Merge: update cpufreq to match upstream v6.15

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/6598

Reesolves: 83803
JIRA: https://issues.redhat.com/browse/RHEL-83803

Adds bugfixes and regular updates to match upstream v6.15.

Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>

Approved-by: Eric Chanudet <echanude@redhat.com>
Approved-by: David Arcari <darcari@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Augusto Caringi <acaringi@redhat.com>

Author: caringi

arch/powerpc/include/asm/reg.h

@@ -618,7 +618,7 @@
 #define HID1_ABE	(1<<10)		/* 7450 Address Broadcast Enable */
 #define HID1_PS		(1<<16)		/* 750FX PLL selection */
 #endif
-#define SPRN_HID2	0x3F8		/* Hardware Implementation Register 2 */
+#define SPRN_HID2_750FX	0x3F8		/* IBM 750FX HID2 Register */
 #define SPRN_HID2_GEKKO	0x398		/* Gekko HID2 Register */
 #define SPRN_IABR	0x3F2	/* Instruction Address Breakpoint Register */
 #define SPRN_IABR2	0x3FA		/* 83xx */

arch/powerpc/kernel/cpu_setup_6xx.S

@@ -372,7 +372,7 @@ _GLOBAL(__save_cpu_setup)
 	andi.	r3,r3,0xff00
 	cmpwi	cr0,r3,0x0200
 	bne	1f
-	mfspr	r4,SPRN_HID2
+	mfspr	r4,SPRN_HID2_750FX
 	stw	r4,CS_HID2(r5)
 1:
 	mtcr	r7
@@ -467,7 +467,7 @@ _GLOBAL(__restore_cpu_setup)
 	bne	4f
 	lwz	r4,CS_HID2(r5)
 	rlwinm	r4,r4,0,19,17
-	mtspr	SPRN_HID2,r4
+	mtspr	SPRN_HID2_750FX,r4
 	sync
 4:
 	lwz	r4,CS_HID1(r5)

arch/powerpc/kvm/book3s_emulate.c

@@ -714,7 +714,7 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 	case SPRN_HID1:
 		to_book3s(vcpu)->hid[1] = spr_val;
 		break;
-	case SPRN_HID2:
+	case SPRN_HID2_750FX:
 		to_book3s(vcpu)->hid[2] = spr_val;
 		break;
 	case SPRN_HID2_GEKKO:
@@ -900,7 +900,7 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
 	case SPRN_HID1:
 		*spr_val = to_book3s(vcpu)->hid[1];
 		break;
-	case SPRN_HID2:
+	case SPRN_HID2_750FX:
 	case SPRN_HID2_GEKKO:
 		*spr_val = to_book3s(vcpu)->hid[2];
 		break;

arch/powerpc/platforms/52xx/lite5200_sleep.S

@@ -199,7 +199,8 @@ lite5200_wakeup:
 
 	/* HIDs, MSR */
 	LOAD_SPRN(HID1, 0x19)
-	LOAD_SPRN(HID2, 0x1a)
+	/* FIXME: Should this use HID2_G2_LE? */
+	LOAD_SPRN(HID2_750FX, 0x1a)
 
 
 	/* address translation is tricky (see turn_on_mmu) */
@@ -279,7 +280,8 @@ save_regs:
 
 	SAVE_SPRN(HID0, 0x18)
 	SAVE_SPRN(HID1, 0x19)
-	SAVE_SPRN(HID2, 0x1a)
+	/* FIXME: Should this use HID2_G2_LE? */
+	SAVE_SPRN(HID2_750FX, 0x1a)
 	mfmsr	r10
 	stw	r10, (4*0x1b)(r4)
 	/*SAVE_SPRN(LR, 0x1c) have to save it before the call */

arch/powerpc/platforms/83xx/suspend-asm.S

@@ -68,7 +68,8 @@ _GLOBAL(mpc83xx_enter_deep_sleep)
 
 	mfspr	r5, SPRN_HID0
 	mfspr	r6, SPRN_HID1
-	mfspr	r7, SPRN_HID2
+	/* FIXME: Should this use SPRN_HID2_G2_LE? */
+	mfspr	r7, SPRN_HID2_750FX
 
 	stw	r5, SS_HID+0(r3)
 	stw	r6, SS_HID+4(r3)
@@ -396,7 +397,8 @@ mpc83xx_deep_resume:
 
 	mtspr	SPRN_HID0, r5
 	mtspr	SPRN_HID1, r6
-	mtspr	SPRN_HID2, r7
+	/* FIXME: Should this use SPRN_HID2_G2_LE? */
+	mtspr	SPRN_HID2_750FX, r7
 
 	lwz	r4, SS_IABR+0(r3)
 	lwz	r5, SS_IABR+4(r3)

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

@@ -674,15 +674,17 @@
 #define MSR_AMD_CPPC_REQ		0xc00102b3
 #define MSR_AMD_CPPC_STATUS		0xc00102b4
 
-#define AMD_CPPC_LOWEST_PERF(x)		(((x) >> 0) & 0xff)
-#define AMD_CPPC_LOWNONLIN_PERF(x)	(((x) >> 8) & 0xff)
-#define AMD_CPPC_NOMINAL_PERF(x)	(((x) >> 16) & 0xff)
-#define AMD_CPPC_HIGHEST_PERF(x)	(((x) >> 24) & 0xff)
-
-#define AMD_CPPC_MAX_PERF(x)		(((x) & 0xff) << 0)
-#define AMD_CPPC_MIN_PERF(x)		(((x) & 0xff) << 8)
-#define AMD_CPPC_DES_PERF(x)		(((x) & 0xff) << 16)
-#define AMD_CPPC_ENERGY_PERF_PREF(x)	(((x) & 0xff) << 24)
+/* Masks for use with MSR_AMD_CPPC_CAP1 */
+#define AMD_CPPC_LOWEST_PERF_MASK	GENMASK(7, 0)
+#define AMD_CPPC_LOWNONLIN_PERF_MASK	GENMASK(15, 8)
+#define AMD_CPPC_NOMINAL_PERF_MASK	GENMASK(23, 16)
+#define AMD_CPPC_HIGHEST_PERF_MASK	GENMASK(31, 24)
+
+/* Masks for use with MSR_AMD_CPPC_REQ */
+#define AMD_CPPC_MAX_PERF_MASK		GENMASK(7, 0)
+#define AMD_CPPC_MIN_PERF_MASK		GENMASK(15, 8)
+#define AMD_CPPC_DES_PERF_MASK		GENMASK(23, 16)
+#define AMD_CPPC_EPP_PERF_MASK		GENMASK(31, 24)
 
 /* AMD Performance Counter Global Status and Control MSRs */
 #define MSR_AMD64_PERF_CNTR_GLOBAL_STATUS	0xc0000300

arch/x86/kernel/acpi/cppc.c

@@ -4,6 +4,8 @@
  * Copyright (c) 2016, Intel Corporation.
  */
 
+#include <linux/bitfield.h>
+
 #include <acpi/cppc_acpi.h>
 #include <asm/msr.h>
 #include <asm/processor.h>
@@ -154,7 +156,7 @@ int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf)
 		if (ret)
 			goto out;
 
-		val = AMD_CPPC_HIGHEST_PERF(val);
+		val = FIELD_GET(AMD_CPPC_HIGHEST_PERF_MASK, val);
 	} else {
 		ret = cppc_get_highest_perf(cpu, &val);
 		if (ret)

drivers/cpufreq/Kconfig

@@ -217,6 +217,20 @@ config CPUFREQ_DT
 
 	  If in doubt, say N.
 
+config CPUFREQ_VIRT
+	tristate "Virtual cpufreq driver"
+	depends on GENERIC_ARCH_TOPOLOGY
+	help
+	  This adds a virtualized cpufreq driver for guest kernels that
+	  read/writes to a MMIO region for a virtualized cpufreq device to
+	  communicate with the host. It sends performance requests to the host
+	  which gets used as a hint to schedule vCPU threads and select CPU
+	  frequency. If a VM does not support a virtualized FIE such as AMUs,
+	  it updates the frequency scaling factor by polling host CPU frequency
+	  to enable accurate Per-Entity Load Tracking for tasks running in the guest.
+
+	  If in doubt, say N.
+
 config CPUFREQ_DT_PLATDEV
 	tristate "Generic DT based cpufreq platdev driver"
 	depends on OF
@@ -231,9 +245,7 @@ if X86
 source "drivers/cpufreq/Kconfig.x86"
 endif
 
-if ARM || ARM64
 source "drivers/cpufreq/Kconfig.arm"
-endif
 
 if PPC32 || PPC64
 source "drivers/cpufreq/Kconfig.powerpc"

drivers/cpufreq/Kconfig.powerpc

@@ -17,13 +17,6 @@ config CPU_FREQ_CBE_PMI
 	  frequencies. Using PMI, the processor will not only be able to run at
 	  lower speed, but also at lower core voltage.
 
-config CPU_FREQ_MAPLE
-	bool "Support for Maple 970FX Evaluation Board"
-	depends on PPC_MAPLE
-	help
-	  This adds support for frequency switching on Maple 970FX
-	  Evaluation Board and compatible boards (IBM JS2x blades).
-
 config CPU_FREQ_PMAC
 	bool "Support for Apple PowerBooks"
 	depends on ADB_PMU && PPC32

drivers/cpufreq/Makefile

@@ -16,6 +16,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_ATTR_SET)	+= cpufreq_governor_attr_set.o
 
 obj-$(CONFIG_CPUFREQ_DT)		+= cpufreq-dt.o
 obj-$(CONFIG_CPUFREQ_DT_PLATDEV)	+= cpufreq-dt-platdev.o
+obj-$(CONFIG_CPUFREQ_VIRT)		+= virtual-cpufreq.o
 
 # Traces
 CFLAGS_amd-pstate-trace.o               := -I$(src)
@@ -90,7 +91,6 @@ obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ)	+= vexpress-spc-cpufreq.o
 obj-$(CONFIG_CPU_FREQ_CBE)		+= ppc-cbe-cpufreq.o
 ppc-cbe-cpufreq-y			+= ppc_cbe_cpufreq_pervasive.o ppc_cbe_cpufreq.o
 obj-$(CONFIG_CPU_FREQ_CBE_PMI)		+= ppc_cbe_cpufreq_pmi.o
-obj-$(CONFIG_CPU_FREQ_MAPLE)		+= maple-cpufreq.o
 obj-$(CONFIG_QORIQ_CPUFREQ)   		+= qoriq-cpufreq.o
 obj-$(CONFIG_CPU_FREQ_PMAC)		+= pmac32-cpufreq.o
 obj-$(CONFIG_CPU_FREQ_PMAC64)		+= pmac64-cpufreq.o