[PATCH v5 00/16] Support Andes PMU extension

[PATCH v5 00/16] Support Andes PMU extension

[Yu Chien Peter Lin]

Hi All,

This patch series introduces the Andes PMU extension, which serves
the same purpose as Sscofpmf. To use FDT-based probing for hardware
support of the PMU extensions, we first convert T-Head's PMU to CPU
feature alternative, and add Andes PMU alternatives.

Its non-standard local interrupt is assigned to bit 18 in the
custom S-mode local interrupt enable/pending registers (slie/slip),
while the interrupt cause is (256 + 18).

Mainline OpenSBI has supported Andes PMU extension:
- https://github.com/riscv-software-src/opensbi/tree/master
Linux patches (based on v6.7-rc5) can be found on Andes Technology GitHub
- https://github.com/andestech/linux/commits/andes-pmu-support-v5

The PMU device tree node used on AX45MP:
- https://github.com/riscv-software-src/opensbi/blob/master/docs/pmu_support.md#example-3

Locus Wei-Han Chen (1):
  riscv: andes: Support specifying symbolic firmware and hardware raw
    events

Yu Chien Peter Lin (15):
  riscv: errata: Rename defines for Andes
  irqchip/riscv-intc: Allow large non-standard interrupt number
  irqchip/riscv-intc: Introduce Andes hart-level interrupt controller
  dt-bindings: riscv: Add Andes interrupt controller compatible string
  riscv: dts: renesas: r9a07g043f: Update compatible string to use Andes
    INTC
  perf: RISC-V: Eliminate redundant interrupt enable/disable operations
  RISC-V: Move T-Head PMU to CPU feature alternative framework
  perf: RISC-V: Introduce Andes PMU for perf event sampling
  dt-bindings: riscv: Add T-Head PMU extension description
  dt-bindings: riscv: Add Andes PMU extension description
  riscv: dts: allwinner: Add T-Head PMU extension for sun20i-d1s
  riscv: dts: sophgo: Add T-Head PMU extension for cv1800b
  riscv: dts: sophgo: Add T-Head PMU extension for sg2042
  riscv: dts: thead: Add T-Head PMU extension for th1520
  riscv: dts: renesas: Add Andes PMU extension for r9a07g043f

 .../devicetree/bindings/riscv/cpus.yaml       |   6 +-
 .../devicetree/bindings/riscv/extensions.yaml |  13 ++
 arch/riscv/Kconfig.errata                     |  13 --
 arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi |   2 +-
 arch/riscv/boot/dts/renesas/r9a07g043f.dtsi   |   4 +-
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi       |   2 +-
 arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi   | 128 +++++++++---------
 arch/riscv/boot/dts/thead/th1520.dtsi         |   8 +-
 arch/riscv/errata/andes/errata.c              |  10 +-
 arch/riscv/errata/thead/errata.c              |  19 ---
 arch/riscv/include/asm/errata_list.h          |  19 +--
 arch/riscv/include/asm/hwcap.h                |   2 +
 arch/riscv/include/asm/vendorid_list.h        |   2 +-
 arch/riscv/kernel/alternative.c               |   2 +-
 arch/riscv/kernel/cpufeature.c                |   2 +
 drivers/irqchip/irq-riscv-intc.c              |  63 +++++++--
 drivers/perf/Kconfig                          |  27 ++++
 drivers/perf/riscv_pmu_sbi.c                  |  47 +++++--
 include/linux/soc/andes/irq.h                 |  17 +++
 .../arch/riscv/andes/ax45/firmware.json       |  68 ++++++++++
 .../arch/riscv/andes/ax45/instructions.json   | 127 +++++++++++++++++
 .../arch/riscv/andes/ax45/memory.json         |  57 ++++++++
 .../arch/riscv/andes/ax45/microarch.json      |  77 +++++++++++
 tools/perf/pmu-events/arch/riscv/mapfile.csv  |   1 +
 24 files changed, 565 insertions(+), 151 deletions(-)
 create mode 100644 include/linux/soc/andes/irq.h
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/firmware.json
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/instructions.json
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/memory.json
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/microarch.json

-- 
2.34.1

[PATCH v5 01/16] riscv: errata: Rename defines for Andes

[Yu Chien Peter Lin]

Use "ANDES" rather than "ANDESTECH" to unify the naming
convention with directory, file names, Kconfig options
and other definitions.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Changes v1 -> v2:
  - No change
Changes v2 -> v3:
  - Rewrite commit message (suggested by Conor)
Changes v3 -> v4:
  - Include Conor's Acked-by tag
Changes v4 -> v5:
  - Include Prabhakar's RB tag
---
 arch/riscv/errata/andes/errata.c       | 10 +++++-----
 arch/riscv/include/asm/errata_list.h   |  4 ++--
 arch/riscv/include/asm/vendorid_list.h |  2 +-
 arch/riscv/kernel/alternative.c        |  2 +-
 4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/riscv/errata/andes/errata.c b/arch/riscv/errata/andes/errata.c
index 17a904869724..f2708a9494a1 100644
--- a/arch/riscv/errata/andes/errata.c
+++ b/arch/riscv/errata/andes/errata.c
@@ -18,9 +18,9 @@
 #include <asm/sbi.h>
 #include <asm/vendorid_list.h>
 
-#define ANDESTECH_AX45MP_MARCHID	0x8000000000008a45UL
-#define ANDESTECH_AX45MP_MIMPID		0x500UL
-#define ANDESTECH_SBI_EXT_ANDES		0x0900031E
+#define ANDES_AX45MP_MARCHID		0x8000000000008a45UL
+#define ANDES_AX45MP_MIMPID		0x500UL
+#define ANDES_SBI_EXT_ANDES		0x0900031E
 
 #define ANDES_SBI_EXT_IOCP_SW_WORKAROUND	1
 
@@ -32,7 +32,7 @@ static long ax45mp_iocp_sw_workaround(void)
 	 * ANDES_SBI_EXT_IOCP_SW_WORKAROUND SBI EXT checks if the IOCP is missing and
 	 * cache is controllable only then CMO will be applied to the platform.
 	 */
-	ret = sbi_ecall(ANDESTECH_SBI_EXT_ANDES, ANDES_SBI_EXT_IOCP_SW_WORKAROUND,
+	ret = sbi_ecall(ANDES_SBI_EXT_ANDES, ANDES_SBI_EXT_IOCP_SW_WORKAROUND,
 			0, 0, 0, 0, 0, 0);
 
 	return ret.error ? 0 : ret.value;
@@ -50,7 +50,7 @@ static void errata_probe_iocp(unsigned int stage, unsigned long arch_id, unsigne
 
 	done = true;
 
-	if (arch_id != ANDESTECH_AX45MP_MARCHID || impid != ANDESTECH_AX45MP_MIMPID)
+	if (arch_id != ANDES_AX45MP_MARCHID || impid != ANDES_AX45MP_MIMPID)
 		return;
 
 	if (!ax45mp_iocp_sw_workaround())
diff --git a/arch/riscv/include/asm/errata_list.h b/arch/riscv/include/asm/errata_list.h
index 83ed25e43553..4ed21a62158c 100644
--- a/arch/riscv/include/asm/errata_list.h
+++ b/arch/riscv/include/asm/errata_list.h
@@ -12,8 +12,8 @@
 #include <asm/vendorid_list.h>
 
 #ifdef CONFIG_ERRATA_ANDES
-#define ERRATA_ANDESTECH_NO_IOCP	0
-#define ERRATA_ANDESTECH_NUMBER		1
+#define ERRATA_ANDES_NO_IOCP 0
+#define ERRATA_ANDES_NUMBER 1
 #endif
 
 #ifdef CONFIG_ERRATA_SIFIVE
diff --git a/arch/riscv/include/asm/vendorid_list.h b/arch/riscv/include/asm/vendorid_list.h
index e55407ace0c3..2f2bb0c84f9a 100644
--- a/arch/riscv/include/asm/vendorid_list.h
+++ b/arch/riscv/include/asm/vendorid_list.h
@@ -5,7 +5,7 @@
 #ifndef ASM_VENDOR_LIST_H
 #define ASM_VENDOR_LIST_H
 
-#define ANDESTECH_VENDOR_ID	0x31e
+#define ANDES_VENDOR_ID		0x31e
 #define SIFIVE_VENDOR_ID	0x489
 #define THEAD_VENDOR_ID		0x5b7
 
diff --git a/arch/riscv/kernel/alternative.c b/arch/riscv/kernel/alternative.c
index 319a1da0358b..0128b161bfda 100644
--- a/arch/riscv/kernel/alternative.c
+++ b/arch/riscv/kernel/alternative.c
@@ -43,7 +43,7 @@ static void riscv_fill_cpu_mfr_info(struct cpu_manufacturer_info_t *cpu_mfr_info
 
 	switch (cpu_mfr_info->vendor_id) {
 #ifdef CONFIG_ERRATA_ANDES
-	case ANDESTECH_VENDOR_ID:
+	case ANDES_VENDOR_ID:
 		cpu_mfr_info->patch_func = andes_errata_patch_func;
 		break;
 #endif
-- 
2.34.1

[PATCH v5 02/16] irqchip/riscv-intc: Allow large non-standard interrupt number

[Yu Chien Peter Lin]

Currently, the implementation of the RISC-V INTC driver uses the
interrupt cause as hardware interrupt number and has a limitation of
supporting a maximum of 64 interrupts. However, according to the
privileged spec, interrupt causes >= 16 are defined for platform use.

This limitation prevents to fully utilize the available local interrupt
sources. Additionally, the interrupt number used on RISC-V are sparse,
with only interrupt numbers 1, 5 and 9 (plus Sscofpmf or T-Head's PMU
interrupt) being currently used for supervisor mode.

Switch to using irq_domain_create_tree() to create the radix tree
map, so a larger number of hardware interrupts can be handled.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
---
Changes v1 -> v2:
  - Fixed irq mapping failure checking (suggested by Clément and Anup)
Changes v2 -> v3:
  - No change
Changes v3 -> v4: (Suggested by Thomas [1])
  - Use pr_warn_ratelimited instead
  - Fix coding style and commit message
Changes v4 -> v5: (Suggested by Thomas)
  - Fix commit message

[1] https://patchwork.kernel.org/project/linux-riscv/patch/20231023004100.2663486-3-peterlin@andestech.com/#25573085
---
 drivers/irqchip/irq-riscv-intc.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index e8d01b14ccdd..2fdd40f2a791 100644
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -24,10 +24,9 @@ static asmlinkage void riscv_intc_irq(struct pt_regs *regs)
 {
 	unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;
 
-	if (unlikely(cause >= BITS_PER_LONG))
-		panic("unexpected interrupt cause");
-
-	generic_handle_domain_irq(intc_domain, cause);
+	if (generic_handle_domain_irq(intc_domain, cause))
+		pr_warn_ratelimited("Failed to handle interrupt (cause: %ld)\n",
+				    cause);
 }
 
 /*
@@ -117,8 +116,7 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
 {
 	int rc;
 
-	intc_domain = irq_domain_create_linear(fn, BITS_PER_LONG,
-					       &riscv_intc_domain_ops, NULL);
+	intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, NULL);
 	if (!intc_domain) {
 		pr_err("unable to add IRQ domain\n");
 		return -ENXIO;
@@ -132,8 +130,6 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
 
 	riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
 
-	pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
-
 	return 0;
 }
 
-- 
2.34.1

[PATCH v5 03/16] irqchip/riscv-intc: Introduce Andes hart-level interrupt controller

[Yu Chien Peter Lin]

Add support for the Andes hart-level interrupt controller. This
controller provides interrupt mask/unmask functions to access the
custom register (SLIE) where the non-standard S-mode local interrupt
enable bits are located.

To share the riscv_intc_domain_map() with the generic RISC-V INTC and
ACPI, add a chip parameter to riscv_intc_init_common(), so it can be
passed to the irq_domain_set_info() as private data.

Andes hart-level interrupt controller requires the "andestech,cpu-intc"
compatible string to be present in interrupt-controller of cpu node.
e.g.,

  cpu0: cpu@0 {
      compatible = "andestech,ax45mp", "riscv";
      ...
      cpu0-intc: interrupt-controller {
          #interrupt-cells = <0x01>;
          compatible = "andestech,cpu-intc", "riscv,cpu-intc";
          interrupt-controller;
      };
  };

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
---
Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - Return -ENXIO if no valid compatible INTC found
  - Allow falling back to generic RISC-V INTC
Changes v3 -> v4: (Suggested by Thomas [1])
  - Add comment to andes irq chip function
  - Refine code flow to share with generic RISC-V INTC and ACPI
  - Move Andes specific definitions to include/linux/soc/andes/irq.h
Changes v4 -> v5: (Suggested by Thomas)
  - Fix commit message
  - Subtract ANDES_SLI_CAUSE_BASE from d->hwirq to calculate the value of mask
  - Do not set chip_data to the chip itself with irq_domain_set_info()
  - Follow reverse fir tree order variable declarations

[1] https://patchwork.kernel.org/project/linux-riscv/patch/20231019135723.3657156-1-peterlin@andestech.com/
---
 drivers/irqchip/irq-riscv-intc.c | 53 ++++++++++++++++++++++++++++----
 include/linux/soc/andes/irq.h    | 17 ++++++++++
 2 files changed, 64 insertions(+), 6 deletions(-)
 create mode 100644 include/linux/soc/andes/irq.h

diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index 2fdd40f2a791..0b6bf3fb1dba 100644
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/smp.h>
+#include <linux/soc/andes/irq.h>
 
 static struct irq_domain *intc_domain;
 
@@ -46,6 +47,31 @@ static void riscv_intc_irq_unmask(struct irq_data *d)
 	csr_set(CSR_IE, BIT(d->hwirq));
 }
 
+static void andes_intc_irq_mask(struct irq_data *d)
+{
+	/*
+	 * Andes specific S-mode local interrupt causes (hwirq)
+	 * are defined as (256 + n) and controlled by n-th bit
+	 * of SLIE.
+	 */
+	unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
+
+	if (d->hwirq < ANDES_SLI_CAUSE_BASE)
+		csr_clear(CSR_IE, mask);
+	else
+		csr_clear(ANDES_CSR_SLIE, mask);
+}
+
+static void andes_intc_irq_unmask(struct irq_data *d)
+{
+	unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
+
+	if (d->hwirq < ANDES_SLI_CAUSE_BASE)
+		csr_set(CSR_IE, mask);
+	else
+		csr_set(ANDES_CSR_SLIE, mask);
+}
+
 static void riscv_intc_irq_eoi(struct irq_data *d)
 {
 	/*
@@ -69,11 +95,20 @@ static struct irq_chip riscv_intc_chip = {
 	.irq_eoi = riscv_intc_irq_eoi,
 };
 
+static struct irq_chip andes_intc_chip = {
+	.name       = "RISC-V INTC",
+	.irq_mask   = andes_intc_irq_mask,
+	.irq_unmask = andes_intc_irq_unmask,
+	.irq_eoi    = riscv_intc_irq_eoi,
+};
+
 static int riscv_intc_domain_map(struct irq_domain *d, unsigned int irq,
 				 irq_hw_number_t hwirq)
 {
+	struct irq_chip *chip = d->host_data;
+
 	irq_set_percpu_devid(irq);
-	irq_domain_set_info(d, irq, hwirq, &riscv_intc_chip, d->host_data,
+	irq_domain_set_info(d, irq, hwirq, chip, NULL,
 			    handle_percpu_devid_irq, NULL, NULL);
 
 	return 0;
@@ -112,11 +147,12 @@ static struct fwnode_handle *riscv_intc_hwnode(void)
 	return intc_domain->fwnode;
 }
 
-static int __init riscv_intc_init_common(struct fwnode_handle *fn)
+static int __init riscv_intc_init_common(struct fwnode_handle *fn,
+					 struct irq_chip *chip)
 {
 	int rc;
 
-	intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, NULL);
+	intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, chip);
 	if (!intc_domain) {
 		pr_err("unable to add IRQ domain\n");
 		return -ENXIO;
@@ -136,8 +172,9 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
 static int __init riscv_intc_init(struct device_node *node,
 				  struct device_node *parent)
 {
-	int rc;
+	struct irq_chip *chip = &riscv_intc_chip;
 	unsigned long hartid;
+	int rc;
 
 	rc = riscv_of_parent_hartid(node, &hartid);
 	if (rc < 0) {
@@ -162,10 +199,14 @@ static int __init riscv_intc_init(struct device_node *node,
 		return 0;
 	}
 
-	return riscv_intc_init_common(of_node_to_fwnode(node));
+	if (of_device_is_compatible(node, "andestech,cpu-intc"))
+		chip = &andes_intc_chip;
+
+	return riscv_intc_init_common(of_node_to_fwnode(node), chip);
 }
 
 IRQCHIP_DECLARE(riscv, "riscv,cpu-intc", riscv_intc_init);
+IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init);
 
 #ifdef CONFIG_ACPI
 
@@ -192,7 +233,7 @@ static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
 		return -ENOMEM;
 	}
 
-	return riscv_intc_init_common(fn);
+	return riscv_intc_init_common(fn, &riscv_intc_chip);
 }
 
 IRQCHIP_ACPI_DECLARE(riscv_intc, ACPI_MADT_TYPE_RINTC, NULL,
diff --git a/include/linux/soc/andes/irq.h b/include/linux/soc/andes/irq.h
new file mode 100644
index 000000000000..f03e68fea261
--- /dev/null
+++ b/include/linux/soc/andes/irq.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2023 Andes Technology Corporation
+ */
+#ifndef __ANDES_IRQ_H
+#define __ANDES_IRQ_H
+
+/* Andes PMU irq number */
+#define ANDES_RV_IRQ_PMU		18
+#define ANDES_SLI_CAUSE_BASE		256
+
+/* Andes PMU related registers */
+#define ANDES_CSR_SLIE			0x9c4
+#define ANDES_CSR_SLIP			0x9c5
+#define ANDES_CSR_SCOUNTEROF		0x9d4
+
+#endif /* __ANDES_IRQ_H */
-- 
2.34.1

[PATCH v5 04/16] dt-bindings: riscv: Add Andes interrupt controller compatible string

[Yu Chien Peter Lin]

Add "andestech,cpu-intc" compatible string to indicate that
Andes specific local interrupt is supported on the core,
e.g. AX45MP cores have 3 types of non-standard local interrupt
can be handled in supervisor mode:

- Slave port ECC error interrupt
- Bus write transaction error interrupt
- Performance monitor overflow interrupt

These interrupts are enabled/disabled via a custom register
SLIE instead of the standard interrupt enable register SIE.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - Updated commit message
  - Fixed possible compatibles for Andes INTC
Changes v3 -> v4:
  - Add const entry instead of enum (Suggested by Conor)
Changes v4 -> v5:
  - Include Conor's Acked-by
  - Include Prabhakar's Reviewed-by
---
 Documentation/devicetree/bindings/riscv/cpus.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index f392e367d673..50307554478f 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -100,7 +100,11 @@ properties:
         const: 1
 
       compatible:
-        const: riscv,cpu-intc
+        oneOf:
+          - items:
+              - const: andestech,cpu-intc
+              - const: riscv,cpu-intc
+          - const: riscv,cpu-intc
 
       interrupt-controller: true
 
-- 
2.34.1

[PATCH v5 05/16] riscv: dts: renesas: r9a07g043f: Update compatible string to use Andes INTC

[Yu Chien Peter Lin]

The Andes hart-level interrupt controller (Andes INTC) allows AX45MP
cores to handle custom local interrupts, such as the performance
counter overflow interrupt.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - Fixed possible compatibles for Andes INTC
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - Include Geert's Reviewed-by
  - Include Prabhakar's Reviewed/Tested-by
---
 arch/riscv/boot/dts/renesas/r9a07g043f.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi b/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
index eb301d8eb2b0..78072e80793d 100644
--- a/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
+++ b/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
@@ -38,7 +38,7 @@ cpu0: cpu@0 {
 
 			cpu0_intc: interrupt-controller {
 				#interrupt-cells = <1>;
-				compatible = "riscv,cpu-intc";
+				compatible = "andestech,cpu-intc", "riscv,cpu-intc";
 				interrupt-controller;
 			};
 		};
-- 
2.34.1

[PATCH v5 06/16] perf: RISC-V: Eliminate redundant interrupt enable/disable operations

[Yu Chien Peter Lin]

The interrupt enable/disable operations are already performed by the
IRQ chip functions riscv_intc_irq_unmask()/riscv_intc_irq_mask() during
enable_percpu_irq()/disable_percpu_irq(). It can be done only once.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
---
This patch allows us to drop unnecessary ALT_SBI_PMU_OVF_{DISABLE,ENABLE}
in the initial PATCH3 [1].

[1] https://patchwork.kernel.org/project/linux-riscv/patch/20230907021635.1002738-4-peterlin@andestech.com/

Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - No change
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - No change
---
 drivers/perf/riscv_pmu_sbi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
index 16acd4dcdb96..2edbc37abadf 100644
--- a/drivers/perf/riscv_pmu_sbi.c
+++ b/drivers/perf/riscv_pmu_sbi.c
@@ -781,7 +781,6 @@ static int pmu_sbi_starting_cpu(unsigned int cpu, struct hlist_node *node)
 	if (riscv_pmu_use_irq) {
 		cpu_hw_evt->irq = riscv_pmu_irq;
 		csr_clear(CSR_IP, BIT(riscv_pmu_irq_num));
-		csr_set(CSR_IE, BIT(riscv_pmu_irq_num));
 		enable_percpu_irq(riscv_pmu_irq, IRQ_TYPE_NONE);
 	}
 
@@ -792,7 +791,6 @@ static int pmu_sbi_dying_cpu(unsigned int cpu, struct hlist_node *node)
 {
 	if (riscv_pmu_use_irq) {
 		disable_percpu_irq(riscv_pmu_irq);
-		csr_clear(CSR_IE, BIT(riscv_pmu_irq_num));
 	}
 
 	/* Disable all counters access for user mode now */
-- 
2.34.1

[PATCH v5 07/16] RISC-V: Move T-Head PMU to CPU feature alternative framework

[Yu Chien Peter Lin]

The custom PMU extension aims to support perf event sampling prior
to the ratification of Sscofpmf. Instead of diverting the bits and
register reserved for future standard, a set of custom registers is
added.  Hence, we may consider it as a CPU feature rather than an
erratum.

T-Head cores need to append "xtheadpmu" to the riscv,isa-extensions
for each cpu node in device tree, and enable CONFIG_THEAD_CUSTOM_PMU
for proper functioning as of this commit.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
---
Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - Removed m{vendor/arch/imp}id checks in pmu_sbi_setup_irqs()
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - Include Guo's Reviewed-by
  - Let THEAD_CUSTOM_PMU depend on ARCH_THEAD
---
 arch/riscv/Kconfig.errata            | 13 -------------
 arch/riscv/errata/thead/errata.c     | 19 -------------------
 arch/riscv/include/asm/errata_list.h | 15 +--------------
 arch/riscv/include/asm/hwcap.h       |  1 +
 arch/riscv/kernel/cpufeature.c       |  1 +
 drivers/perf/Kconfig                 | 13 +++++++++++++
 drivers/perf/riscv_pmu_sbi.c         | 19 ++++++++++++++-----
 7 files changed, 30 insertions(+), 51 deletions(-)

diff --git a/arch/riscv/Kconfig.errata b/arch/riscv/Kconfig.errata
index e2c731cfed8c..0d19f47d1018 100644
--- a/arch/riscv/Kconfig.errata
+++ b/arch/riscv/Kconfig.errata
@@ -86,17 +86,4 @@ config ERRATA_THEAD_CMO
 
 	  If you don't know what to do here, say "Y".
 
-config ERRATA_THEAD_PMU
-	bool "Apply T-Head PMU errata"
-	depends on ERRATA_THEAD && RISCV_PMU_SBI
-	default y
-	help
-	  The T-Head C9xx cores implement a PMU overflow extension very
-	  similar to the core SSCOFPMF extension.
-
-	  This will apply the overflow errata to handle the non-standard
-	  behaviour via the regular SBI PMU driver and interface.
-
-	  If you don't know what to do here, say "Y".
-
 endmenu # "CPU errata selection"
diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c
index 0554ed4bf087..5de5f7209132 100644
--- a/arch/riscv/errata/thead/errata.c
+++ b/arch/riscv/errata/thead/errata.c
@@ -53,22 +53,6 @@ static bool errata_probe_cmo(unsigned int stage,
 	return true;
 }
 
-static bool errata_probe_pmu(unsigned int stage,
-			     unsigned long arch_id, unsigned long impid)
-{
-	if (!IS_ENABLED(CONFIG_ERRATA_THEAD_PMU))
-		return false;
-
-	/* target-c9xx cores report arch_id and impid as 0 */
-	if (arch_id != 0 || impid != 0)
-		return false;
-
-	if (stage == RISCV_ALTERNATIVES_EARLY_BOOT)
-		return false;
-
-	return true;
-}
-
 static u32 thead_errata_probe(unsigned int stage,
 			      unsigned long archid, unsigned long impid)
 {
@@ -80,9 +64,6 @@ static u32 thead_errata_probe(unsigned int stage,
 	if (errata_probe_cmo(stage, archid, impid))
 		cpu_req_errata |= BIT(ERRATA_THEAD_CMO);
 
-	if (errata_probe_pmu(stage, archid, impid))
-		cpu_req_errata |= BIT(ERRATA_THEAD_PMU);
-
 	return cpu_req_errata;
 }
 
diff --git a/arch/riscv/include/asm/errata_list.h b/arch/riscv/include/asm/errata_list.h
index 4ed21a62158c..9bccc2ba0eb5 100644
--- a/arch/riscv/include/asm/errata_list.h
+++ b/arch/riscv/include/asm/errata_list.h
@@ -25,8 +25,7 @@
 #ifdef CONFIG_ERRATA_THEAD
 #define	ERRATA_THEAD_PBMT 0
 #define	ERRATA_THEAD_CMO 1
-#define	ERRATA_THEAD_PMU 2
-#define	ERRATA_THEAD_NUMBER 3
+#define	ERRATA_THEAD_NUMBER 2
 #endif
 
 #ifdef __ASSEMBLY__
@@ -147,18 +146,6 @@ asm volatile(ALTERNATIVE_2(						\
 	    "r"((unsigned long)(_start) + (_size))			\
 	: "a0")
 
-#define THEAD_C9XX_RV_IRQ_PMU			17
-#define THEAD_C9XX_CSR_SCOUNTEROF		0x5c5
-
-#define ALT_SBI_PMU_OVERFLOW(__ovl)					\
-asm volatile(ALTERNATIVE(						\
-	"csrr %0, " __stringify(CSR_SSCOUNTOVF),			\
-	"csrr %0, " __stringify(THEAD_C9XX_CSR_SCOUNTEROF),		\
-		THEAD_VENDOR_ID, ERRATA_THEAD_PMU,			\
-		CONFIG_ERRATA_THEAD_PMU)				\
-	: "=r" (__ovl) :						\
-	: "memory")
-
 #endif /* __ASSEMBLY__ */
 
 #endif
diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index 06d30526ef3b..c85ee34c78d9 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -57,6 +57,7 @@
 #define RISCV_ISA_EXT_ZIHPM		42
 #define RISCV_ISA_EXT_SMSTATEEN		43
 #define RISCV_ISA_EXT_ZICOND		44
+#define RISCV_ISA_EXT_XTHEADPMU		45
 
 #define RISCV_ISA_EXT_MAX		64
 
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index b3785ffc1570..e606f588d366 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -185,6 +185,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
 	__RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL),
 	__RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT),
 	__RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT),
+	__RISCV_ISA_EXT_DATA(xtheadpmu, RISCV_ISA_EXT_XTHEADPMU),
 };
 
 const size_t riscv_isa_ext_count = ARRAY_SIZE(riscv_isa_ext);
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
index 273d67ecf6d2..6cef15ec7c25 100644
--- a/drivers/perf/Kconfig
+++ b/drivers/perf/Kconfig
@@ -86,6 +86,19 @@ config RISCV_PMU_SBI
 	  full perf feature support i.e. counter overflow, privilege mode
 	  filtering, counter configuration.
 
+config THEAD_CUSTOM_PMU
+	bool "T-Head custom PMU support"
+	depends on ARCH_THEAD && RISCV_ALTERNATIVE && RISCV_PMU_SBI
+	default y
+	help
+	  The T-Head C9xx cores implement a PMU overflow extension very
+	  similar to the core SSCOFPMF extension.
+
+	  This will patch the overflow CSR and handle the non-standard
+	  behaviour via the regular SBI PMU driver and interface.
+
+	  If you don't know what to do here, say "Y".
+
 config ARM_PMU_ACPI
 	depends on ARM_PMU && ACPI
 	def_bool y
diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
index 2edbc37abadf..31ca79846399 100644
--- a/drivers/perf/riscv_pmu_sbi.c
+++ b/drivers/perf/riscv_pmu_sbi.c
@@ -20,10 +20,21 @@
 #include <linux/cpu_pm.h>
 #include <linux/sched/clock.h>
 
-#include <asm/errata_list.h>
 #include <asm/sbi.h>
 #include <asm/cpufeature.h>
 
+#define THEAD_C9XX_RV_IRQ_PMU		17
+#define THEAD_C9XX_CSR_SCOUNTEROF	0x5c5
+
+#define ALT_SBI_PMU_OVERFLOW(__ovl)					\
+asm volatile(ALTERNATIVE(						\
+	"csrr %0, " __stringify(CSR_SSCOUNTOVF),			\
+	"csrr %0, " __stringify(THEAD_C9XX_CSR_SCOUNTEROF),		\
+		0, RISCV_ISA_EXT_XTHEADPMU,				\
+		CONFIG_THEAD_CUSTOM_PMU)				\
+	: "=r" (__ovl) :						\
+	: "memory")
+
 #define SYSCTL_NO_USER_ACCESS	0
 #define SYSCTL_USER_ACCESS	1
 #define SYSCTL_LEGACY		2
@@ -808,10 +819,8 @@ static int pmu_sbi_setup_irqs(struct riscv_pmu *pmu, struct platform_device *pde
 	if (riscv_isa_extension_available(NULL, SSCOFPMF)) {
 		riscv_pmu_irq_num = RV_IRQ_PMU;
 		riscv_pmu_use_irq = true;
-	} else if (IS_ENABLED(CONFIG_ERRATA_THEAD_PMU) &&
-		   riscv_cached_mvendorid(0) == THEAD_VENDOR_ID &&
-		   riscv_cached_marchid(0) == 0 &&
-		   riscv_cached_mimpid(0) == 0) {
+	} else if (riscv_isa_extension_available(NULL, XTHEADPMU) &&
+		   IS_ENABLED(CONFIG_THEAD_CUSTOM_PMU)) {
 		riscv_pmu_irq_num = THEAD_C9XX_RV_IRQ_PMU;
 		riscv_pmu_use_irq = true;
 	}
-- 
2.34.1

[PATCH v5 08/16] perf: RISC-V: Introduce Andes PMU for perf event sampling

[Yu Chien Peter Lin]

The Andes PMU extension provides the same mechanism as Sscofpmf,
allowing us to reuse the SBI PMU driver to support event sampling
and mode filtering.

To make use of this custom PMU extension, "xandespmu" needs
to be appended to the riscv,isa-extensions for each cpu node
in device-tree, and enable CONFIG_ANDES_CUSTOM_PMU.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Co-developed-by: Locus Wei-Han Chen <locus84@andestech.com>
Signed-off-by: Locus Wei-Han Chen <locus84@andestech.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - Reordered list in riscv_isa_ext[]
  - Removed mvendorid check in pmu_sbi_setup_irqs()
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - Let ANDES_CUSTOM_PMU depend on ARCH_RENESAS
  - Include Prabhakar's Reviewed/Tested-by
---
 arch/riscv/include/asm/hwcap.h |  1 +
 arch/riscv/kernel/cpufeature.c |  1 +
 drivers/perf/Kconfig           | 14 ++++++++++++++
 drivers/perf/riscv_pmu_sbi.c   | 30 +++++++++++++++++++++++++-----
 4 files changed, 41 insertions(+), 5 deletions(-)

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index c85ee34c78d9..cbfbc3505d2c 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -58,6 +58,7 @@
 #define RISCV_ISA_EXT_SMSTATEEN		43
 #define RISCV_ISA_EXT_ZICOND		44
 #define RISCV_ISA_EXT_XTHEADPMU		45
+#define RISCV_ISA_EXT_XANDESPMU		46
 
 #define RISCV_ISA_EXT_MAX		64
 
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index e606f588d366..42fda134c4a3 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -185,6 +185,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
 	__RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL),
 	__RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT),
 	__RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT),
+	__RISCV_ISA_EXT_DATA(xandespmu, RISCV_ISA_EXT_XANDESPMU),
 	__RISCV_ISA_EXT_DATA(xtheadpmu, RISCV_ISA_EXT_XTHEADPMU),
 };
 
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
index 6cef15ec7c25..18f4c62eafc2 100644
--- a/drivers/perf/Kconfig
+++ b/drivers/perf/Kconfig
@@ -86,6 +86,20 @@ config RISCV_PMU_SBI
 	  full perf feature support i.e. counter overflow, privilege mode
 	  filtering, counter configuration.
 
+config ANDES_CUSTOM_PMU
+	bool "Andes custom PMU support"
+	depends on ARCH_RENESAS && RISCV_ALTERNATIVE && RISCV_PMU_SBI
+	default y
+	help
+	  The Andes cores implement a PMU overflow extension very
+	  similar to the core SSCOFPMF extension.
+
+	  This will patch the overflow/pending CSR and handle the
+	  non-standard behaviour via the regular SBI PMU driver and
+	  interface.
+
+	  If you don't know what to do here, say "Y".
+
 config THEAD_CUSTOM_PMU
 	bool "T-Head custom PMU support"
 	depends on ARCH_THEAD && RISCV_ALTERNATIVE && RISCV_PMU_SBI
diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
index 31ca79846399..1e0c709efbfc 100644
--- a/drivers/perf/riscv_pmu_sbi.c
+++ b/drivers/perf/riscv_pmu_sbi.c
@@ -19,6 +19,7 @@
 #include <linux/of.h>
 #include <linux/cpu_pm.h>
 #include <linux/sched/clock.h>
+#include <linux/soc/andes/irq.h>
 
 #include <asm/sbi.h>
 #include <asm/cpufeature.h>
@@ -27,14 +28,26 @@
 #define THEAD_C9XX_CSR_SCOUNTEROF	0x5c5
 
 #define ALT_SBI_PMU_OVERFLOW(__ovl)					\
-asm volatile(ALTERNATIVE(						\
+asm volatile(ALTERNATIVE_2(						\
 	"csrr %0, " __stringify(CSR_SSCOUNTOVF),			\
 	"csrr %0, " __stringify(THEAD_C9XX_CSR_SCOUNTEROF),		\
 		0, RISCV_ISA_EXT_XTHEADPMU,				\
-		CONFIG_THEAD_CUSTOM_PMU)				\
+		CONFIG_THEAD_CUSTOM_PMU,				\
+	"csrr %0, " __stringify(ANDES_CSR_SCOUNTEROF),			\
+		0, RISCV_ISA_EXT_XANDESPMU,		\
+		CONFIG_ANDES_CUSTOM_PMU)				\
 	: "=r" (__ovl) :						\
 	: "memory")
 
+#define ALT_SBI_PMU_OVF_CLEAR_PENDING(__irq_mask)			\
+asm volatile(ALTERNATIVE(						\
+	"csrc " __stringify(CSR_IP) ", %0\n\t",				\
+	"csrc " __stringify(ANDES_CSR_SLIP) ", %0\n\t",			\
+		0, RISCV_ISA_EXT_XANDESPMU,				\
+		CONFIG_ANDES_CUSTOM_PMU)				\
+	: : "r"(__irq_mask)						\
+	: "memory")
+
 #define SYSCTL_NO_USER_ACCESS	0
 #define SYSCTL_USER_ACCESS	1
 #define SYSCTL_LEGACY		2
@@ -72,6 +85,7 @@ static int sysctl_perf_user_access __read_mostly = SYSCTL_USER_ACCESS;
 static union sbi_pmu_ctr_info *pmu_ctr_list;
 static bool riscv_pmu_use_irq;
 static unsigned int riscv_pmu_irq_num;
+static unsigned int riscv_pmu_irq_mask;
 static unsigned int riscv_pmu_irq;
 
 /* Cache the available counters in a bitmask */
@@ -705,7 +719,7 @@ static irqreturn_t pmu_sbi_ovf_handler(int irq, void *dev)
 
 	event = cpu_hw_evt->events[fidx];
 	if (!event) {
-		csr_clear(CSR_SIP, BIT(riscv_pmu_irq_num));
+		ALT_SBI_PMU_OVF_CLEAR_PENDING(riscv_pmu_irq_mask);
 		return IRQ_NONE;
 	}
 
@@ -719,7 +733,7 @@ static irqreturn_t pmu_sbi_ovf_handler(int irq, void *dev)
 	 * Overflow interrupt pending bit should only be cleared after stopping
 	 * all the counters to avoid any race condition.
 	 */
-	csr_clear(CSR_SIP, BIT(riscv_pmu_irq_num));
+	ALT_SBI_PMU_OVF_CLEAR_PENDING(riscv_pmu_irq_mask);
 
 	/* No overflow bit is set */
 	if (!overflow)
@@ -791,7 +805,7 @@ static int pmu_sbi_starting_cpu(unsigned int cpu, struct hlist_node *node)
 
 	if (riscv_pmu_use_irq) {
 		cpu_hw_evt->irq = riscv_pmu_irq;
-		csr_clear(CSR_IP, BIT(riscv_pmu_irq_num));
+		ALT_SBI_PMU_OVF_CLEAR_PENDING(riscv_pmu_irq_mask);
 		enable_percpu_irq(riscv_pmu_irq, IRQ_TYPE_NONE);
 	}
 
@@ -823,8 +837,14 @@ static int pmu_sbi_setup_irqs(struct riscv_pmu *pmu, struct platform_device *pde
 		   IS_ENABLED(CONFIG_THEAD_CUSTOM_PMU)) {
 		riscv_pmu_irq_num = THEAD_C9XX_RV_IRQ_PMU;
 		riscv_pmu_use_irq = true;
+	} else if (riscv_isa_extension_available(NULL, XANDESPMU) &&
+		   IS_ENABLED(CONFIG_ANDES_CUSTOM_PMU)) {
+		riscv_pmu_irq_num = ANDES_SLI_CAUSE_BASE + ANDES_RV_IRQ_PMU;
+		riscv_pmu_use_irq = true;
 	}
 
+	riscv_pmu_irq_mask = BIT(riscv_pmu_irq_num % BITS_PER_LONG);
+
 	if (!riscv_pmu_use_irq)
 		return -EOPNOTSUPP;
 
-- 
2.34.1

[PATCH v5 09/16] dt-bindings: riscv: Add T-Head PMU extension description

[Yu Chien Peter Lin]

Document the ISA string for T-Head performance monitor extension
which provides counter overflow interrupt mechanism.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Inochi Amaoto <inochiama@outlook.com>
---
Changes v2 -> v3:
  - New patch
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - Include Guo's Reviewed-by
  - Include Inochi's Reviewed-by
  - Update to C910 documentation with its commit hash
---
 Documentation/devicetree/bindings/riscv/extensions.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index c91ab0e46648..b5cb8ac7ac80 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -258,5 +258,11 @@ properties:
             in commit 2e5236 ("Ztso is now ratified.") of the
             riscv-isa-manual.
 
+        - const: xtheadpmu
+          description:
+            The T-Head performance monitor extension for counter overflow, as ratified
+            in commit 4c4981 ("Initial commit") of Xuantie C910 user manual.
+            https://github.com/T-head-Semi/openc910/tree/main/doc
+
 additionalProperties: true
 ...
-- 
2.34.1

[PATCH v5 10/16] dt-bindings: riscv: Add Andes PMU extension description

[Yu Chien Peter Lin]

Document the ISA string for Andes Technology performance monitor
extension which provides counter overflow interrupt and mode
filtering mechanisms.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Changes v2 -> v3:
  - New patch
Changes v3 -> v4:
  - Include Conor's Acked-by
Changes v4 -> v5:
  - Include Prabhakar's Reviewed-by
---
 Documentation/devicetree/bindings/riscv/extensions.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index b5cb8ac7ac80..daef6c3b1580 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -258,6 +258,13 @@ properties:
             in commit 2e5236 ("Ztso is now ratified.") of the
             riscv-isa-manual.
 
+        - const: xandespmu
+          description:
+            The Andes Technology performance monitor extension for counter overflow
+            and privilege mode filtering. For more details, see Counter Related
+            Registers in the AX45MP datasheet.
+            https://www.andestech.com/wp-content/uploads/AX45MP-1C-Rev.-5.0.0-Datasheet.pdf
+
         - const: xtheadpmu
           description:
             The T-Head performance monitor extension for counter overflow, as ratified
-- 
2.34.1

[PATCH v5 11/16] riscv: dts: allwinner: Add T-Head PMU extension for sun20i-d1s

[Yu Chien Peter Lin]

xtheadpmu stands for T-Head Performance Monitor Unit extension.
Based on the added T-Head PMU ISA string, the SBI PMU driver
will make use of the non-standard irq source.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
---
Changes v2 -> v3:
  - New patch
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - Include Guo's Reviewed-by
---
 arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi b/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
index 64c3c2e6cbe0..7dcba86cfdd0 100644
--- a/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
@@ -27,7 +27,7 @@ cpu0: cpu@0 {
 			riscv,isa = "rv64imafdc";
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
-					       "zifencei", "zihpm";
+					       "zifencei", "zihpm", "xtheadpmu";
 			#cooling-cells = <2>;
 
 			cpu0_intc: interrupt-controller {
-- 
2.34.1

[PATCH v5 12/16] riscv: dts: sophgo: Add T-Head PMU extension for cv1800b

[Yu Chien Peter Lin]

xtheadpmu stands for T-Head Performance Monitor Unit extension.
Based on the added T-Head PMU ISA string, the SBI PMU driver
will make use of the non-standard irq source.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
---
Changes v4 -> v5:
  - New patch
---
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
index aec6401a467b..8c0143f0a01b 100644
--- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
@@ -29,7 +29,7 @@ cpu0: cpu@0 {
 			riscv,isa = "rv64imafdc";
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
-					       "zifencei", "zihpm";
+					       "zifencei", "zihpm", "xtheadpmu";
 
 			cpu0_intc: interrupt-controller {
 				compatible = "riscv,cpu-intc";
-- 
2.34.1

[PATCH v5 13/16] riscv: dts: sophgo: Add T-Head PMU extension for sg2042

[Yu Chien Peter Lin]

xtheadpmu stands for T-Head Performance Monitor Unit extension.
Based on the added T-Head PMU ISA string, the SBI PMU driver
will make use of the non-standard irq source.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
---
Changes v4 -> v5:
  - New patch
---
 arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi | 128 ++++++++++----------
 1 file changed, 64 insertions(+), 64 deletions(-)

diff --git a/arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi b/arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi
index b136b6c4128c..1d0b236f2e7a 100644
--- a/arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi
+++ b/arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi
@@ -260,7 +260,7 @@ cpu0: cpu@0 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <0>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -285,7 +285,7 @@ cpu1: cpu@1 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <1>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -310,7 +310,7 @@ cpu2: cpu@2 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <2>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -335,7 +335,7 @@ cpu3: cpu@3 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <3>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -360,7 +360,7 @@ cpu4: cpu@4 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <4>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -385,7 +385,7 @@ cpu5: cpu@5 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <5>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -410,7 +410,7 @@ cpu6: cpu@6 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <6>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -435,7 +435,7 @@ cpu7: cpu@7 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <7>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -460,7 +460,7 @@ cpu8: cpu@8 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <8>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -485,7 +485,7 @@ cpu9: cpu@9 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <9>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -510,7 +510,7 @@ cpu10: cpu@10 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <10>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -535,7 +535,7 @@ cpu11: cpu@11 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <11>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -560,7 +560,7 @@ cpu12: cpu@12 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <12>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -585,7 +585,7 @@ cpu13: cpu@13 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <13>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -610,7 +610,7 @@ cpu14: cpu@14 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <14>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -635,7 +635,7 @@ cpu15: cpu@15 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <15>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -660,7 +660,7 @@ cpu16: cpu@16 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <16>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -685,7 +685,7 @@ cpu17: cpu@17 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <17>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -710,7 +710,7 @@ cpu18: cpu@18 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <18>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -735,7 +735,7 @@ cpu19: cpu@19 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <19>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -760,7 +760,7 @@ cpu20: cpu@20 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <20>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -785,7 +785,7 @@ cpu21: cpu@21 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <21>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -810,7 +810,7 @@ cpu22: cpu@22 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <22>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -835,7 +835,7 @@ cpu23: cpu@23 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <23>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -860,7 +860,7 @@ cpu24: cpu@24 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <24>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -885,7 +885,7 @@ cpu25: cpu@25 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <25>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -910,7 +910,7 @@ cpu26: cpu@26 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <26>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -935,7 +935,7 @@ cpu27: cpu@27 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <27>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -960,7 +960,7 @@ cpu28: cpu@28 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <28>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -985,7 +985,7 @@ cpu29: cpu@29 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <29>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1010,7 +1010,7 @@ cpu30: cpu@30 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <30>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1035,7 +1035,7 @@ cpu31: cpu@31 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <31>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1060,7 +1060,7 @@ cpu32: cpu@32 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <32>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1085,7 +1085,7 @@ cpu33: cpu@33 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <33>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1110,7 +1110,7 @@ cpu34: cpu@34 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <34>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1135,7 +1135,7 @@ cpu35: cpu@35 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <35>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1160,7 +1160,7 @@ cpu36: cpu@36 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <36>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1185,7 +1185,7 @@ cpu37: cpu@37 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <37>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1210,7 +1210,7 @@ cpu38: cpu@38 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <38>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1235,7 +1235,7 @@ cpu39: cpu@39 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <39>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1260,7 +1260,7 @@ cpu40: cpu@40 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <40>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1285,7 +1285,7 @@ cpu41: cpu@41 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <41>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1310,7 +1310,7 @@ cpu42: cpu@42 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <42>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1335,7 +1335,7 @@ cpu43: cpu@43 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <43>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1360,7 +1360,7 @@ cpu44: cpu@44 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <44>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1385,7 +1385,7 @@ cpu45: cpu@45 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <45>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1410,7 +1410,7 @@ cpu46: cpu@46 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <46>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1435,7 +1435,7 @@ cpu47: cpu@47 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <47>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1460,7 +1460,7 @@ cpu48: cpu@48 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <48>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1485,7 +1485,7 @@ cpu49: cpu@49 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <49>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1510,7 +1510,7 @@ cpu50: cpu@50 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <50>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1535,7 +1535,7 @@ cpu51: cpu@51 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <51>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1560,7 +1560,7 @@ cpu52: cpu@52 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <52>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1585,7 +1585,7 @@ cpu53: cpu@53 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <53>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1610,7 +1610,7 @@ cpu54: cpu@54 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <54>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1635,7 +1635,7 @@ cpu55: cpu@55 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <55>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1660,7 +1660,7 @@ cpu56: cpu@56 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <56>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1685,7 +1685,7 @@ cpu57: cpu@57 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <57>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1710,7 +1710,7 @@ cpu58: cpu@58 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <58>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1735,7 +1735,7 @@ cpu59: cpu@59 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <59>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1760,7 +1760,7 @@ cpu60: cpu@60 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <60>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1785,7 +1785,7 @@ cpu61: cpu@61 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <61>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1810,7 +1810,7 @@ cpu62: cpu@62 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <62>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -1835,7 +1835,7 @@ cpu63: cpu@63 {
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
 					       "zicntr", "zicsr", "zifencei",
-					       "zihpm";
+					       "zihpm", "xtheadpmu";
 			reg = <63>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
-- 
2.34.1

[PATCH v5 14/16] riscv: dts: thead: Add T-Head PMU extension for th1520

[Yu Chien Peter Lin]

xtheadpmu stands for T-Head Performance Monitor Unit extension.
Based on the added T-Head PMU ISA string, the SBI PMU driver
will make use of the non-standard irq source.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
---
Changes v4 -> v5:
  - New patch
---
 arch/riscv/boot/dts/thead/th1520.dtsi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index ba4d2c673ac8..2dad2b22824a 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -22,7 +22,7 @@ c910_0: cpu@0 {
 			riscv,isa = "rv64imafdc";
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
-					       "zifencei", "zihpm";
+					       "zifencei", "zihpm", "xtheadpmu";
 			reg = <0>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -46,7 +46,7 @@ c910_1: cpu@1 {
 			riscv,isa = "rv64imafdc";
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
-					       "zifencei", "zihpm";
+					       "zifencei", "zihpm", "xtheadpmu";
 			reg = <1>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -70,7 +70,7 @@ c910_2: cpu@2 {
 			riscv,isa = "rv64imafdc";
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
-					       "zifencei", "zihpm";
+					       "zifencei", "zihpm", "xtheadpmu";
 			reg = <2>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
@@ -94,7 +94,7 @@ c910_3: cpu@3 {
 			riscv,isa = "rv64imafdc";
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
-					       "zifencei", "zihpm";
+					       "zifencei", "zihpm", "xtheadpmu";
 			reg = <3>;
 			i-cache-block-size = <64>;
 			i-cache-size = <65536>;
-- 
2.34.1

[PATCH v5 15/16] riscv: dts: renesas: Add Andes PMU extension for r9a07g043f

[Yu Chien Peter Lin]

xandespmu stands for Andes Performance Monitor Unit extension.
Based on the added Andes PMU ISA string, the SBI PMU driver
will make use of the non-standard irq source.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - No change
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - Include Geert's Reviewed-by
  - Include Prabhakar's Reviewed/Tested-by
---
 arch/riscv/boot/dts/renesas/r9a07g043f.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi b/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
index 78072e80793d..5f2f2181638a 100644
--- a/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
+++ b/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
@@ -26,7 +26,7 @@ cpu0: cpu@0 {
 			riscv,isa = "rv64imafdc";
 			riscv,isa-base = "rv64i";
 			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
-					       "zifencei", "zihpm";
+					       "zifencei", "zihpm", "xandespmu";
 			mmu-type = "riscv,sv39";
 			i-cache-size = <0x8000>;
 			i-cache-line-size = <0x40>;
-- 
2.34.1

[PATCH v5 16/16] riscv: andes: Support specifying symbolic firmware and hardware raw events

[Yu Chien Peter Lin]

From: Locus Wei-Han Chen <locus84@andestech.com>

Add the Andes AX45 JSON files that allows specifying symbolic event
names for the raw PMU events.

Signed-off-by: Locus Wei-Han Chen <locus84@andestech.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Changes v1 -> v2:
  - No change
Changes v2 -> v3:
  - No change
Changes v3 -> v4:
  - No change
Changes v4 -> v5:
  - Include Prabhakar's Tested-by
---
 .../arch/riscv/andes/ax45/firmware.json       |  68 ++++++++++
 .../arch/riscv/andes/ax45/instructions.json   | 127 ++++++++++++++++++
 .../arch/riscv/andes/ax45/memory.json         |  57 ++++++++
 .../arch/riscv/andes/ax45/microarch.json      |  77 +++++++++++
 tools/perf/pmu-events/arch/riscv/mapfile.csv  |   1 +
 5 files changed, 330 insertions(+)
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/firmware.json
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/instructions.json
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/memory.json
 create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/microarch.json

diff --git a/tools/perf/pmu-events/arch/riscv/andes/ax45/firmware.json b/tools/perf/pmu-events/arch/riscv/andes/ax45/firmware.json
new file mode 100644
index 000000000000..9b4a032186a7
--- /dev/null
+++ b/tools/perf/pmu-events/arch/riscv/andes/ax45/firmware.json
@@ -0,0 +1,68 @@
+[
+  {
+    "ArchStdEvent": "FW_MISALIGNED_LOAD"
+  },
+  {
+    "ArchStdEvent": "FW_MISALIGNED_STORE"
+  },
+  {
+    "ArchStdEvent": "FW_ACCESS_LOAD"
+  },
+  {
+    "ArchStdEvent": "FW_ACCESS_STORE"
+  },
+  {
+    "ArchStdEvent": "FW_ILLEGAL_INSN"
+  },
+  {
+    "ArchStdEvent": "FW_SET_TIMER"
+  },
+  {
+    "ArchStdEvent": "FW_IPI_SENT"
+  },
+  {
+    "ArchStdEvent": "FW_IPI_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_FENCE_I_SENT"
+  },
+  {
+    "ArchStdEvent": "FW_FENCE_I_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_SFENCE_VMA_SENT"
+  },
+  {
+    "ArchStdEvent": "FW_SFENCE_VMA_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_SFENCE_VMA_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_SFENCE_VMA_ASID_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_GVMA_SENT"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_GVMA_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_GVMA_VMID_SENT"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_GVMA_VMID_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_VVMA_SENT"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_VVMA_RECEIVED"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_VVMA_ASID_SENT"
+  },
+  {
+    "ArchStdEvent": "FW_HFENCE_VVMA_ASID_RECEIVED"
+  }
+]
diff --git a/tools/perf/pmu-events/arch/riscv/andes/ax45/instructions.json b/tools/perf/pmu-events/arch/riscv/andes/ax45/instructions.json
new file mode 100644
index 000000000000..713a08c1a40f
--- /dev/null
+++ b/tools/perf/pmu-events/arch/riscv/andes/ax45/instructions.json
@@ -0,0 +1,127 @@
+[
+	{
+		"EventCode": "0x10",
+		"EventName": "cycle_count",
+		"BriefDescription": "Cycle count"
+	},
+	{
+		"EventCode": "0x20",
+		"EventName": "inst_count",
+		"BriefDescription": "Retired instruction count"
+	},
+	{
+		"EventCode": "0x30",
+		"EventName": "int_load_inst",
+		"BriefDescription": "Integer load instruction count"
+	},
+	{
+		"EventCode": "0x40",
+		"EventName": "int_store_inst",
+		"BriefDescription": "Integer store instruction count"
+	},
+	{
+		"EventCode": "0x50",
+		"EventName": "atomic_inst",
+		"BriefDescription": "Atomic instruction count"
+	},
+	{
+		"EventCode": "0x60",
+		"EventName": "sys_inst",
+		"BriefDescription": "System instruction count"
+	},
+	{
+		"EventCode": "0x70",
+		"EventName": "int_compute_inst",
+		"BriefDescription": "Integer computational instruction count"
+	},
+	{
+		"EventCode": "0x80",
+		"EventName": "condition_br",
+		"BriefDescription": "Conditional branch instruction count"
+	},
+	{
+		"EventCode": "0x90",
+		"EventName": "taken_condition_br",
+		"BriefDescription": "Taken conditional branch instruction count"
+	},
+	{
+		"EventCode": "0xA0",
+		"EventName": "jal_inst",
+		"BriefDescription": "JAL instruction count"
+	},
+	{
+		"EventCode": "0xB0",
+		"EventName": "jalr_inst",
+		"BriefDescription": "JALR instruction count"
+	},
+	{
+		"EventCode": "0xC0",
+		"EventName": "ret_inst",
+		"BriefDescription": "Return instruction count"
+	},
+	{
+		"EventCode": "0xD0",
+		"EventName": "control_trans_inst",
+		"BriefDescription": "Control transfer instruction count"
+	},
+	{
+		"EventCode": "0xE0",
+		"EventName": "ex9_inst",
+		"BriefDescription": "EXEC.IT instruction count"
+	},
+	{
+		"EventCode": "0xF0",
+		"EventName": "int_mul_inst",
+		"BriefDescription": "Integer multiplication instruction count"
+	},
+	{
+		"EventCode": "0x100",
+		"EventName": "int_div_rem_inst",
+		"BriefDescription": "Integer division/remainder instruction count"
+	},
+	{
+		"EventCode": "0x110",
+		"EventName": "float_load_inst",
+		"BriefDescription": "Floating-point load instruction count"
+	},
+	{
+		"EventCode": "0x120",
+		"EventName": "float_store_inst",
+		"BriefDescription": "Floating-point store instruction count"
+	},
+	{
+		"EventCode": "0x130",
+		"EventName": "float_add_sub_inst",
+		"BriefDescription": "Floating-point addition/subtraction instruction count"
+	},
+	{
+		"EventCode": "0x140",
+		"EventName": "float_mul_inst",
+		"BriefDescription": "Floating-point multiplication instruction count"
+	},
+	{
+		"EventCode": "0x150",
+		"EventName": "float_fused_muladd_inst",
+		"BriefDescription": "Floating-point fused multiply-add instruction count"
+	},
+	{
+		"EventCode": "0x160",
+		"EventName": "float_div_sqrt_inst",
+		"BriefDescription": "Floating-point division or square-root instruction count"
+	},
+	{
+		"EventCode": "0x170",
+		"EventName": "other_float_inst",
+		"BriefDescription": "Other floating-point instruction count"
+	},
+	{
+		"EventCode": "0x180",
+		"EventName": "int_mul_add_sub_inst",
+		"BriefDescription": "Integer multiplication and add/sub instruction count"
+	},
+	{
+		"EventCode": "0x190",
+		"EventName": "retired_ops",
+		"BriefDescription": "Retired operation count"
+	}
+]
diff --git a/tools/perf/pmu-events/arch/riscv/andes/ax45/memory.json b/tools/perf/pmu-events/arch/riscv/andes/ax45/memory.json
new file mode 100644
index 000000000000..c7401b526c77
--- /dev/null
+++ b/tools/perf/pmu-events/arch/riscv/andes/ax45/memory.json
@@ -0,0 +1,57 @@
+[
+	{
+		"EventCode": "0x01",
+		"EventName": "ilm_access",
+		"BriefDescription": "ILM access"
+	},
+	{
+		"EventCode": "0x11",
+		"EventName": "dlm_access",
+		"BriefDescription": "DLM access"
+	},
+	{
+		"EventCode": "0x21",
+		"EventName": "icache_access",
+		"BriefDescription": "ICACHE access"
+	},
+	{
+		"EventCode": "0x31",
+		"EventName": "icache_miss",
+		"BriefDescription": "ICACHE miss"
+	},
+	{
+		"EventCode": "0x41",
+		"EventName": "dcache_access",
+		"BriefDescription": "DCACHE access"
+	},
+	{
+		"EventCode": "0x51",
+		"EventName": "dcache_miss",
+		"BriefDescription": "DCACHE miss"
+	},
+	{
+		"EventCode": "0x61",
+		"EventName": "dcache_load_access",
+		"BriefDescription": "DCACHE load access"
+	},
+	{
+		"EventCode": "0x71",
+		"EventName": "dcache_load_miss",
+		"BriefDescription": "DCACHE load miss"
+	},
+	{
+		"EventCode": "0x81",
+		"EventName": "dcache_store_access",
+		"BriefDescription": "DCACHE store access"
+	},
+	{
+		"EventCode": "0x91",
+		"EventName": "dcache_store_miss",
+		"BriefDescription": "DCACHE store miss"
+	},
+	{
+		"EventCode": "0xA1",
+		"EventName": "dcache_wb",
+		"BriefDescription": "DCACHE writeback"
+	}
+]
diff --git a/tools/perf/pmu-events/arch/riscv/andes/ax45/microarch.json b/tools/perf/pmu-events/arch/riscv/andes/ax45/microarch.json
new file mode 100644
index 000000000000..a6d378cbaa74
--- /dev/null
+++ b/tools/perf/pmu-events/arch/riscv/andes/ax45/microarch.json
@@ -0,0 +1,77 @@
+[
+	{
+		"EventCode": "0xB1",
+		"EventName": "cycle_wait_icache_fill",
+		"BriefDescription": "Cycles waiting for ICACHE fill data"
+	},
+	{
+		"EventCode": "0xC1",
+		"EventName": "cycle_wait_dcache_fill",
+		"BriefDescription": "Cycles waiting for DCACHE fill data"
+	},
+	{
+		"EventCode": "0xD1",
+		"EventName": "uncached_ifetch_from_bus",
+		"BriefDescription": "Uncached ifetch data access from bus"
+	},
+	{
+		"EventCode": "0xE1",
+		"EventName": "uncached_load_from_bus",
+		"BriefDescription": "Uncached load data access from bus"
+	},
+	{
+		"EventCode": "0xF1",
+		"EventName": "cycle_wait_uncached_ifetch",
+		"BriefDescription": "Cycles waiting for uncached ifetch data from bus"
+	},
+	{
+		"EventCode": "0x101",
+		"EventName": "cycle_wait_uncached_load",
+		"BriefDescription": "Cycles waiting for uncached load data from bus"
+	},
+	{
+		"EventCode": "0x111",
+		"EventName": "main_itlb_access",
+		"BriefDescription": "Main ITLB access"
+	},
+	{
+		"EventCode": "0x121",
+		"EventName": "main_itlb_miss",
+		"BriefDescription": "Main ITLB miss"
+	},
+	{
+		"EventCode": "0x131",
+		"EventName": "main_dtlb_access",
+		"BriefDescription": "Main DTLB access"
+	},
+	{
+		"EventCode": "0x141",
+		"EventName": "main_dtlb_miss",
+		"BriefDescription": "Main DTLB miss"
+	},
+	{
+		"EventCode": "0x151",
+		"EventName": "cycle_wait_itlb_fill",
+		"BriefDescription": "Cycles waiting for Main ITLB fill data"
+	},
+	{
+		"EventCode": "0x161",
+		"EventName": "pipe_stall_cycle_dtlb_miss",
+		"BriefDescription": "Pipeline stall cycles caused by Main DTLB miss"
+	},
+	{
+		"EventCode": "0x02",
+		"EventName": "mispredict_condition_br",
+		"BriefDescription": "Misprediction of conditional branches"
+	},
+	{
+		"EventCode": "0x12",
+		"EventName": "mispredict_take_condition_br",
+		"BriefDescription": "Misprediction of taken conditional branches"
+	},
+	{
+		"EventCode": "0x22",
+		"EventName": "mispredict_target_ret_inst",
+		"BriefDescription": "Misprediction of targets of Return instructions"
+	}
+]
diff --git a/tools/perf/pmu-events/arch/riscv/mapfile.csv b/tools/perf/pmu-events/arch/riscv/mapfile.csv
index c61b3d6ef616..5bf09af14c1b 100644
--- a/tools/perf/pmu-events/arch/riscv/mapfile.csv
+++ b/tools/perf/pmu-events/arch/riscv/mapfile.csv
@@ -15,3 +15,4 @@
 #
 #MVENDORID-MARCHID-MIMPID,Version,Filename,EventType
 0x489-0x8000000000000007-0x[[:xdigit:]]+,v1,sifive/u74,core
+0x31e-0x8000000000008a45-0x[[:xdigit:]]+,v1,andes/ax45,core
-- 
2.34.1

Re: [PATCH v5 02/16] irqchip/riscv-intc: Allow large non-standard interrupt number

[Anup Patel]

On Wed, Dec 13, 2023 at 12:34 PM Yu Chien Peter Lin
<peterlin@andestech.com> wrote:
>
> Currently, the implementation of the RISC-V INTC driver uses the
> interrupt cause as hardware interrupt number and has a limitation of
> supporting a maximum of 64 interrupts. However, according to the
> privileged spec, interrupt causes >= 16 are defined for platform use.

I disagree with this patch.

Even though RISC-V priv sepc allows interrupt causes >= 16, we
still need CSRs to manage arbitrary local interrupts

Currently, we have following standard CSRs:
1) [m|s]ie and [m|s]ip which are XLEN wide
2) With AIA, we have [m|s]ieh and [m|s]iph for RV32

Clearly, we can only have a XLEN number of standard local
interrupts without AIA and 64 local interrupts with AIA.

Now for implementations with custom CSRs (such as Andes),
we still can't assume infinite local interrupts because HW will
have a finite number of custom CSRs.

>
> This limitation prevents to fully utilize the available local interrupt
> sources. Additionally, the interrupt number used on RISC-V are sparse,
> with only interrupt numbers 1, 5 and 9 (plus Sscofpmf or T-Head's PMU
> interrupt) being currently used for supervisor mode.
>
> Switch to using irq_domain_create_tree() to create the radix tree
> map, so a larger number of hardware interrupts can be handled.
>
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
> ---
> Changes v1 -> v2:
>   - Fixed irq mapping failure checking (suggested by Clément and Anup)
> Changes v2 -> v3:
>   - No change
> Changes v3 -> v4: (Suggested by Thomas [1])
>   - Use pr_warn_ratelimited instead
>   - Fix coding style and commit message
> Changes v4 -> v5: (Suggested by Thomas)
>   - Fix commit message
>
> [1] https://patchwork.kernel.org/project/linux-riscv/patch/20231023004100.2663486-3-peterlin@andestech.com/#25573085
> ---
>  drivers/irqchip/irq-riscv-intc.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> index e8d01b14ccdd..2fdd40f2a791 100644
> --- a/drivers/irqchip/irq-riscv-intc.c
> +++ b/drivers/irqchip/irq-riscv-intc.c
> @@ -24,10 +24,9 @@ static asmlinkage void riscv_intc_irq(struct pt_regs *regs)
>  {
>         unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;
>
> -       if (unlikely(cause >= BITS_PER_LONG))
> -               panic("unexpected interrupt cause");
> -
> -       generic_handle_domain_irq(intc_domain, cause);
> +       if (generic_handle_domain_irq(intc_domain, cause))
> +               pr_warn_ratelimited("Failed to handle interrupt (cause: %ld)\n",
> +                                   cause);
>  }
>
>  /*
> @@ -117,8 +116,7 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
>  {
>         int rc;
>
> -       intc_domain = irq_domain_create_linear(fn, BITS_PER_LONG,
> -                                              &riscv_intc_domain_ops, NULL);
> +       intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, NULL);

I disagree with this change based on the reasoning above.

Instead of this, we should determine the number of local interrupts
based on the type of RISC-V intc:
1) For standard INTC without AIA, we have XLEN (or BITS_PER_LONG)
    local interrupts
2) For standart INTC with AIA, we have 64 local interrupts
3) For custom INTC (such as Andes), the number of local interrupt
    should be custom (Andes specific) which can be determined based
    on compatible string.

Also, creating a linear domain with a fixed number of local interrupts
ensures that drivers can't map a local interrupt beyond the availability
of CSRs to manage it.

>         if (!intc_domain) {
>                 pr_err("unable to add IRQ domain\n");
>                 return -ENXIO;
> @@ -132,8 +130,6 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
>
>         riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
>
> -       pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
> -

Same as above, we should definitely advertise the type of INTC and
number of local interrupts mapped.

Regards,
Anup

>         return 0;
>  }
>
> --
> 2.34.1
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

Re: [PATCH v5 03/16] irqchip/riscv-intc: Introduce Andes hart-level interrupt controller

[Anup Patel]

On Wed, Dec 13, 2023 at 12:35 PM Yu Chien Peter Lin
<peterlin@andestech.com> wrote:
>
> Add support for the Andes hart-level interrupt controller. This
> controller provides interrupt mask/unmask functions to access the
> custom register (SLIE) where the non-standard S-mode local interrupt
> enable bits are located.
>
> To share the riscv_intc_domain_map() with the generic RISC-V INTC and
> ACPI, add a chip parameter to riscv_intc_init_common(), so it can be
> passed to the irq_domain_set_info() as private data.
>
> Andes hart-level interrupt controller requires the "andestech,cpu-intc"
> compatible string to be present in interrupt-controller of cpu node.
> e.g.,
>
>   cpu0: cpu@0 {
>       compatible = "andestech,ax45mp", "riscv";
>       ...
>       cpu0-intc: interrupt-controller {
>           #interrupt-cells = <0x01>;
>           compatible = "andestech,cpu-intc", "riscv,cpu-intc";
>           interrupt-controller;
>       };
>   };
>
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
> ---
> Changes v1 -> v2:
>   - New patch
> Changes v2 -> v3:
>   - Return -ENXIO if no valid compatible INTC found
>   - Allow falling back to generic RISC-V INTC
> Changes v3 -> v4: (Suggested by Thomas [1])
>   - Add comment to andes irq chip function
>   - Refine code flow to share with generic RISC-V INTC and ACPI
>   - Move Andes specific definitions to include/linux/soc/andes/irq.h
> Changes v4 -> v5: (Suggested by Thomas)
>   - Fix commit message
>   - Subtract ANDES_SLI_CAUSE_BASE from d->hwirq to calculate the value of mask
>   - Do not set chip_data to the chip itself with irq_domain_set_info()
>   - Follow reverse fir tree order variable declarations
>
> [1] https://patchwork.kernel.org/project/linux-riscv/patch/20231019135723.3657156-1-peterlin@andestech.com/
> ---
>  drivers/irqchip/irq-riscv-intc.c | 53 ++++++++++++++++++++++++++++----
>  include/linux/soc/andes/irq.h    | 17 ++++++++++
>  2 files changed, 64 insertions(+), 6 deletions(-)
>  create mode 100644 include/linux/soc/andes/irq.h
>
> diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> index 2fdd40f2a791..0b6bf3fb1dba 100644
> --- a/drivers/irqchip/irq-riscv-intc.c
> +++ b/drivers/irqchip/irq-riscv-intc.c
> @@ -17,6 +17,7 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/smp.h>
> +#include <linux/soc/andes/irq.h>
>
>  static struct irq_domain *intc_domain;
>
> @@ -46,6 +47,31 @@ static void riscv_intc_irq_unmask(struct irq_data *d)
>         csr_set(CSR_IE, BIT(d->hwirq));
>  }
>
> +static void andes_intc_irq_mask(struct irq_data *d)
> +{
> +       /*
> +        * Andes specific S-mode local interrupt causes (hwirq)
> +        * are defined as (256 + n) and controlled by n-th bit
> +        * of SLIE.
> +        */
> +       unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
> +
> +       if (d->hwirq < ANDES_SLI_CAUSE_BASE)
> +               csr_clear(CSR_IE, mask);
> +       else
> +               csr_clear(ANDES_CSR_SLIE, mask);
> +}
> +
> +static void andes_intc_irq_unmask(struct irq_data *d)
> +{
> +       unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
> +
> +       if (d->hwirq < ANDES_SLI_CAUSE_BASE)
> +               csr_set(CSR_IE, mask);
> +       else
> +               csr_set(ANDES_CSR_SLIE, mask);

Clearly, Andes does not have any CSR for:
XLEN <= local interrupt <ANDES_SLI_CAUSE_BASE
and
ANDES_SLI_CAUSE_BASE + XLEN <= local interrupt

Regards,
Anup

> +}
> +
>  static void riscv_intc_irq_eoi(struct irq_data *d)
>  {
>         /*
> @@ -69,11 +95,20 @@ static struct irq_chip riscv_intc_chip = {
>         .irq_eoi = riscv_intc_irq_eoi,
>  };
>
> +static struct irq_chip andes_intc_chip = {
> +       .name       = "RISC-V INTC",
> +       .irq_mask   = andes_intc_irq_mask,
> +       .irq_unmask = andes_intc_irq_unmask,
> +       .irq_eoi    = riscv_intc_irq_eoi,
> +};
> +
>  static int riscv_intc_domain_map(struct irq_domain *d, unsigned int irq,
>                                  irq_hw_number_t hwirq)
>  {
> +       struct irq_chip *chip = d->host_data;
> +
>         irq_set_percpu_devid(irq);
> -       irq_domain_set_info(d, irq, hwirq, &riscv_intc_chip, d->host_data,
> +       irq_domain_set_info(d, irq, hwirq, chip, NULL,
>                             handle_percpu_devid_irq, NULL, NULL);
>
>         return 0;
> @@ -112,11 +147,12 @@ static struct fwnode_handle *riscv_intc_hwnode(void)
>         return intc_domain->fwnode;
>  }
>
> -static int __init riscv_intc_init_common(struct fwnode_handle *fn)
> +static int __init riscv_intc_init_common(struct fwnode_handle *fn,
> +                                        struct irq_chip *chip)
>  {
>         int rc;
>
> -       intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, NULL);
> +       intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, chip);
>         if (!intc_domain) {
>                 pr_err("unable to add IRQ domain\n");
>                 return -ENXIO;
> @@ -136,8 +172,9 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
>  static int __init riscv_intc_init(struct device_node *node,
>                                   struct device_node *parent)
>  {
> -       int rc;
> +       struct irq_chip *chip = &riscv_intc_chip;
>         unsigned long hartid;
> +       int rc;
>
>         rc = riscv_of_parent_hartid(node, &hartid);
>         if (rc < 0) {
> @@ -162,10 +199,14 @@ static int __init riscv_intc_init(struct device_node *node,
>                 return 0;
>         }
>
> -       return riscv_intc_init_common(of_node_to_fwnode(node));
> +       if (of_device_is_compatible(node, "andestech,cpu-intc"))
> +               chip = &andes_intc_chip;
> +
> +       return riscv_intc_init_common(of_node_to_fwnode(node), chip);
>  }
>
>  IRQCHIP_DECLARE(riscv, "riscv,cpu-intc", riscv_intc_init);
> +IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init);
>
>  #ifdef CONFIG_ACPI
>
> @@ -192,7 +233,7 @@ static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
>                 return -ENOMEM;
>         }
>
> -       return riscv_intc_init_common(fn);
> +       return riscv_intc_init_common(fn, &riscv_intc_chip);
>  }
>
>  IRQCHIP_ACPI_DECLARE(riscv_intc, ACPI_MADT_TYPE_RINTC, NULL,
> diff --git a/include/linux/soc/andes/irq.h b/include/linux/soc/andes/irq.h
> new file mode 100644
> index 000000000000..f03e68fea261
> --- /dev/null
> +++ b/include/linux/soc/andes/irq.h
> @@ -0,0 +1,17 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2023 Andes Technology Corporation
> + */
> +#ifndef __ANDES_IRQ_H
> +#define __ANDES_IRQ_H
> +
> +/* Andes PMU irq number */
> +#define ANDES_RV_IRQ_PMU               18
> +#define ANDES_SLI_CAUSE_BASE           256
> +
> +/* Andes PMU related registers */
> +#define ANDES_CSR_SLIE                 0x9c4
> +#define ANDES_CSR_SLIP                 0x9c5
> +#define ANDES_CSR_SCOUNTEROF           0x9d4
> +
> +#endif /* __ANDES_IRQ_H */
> --
> 2.34.1
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

Re: [PATCH v5 02/16] irqchip/riscv-intc: Allow large non-standard interrupt number

[Anup Patel]

On Wed, Dec 13, 2023 at 7:58 PM Anup Patel <apatel@ventanamicro.com> wrote:
>
> On Wed, Dec 13, 2023 at 12:34 PM Yu Chien Peter Lin
> <peterlin@andestech.com> wrote:
> >
> > Currently, the implementation of the RISC-V INTC driver uses the
> > interrupt cause as hardware interrupt number and has a limitation of
> > supporting a maximum of 64 interrupts. However, according to the
> > privileged spec, interrupt causes >= 16 are defined for platform use.
>
> I disagree with this patch.
>
> Even though RISC-V priv sepc allows interrupt causes >= 16, we
> still need CSRs to manage arbitrary local interrupts
>
> Currently, we have following standard CSRs:
> 1) [m|s]ie and [m|s]ip which are XLEN wide
> 2) With AIA, we have [m|s]ieh and [m|s]iph for RV32
>
> Clearly, we can only have a XLEN number of standard local
> interrupts without AIA and 64 local interrupts with AIA.
>
> Now for implementations with custom CSRs (such as Andes),
> we still can't assume infinite local interrupts because HW will
> have a finite number of custom CSRs.
>
> >
> > This limitation prevents to fully utilize the available local interrupt
> > sources. Additionally, the interrupt number used on RISC-V are sparse,
> > with only interrupt numbers 1, 5 and 9 (plus Sscofpmf or T-Head's PMU
> > interrupt) being currently used for supervisor mode.
> >
> > Switch to using irq_domain_create_tree() to create the radix tree
> > map, so a larger number of hardware interrupts can be handled.
> >
> > Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> > Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
> > Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
> > ---
> > Changes v1 -> v2:
> >   - Fixed irq mapping failure checking (suggested by Clément and Anup)
> > Changes v2 -> v3:
> >   - No change
> > Changes v3 -> v4: (Suggested by Thomas [1])
> >   - Use pr_warn_ratelimited instead
> >   - Fix coding style and commit message
> > Changes v4 -> v5: (Suggested by Thomas)
> >   - Fix commit message
> >
> > [1] https://patchwork.kernel.org/project/linux-riscv/patch/20231023004100.2663486-3-peterlin@andestech.com/#25573085
> > ---
> >  drivers/irqchip/irq-riscv-intc.c | 12 ++++--------
> >  1 file changed, 4 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> > index e8d01b14ccdd..2fdd40f2a791 100644
> > --- a/drivers/irqchip/irq-riscv-intc.c
> > +++ b/drivers/irqchip/irq-riscv-intc.c
> > @@ -24,10 +24,9 @@ static asmlinkage void riscv_intc_irq(struct pt_regs *regs)
> >  {
> >         unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;
> >
> > -       if (unlikely(cause >= BITS_PER_LONG))
> > -               panic("unexpected interrupt cause");
> > -
> > -       generic_handle_domain_irq(intc_domain, cause);
> > +       if (generic_handle_domain_irq(intc_domain, cause))
> > +               pr_warn_ratelimited("Failed to handle interrupt (cause: %ld)\n",
> > +                                   cause);
> >  }
> >
> >  /*
> > @@ -117,8 +116,7 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
> >  {
> >         int rc;
> >
> > -       intc_domain = irq_domain_create_linear(fn, BITS_PER_LONG,
> > -                                              &riscv_intc_domain_ops, NULL);
> > +       intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, NULL);
>
> I disagree with this change based on the reasoning above.
>
> Instead of this, we should determine the number of local interrupts
> based on the type of RISC-V intc:
> 1) For standard INTC without AIA, we have XLEN (or BITS_PER_LONG)
>     local interrupts
> 2) For standart INTC with AIA, we have 64 local interrupts
> 3) For custom INTC (such as Andes), the number of local interrupt
>     should be custom (Andes specific) which can be determined based
>     on compatible string.
>
> Also, creating a linear domain with a fixed number of local interrupts
> ensures that drivers can't map a local interrupt beyond the availability
> of CSRs to manage it.

Thinking about this more. We do have a problem because Andes local
interrupts are really sparse which is not the case for standard local
interrupts

I have an alternate suggestion which goes as follows ...

We use irq_domain_create_tree() in-place of irq_domain_create_linear()
and enforce checks on hwirq in riscv_intc_domain_alloc() to ensure that
we only allow hwirq for which we have corresponding standard or custom
CSR.

To achieve this, riscv_intc_init_common() will have to save the following
as static global variables:
1) riscv_intc_nr_irqs: Number of standard local interrupts
2) riscv_intc_custom_base and riscv_intc_custom_nr_irqs: Base and
    number of custom local interrupts.

Using the above static global variables, the riscv_intc_domain_alloc()
can return error if one of the following conditions are met:
1) riscv_intc_nr_irqs<= hwirq && hwirq < riscv_intc_custom_base
2) (riscv_intc_custom_base + riscv_intc_custom_nr_irqs) <= hwirq

For standard INTC, we can set the static global variable as follows:
riscv_intc_nr_irqs = XLEN or BITS_PER_LONG
riscv_intc_custom_base = riscv_intc_nr_irqs
riscv_intc_custom_nr_irqs = 0

For Andes INTC, we can set the static global variables as follows:
riscv_intc_nr_irqs = XLEN or BITS_PER_LONG
riscv_intc_custom_base = 256
riscv_intc_custom_nr_irqs = XLEN or BITS_PER_LONG

Regards,
Anup

>
> >         if (!intc_domain) {
> >                 pr_err("unable to add IRQ domain\n");
> >                 return -ENXIO;
> > @@ -132,8 +130,6 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
> >
> >         riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
> >
> > -       pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
> > -
>
> Same as above, we should definitely advertise the type of INTC and
> number of local interrupts mapped.
>
> Regards,
> Anup
>
> >         return 0;
> >  }
> >
> > --
> > 2.34.1
> >
> >
> > _______________________________________________
> > linux-riscv mailing list
> > linux-riscv@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-riscv

Re: [PATCH v5 12/16] riscv: dts: sophgo: Add T-Head PMU extension for cv1800b

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 1160 bytes --]

On Wed, Dec 13, 2023 at 03:02:57PM +0800, Yu Chien Peter Lin wrote:
> xtheadpmu stands for T-Head Performance Monitor Unit extension.
> Based on the added T-Head PMU ISA string, the SBI PMU driver
> will make use of the non-standard irq source.
> 
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.

> ---
> Changes v4 -> v5:
>   - New patch
> ---
>  arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> index aec6401a467b..8c0143f0a01b 100644
> --- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> +++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> @@ -29,7 +29,7 @@ cpu0: cpu@0 {
>  			riscv,isa = "rv64imafdc";
>  			riscv,isa-base = "rv64i";
>  			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
> -					       "zifencei", "zihpm";
> +					       "zifencei", "zihpm", "xtheadpmu";
>  
>  			cpu0_intc: interrupt-controller {
>  				compatible = "riscv,cpu-intc";
> -- 
> 2.34.1
> 

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH v5 14/16] riscv: dts: thead: Add T-Head PMU extension for th1520

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 2214 bytes --]

On Wed, Dec 13, 2023 at 03:02:59PM +0800, Yu Chien Peter Lin wrote:
> xtheadpmu stands for T-Head Performance Monitor Unit extension.
> Based on the added T-Head PMU ISA string, the SBI PMU driver
> will make use of the non-standard irq source.
> 
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.

> ---
> Changes v4 -> v5:
>   - New patch
> ---
>  arch/riscv/boot/dts/thead/th1520.dtsi | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
> index ba4d2c673ac8..2dad2b22824a 100644
> --- a/arch/riscv/boot/dts/thead/th1520.dtsi
> +++ b/arch/riscv/boot/dts/thead/th1520.dtsi
> @@ -22,7 +22,7 @@ c910_0: cpu@0 {
>  			riscv,isa = "rv64imafdc";
>  			riscv,isa-base = "rv64i";
>  			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
> -					       "zifencei", "zihpm";
> +					       "zifencei", "zihpm", "xtheadpmu";
>  			reg = <0>;
>  			i-cache-block-size = <64>;
>  			i-cache-size = <65536>;
> @@ -46,7 +46,7 @@ c910_1: cpu@1 {
>  			riscv,isa = "rv64imafdc";
>  			riscv,isa-base = "rv64i";
>  			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
> -					       "zifencei", "zihpm";
> +					       "zifencei", "zihpm", "xtheadpmu";
>  			reg = <1>;
>  			i-cache-block-size = <64>;
>  			i-cache-size = <65536>;
> @@ -70,7 +70,7 @@ c910_2: cpu@2 {
>  			riscv,isa = "rv64imafdc";
>  			riscv,isa-base = "rv64i";
>  			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
> -					       "zifencei", "zihpm";
> +					       "zifencei", "zihpm", "xtheadpmu";
>  			reg = <2>;
>  			i-cache-block-size = <64>;
>  			i-cache-size = <65536>;
> @@ -94,7 +94,7 @@ c910_3: cpu@3 {
>  			riscv,isa = "rv64imafdc";
>  			riscv,isa-base = "rv64i";
>  			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
> -					       "zifencei", "zihpm";
> +					       "zifencei", "zihpm", "xtheadpmu";
>  			reg = <3>;
>  			i-cache-block-size = <64>;
>  			i-cache-size = <65536>;
> -- 
> 2.34.1
> 

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH v5 13/16] riscv: dts: sophgo: Add T-Head PMU extension for sg2042

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 391 bytes --]

On Wed, Dec 13, 2023 at 03:02:58PM +0800, Yu Chien Peter Lin wrote:
> xtheadpmu stands for T-Head Performance Monitor Unit extension.
> Based on the added T-Head PMU ISA string, the SBI PMU driver
> will make use of the non-standard irq source.
> 
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.


[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH v5 15/16] riscv: dts: renesas: Add Andes PMU extension for r9a07g043f

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 590 bytes --]

On Wed, Dec 13, 2023 at 03:03:00PM +0800, Yu Chien Peter Lin wrote:
> xandespmu stands for Andes Performance Monitor Unit extension.
> Based on the added Andes PMU ISA string, the SBI PMU driver
> will make use of the non-standard irq source.
> 
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH v5 09/16] dt-bindings: riscv: Add T-Head PMU extension description

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 1722 bytes --]

On Wed, Dec 13, 2023 at 03:02:54PM +0800, Yu Chien Peter Lin wrote:
> Document the ISA string for T-Head performance monitor extension
> which provides counter overflow interrupt mechanism.
> 
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> Reviewed-by: Guo Ren <guoren@kernel.org>
> Reviewed-by: Inochi Amaoto <inochiama@outlook.com>
> ---
> Changes v2 -> v3:
>   - New patch
> Changes v3 -> v4:
>   - No change
> Changes v4 -> v5:
>   - Include Guo's Reviewed-by
>   - Include Inochi's Reviewed-by
>   - Update to C910 documentation with its commit hash
> ---
>  Documentation/devicetree/bindings/riscv/extensions.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
> index c91ab0e46648..b5cb8ac7ac80 100644
> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml
> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
> @@ -258,5 +258,11 @@ properties:
>              in commit 2e5236 ("Ztso is now ratified.") of the
>              riscv-isa-manual.
>  
> +        - const: xtheadpmu
> +          description:
> +            The T-Head performance monitor extension for counter overflow, as ratified

I'm not sure that "ratified" here is the right word, probably
"documented" is better, but I don't think that is worth a resend.

Acked-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.

> +            in commit 4c4981 ("Initial commit") of Xuantie C910 user manual.
> +            https://github.com/T-head-Semi/openc910/tree/main/doc
> +
>  additionalProperties: true
>  ...
> -- 
> 2.34.1
> 

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH v5 07/16] RISC-V: Move T-Head PMU to CPU feature alternative framework

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 740 bytes --]

On Wed, Dec 13, 2023 at 03:02:52PM +0800, Yu Chien Peter Lin wrote:
> The custom PMU extension aims to support perf event sampling prior
> to the ratification of Sscofpmf. Instead of diverting the bits and
> register reserved for future standard, a set of custom registers is
> added.  Hence, we may consider it as a CPU feature rather than an
> erratum.
> 
> T-Head cores need to append "xtheadpmu" to the riscv,isa-extensions
> for each cpu node in device tree, and enable CONFIG_THEAD_CUSTOM_PMU
> for proper functioning as of this commit.
> 
> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> Reviewed-by: Guo Ren <guoren@kernel.org>

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH v5 07/16] RISC-V: Move T-Head PMU to CPU feature alternative framework

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 1296 bytes --]

On Wed, Dec 13, 2023 at 03:27:25PM +0000, Conor Dooley wrote:
> On Wed, Dec 13, 2023 at 03:02:52PM +0800, Yu Chien Peter Lin wrote:
> > The custom PMU extension aims to support perf event sampling prior
> > to the ratification of Sscofpmf. Instead of diverting the bits and
> > register reserved for future standard, a set of custom registers is
> > added.  Hence, we may consider it as a CPU feature rather than an
> > erratum.
> > 
> > T-Head cores need to append "xtheadpmu" to the riscv,isa-extensions
> > for each cpu node in device tree, and enable CONFIG_THEAD_CUSTOM_PMU
> > for proper functioning as of this commit.
> > 
> > Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> > Reviewed-by: Guo Ren <guoren@kernel.org>
> 
> Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

I think it is also worth mentioning that the only SoC, to my knowledge,
that works with a mainline kernel, and supports the SBI PMU is the D1,
and only recently has the OpenSBI port for the SoC been fixed to
actually work correctly, and that has apparently not yet made it to
a release of OpenSBI, making the "damage" caused by requiring a DT
property for PMU support not all that bad since the firmware needs to be
changed anyway.

Thanks for your work on this,
Conor.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH v5 03/16] irqchip/riscv-intc: Introduce Andes hart-level interrupt controller

[Yu-Chien Peter Lin]

On Wed, Dec 13, 2023 at 08:15:28PM +0530, Anup Patel wrote:
> On Wed, Dec 13, 2023 at 12:35 PM Yu Chien Peter Lin
> <peterlin@andestech.com> wrote:
> >
> > Add support for the Andes hart-level interrupt controller. This
> > controller provides interrupt mask/unmask functions to access the
> > custom register (SLIE) where the non-standard S-mode local interrupt
> > enable bits are located.
> >
> > To share the riscv_intc_domain_map() with the generic RISC-V INTC and
> > ACPI, add a chip parameter to riscv_intc_init_common(), so it can be
> > passed to the irq_domain_set_info() as private data.
> >
> > Andes hart-level interrupt controller requires the "andestech,cpu-intc"
> > compatible string to be present in interrupt-controller of cpu node.
> > e.g.,
> >
> >   cpu0: cpu@0 {
> >       compatible = "andestech,ax45mp", "riscv";
> >       ...
> >       cpu0-intc: interrupt-controller {
> >           #interrupt-cells = <0x01>;
> >           compatible = "andestech,cpu-intc", "riscv,cpu-intc";
> >           interrupt-controller;
> >       };
> >   };
> >
> > Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> > Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
> > Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
> > ---
> > Changes v1 -> v2:
> >   - New patch
> > Changes v2 -> v3:
> >   - Return -ENXIO if no valid compatible INTC found
> >   - Allow falling back to generic RISC-V INTC
> > Changes v3 -> v4: (Suggested by Thomas [1])
> >   - Add comment to andes irq chip function
> >   - Refine code flow to share with generic RISC-V INTC and ACPI
> >   - Move Andes specific definitions to include/linux/soc/andes/irq.h
> > Changes v4 -> v5: (Suggested by Thomas)
> >   - Fix commit message
> >   - Subtract ANDES_SLI_CAUSE_BASE from d->hwirq to calculate the value of mask
> >   - Do not set chip_data to the chip itself with irq_domain_set_info()
> >   - Follow reverse fir tree order variable declarations
> >
> > [1] https://patchwork.kernel.org/project/linux-riscv/patch/20231019135723.3657156-1-peterlin@andestech.com/
> > ---
> >  drivers/irqchip/irq-riscv-intc.c | 53 ++++++++++++++++++++++++++++----
> >  include/linux/soc/andes/irq.h    | 17 ++++++++++
> >  2 files changed, 64 insertions(+), 6 deletions(-)
> >  create mode 100644 include/linux/soc/andes/irq.h
> >
> > diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> > index 2fdd40f2a791..0b6bf3fb1dba 100644
> > --- a/drivers/irqchip/irq-riscv-intc.c
> > +++ b/drivers/irqchip/irq-riscv-intc.c
> > @@ -17,6 +17,7 @@
> >  #include <linux/module.h>
> >  #include <linux/of.h>
> >  #include <linux/smp.h>
> > +#include <linux/soc/andes/irq.h>
> >
> >  static struct irq_domain *intc_domain;
> >
> > @@ -46,6 +47,31 @@ static void riscv_intc_irq_unmask(struct irq_data *d)
> >         csr_set(CSR_IE, BIT(d->hwirq));
> >  }
> >
> > +static void andes_intc_irq_mask(struct irq_data *d)
> > +{
> > +       /*
> > +        * Andes specific S-mode local interrupt causes (hwirq)
> > +        * are defined as (256 + n) and controlled by n-th bit
> > +        * of SLIE.
> > +        */
> > +       unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
> > +
> > +       if (d->hwirq < ANDES_SLI_CAUSE_BASE)
> > +               csr_clear(CSR_IE, mask);
> > +       else
> > +               csr_clear(ANDES_CSR_SLIE, mask);
> > +}
> > +
> > +static void andes_intc_irq_unmask(struct irq_data *d)
> > +{
> > +       unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
> > +
> > +       if (d->hwirq < ANDES_SLI_CAUSE_BASE)
> > +               csr_set(CSR_IE, mask);
> > +       else
> > +               csr_set(ANDES_CSR_SLIE, mask);
> 
> Clearly, Andes does not have any CSR for:
> XLEN <= local interrupt <ANDES_SLI_CAUSE_BASE
> and
> ANDES_SLI_CAUSE_BASE + XLEN <= local interrupt

Ah, what am I doing here.
sorry for that silly patch.

Regards,
Peter Lin

> Regards,
> Anup

Re: [PATCH v5 03/16] irqchip/riscv-intc: Introduce Andes hart-level interrupt controller

[Anup Patel]

On Wed, Dec 13, 2023 at 9:15 PM Yu-Chien Peter Lin
<peterlin@andestech.com> wrote:
>
> On Wed, Dec 13, 2023 at 08:15:28PM +0530, Anup Patel wrote:
> > On Wed, Dec 13, 2023 at 12:35 PM Yu Chien Peter Lin
> > <peterlin@andestech.com> wrote:
> > >
> > > Add support for the Andes hart-level interrupt controller. This
> > > controller provides interrupt mask/unmask functions to access the
> > > custom register (SLIE) where the non-standard S-mode local interrupt
> > > enable bits are located.
> > >
> > > To share the riscv_intc_domain_map() with the generic RISC-V INTC and
> > > ACPI, add a chip parameter to riscv_intc_init_common(), so it can be
> > > passed to the irq_domain_set_info() as private data.
> > >
> > > Andes hart-level interrupt controller requires the "andestech,cpu-intc"
> > > compatible string to be present in interrupt-controller of cpu node.
> > > e.g.,
> > >
> > >   cpu0: cpu@0 {
> > >       compatible = "andestech,ax45mp", "riscv";
> > >       ...
> > >       cpu0-intc: interrupt-controller {
> > >           #interrupt-cells = <0x01>;
> > >           compatible = "andestech,cpu-intc", "riscv,cpu-intc";
> > >           interrupt-controller;
> > >       };
> > >   };
> > >
> > > Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> > > Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
> > > Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
> > > ---
> > > Changes v1 -> v2:
> > >   - New patch
> > > Changes v2 -> v3:
> > >   - Return -ENXIO if no valid compatible INTC found
> > >   - Allow falling back to generic RISC-V INTC
> > > Changes v3 -> v4: (Suggested by Thomas [1])
> > >   - Add comment to andes irq chip function
> > >   - Refine code flow to share with generic RISC-V INTC and ACPI
> > >   - Move Andes specific definitions to include/linux/soc/andes/irq.h
> > > Changes v4 -> v5: (Suggested by Thomas)
> > >   - Fix commit message
> > >   - Subtract ANDES_SLI_CAUSE_BASE from d->hwirq to calculate the value of mask
> > >   - Do not set chip_data to the chip itself with irq_domain_set_info()
> > >   - Follow reverse fir tree order variable declarations
> > >
> > > [1] https://patchwork.kernel.org/project/linux-riscv/patch/20231019135723.3657156-1-peterlin@andestech.com/
> > > ---
> > >  drivers/irqchip/irq-riscv-intc.c | 53 ++++++++++++++++++++++++++++----
> > >  include/linux/soc/andes/irq.h    | 17 ++++++++++
> > >  2 files changed, 64 insertions(+), 6 deletions(-)
> > >  create mode 100644 include/linux/soc/andes/irq.h
> > >
> > > diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> > > index 2fdd40f2a791..0b6bf3fb1dba 100644
> > > --- a/drivers/irqchip/irq-riscv-intc.c
> > > +++ b/drivers/irqchip/irq-riscv-intc.c
> > > @@ -17,6 +17,7 @@
> > >  #include <linux/module.h>
> > >  #include <linux/of.h>
> > >  #include <linux/smp.h>
> > > +#include <linux/soc/andes/irq.h>
> > >
> > >  static struct irq_domain *intc_domain;
> > >
> > > @@ -46,6 +47,31 @@ static void riscv_intc_irq_unmask(struct irq_data *d)
> > >         csr_set(CSR_IE, BIT(d->hwirq));
> > >  }
> > >
> > > +static void andes_intc_irq_mask(struct irq_data *d)
> > > +{
> > > +       /*
> > > +        * Andes specific S-mode local interrupt causes (hwirq)
> > > +        * are defined as (256 + n) and controlled by n-th bit
> > > +        * of SLIE.
> > > +        */
> > > +       unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
> > > +
> > > +       if (d->hwirq < ANDES_SLI_CAUSE_BASE)
> > > +               csr_clear(CSR_IE, mask);
> > > +       else
> > > +               csr_clear(ANDES_CSR_SLIE, mask);
> > > +}
> > > +
> > > +static void andes_intc_irq_unmask(struct irq_data *d)
> > > +{
> > > +       unsigned int mask = BIT(d->hwirq - ANDES_SLI_CAUSE_BASE);
> > > +
> > > +       if (d->hwirq < ANDES_SLI_CAUSE_BASE)
> > > +               csr_set(CSR_IE, mask);
> > > +       else
> > > +               csr_set(ANDES_CSR_SLIE, mask);
> >
> > Clearly, Andes does not have any CSR for:
> > XLEN <= local interrupt <ANDES_SLI_CAUSE_BASE
> > and
> > ANDES_SLI_CAUSE_BASE + XLEN <= local interrupt
>
> Ah, what am I doing here.
> sorry for that silly patch.

This patch is okay only if we can guarantee that
hwirq is within accepted range.

For example, riscv_intc_domain_alloc() can deny
invalid local interrupts.

Regards,
Anup

Re: [PATCH v5 02/16] irqchip/riscv-intc: Allow large non-standard interrupt number

[Yu-Chien Peter Lin]

Hi Anup,

On Wed, Dec 13, 2023 at 08:49:23PM +0530, Anup Patel wrote:
> On Wed, Dec 13, 2023 at 7:58 PM Anup Patel <apatel@ventanamicro.com> wrote:
> >
> > On Wed, Dec 13, 2023 at 12:34 PM Yu Chien Peter Lin
> > <peterlin@andestech.com> wrote:
> > >
> > > Currently, the implementation of the RISC-V INTC driver uses the
> > > interrupt cause as hardware interrupt number and has a limitation of
> > > supporting a maximum of 64 interrupts. However, according to the
> > > privileged spec, interrupt causes >= 16 are defined for platform use.
> >
> > I disagree with this patch.
> >
> > Even though RISC-V priv sepc allows interrupt causes >= 16, we
> > still need CSRs to manage arbitrary local interrupts
> >
> > Currently, we have following standard CSRs:
> > 1) [m|s]ie and [m|s]ip which are XLEN wide
> > 2) With AIA, we have [m|s]ieh and [m|s]iph for RV32
> >
> > Clearly, we can only have a XLEN number of standard local
> > interrupts without AIA and 64 local interrupts with AIA.
> >
> > Now for implementations with custom CSRs (such as Andes),
> > we still can't assume infinite local interrupts because HW will
> > have a finite number of custom CSRs.
> >
> > >
> > > This limitation prevents to fully utilize the available local interrupt
> > > sources. Additionally, the interrupt number used on RISC-V are sparse,
> > > with only interrupt numbers 1, 5 and 9 (plus Sscofpmf or T-Head's PMU
> > > interrupt) being currently used for supervisor mode.
> > >
> > > Switch to using irq_domain_create_tree() to create the radix tree
> > > map, so a larger number of hardware interrupts can be handled.
> > >
> > > Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> > > Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>
> > > Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
> > > ---
> > > Changes v1 -> v2:
> > >   - Fixed irq mapping failure checking (suggested by Clément and Anup)
> > > Changes v2 -> v3:
> > >   - No change
> > > Changes v3 -> v4: (Suggested by Thomas [1])
> > >   - Use pr_warn_ratelimited instead
> > >   - Fix coding style and commit message
> > > Changes v4 -> v5: (Suggested by Thomas)
> > >   - Fix commit message
> > >
> > > [1] https://patchwork.kernel.org/project/linux-riscv/patch/20231023004100.2663486-3-peterlin@andestech.com/#25573085
> > > ---
> > >  drivers/irqchip/irq-riscv-intc.c | 12 ++++--------
> > >  1 file changed, 4 insertions(+), 8 deletions(-)
> > >
> > > diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> > > index e8d01b14ccdd..2fdd40f2a791 100644
> > > --- a/drivers/irqchip/irq-riscv-intc.c
> > > +++ b/drivers/irqchip/irq-riscv-intc.c
> > > @@ -24,10 +24,9 @@ static asmlinkage void riscv_intc_irq(struct pt_regs *regs)
> > >  {
> > >         unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;
> > >
> > > -       if (unlikely(cause >= BITS_PER_LONG))
> > > -               panic("unexpected interrupt cause");
> > > -
> > > -       generic_handle_domain_irq(intc_domain, cause);
> > > +       if (generic_handle_domain_irq(intc_domain, cause))
> > > +               pr_warn_ratelimited("Failed to handle interrupt (cause: %ld)\n",
> > > +                                   cause);
> > >  }
> > >
> > >  /*
> > > @@ -117,8 +116,7 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
> > >  {
> > >         int rc;
> > >
> > > -       intc_domain = irq_domain_create_linear(fn, BITS_PER_LONG,
> > > -                                              &riscv_intc_domain_ops, NULL);
> > > +       intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, NULL);
> >
> > I disagree with this change based on the reasoning above.
> >
> > Instead of this, we should determine the number of local interrupts
> > based on the type of RISC-V intc:
> > 1) For standard INTC without AIA, we have XLEN (or BITS_PER_LONG)
> >     local interrupts
> > 2) For standart INTC with AIA, we have 64 local interrupts
> > 3) For custom INTC (such as Andes), the number of local interrupt
> >     should be custom (Andes specific) which can be determined based
> >     on compatible string.
> >
> > Also, creating a linear domain with a fixed number of local interrupts
> > ensures that drivers can't map a local interrupt beyond the availability
> > of CSRs to manage it.
> 
> Thinking about this more. We do have a problem because Andes local
> interrupts are really sparse which is not the case for standard local
> interrupts
> 
> I have an alternate suggestion which goes as follows ...
> 
> We use irq_domain_create_tree() in-place of irq_domain_create_linear()
> and enforce checks on hwirq in riscv_intc_domain_alloc() to ensure that
> we only allow hwirq for which we have corresponding standard or custom
> CSR.
> 
> To achieve this, riscv_intc_init_common() will have to save the following
> as static global variables:
> 1) riscv_intc_nr_irqs: Number of standard local interrupts
> 2) riscv_intc_custom_base and riscv_intc_custom_nr_irqs: Base and
>     number of custom local interrupts.
> 
> Using the above static global variables, the riscv_intc_domain_alloc()
> can return error if one of the following conditions are met:
> 1) riscv_intc_nr_irqs<= hwirq && hwirq < riscv_intc_custom_base
> 2) (riscv_intc_custom_base + riscv_intc_custom_nr_irqs) <= hwirq
> 
> For standard INTC, we can set the static global variable as follows:
> riscv_intc_nr_irqs = XLEN or BITS_PER_LONG
> riscv_intc_custom_base = riscv_intc_nr_irqs
> riscv_intc_custom_nr_irqs = 0
> 
> For Andes INTC, we can set the static global variables as follows:
> riscv_intc_nr_irqs = XLEN or BITS_PER_LONG
> riscv_intc_custom_base = 256
> riscv_intc_custom_nr_irqs = XLEN or BITS_PER_LONG
> 
> Regards,
> Anup

Thank you for offering your help on this.
I will rework the patch accordingly.

Best regards,
Peter Lin

> >
> > >         if (!intc_domain) {
> > >                 pr_err("unable to add IRQ domain\n");
> > >                 return -ENXIO;
> > > @@ -132,8 +130,6 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
> > >
> > >         riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
> > >
> > > -       pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
> > > -
> >
> > Same as above, we should definitely advertise the type of INTC and
> > number of local interrupts mapped.
> >
> > Regards,
> > Anup
> >
> > >         return 0;
> > >  }
> > >
> > > --
> > > 2.34.1
> > >
> > >
> > > _______________________________________________
> > > linux-riscv mailing list
> > > linux-riscv@lists.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-riscv