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authorStefan Hajnoczi <stefanha@redhat.com>2023-10-23 14:45:29 -0700
committerStefan Hajnoczi <stefanha@redhat.com>2023-10-23 14:45:29 -0700
commit1b4a5a20daab8fe787dd8cef1c13973d44a0bcf0 (patch)
treeeccc04939f1290097da28a11ba969bb306998f28 /hw/acpi
parentb093277edc8175a19189c62bd51e91ea93ef1673 (diff)
parentc7016bf700cfbee52d2797bc4c592a39b17c4de7 (diff)
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Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging
virtio,pc,pci: features, cleanups infrastructure for vhost-vdpa shadow work piix south bridge rework reconnect for vhost-user-scsi dummy ACPI QTG DSM for cxl tests, cleanups, fixes all over the place Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # -----BEGIN PGP SIGNATURE----- # # iQFDBAABCAAtFiEEXQn9CHHI+FuUyooNKB8NuNKNVGkFAmU06PMPHG1zdEByZWRo # YXQuY29tAAoJECgfDbjSjVRpNIsH/0DlKti86VZLJ6PbNqsnKxoK2gg05TbEhPZU # pQ+RPDaCHpFBsLC5qsoMJwvaEQFe0e49ZFemw7bXRzBxgmbbNnZ9ArCIPqT+rvQd # 7UBmyC+kacVyybZatq69aK2BHKFtiIRlT78d9Izgtjmp8V7oyKoz14Esh8wkE+FT # ypHUa70Addi6alNm6BVkm7bxZxi0Wrmf3THqF8ViYvufzHKl7JR5e17fKWEG0BqV # 9W7AeHMnzJ7jkTvBGUw7g5EbzFn7hPLTbO4G/VW97k0puS4WRX5aIMkVhUazsRIa # zDOuXCCskUWuRapiCwY0E4g7cCaT8/JR6JjjBaTgkjJgvo5Y8Eg= # =ILek # -----END PGP SIGNATURE----- # gpg: Signature made Sun 22 Oct 2023 02:18:43 PDT # gpg: using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469 # gpg: issuer "mst@redhat.com" # gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full] # gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [full] # Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67 # Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469 * tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (62 commits) intel-iommu: Report interrupt remapping faults, fix return value MAINTAINERS: Add include/hw/intc/i8259.h to the PC chip section vhost-user: Fix protocol feature bit conflict tests/acpi: Update DSDT.cxl with QTG DSM hw/cxl: Add QTG _DSM support for ACPI0017 device tests/acpi: Allow update of DSDT.cxl hw/i386/cxl: ensure maxram is greater than ram size for calculating cxl range vhost-user: fix lost reconnect vhost-user-scsi: start vhost when guest kicks vhost-user-scsi: support reconnect to backend vhost: move and rename the conn retry times vhost-user-common: send get_inflight_fd once hw/i386/pc_piix: Make PIIX4 south bridge usable in PC machine hw/isa/piix: Implement multi-process QEMU support also for PIIX4 hw/isa/piix: Resolve duplicate code regarding PCI interrupt wiring hw/isa/piix: Reuse PIIX3's PCI interrupt triggering in PIIX4 hw/isa/piix: Rename functions to be shared for PCI interrupt triggering hw/isa/piix: Reuse PIIX3 base class' realize method in PIIX4 hw/isa/piix: Share PIIX3's base class with PIIX4 hw/isa/piix: Harmonize names of reset control memory regions ... Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'hw/acpi')
-rw-r--r--hw/acpi/cxl.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c
index 92b46bc..9cd7905 100644
--- a/hw/acpi/cxl.c
+++ b/hw/acpi/cxl.c
@@ -30,6 +30,75 @@
#include "qapi/error.h"
#include "qemu/uuid.h"
+void build_cxl_dsm_method(Aml *dev)
+{
+ Aml *method, *ifctx, *ifctx2;
+
+ method = aml_method("_DSM", 4, AML_SERIALIZED);
+ {
+ Aml *function, *uuid;
+
+ uuid = aml_arg(0);
+ function = aml_arg(2);
+ /* CXL spec v3.0 9.17.3.1 _DSM Function for Retrieving QTG ID */
+ ifctx = aml_if(aml_equal(
+ uuid, aml_touuid("F365F9A6-A7DE-4071-A66A-B40C0B4F8E52")));
+
+ /* Function 0, standard DSM query function */
+ ifctx2 = aml_if(aml_equal(function, aml_int(0)));
+ {
+ uint8_t byte_list[1] = { 0x01 }; /* function 1 only */
+
+ aml_append(ifctx2,
+ aml_return(aml_buffer(sizeof(byte_list), byte_list)));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * Function 1
+ * Creating a package with static values. The max supported QTG ID will
+ * be 1 and recommended QTG IDs are 0 and then 1.
+ * The values here are statically created to simplify emulation. Values
+ * from a real BIOS would be determined by the performance of all the
+ * present CXL memory and then assigned.
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(1)));
+ {
+ Aml *pak, *pak1;
+
+ /*
+ * Return: A package containing two elements - a WORD that returns
+ * the maximum throttling group that the platform supports, and a
+ * package containing the QTG ID(s) that the platform recommends.
+ * Package {
+ * Max Supported QTG ID
+ * Package {QTG Recommendations}
+ * }
+ *
+ * While the SPEC specified WORD that hints at the value being
+ * 16bit, the ACPI dump of BIOS DSDT table showed that the values
+ * are integers with no specific size specification. aml_int() will
+ * be used for the values.
+ */
+ pak1 = aml_package(2);
+ /* Set QTG ID of 0 */
+ aml_append(pak1, aml_int(0));
+ /* Set QTG ID of 1 */
+ aml_append(pak1, aml_int(1));
+
+ pak = aml_package(2);
+ /* Set Max QTG 1 */
+ aml_append(pak, aml_int(1));
+ aml_append(pak, pak1);
+
+ aml_append(ifctx2, aml_return(pak));
+ }
+ aml_append(ifctx, ifctx2);
+ }
+ aml_append(method, ifctx);
+ aml_append(dev, method);
+}
+
static void cedt_build_chbs(GArray *table_data, PXBCXLDev *cxl)
{
PXBDev *pxb = PXB_DEV(cxl);