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When booting OvmfXen, the ACPI interface for shutdown/reset might not be available, instead use the hypercall interface. While it's probably possible to use the hypercall in all cases, we keep using the same interface while it still possible. That is ACPI on HVM guest, and fallback to hypercall on PVH guest. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Jason Andryuk <jason.andryuk@amd.com>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/** @file
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Base Reset System Library Shutdown API implementation for OVMF.
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Copyright (C) 2020, Red Hat, Inc.
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Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2022, Citrix Systems, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h> // BIT13
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#include <Library/BaseLib.h> // CpuDeadLoop()
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#include <Library/DebugLib.h> // ASSERT()
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#include <Library/IoLib.h> // IoOr16()
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#include <Library/PciLib.h> // PciRead16()
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#include <Library/ResetSystemLib.h> // ResetShutdown()
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#include <Library/XenHypercallLib.h>
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#include <OvmfPlatforms.h> // OVMF_HOSTBRIDGE_DID
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/**
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Calling this function causes the system to enter a power state equivalent
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to the ACPI G2/S5 or G3 states.
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System shutdown should not return, if it returns, it means the system does
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not support shut down reset.
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**/
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VOID
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EFIAPI
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ResetShutdown (
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VOID
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)
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{
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UINT16 AcpiPmBaseAddress;
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UINT16 HostBridgeDevId;
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AcpiPmBaseAddress = 0;
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HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);
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switch (HostBridgeDevId) {
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case INTEL_82441_DEVICE_ID:
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AcpiPmBaseAddress = PIIX4_PMBA_VALUE;
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break;
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case INTEL_Q35_MCH_DEVICE_ID:
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AcpiPmBaseAddress = ICH9_PMBASE_VALUE;
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break;
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default:
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{
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//
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// Fallback to using hypercall.
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// Necessary for PVH guest, but should work for HVM guest.
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//
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INTN ReturnCode;
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XEN_SCHED_SHUTDOWN ShutdownOp = {
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.Reason = XEN_SHED_SHUTDOWN_POWEROFF,
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};
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ReturnCode = XenHypercallSchedOp (XEN_SCHEDOP_SHUTDOWN, ShutdownOp);
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ASSERT (ReturnCode == 0);
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CpuDeadLoop ();
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}
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}
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IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, 0);
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IoOr16 (AcpiPmBaseAddress + 4, BIT13);
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CpuDeadLoop ();
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}
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