From fb8a1b44a8ae6b6fb600b8ab50ccce631d873971 Mon Sep 17 00:00:00 2001 From: jljusten Date: Mon, 17 Dec 2012 02:13:00 +0000 Subject: OvmfPkg: report S3 state in DSDT The ACPI 5.0 specification says: 7.3.4.4 System \_S3 State [...] * Dynamic RAM context is maintained. [...] This corresponds to the following in the PIIX4 spec: PMCNTRL -- POWER MANAGEMENT CONTROL REGISTER (IO) [...] Bits[12:10] Suspend Type [...] 001 STR (Suspend To RAM) Also, this (ie. decimal 1) is the suspend type value that qemu recognizes as an S3 (suspend to ram) request. Only the value for PM1a_CNT.SLP_TYP is set (PM1b_CNT.SLP_TYP is left at zero), since in OVMF we don't report the optional PM1b_EVT_BLK register block to OSPM. (PM1b_EVT_BLK is defined as 0 in "Platform.h"; see "4.8.1.1 PM1 Event Registers" in the ACPI 5.0 specification.) Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek Reviewed-by: Jordan Justen git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14002 6f19259b-4bc3-4df7-8a09-765794883524 --- OvmfPkg/AcpiTables/Dsdt.asl | 1 + 1 file changed, 1 insertion(+) (limited to 'OvmfPkg/AcpiTables') diff --git a/OvmfPkg/AcpiTables/Dsdt.asl b/OvmfPkg/AcpiTables/Dsdt.asl index 605766c09d..326942dd44 100644 --- a/OvmfPkg/AcpiTables/Dsdt.asl +++ b/OvmfPkg/AcpiTables/Dsdt.asl @@ -17,6 +17,7 @@ DefinitionBlock ("Dsdt.aml", "DSDT", 1, "INTEL ", "OVMF ", 4) { // System Sleep States // Name (\_S0, Package () {5, 0, 0, 0}) // Working + Name (\_S3, Package () {1, 0, 0, 0}) // Suspend to Ram (PIIX4: STR) Name (\_S4, Package () {2, 0, 0, 0}) // Suspend to Disk (PIIX4: POSCL) Name (\_S5, Package () {0, 0, 0, 0}) // Soft Off -- cgit v1.2.3