount);
+
+ return EFI_SUCCESS;
+ }
+
+ //
+ // QemuFwCfg not available, try BhyveFwCtl.
+ //
+ Size = sizeof (*CpuCount);
+ if (BhyveFwCtlGet ("hw.ncpu", CpuCount, &Size) == RETURN_SUCCESS) {
+ return EFI_SUCCESS;
+ }
+
+ return EFI_UNSUPPORTED;
+}

STATIC
EFI_STATUS
@@ -23,7 +58,6 @@ BhyveInstallAcpiMadtTable (
)
{
UINT32 CpuCount;
- UINTN cSize;
UINTN NewBufferSize;
EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER *Madt;
EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE *LocalApic;
@@ -36,9 +70,8 @@ BhyveInstallAcpiMadtTable (
ASSERT (AcpiTableBufferSize >= sizeof (EFI_ACPI_DESCRIPTION_HEADER));

// Query the host for the number of vCPUs
- CpuCount = 0;
- cSize = sizeof (CpuCount);
- if (BhyveFwCtlGet ("hw.ncpu", &CpuCount, &cSize) == RETURN_SUCCESS) {
+ Status = BhyveGetCpuCount (&CpuCount);
+ if (!EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "Retrieved CpuCount %d\n", CpuCount));
ASSERT (CpuCount >= 1);
} else {
diff --git a/OvmfPkg/Bhyve/BhyveX64.dsc b/OvmfPkg/Bhyve/BhyveX64.dsc
index 5fa08bebd7..14070fd6dd 100644
--- a/OvmfPkg/Bhyve/BhyveX64.dsc
+++ b/OvmfPkg/Bhyve/BhyveX64.dsc
@@ -163,8 +163,7 @@

SecurityManagementLib|MdeModulePkg/Library/DxeSecurityManagementLib/D
xeSecurityManagementLib.inf
UefiUsbLib|MdePkg/Library/UefiUsbLib/UefiUsbLib.inf

SerializeVariablesLib|OvmfPkg/Library/SerializeVariablesLib/SerializeVariablesLi
b.inf
- QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibNull.inf
-
QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/BaseQemuFwCfgS3LibNu
ll.inf
+ QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgDxeLib.inf
BhyveFwCtlLib|OvmfPkg/Library/BhyveFwCtlLib/BhyveFwCtlLib.inf
VirtioLib|OvmfPkg/Library/VirtioLib/VirtioLib.inf

MemEncryptSevLib|OvmfPkg/Library/BaseMemEncryptSevLib/DxeMemEncryptS
evLib.inf
@@ -355,6 +354,7 @@
!endif
PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
MpInitLib|UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.inf
+
QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/DxeQemuFwCfgS3LibFwC
fg.inf

[LibraryClasses.common.UEFI_APPLICATION]
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
--
2.11.0

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