OvmfPkg/ResetSystemLib: add driver for microvm

Uses the generic event device to reset and poweroff. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3599 Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
2021-09-08 11:01:14 +02:00
parent bf02d73e74
commit 1d3e89f349
8 changed files with 231 additions and 7 deletions
--- a/OvmfPkg/Library/ResetSystemLib/ResetSystemLibMicrovm.c
+++ b/OvmfPkg/Library/ResetSystemLib/ResetSystemLibMicrovm.c
@@ -0,0 +1,89 @@
+/** @file
+  Reset System Library functions for OVMF
+
+  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>                   // BIT1
+
+#include <Library/BaseLib.h>        // CpuDeadLoop()
+#include <Library/DebugLib.h>       // ASSERT()
+#include <Library/IoLib.h>          // IoWrite8()
+#include <Library/ResetSystemLib.h> // ResetCold()
+#include <Library/TimerLib.h>       // MicroSecondDelay()
+#include <Library/UefiRuntimeLib.h> // EfiGoneVirtual()
+#include <OvmfPlatforms.h>          // PIIX4_PMBA_VALUE
+
+static UINTN MicrovmGedBase (VOID)
+{
+  VOID *Address = (VOID*) MICROVM_GED_MMIO_BASE_REGS;
+
+  if (EfiGoneVirtual ()) {
+    EfiConvertPointer (0, &Address);
+    DEBUG ((DEBUG_INFO, "%a: virtual -> 0x%x\n", __FUNCTION__, Address));
+  } else {
+    DEBUG ((DEBUG_INFO, "%a: physical -> 0x%x\n", __FUNCTION__, Address));
+  }
+
+  return (UINTN) Address;
+}
+
+static VOID MicrovmReset (VOID)
+{
+  UINTN Address = MicrovmGedBase();
+
+  DEBUG ((DEBUG_INFO, "%a: microvm reset via ged\n", __FUNCTION__));
+  MmioWrite8 (Address + MICROVM_ACPI_GED_REG_RESET,
+              MICROVM_ACPI_GED_RESET_VALUE);
+  CpuDeadLoop ();
+}
+
+static VOID MicrovmShutdown (VOID)
+{
+  UINTN Address = MicrovmGedBase();
+
+  DEBUG ((DEBUG_INFO, "%a: microvm poweroff via ged\n", __FUNCTION__));
+  MmioWrite8 (Address + MICROVM_ACPI_GED_REG_SLEEP_CTL,
+              (1 << 5) /* enable bit */ |
+              (5 << 2) /* typ == S5  */);
+  CpuDeadLoop ();
+}
+
+VOID EFIAPI ResetCold (VOID)
+{
+  MicrovmReset();
+}
+
+VOID EFIAPI ResetWarm (VOID)
+{
+  MicrovmReset();
+}
+
+VOID
+EFIAPI
+ResetPlatformSpecific (
+  IN UINTN   DataSize,
+  IN VOID    *ResetData
+  )
+{
+  MicrovmReset();
+}
+
+VOID
+EFIAPI
+ResetSystem (
+  IN EFI_RESET_TYPE               ResetType,
+  IN EFI_STATUS                   ResetStatus,
+  IN UINTN                        DataSize,
+  IN VOID                         *ResetData OPTIONAL
+  )
+{
+  MicrovmReset();
+}
+
+VOID EFIAPI ResetShutdown (VOID)
+{
+  MicrovmShutdown();
+}