6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Anshuman Khandual <anshuman.khandual@arm.com>
[ Upstream commit 1aa3d0274a4aac338ee45a3dfc3b17c944bcc2bc ]
ACPI TRBE does not have a HID for identification which could create and add
a platform device into the platform bus. Also without a platform device, it
cannot be probed and bound to a platform driver.
This creates a dummy platform device for TRBE after ascertaining that ACPI
provides required interrupts uniformly across all cpus on the system. This
device gets created inside drivers/perf/arm_pmu_acpi.c to accommodate TRBE
being built as a module.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20230817055405.249630-3-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Stable-dep-of: 4785aa802853 ("cpuidle, ACPI: Evaluate LPI arch_flags for broadcast timer")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/include/asm/acpi.h | 3 +++
drivers/perf/arm_pmu_acpi.c | 35 +++++++++++++++++++++++++++++++++++
include/linux/perf/arm_pmu.h | 1 +
3 files changed, 39 insertions(+)
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index bd68e1b7f29f3..4d537d56eb847 100644
--- a/arch/arm64/include/asm/acpi.h
+++ b/arch/arm64/include/asm/acpi.h
@@ -42,6 +42,9 @@
#define ACPI_MADT_GICC_SPE (offsetof(struct acpi_madt_generic_interrupt, \
spe_interrupt) + sizeof(u16))
+#define ACPI_MADT_GICC_TRBE (offsetof(struct acpi_madt_generic_interrupt, \
+ trbe_interrupt) + sizeof(u16))
+
/* Basic configuration for ACPI */
#ifdef CONFIG_ACPI
pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c
index 90815ad762ebc..8baeeb369118e 100644
--- a/drivers/perf/arm_pmu_acpi.c
+++ b/drivers/perf/arm_pmu_acpi.c
@@ -139,6 +139,40 @@ static inline void arm_spe_acpi_register_device(void)
}
#endif /* CONFIG_ARM_SPE_PMU */
+#if IS_ENABLED(CONFIG_CORESIGHT_TRBE)
+static struct resource trbe_resources[] = {
+ {
+ /* irq */
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static struct platform_device trbe_dev = {
+ .name = ARMV8_TRBE_PDEV_NAME,
+ .id = -1,
+ .resource = trbe_resources,
+ .num_resources = ARRAY_SIZE(trbe_resources)
+};
+
+static u16 arm_trbe_parse_gsi(struct acpi_madt_generic_interrupt *gicc)
+{
+ return gicc->trbe_interrupt;
+}
+
+static void arm_trbe_acpi_register_device(void)
+{
+ int ret = arm_acpi_register_pmu_device(&trbe_dev, ACPI_MADT_GICC_TRBE,
+ arm_trbe_parse_gsi);
+ if (ret)
+ pr_warn("ACPI: TRBE: Unable to register device\n");
+}
+#else
+static inline void arm_trbe_acpi_register_device(void)
+{
+
+}
+#endif /* CONFIG_CORESIGHT_TRBE */
+
static int arm_pmu_acpi_parse_irqs(void)
{
int irq, cpu, irq_cpu, err;
@@ -374,6 +408,7 @@ static int arm_pmu_acpi_init(void)
return 0;
arm_spe_acpi_register_device();
+ arm_trbe_acpi_register_device();
return 0;
}
diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index a0801f68762bf..143fbc10ecfe0 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h
@@ -187,5 +187,6 @@ void armpmu_free_irq(int irq, int cpu);
#endif /* CONFIG_ARM_PMU */
#define ARMV8_SPE_PDEV_NAME "arm,spe-v1"
+#define ARMV8_TRBE_PDEV_NAME "arm,trbe"
#endif /* __ARM_PMU_H__ */
--
2.40.1On 16.10.23 10:39, Greg Kroah-Hartman wrote:
> 6.5-stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> From: Anshuman Khandual <anshuman.khandual@arm.com>
>
> [ Upstream commit 1aa3d0274a4aac338ee45a3dfc3b17c944bcc2bc ]
>
> ACPI TRBE does not have a HID for identification which could create and add
> a platform device into the platform bus. Also without a platform device, it
> cannot be probed and bound to a platform driver.
>
> This creates a dummy platform device for TRBE after ascertaining that ACPI
> provides required interrupts uniformly across all cpus on the system. This
> device gets created inside drivers/perf/arm_pmu_acpi.c to accommodate TRBE
> being built as a module.
>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> Link: https://lore.kernel.org/r/20230817055405.249630-3-anshuman.khandual@arm.com
> Signed-off-by: Will Deacon <will@kernel.org>
> Stable-dep-of: 4785aa802853 ("cpuidle, ACPI: Evaluate LPI arch_flags for broadcast timer")
> Signed-off-by: Sasha Levin <sashal@kernel.org>
Got a compiler error when using Fedora's stable kernel config and
compiling 6.5.8-rc1 for ARM64; not totally sure, but from the error msg
I suspect it's caused by the change quoted above.
"""
+ /usr/bin/make -s 'HOSTCFLAGS=-O2 -fexceptions -g
-grecord-gcc-switches -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1
-mbranch-protection=standard -fasynchronous-unwind-tables
-fstack-clash-protection' 'HOSTLDFLAGS=-Wl,-z,relro -Wl,--as-needed
-Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -Wl,--build-id=sha1
-specs=/usr/lib/rpm/redhat/redhat-package-notes' ARCH=arm64 'KCFLAGS= '
WITH_GCOV=0 -j4 vmlinuz.efi
drivers/perf/arm_pmu_acpi.c: In function 'arm_trbe_acpi_register_device':
drivers/perf/arm_pmu_acpi.c:164:19: error: implicit declaration of
function 'arm_acpi_register_pmu_device'; did you mean
'arm_spe_acpi_register_device'? [-Werror=implicit-function-declaration]
164 | int ret = arm_acpi_register_pmu_device(&trbe_dev,
ACPI_MADT_GICC_TRBE,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
| arm_spe_acpi_register_device
cc1: some warnings being treated as errors
make[4]: *** [scripts/Makefile.build:243: drivers/perf/arm_pmu_acpi.o]
Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [scripts/Makefile.build:480: drivers/perf] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [scripts/Makefile.build:480: drivers] Error 2
make[1]: ***
[/builddir/build/BUILD/kernel-6.5.8-rc1/linux-6.5.8-0.rc1.150.vanilla.fc37.aarch64/Makefile:2036:
.] Error 2
make: *** [Makefile:236: __sub-make] Error 2
"""
Full build log:
https://copr-be.cloud.fedoraproject.org/results/@kernel-vanilla/stable-rc/fedora-37-aarch64/06529454-stablerc-stablerc-releases/builder-live.log.gz
Ciao, Thorsten
> ---
> arch/arm64/include/asm/acpi.h | 3 +++
> drivers/perf/arm_pmu_acpi.c | 35 +++++++++++++++++++++++++++++++++++
> include/linux/perf/arm_pmu.h | 1 +
> 3 files changed, 39 insertions(+)
>
> diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
> index bd68e1b7f29f3..4d537d56eb847 100644
> --- a/arch/arm64/include/asm/acpi.h
> +++ b/arch/arm64/include/asm/acpi.h
> @@ -42,6 +42,9 @@
> #define ACPI_MADT_GICC_SPE (offsetof(struct acpi_madt_generic_interrupt, \
> spe_interrupt) + sizeof(u16))
>
> +#define ACPI_MADT_GICC_TRBE (offsetof(struct acpi_madt_generic_interrupt, \
> + trbe_interrupt) + sizeof(u16))
> +
> /* Basic configuration for ACPI */
> #ifdef CONFIG_ACPI
> pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
> diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c
> index 90815ad762ebc..8baeeb369118e 100644
> --- a/drivers/perf/arm_pmu_acpi.c
> +++ b/drivers/perf/arm_pmu_acpi.c
> @@ -139,6 +139,40 @@ static inline void arm_spe_acpi_register_device(void)
> }
> #endif /* CONFIG_ARM_SPE_PMU */
>
> +#if IS_ENABLED(CONFIG_CORESIGHT_TRBE)
> +static struct resource trbe_resources[] = {
> + {
> + /* irq */
> + .flags = IORESOURCE_IRQ,
> + }
> +};
> +
> +static struct platform_device trbe_dev = {
> + .name = ARMV8_TRBE_PDEV_NAME,
> + .id = -1,
> + .resource = trbe_resources,
> + .num_resources = ARRAY_SIZE(trbe_resources)
> +};
> +
> +static u16 arm_trbe_parse_gsi(struct acpi_madt_generic_interrupt *gicc)
> +{
> + return gicc->trbe_interrupt;
> +}
> +
> +static void arm_trbe_acpi_register_device(void)
> +{
> + int ret = arm_acpi_register_pmu_device(&trbe_dev, ACPI_MADT_GICC_TRBE,
> + arm_trbe_parse_gsi);
> + if (ret)
> + pr_warn("ACPI: TRBE: Unable to register device\n");
> +}
> +#else
> +static inline void arm_trbe_acpi_register_device(void)
> +{
> +
> +}
> +#endif /* CONFIG_CORESIGHT_TRBE */
> +
> static int arm_pmu_acpi_parse_irqs(void)
> {
> int irq, cpu, irq_cpu, err;
> @@ -374,6 +408,7 @@ static int arm_pmu_acpi_init(void)
> return 0;
>
> arm_spe_acpi_register_device();
> + arm_trbe_acpi_register_device();
>
> return 0;
> }
> diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
> index a0801f68762bf..143fbc10ecfe0 100644
> --- a/include/linux/perf/arm_pmu.h
> +++ b/include/linux/perf/arm_pmu.h
> @@ -187,5 +187,6 @@ void armpmu_free_irq(int irq, int cpu);
> #endif /* CONFIG_ARM_PMU */
>
> #define ARMV8_SPE_PDEV_NAME "arm,spe-v1"
> +#define ARMV8_TRBE_PDEV_NAME "arm,trbe"
>
> #endif /* __ARM_PMU_H__ */
On Mon, Oct 16, 2023 at 06:05:53PM +0200, Thorsten Leemhuis wrote:
> On 16.10.23 10:39, Greg Kroah-Hartman wrote:
> > 6.5-stable review patch. If anyone has any objections, please let me know.
> >
> > ------------------
> >
> > From: Anshuman Khandual <anshuman.khandual@arm.com>
> >
> > [ Upstream commit 1aa3d0274a4aac338ee45a3dfc3b17c944bcc2bc ]
> >
> > ACPI TRBE does not have a HID for identification which could create and add
> > a platform device into the platform bus. Also without a platform device, it
> > cannot be probed and bound to a platform driver.
> >
> > This creates a dummy platform device for TRBE after ascertaining that ACPI
> > provides required interrupts uniformly across all cpus on the system. This
> > device gets created inside drivers/perf/arm_pmu_acpi.c to accommodate TRBE
> > being built as a module.
> >
> > Cc: Catalin Marinas <catalin.marinas@arm.com>
> > Cc: Will Deacon <will@kernel.org>
> > Cc: Mark Rutland <mark.rutland@arm.com>
> > Cc: linux-arm-kernel@lists.infradead.org
> > Cc: linux-kernel@vger.kernel.org
> > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> > Link: https://lore.kernel.org/r/20230817055405.249630-3-anshuman.khandual@arm.com
> > Signed-off-by: Will Deacon <will@kernel.org>
> > Stable-dep-of: 4785aa802853 ("cpuidle, ACPI: Evaluate LPI arch_flags for broadcast timer")
> > Signed-off-by: Sasha Levin <sashal@kernel.org>
>
> Got a compiler error when using Fedora's stable kernel config and
> compiling 6.5.8-rc1 for ARM64; not totally sure, but from the error msg
> I suspect it's caused by the change quoted above.
>
> """
> + /usr/bin/make -s 'HOSTCFLAGS=-O2 -fexceptions -g
> -grecord-gcc-switches -pipe -Wall -Werror=format-security
> -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS
> -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong
> -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1
> -mbranch-protection=standard -fasynchronous-unwind-tables
> -fstack-clash-protection' 'HOSTLDFLAGS=-Wl,-z,relro -Wl,--as-needed
> -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
> -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -Wl,--build-id=sha1
> -specs=/usr/lib/rpm/redhat/redhat-package-notes' ARCH=arm64 'KCFLAGS= '
> WITH_GCOV=0 -j4 vmlinuz.efi
> drivers/perf/arm_pmu_acpi.c: In function 'arm_trbe_acpi_register_device':
> drivers/perf/arm_pmu_acpi.c:164:19: error: implicit declaration of
> function 'arm_acpi_register_pmu_device'; did you mean
> 'arm_spe_acpi_register_device'? [-Werror=implicit-function-declaration]
> 164 | int ret = arm_acpi_register_pmu_device(&trbe_dev,
> ACPI_MADT_GICC_TRBE,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> | arm_spe_acpi_register_device
> cc1: some warnings being treated as errors
> make[4]: *** [scripts/Makefile.build:243: drivers/perf/arm_pmu_acpi.o]
> Error 1
> make[4]: *** Waiting for unfinished jobs....
> make[3]: *** [scripts/Makefile.build:480: drivers/perf] Error 2
> make[3]: *** Waiting for unfinished jobs....
> make[2]: *** [scripts/Makefile.build:480: drivers] Error 2
> make[1]: ***
> [/builddir/build/BUILD/kernel-6.5.8-rc1/linux-6.5.8-0.rc1.150.vanilla.fc37.aarch64/Makefile:2036:
> .] Error 2
> make: *** [Makefile:236: __sub-make] Error 2
> """
>
> Full build log:
> https://copr-be.cloud.fedoraproject.org/results/@kernel-vanilla/stable-rc/fedora-37-aarch64/06529454-stablerc-stablerc-releases/builder-live.log.gz
Thanks, I'll drop the offending commit and push out a -rc2.
greg k-h
On 16.10.23 18:52, Greg Kroah-Hartman wrote: > On Mon, Oct 16, 2023 at 06:05:53PM +0200, Thorsten Leemhuis wrote: >> On 16.10.23 10:39, Greg Kroah-Hartman wrote: >>> 6.5-stable review patch. If anyone has any objections, please let me know. >>> >>> ------------------ >>> >>> From: Anshuman Khandual <anshuman.khandual@arm.com> >>> >>> [ Upstream commit 1aa3d0274a4aac338ee45a3dfc3b17c944bcc2bc ] >>> >>> ACPI TRBE does not have a HID for identification which could create and add >>> a platform device into the platform bus. Also without a platform device, it >>> cannot be probed and bound to a platform driver. >> [...] >> Got a compiler error when using Fedora's stable kernel config and >> compiling 6.5.8-rc1 for ARM64; not totally sure, but from the error msg >> I suspect it's caused by the change quoted above. > [...] > Thanks, I'll drop the offending commit and push out a -rc2. Thx, that made things work! Ciao, Thorsten
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