Files
qemu/include/hw/acpi/cxl.h

24 lines
782 B
C
Raw Normal View History

acpi/cxl: Add _OSC implementation (9.14.2) CXL 2.0 specification adds 2 new dwords to the existing _OSC definition from PCIe. The new dwords are accessed with a new uuid. This implementation supports what is in the specification. iasl -d decodes the result of this patch as: Name (SUPP, Zero) Name (CTRL, Zero) Name (SUPC, Zero) Name (CTRC, Zero) Method (_OSC, 4, NotSerialized) // _OSC: Operating System Capabilities { CreateDWordField (Arg3, Zero, CDW1) If (((Arg0 == ToUUID ("33db4d5b-1ff7-401c-9657-7441c03dd766") /* PCI Host Bridge Device */) || (Arg0 == ToUUID ("68f2d50b-c469-4d8a-bd3d-941a103fd3fc") /* Unknown UUID */))) { CreateDWordField (Arg3, 0x04, CDW2) CreateDWordField (Arg3, 0x08, CDW3) Local0 = CDW3 /* \_SB_.PC0C._OSC.CDW3 */ Local0 &= 0x1F If ((Arg1 != One)) { CDW1 |= 0x08 } If ((CDW3 != Local0)) { CDW1 |= 0x10 } SUPP = CDW2 /* \_SB_.PC0C._OSC.CDW2 */ CTRL = CDW3 /* \_SB_.PC0C._OSC.CDW3 */ CDW3 = Local0 If ((Arg0 == ToUUID ("68f2d50b-c469-4d8a-bd3d-941a103fd3fc") /* Unknown UUID */)) { CreateDWordField (Arg3, 0x0C, CDW4) CreateDWordField (Arg3, 0x10, CDW5) SUPC = CDW4 /* \_SB_.PC0C._OSC.CDW4 */ CTRC = CDW5 /* \_SB_.PC0C._OSC.CDW5 */ CDW5 |= One } Return (Arg3) } Else { CDW1 |= 0x04 Return (Arg3) } Signed-off-by: Ben Widawsky <ben.widawsky@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Message-Id: <20220429144110.25167-25-Jonathan.Cameron@huawei.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-04-29 15:40:49 +01:00
/*
* Copyright (C) 2020 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_ACPI_CXL_H
#define HW_ACPI_CXL_H
void build_cxl_osc_method(Aml *dev);
#endif