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authorjljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524>2012-12-17 02:13:14 +0000
committerjljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524>2012-12-17 02:13:14 +0000
commit14430c55c8d0e9a8487c2c74155e63299632ef5e (patch)
tree5c687c958e4677faf7353e32b4dc3ee78cb3bf26 /OvmfPkg/AcpiPlatformDxe
parentfb8a1b44a8ae6b6fb600b8ab50ccce631d873971 (diff)
downloadedk2-platforms-14430c55c8d0e9a8487c2c74155e63299632ef5e.tar.xz
OvmfPkg: create \_S3 and \_S4 packages dynamically
Move these states from the DSDT to the SSDT. Override the default configuration if the host has the following qemu commit: commit 459ae5ea5ad682c2b3220beb244d4102c1a4e332 Author: Gleb Natapov <gleb@redhat.com> Date: Mon Jun 4 14:31:55 2012 +0300 Add PIIX4 properties to control PM system states. This patch adds two things. First it allows QEMU to distinguish between regular powerdown and S4 powerdown. Later separate QMP notification will be added for S4 powerdown. Second it allows S3/S4 states to be disabled from QEMU command line. Some guests known to be broken with regards to power management, but allow to use it anyway. Using new properties management will be able to disable S3/S4 for such guests. Supported system state are passed to a firmware using new fw_cfg file. The file contains 6 byte array. Each byte represents one system state. If byte at offset X has its MSB set it means that system state X is supported and to enter it guest should use the value from lowest 3 bits. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14003 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/AcpiPlatformDxe')
-rw-r--r--OvmfPkg/AcpiPlatformDxe/Qemu.c112
1 files changed, 108 insertions, 4 deletions
diff --git a/OvmfPkg/AcpiPlatformDxe/Qemu.c b/OvmfPkg/AcpiPlatformDxe/Qemu.c
index 5ab89aa6c6..35d667fe3a 100644
--- a/OvmfPkg/AcpiPlatformDxe/Qemu.c
+++ b/OvmfPkg/AcpiPlatformDxe/Qemu.c
@@ -2,6 +2,9 @@
OVMF ACPI QEMU support
Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+
+ Copyright (C) 2012, Red Hat, Inc.
+
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -196,6 +199,19 @@ typedef struct {
PCI_WINDOW PciWindow64;
} FIRMWARE_DATA;
+typedef struct {
+ UINT8 NameOp;
+ UINT8 RootChar;
+ UINT8 NameChar[4];
+ UINT8 PackageOp;
+ UINT8 PkgLength;
+ UINT8 NumElements;
+ UINT8 DWordPrefix;
+ UINT8 Pm1aCntSlpTyp;
+ UINT8 Pm1bCntSlpTyp;
+ UINT8 Reserved[2];
+} SYSTEM_STATE_PACKAGE;
+
#pragma pack()
@@ -296,6 +312,80 @@ PopulateFwData(
STATIC
+VOID
+EFIAPI
+GetSuspendStates (
+ UINTN *SuspendToRamSize,
+ SYSTEM_STATE_PACKAGE *SuspendToRam,
+ UINTN *SuspendToDiskSize,
+ SYSTEM_STATE_PACKAGE *SuspendToDisk
+ )
+{
+ STATIC CONST SYSTEM_STATE_PACKAGE Template = {
+ 0x08, // NameOp
+ '\\', // RootChar
+ { '_', 'S', 'x', '_' }, // NameChar[4]
+ 0x12, // PackageOp
+ 0x07, // PkgLength
+ 0x01, // NumElements
+ 0x0c, // DWordPrefix
+ 0x00, // Pm1aCntSlpTyp
+ 0x00, // Pm1bCntSlpTyp -- we don't support it
+ { 0x00, 0x00 } // Reserved
+ };
+ RETURN_STATUS Status;
+ FIRMWARE_CONFIG_ITEM FwCfgItem;
+ UINTN FwCfgSize;
+ UINT8 SystemStates[6];
+
+ //
+ // configure defaults
+ //
+ *SuspendToRamSize = sizeof Template;
+ CopyMem (SuspendToRam, &Template, sizeof Template);
+ SuspendToRam->NameChar[2] = '3'; // S3
+ SuspendToRam->Pm1aCntSlpTyp = 1; // PIIX4: STR
+
+ *SuspendToDiskSize = sizeof Template;
+ CopyMem (SuspendToDisk, &Template, sizeof Template);
+ SuspendToDisk->NameChar[2] = '4'; // S4
+ SuspendToDisk->Pm1aCntSlpTyp = 2; // PIIX4: POSCL
+
+ //
+ // check for overrides
+ //
+ Status = QemuFwCfgFindFile ("etc/system-states", &FwCfgItem, &FwCfgSize);
+ if (Status != RETURN_SUCCESS || FwCfgSize != sizeof SystemStates) {
+ DEBUG ((DEBUG_INFO, "ACPI using S3/S4 defaults\n"));
+ return;
+ }
+ QemuFwCfgSelectItem (FwCfgItem);
+ QemuFwCfgReadBytes (sizeof SystemStates, SystemStates);
+
+ //
+ // Each byte corresponds to a system state. In each byte, the MSB tells us
+ // whether the given state is enabled. If so, the three LSBs specify the
+ // value to be written to the PM control register's SUS_TYP bits.
+ //
+ if (SystemStates[3] & BIT7) {
+ SuspendToRam->Pm1aCntSlpTyp = SystemStates[3] & (BIT2 | BIT1 | BIT0);
+ DEBUG ((DEBUG_INFO, "ACPI S3 value: %d\n", SuspendToRam->Pm1aCntSlpTyp));
+ } else {
+ *SuspendToRamSize = 0;
+ DEBUG ((DEBUG_INFO, "ACPI S3 disabled\n"));
+ }
+
+ if (SystemStates[4] & BIT7) {
+ SuspendToDisk->Pm1aCntSlpTyp = SystemStates[4] & (BIT2 | BIT1 | BIT0);
+ DEBUG ((DEBUG_INFO, "ACPI S4 value: %d\n", SuspendToDisk->Pm1aCntSlpTyp));
+ } else {
+ *SuspendToDiskSize = 0;
+ DEBUG ((DEBUG_INFO, "ACPI S4 disabled\n"));
+ }
+}
+
+
+STATIC
EFI_STATUS
EFIAPI
QemuInstallAcpiSsdtTable (
@@ -312,10 +402,16 @@ QemuInstallAcpiSsdtTable (
FwData = AllocateReservedPool (sizeof (*FwData));
if (FwData != NULL) {
- UINTN SsdtSize;
- UINT8 *Ssdt;
-
- SsdtSize = AcpiTableBufferSize + 17;
+ UINTN SuspendToRamSize;
+ SYSTEM_STATE_PACKAGE SuspendToRam;
+ UINTN SuspendToDiskSize;
+ SYSTEM_STATE_PACKAGE SuspendToDisk;
+ UINTN SsdtSize;
+ UINT8 *Ssdt;
+
+ GetSuspendStates (&SuspendToRamSize, &SuspendToRam,
+ &SuspendToDiskSize, &SuspendToDisk);
+ SsdtSize = AcpiTableBufferSize + 17 + SuspendToRamSize + SuspendToDiskSize;
Ssdt = AllocatePool (SsdtSize);
if (Ssdt != NULL) {
@@ -352,6 +448,14 @@ QemuInstallAcpiSsdtTable (
*(UINT32*) SsdtPtr = sizeof (*FwData);
SsdtPtr += 4;
+ //
+ // add suspend system states
+ //
+ CopyMem (SsdtPtr, &SuspendToRam, SuspendToRamSize);
+ SsdtPtr += SuspendToRamSize;
+ CopyMem (SsdtPtr, &SuspendToDisk, SuspendToDiskSize);
+ SsdtPtr += SuspendToDiskSize;
+
ASSERT((UINTN) (SsdtPtr - Ssdt) == SsdtSize);
((EFI_ACPI_DESCRIPTION_HEADER *) Ssdt)->Length = (UINT32) SsdtSize;
Status = InstallAcpiTable (AcpiProtocol, Ssdt, SsdtSize, TableKey);