Merge: platform/x86: hfi: Updates to support AMD Hardware Feedback Interface Driver

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/1563

Description:
updates for platform/x86: hfi: to support AMD Hardware Feedback Interface Driver

JIRA: https://issues.redhat.com/browse/RHEL-107081

Omitted-fix: 619f55c (Fix comes in with generic updated).

Build Info: 69066284

Tested: Successful tested on AMD (amd-krackan-01) system.

Signed-off-by: Steve Best <sbest@redhat.com>

Approved-by: Lenny Szubowicz <lszubowi@redhat.com>
Approved-by: Tony Camuso <tcamuso@redhat.com>
Approved-by: Radu Rendec <rrendec@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Scott Weaver <scweaver@redhat.com>

Author: swvrrh

arch/x86/include/asm/msr-index.h

@@ -728,6 +728,11 @@
 #define MSR_AMD64_PERF_CNTR_GLOBAL_CTL		0xc0000301
 #define MSR_AMD64_PERF_CNTR_GLOBAL_STATUS_CLR	0xc0000302
 
+/* AMD Hardware Feedback Support MSRs */
+#define MSR_AMD_WORKLOAD_CLASS_CONFIG		0xc0000500
+#define MSR_AMD_WORKLOAD_CLASS_ID		0xc0000501
+#define MSR_AMD_WORKLOAD_HRST			0xc0000502
+
 /* AMD Last Branch Record MSRs */
 #define MSR_AMD64_LBR_SELECT			0xc000010e
 

drivers/platform/x86/amd/Kconfig

@@ -6,6 +6,7 @@
 source "drivers/platform/x86/amd/hsmp/Kconfig"
 source "drivers/platform/x86/amd/pmf/Kconfig"
 source "drivers/platform/x86/amd/pmc/Kconfig"
+source "drivers/platform/x86/amd/hfi/Kconfig"
 
 config AMD_3D_VCACHE
 	tristate "AMD 3D V-Cache Performance Optimizer Driver"

drivers/platform/x86/amd/Makefile

@@ -10,3 +10,4 @@ obj-$(CONFIG_AMD_PMC)		+= pmc/
 obj-$(CONFIG_AMD_HSMP)		+= hsmp/
 obj-$(CONFIG_AMD_PMF)		+= pmf/
 obj-$(CONFIG_AMD_WBRF)		+= wbrf.o
+obj-$(CONFIG_AMD_HFI)		+= hfi/

drivers/platform/x86/amd/hfi/Kconfig

@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# AMD Hardware Feedback Interface Driver
+#
+
+config AMD_HFI
+	bool "AMD Hetero Core Hardware Feedback Driver"
+	depends on ACPI
+	depends on CPU_SUP_AMD
+	depends on SCHED_MC_PRIO
+	help
+	  Select this option to enable the AMD Heterogeneous Core Hardware
+	  Feedback Interface. If selected, hardware provides runtime thread
+	  classification guidance to the operating system on the performance and
+	  energy efficiency capabilities of each heterogeneous CPU core. These
+	  capabilities may vary due to the inherent differences in the core types
+	  and can also change as a result of variations in the operating
+	  conditions of the system such as power and thermal limits.

drivers/platform/x86/amd/hfi/Makefile

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# AMD Hardware Feedback Interface Driver
+#
+
+obj-$(CONFIG_AMD_HFI) += amd_hfi.o
+amd_hfi-objs := hfi.o