| Message ID | 20230913163823.7880-29-james.morse@arm.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | ACPI/arm64: add support for virtual cpuhotplug | expand |
On Wed, Sep 13, 2023 at 04:38:16PM +0000, James Morse wrote: > +static inline bool acpi_gicc_is_usable(struct acpi_madt_generic_interrupt *gicc) > +{ > + return (gicc->flags & ACPI_MADT_ENABLED); These parens are not needed.
On Wed, 13 Sep 2023 16:38:16 +0000 James Morse <james.morse@arm.com> wrote: > ACPI, irqchip and the architecture code all inspect the MADT > enabled bit for a GICC entry in the MADT. > > The addition of an 'online capable' bit means all these sites need > updating. > > Move the current checks behind a helper to make future updates easier. > > Signed-off-by: James Morse <james.morse@arm.com> Looks good to me and seems fine to add as part of a precursor mini series to the main one. (fix Russell's observation of course!) Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > --- > arch/arm64/kernel/smp.c | 2 +- > drivers/acpi/processor_core.c | 2 +- > drivers/irqchip/irq-gic-v3.c | 10 ++++------ > include/linux/acpi.h | 5 +++++ > 4 files changed, 11 insertions(+), 8 deletions(-) > > diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c > index 960b98b43506..8c8f55721786 100644 > --- a/arch/arm64/kernel/smp.c > +++ b/arch/arm64/kernel/smp.c > @@ -520,7 +520,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor) > { > u64 hwid = processor->arm_mpidr; > > - if (!(processor->flags & ACPI_MADT_ENABLED)) { > + if (!acpi_gicc_is_usable(processor)) { > pr_debug("skipping disabled CPU entry with 0x%llx MPIDR\n", hwid); > return; > } > diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c > index 7dd6dbaa98c3..b203cfe28550 100644 > --- a/drivers/acpi/processor_core.c > +++ b/drivers/acpi/processor_core.c > @@ -90,7 +90,7 @@ static int map_gicc_mpidr(struct acpi_subtable_header *entry, > struct acpi_madt_generic_interrupt *gicc = > container_of(entry, struct acpi_madt_generic_interrupt, header); > > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return -ENODEV; > > /* device_declaration means Device object in DSDT, in the > diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c > index eedfa8e9f077..72d3cdebdad1 100644 > --- a/drivers/irqchip/irq-gic-v3.c > +++ b/drivers/irqchip/irq-gic-v3.c > @@ -2367,8 +2367,7 @@ gic_acpi_parse_madt_gicc(union acpi_subtable_headers *header, > u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2; > void __iomem *redist_base; > > - /* GICC entry which has !ACPI_MADT_ENABLED is not unusable so skip */ > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return 0; > > redist_base = ioremap(gicc->gicr_base_address, size); > @@ -2418,7 +2417,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header, > * If GICC is enabled and has valid gicr base address, then it means > * GICR base is presented via GICC > */ > - if ((gicc->flags & ACPI_MADT_ENABLED) && gicc->gicr_base_address) { > + if (acpi_gicc_is_usable(gicc) && gicc->gicr_base_address) { > acpi_data.enabled_rdists++; > return 0; > } > @@ -2427,7 +2426,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header, > * It's perfectly valid firmware can pass disabled GICC entry, driver > * should not treat as errors, skip the entry instead of probe fail. > */ > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return 0; > > return -ENODEV; > @@ -2486,8 +2485,7 @@ static int __init gic_acpi_parse_virt_madt_gicc(union acpi_subtable_headers *hea > int maint_irq_mode; > static int first_madt = true; > > - /* Skip unusable CPUs */ > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return 0; > > maint_irq_mode = (gicc->flags & ACPI_MADT_VGIC_IRQ_MODE) ? > diff --git a/include/linux/acpi.h b/include/linux/acpi.h > index b7ab85857bb7..e3265a9eafae 100644 > --- a/include/linux/acpi.h > +++ b/include/linux/acpi.h > @@ -256,6 +256,11 @@ acpi_table_parse_cedt(enum acpi_cedt_type id, > int acpi_parse_mcfg (struct acpi_table_header *header); > void acpi_table_print_madt_entry (struct acpi_subtable_header *madt); > > +static inline bool acpi_gicc_is_usable(struct acpi_madt_generic_interrupt *gicc) > +{ > + return (gicc->flags & ACPI_MADT_ENABLED); > +} > + > /* the following numa functions are architecture-dependent */ > void acpi_numa_slit_init (struct acpi_table_slit *slit); >
On 9/14/23 02:38, James Morse wrote: > ACPI, irqchip and the architecture code all inspect the MADT > enabled bit for a GICC entry in the MADT. > > The addition of an 'online capable' bit means all these sites need > updating. > > Move the current checks behind a helper to make future updates easier. > > Signed-off-by: James Morse <james.morse@arm.com> > --- > arch/arm64/kernel/smp.c | 2 +- > drivers/acpi/processor_core.c | 2 +- > drivers/irqchip/irq-gic-v3.c | 10 ++++------ > include/linux/acpi.h | 5 +++++ > 4 files changed, 11 insertions(+), 8 deletions(-) > With Jonathan and Russell's comments addressed: Reviewed-by: Gavin Shan <gshan@redhat.com> > diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c > index 960b98b43506..8c8f55721786 100644 > --- a/arch/arm64/kernel/smp.c > +++ b/arch/arm64/kernel/smp.c > @@ -520,7 +520,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor) > { > u64 hwid = processor->arm_mpidr; > > - if (!(processor->flags & ACPI_MADT_ENABLED)) { > + if (!acpi_gicc_is_usable(processor)) { > pr_debug("skipping disabled CPU entry with 0x%llx MPIDR\n", hwid); > return; > } > diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c > index 7dd6dbaa98c3..b203cfe28550 100644 > --- a/drivers/acpi/processor_core.c > +++ b/drivers/acpi/processor_core.c > @@ -90,7 +90,7 @@ static int map_gicc_mpidr(struct acpi_subtable_header *entry, > struct acpi_madt_generic_interrupt *gicc = > container_of(entry, struct acpi_madt_generic_interrupt, header); > > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return -ENODEV; > > /* device_declaration means Device object in DSDT, in the > diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c > index eedfa8e9f077..72d3cdebdad1 100644 > --- a/drivers/irqchip/irq-gic-v3.c > +++ b/drivers/irqchip/irq-gic-v3.c > @@ -2367,8 +2367,7 @@ gic_acpi_parse_madt_gicc(union acpi_subtable_headers *header, > u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2; > void __iomem *redist_base; > > - /* GICC entry which has !ACPI_MADT_ENABLED is not unusable so skip */ > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return 0; > > redist_base = ioremap(gicc->gicr_base_address, size); > @@ -2418,7 +2417,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header, > * If GICC is enabled and has valid gicr base address, then it means > * GICR base is presented via GICC > */ > - if ((gicc->flags & ACPI_MADT_ENABLED) && gicc->gicr_base_address) { > + if (acpi_gicc_is_usable(gicc) && gicc->gicr_base_address) { > acpi_data.enabled_rdists++; > return 0; > } > @@ -2427,7 +2426,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header, > * It's perfectly valid firmware can pass disabled GICC entry, driver > * should not treat as errors, skip the entry instead of probe fail. > */ > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return 0; > > return -ENODEV; > @@ -2486,8 +2485,7 @@ static int __init gic_acpi_parse_virt_madt_gicc(union acpi_subtable_headers *hea > int maint_irq_mode; > static int first_madt = true; > > - /* Skip unusable CPUs */ > - if (!(gicc->flags & ACPI_MADT_ENABLED)) > + if (!acpi_gicc_is_usable(gicc)) > return 0; > > maint_irq_mode = (gicc->flags & ACPI_MADT_VGIC_IRQ_MODE) ? > diff --git a/include/linux/acpi.h b/include/linux/acpi.h > index b7ab85857bb7..e3265a9eafae 100644 > --- a/include/linux/acpi.h > +++ b/include/linux/acpi.h > @@ -256,6 +256,11 @@ acpi_table_parse_cedt(enum acpi_cedt_type id, > int acpi_parse_mcfg (struct acpi_table_header *header); > void acpi_table_print_madt_entry (struct acpi_subtable_header *madt); > > +static inline bool acpi_gicc_is_usable(struct acpi_madt_generic_interrupt *gicc) > +{ > + return (gicc->flags & ACPI_MADT_ENABLED); > +} > + > /* the following numa functions are architecture-dependent */ > void acpi_numa_slit_init (struct acpi_table_slit *slit); > Thanks, Gavin
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 960b98b43506..8c8f55721786 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -520,7 +520,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor) { u64 hwid = processor->arm_mpidr; - if (!(processor->flags & ACPI_MADT_ENABLED)) { + if (!acpi_gicc_is_usable(processor)) { pr_debug("skipping disabled CPU entry with 0x%llx MPIDR\n", hwid); return; } diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index 7dd6dbaa98c3..b203cfe28550 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -90,7 +90,7 @@ static int map_gicc_mpidr(struct acpi_subtable_header *entry, struct acpi_madt_generic_interrupt *gicc = container_of(entry, struct acpi_madt_generic_interrupt, header); - if (!(gicc->flags & ACPI_MADT_ENABLED)) + if (!acpi_gicc_is_usable(gicc)) return -ENODEV; /* device_declaration means Device object in DSDT, in the diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index eedfa8e9f077..72d3cdebdad1 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -2367,8 +2367,7 @@ gic_acpi_parse_madt_gicc(union acpi_subtable_headers *header, u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2; void __iomem *redist_base; - /* GICC entry which has !ACPI_MADT_ENABLED is not unusable so skip */ - if (!(gicc->flags & ACPI_MADT_ENABLED)) + if (!acpi_gicc_is_usable(gicc)) return 0; redist_base = ioremap(gicc->gicr_base_address, size); @@ -2418,7 +2417,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header, * If GICC is enabled and has valid gicr base address, then it means * GICR base is presented via GICC */ - if ((gicc->flags & ACPI_MADT_ENABLED) && gicc->gicr_base_address) { + if (acpi_gicc_is_usable(gicc) && gicc->gicr_base_address) { acpi_data.enabled_rdists++; return 0; } @@ -2427,7 +2426,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header, * It's perfectly valid firmware can pass disabled GICC entry, driver * should not treat as errors, skip the entry instead of probe fail. */ - if (!(gicc->flags & ACPI_MADT_ENABLED)) + if (!acpi_gicc_is_usable(gicc)) return 0; return -ENODEV; @@ -2486,8 +2485,7 @@ static int __init gic_acpi_parse_virt_madt_gicc(union acpi_subtable_headers *hea int maint_irq_mode; static int first_madt = true; - /* Skip unusable CPUs */ - if (!(gicc->flags & ACPI_MADT_ENABLED)) + if (!acpi_gicc_is_usable(gicc)) return 0; maint_irq_mode = (gicc->flags & ACPI_MADT_VGIC_IRQ_MODE) ? diff --git a/include/linux/acpi.h b/include/linux/acpi.h index b7ab85857bb7..e3265a9eafae 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -256,6 +256,11 @@ acpi_table_parse_cedt(enum acpi_cedt_type id, int acpi_parse_mcfg (struct acpi_table_header *header); void acpi_table_print_madt_entry (struct acpi_subtable_header *madt); +static inline bool acpi_gicc_is_usable(struct acpi_madt_generic_interrupt *gicc) +{ + return (gicc->flags & ACPI_MADT_ENABLED); +} + /* the following numa functions are architecture-dependent */ void acpi_numa_slit_init (struct acpi_table_slit *slit);
ACPI, irqchip and the architecture code all inspect the MADT enabled bit for a GICC entry in the MADT. The addition of an 'online capable' bit means all these sites need updating. Move the current checks behind a helper to make future updates easier. Signed-off-by: James Morse <james.morse@arm.com> --- arch/arm64/kernel/smp.c | 2 +- drivers/acpi/processor_core.c | 2 +- drivers/irqchip/irq-gic-v3.c | 10 ++++------ include/linux/acpi.h | 5 +++++ 4 files changed, 11 insertions(+), 8 deletions(-)