| Message ID | 20221108110424.166896-2-pierre.gondois@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arch_topology: Build cacheinfo from primary CPU | expand |
On Tue, Nov 08, 2022 at 12:04:17PM +0100, Pierre Gondois wrote: > Riscv's implementation of init_of_cache_level() is following heh, "Riscv" always looks a bit odd! Code movement looks fine, nothing surface level is broken on RISC-V. Reviewed-by: Conor Dooley <conor.dooley@microchip.com> > the Devicetree Specification v0.3 regarding caches, cf.: > - s3.7.3 'Internal (L1) Cache Properties' > - s3.8 'Multi-level and Shared Cache Nodes' > > Allow reusing the implementation by moving it. > > Signed-off-by: Pierre Gondois <pierre.gondois@arm.com> > --- > arch/riscv/kernel/cacheinfo.c | 39 +------------------------------ > drivers/base/cacheinfo.c | 44 +++++++++++++++++++++++++++++++++++ > include/linux/cacheinfo.h | 1 + > 3 files changed, 46 insertions(+), 38 deletions(-) > > diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c > index 90deabfe63ea..440a3df5944c 100644 > --- a/arch/riscv/kernel/cacheinfo.c > +++ b/arch/riscv/kernel/cacheinfo.c > @@ -115,44 +115,7 @@ static void fill_cacheinfo(struct cacheinfo **this_leaf, > > int init_cache_level(unsigned int cpu) > { > - struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); > - struct device_node *np = of_cpu_device_node_get(cpu); > - struct device_node *prev = NULL; > - int levels = 0, leaves = 0, level; > - > - if (of_property_read_bool(np, "cache-size")) > - ++leaves; > - if (of_property_read_bool(np, "i-cache-size")) > - ++leaves; > - if (of_property_read_bool(np, "d-cache-size")) > - ++leaves; > - if (leaves > 0) > - levels = 1; > - > - prev = np; > - while ((np = of_find_next_cache_node(np))) { > - of_node_put(prev); > - prev = np; > - if (!of_device_is_compatible(np, "cache")) > - break; > - if (of_property_read_u32(np, "cache-level", &level)) > - break; > - if (level <= levels) > - break; > - if (of_property_read_bool(np, "cache-size")) > - ++leaves; > - if (of_property_read_bool(np, "i-cache-size")) > - ++leaves; > - if (of_property_read_bool(np, "d-cache-size")) > - ++leaves; > - levels = level; > - } > - > - of_node_put(np); > - this_cpu_ci->num_levels = levels; > - this_cpu_ci->num_leaves = leaves; > - > - return 0; > + return init_of_cache_level(cpu); > } > > int populate_cache_leaves(unsigned int cpu) > diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c > index 4b5cd08c5a65..a4308b48dd3e 100644 > --- a/drivers/base/cacheinfo.c > +++ b/drivers/base/cacheinfo.c > @@ -224,8 +224,52 @@ static int cache_setup_of_node(unsigned int cpu) > > return 0; > } > + > +int init_of_cache_level(unsigned int cpu) > +{ > + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); > + struct device_node *np = of_cpu_device_node_get(cpu); > + struct device_node *prev = NULL; > + int levels = 0, leaves = 0, level; > + > + if (of_property_read_bool(np, "cache-size")) > + ++leaves; > + if (of_property_read_bool(np, "i-cache-size")) > + ++leaves; > + if (of_property_read_bool(np, "d-cache-size")) > + ++leaves; > + if (leaves > 0) > + levels = 1; > + > + prev = np; > + while ((np = of_find_next_cache_node(np))) { > + of_node_put(prev); > + prev = np; > + if (!of_device_is_compatible(np, "cache")) > + break; > + if (of_property_read_u32(np, "cache-level", &level)) > + break; > + if (level <= levels) > + break; > + if (of_property_read_bool(np, "cache-size")) > + ++leaves; > + if (of_property_read_bool(np, "i-cache-size")) > + ++leaves; > + if (of_property_read_bool(np, "d-cache-size")) > + ++leaves; > + levels = level; > + } > + > + of_node_put(np); > + this_cpu_ci->num_levels = levels; > + this_cpu_ci->num_leaves = leaves; > + > + return 0; > +} > + > #else > static inline int cache_setup_of_node(unsigned int cpu) { return 0; } > +int init_of_cache_level(unsigned int cpu) { return 0; } > #endif > > int __weak cache_setup_acpi(unsigned int cpu) > diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h > index 00b7a6ae8617..ff0328f3fbb0 100644 > --- a/include/linux/cacheinfo.h > +++ b/include/linux/cacheinfo.h > @@ -80,6 +80,7 @@ struct cpu_cacheinfo { > > struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu); > int init_cache_level(unsigned int cpu); > +int init_of_cache_level(unsigned int cpu); > int populate_cache_leaves(unsigned int cpu); > int cache_setup_acpi(unsigned int cpu); > bool last_level_cache_is_valid(unsigned int cpu); > -- > 2.25.1 >
On Tue, Nov 08, 2022 at 02:07:41PM +0000, Conor Dooley wrote: > On Tue, Nov 08, 2022 at 12:04:17PM +0100, Pierre Gondois wrote: > > Riscv's implementation of init_of_cache_level() is following > > heh, "Riscv" always looks a bit odd! > Code movement looks fine, nothing surface level is broken on RISC-V. > Reviewed-by: Conor Dooley <conor.dooley@microchip.com> > Thanks for the review and testing. I was planning to ask Pierre to cc you next time but you seem to have covered that for me :).
On Tue, Nov 08, 2022 at 12:04:17PM +0100, Pierre Gondois wrote: > Riscv's implementation of init_of_cache_level() is following > the Devicetree Specification v0.3 regarding caches, cf.: > - s3.7.3 'Internal (L1) Cache Properties' > - s3.8 'Multi-level and Shared Cache Nodes' > > Allow reusing the implementation by moving it. > Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
On Tue, Nov 08, 2022 at 04:03:23PM +0000, Sudeep Holla wrote: > On Tue, Nov 08, 2022 at 12:04:17PM +0100, Pierre Gondois wrote: > > Riscv's implementation of init_of_cache_level() is following > > the Devicetree Specification v0.3 regarding caches, cf.: > > - s3.7.3 'Internal (L1) Cache Properties' > > - s3.8 'Multi-level and Shared Cache Nodes' > > > > Allow reusing the implementation by moving it. > > > > Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> > Forgot to mention earlier, I prefer to s/riscv/RISC-V/ s/implem/implementation/
On Tue, Nov 08, 2022 at 03:59:06PM +0000, Sudeep Holla wrote: > On Tue, Nov 08, 2022 at 02:07:41PM +0000, Conor Dooley wrote: > > On Tue, Nov 08, 2022 at 12:04:17PM +0100, Pierre Gondois wrote: > > > Riscv's implementation of init_of_cache_level() is following > > > > heh, "Riscv" always looks a bit odd! > > Code movement looks fine, nothing surface level is broken on RISC-V. > > Reviewed-by: Conor Dooley <conor.dooley@microchip.com> > > > Thanks for the review and testing. I was planning to ask Pierre to cc you > next time but you seem to have covered that for me :). Ye no worries. Feel free to add some sort of "R: Conor Dooley <conor@kernel.org>" entry where appropriate if you want to make sure I'll take a look - but I should see it anyway if it goes to the riscv list. Up to you.
diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c index 90deabfe63ea..440a3df5944c 100644 --- a/arch/riscv/kernel/cacheinfo.c +++ b/arch/riscv/kernel/cacheinfo.c @@ -115,44 +115,7 @@ static void fill_cacheinfo(struct cacheinfo **this_leaf, int init_cache_level(unsigned int cpu) { - struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); - struct device_node *np = of_cpu_device_node_get(cpu); - struct device_node *prev = NULL; - int levels = 0, leaves = 0, level; - - if (of_property_read_bool(np, "cache-size")) - ++leaves; - if (of_property_read_bool(np, "i-cache-size")) - ++leaves; - if (of_property_read_bool(np, "d-cache-size")) - ++leaves; - if (leaves > 0) - levels = 1; - - prev = np; - while ((np = of_find_next_cache_node(np))) { - of_node_put(prev); - prev = np; - if (!of_device_is_compatible(np, "cache")) - break; - if (of_property_read_u32(np, "cache-level", &level)) - break; - if (level <= levels) - break; - if (of_property_read_bool(np, "cache-size")) - ++leaves; - if (of_property_read_bool(np, "i-cache-size")) - ++leaves; - if (of_property_read_bool(np, "d-cache-size")) - ++leaves; - levels = level; - } - - of_node_put(np); - this_cpu_ci->num_levels = levels; - this_cpu_ci->num_leaves = leaves; - - return 0; + return init_of_cache_level(cpu); } int populate_cache_leaves(unsigned int cpu) diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index 4b5cd08c5a65..a4308b48dd3e 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -224,8 +224,52 @@ static int cache_setup_of_node(unsigned int cpu) return 0; } + +int init_of_cache_level(unsigned int cpu) +{ + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + struct device_node *np = of_cpu_device_node_get(cpu); + struct device_node *prev = NULL; + int levels = 0, leaves = 0, level; + + if (of_property_read_bool(np, "cache-size")) + ++leaves; + if (of_property_read_bool(np, "i-cache-size")) + ++leaves; + if (of_property_read_bool(np, "d-cache-size")) + ++leaves; + if (leaves > 0) + levels = 1; + + prev = np; + while ((np = of_find_next_cache_node(np))) { + of_node_put(prev); + prev = np; + if (!of_device_is_compatible(np, "cache")) + break; + if (of_property_read_u32(np, "cache-level", &level)) + break; + if (level <= levels) + break; + if (of_property_read_bool(np, "cache-size")) + ++leaves; + if (of_property_read_bool(np, "i-cache-size")) + ++leaves; + if (of_property_read_bool(np, "d-cache-size")) + ++leaves; + levels = level; + } + + of_node_put(np); + this_cpu_ci->num_levels = levels; + this_cpu_ci->num_leaves = leaves; + + return 0; +} + #else static inline int cache_setup_of_node(unsigned int cpu) { return 0; } +int init_of_cache_level(unsigned int cpu) { return 0; } #endif int __weak cache_setup_acpi(unsigned int cpu) diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h index 00b7a6ae8617..ff0328f3fbb0 100644 --- a/include/linux/cacheinfo.h +++ b/include/linux/cacheinfo.h @@ -80,6 +80,7 @@ struct cpu_cacheinfo { struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu); int init_cache_level(unsigned int cpu); +int init_of_cache_level(unsigned int cpu); int populate_cache_leaves(unsigned int cpu); int cache_setup_acpi(unsigned int cpu); bool last_level_cache_is_valid(unsigned int cpu);
Riscv's implementation of init_of_cache_level() is following the Devicetree Specification v0.3 regarding caches, cf.: - s3.7.3 'Internal (L1) Cache Properties' - s3.8 'Multi-level and Shared Cache Nodes' Allow reusing the implementation by moving it. Signed-off-by: Pierre Gondois <pierre.gondois@arm.com> --- arch/riscv/kernel/cacheinfo.c | 39 +------------------------------ drivers/base/cacheinfo.c | 44 +++++++++++++++++++++++++++++++++++ include/linux/cacheinfo.h | 1 + 3 files changed, 46 insertions(+), 38 deletions(-)