diff mbox series

[V2,13/21] RISC-V: cpu: Enable cpuinfo for ACPI systems

Message ID 20230216182043.1946553-14-sunilvl@ventanamicro.com
State New
Headers
Series Add basic ACPI support for RISC-V |

Commit Message

Sunil V L Feb. 16, 2023, 6:20 p.m. UTC 
  On ACPI based platforms, few details like ISA need to be read
from the ACPI table. Enable cpuinfo on ACPI based systems.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 arch/riscv/kernel/cpu.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

Comments

Andrew Jones Feb. 20, 2023, 5:54 p.m. UTC | #1 
On Thu, Feb 16, 2023 at 11:50:35PM +0530, Sunil V L wrote:
> On ACPI based platforms, few details like ISA need to be read
> from the ACPI table. Enable cpuinfo on ACPI based systems.
> 
> Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
>  arch/riscv/kernel/cpu.c | 31 ++++++++++++++++++++++++-------
>  1 file changed, 24 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
> index 1b9a5a66e55a..a227c0661b19 100644
> --- a/arch/riscv/kernel/cpu.c
> +++ b/arch/riscv/kernel/cpu.c
> @@ -3,10 +3,12 @@
>   * Copyright (C) 2012 Regents of the University of California
>   */
>  
> +#include <linux/acpi.h>
>  #include <linux/cpu.h>
>  #include <linux/init.h>
>  #include <linux/seq_file.h>
>  #include <linux/of.h>
> +#include <asm/acpi.h>
>  #include <asm/csr.h>
>  #include <asm/hwcap.h>
>  #include <asm/sbi.h>
> @@ -256,26 +258,41 @@ static void c_stop(struct seq_file *m, void *v)
>  {
>  }
>  
> +static void acpi_print_hart_info(struct seq_file *m, unsigned long cpu)
> +{
> +	const char *isa;
> +
> +	if (!acpi_get_riscv_isa(NULL, get_acpi_id_for_cpu(cpu), &isa))
> +		print_isa(m, isa);
> +}
> +
>  static int c_show(struct seq_file *m, void *v)
>  {
>  	unsigned long cpu_id = (unsigned long)v - 1;
> -	struct device_node *node = of_get_cpu_node(cpu_id, NULL);
>  	struct riscv_cpuinfo *ci = per_cpu_ptr(&riscv_cpuinfo, cpu_id);
> +	struct device_node *node;
>  	const char *compat, *isa;
>  
>  	seq_printf(m, "processor\t: %lu\n", cpu_id);
>  	seq_printf(m, "hart\t\t: %lu\n", cpuid_to_hartid_map(cpu_id));
> -	if (!of_property_read_string(node, "riscv,isa", &isa))
> -		print_isa(m, isa);
> +
> +	if (acpi_disabled) {
> +		node = of_get_cpu_node(cpu_id, NULL);
> +		if (!of_property_read_string(node, "riscv,isa", &isa))
> +			print_isa(m, isa);
> +		if (!of_property_read_string(node, "compatible", &compat) &&
> +		    strcmp(compat, "riscv"))
> +			seq_printf(m, "uarch\t\t: %s\n", compat);
> +		of_node_put(node);
> +	} else {
> +		acpi_print_hart_info(m, cpu_id);

I don't think we need the helper function for the two lines which would
otherwise nicely complement the two similar DT lines above.

> +	}
> +
>  	print_mmu(m);
> -	if (!of_property_read_string(node, "compatible", &compat)
> -	    && strcmp(compat, "riscv"))
> -		seq_printf(m, "uarch\t\t: %s\n", compat);

This will now print uarch before mmu for DT systems.

>  	seq_printf(m, "mvendorid\t: 0x%lx\n", ci->mvendorid);
>  	seq_printf(m, "marchid\t\t: 0x%lx\n", ci->marchid);
>  	seq_printf(m, "mimpid\t\t: 0x%lx\n", ci->mimpid);
>  	seq_puts(m, "\n");
> -	of_node_put(node);
>  
>  	return 0;
>  }
> -- 
> 2.34.1
>

Thanks,
drew
Sunil V L Feb. 24, 2023, 12:27 p.m. UTC | #2 
On Mon, Feb 20, 2023 at 06:54:29PM +0100, Andrew Jones wrote:
> On Thu, Feb 16, 2023 at 11:50:35PM +0530, Sunil V L wrote:
> > On ACPI based platforms, few details like ISA need to be read
> > from the ACPI table. Enable cpuinfo on ACPI based systems.
> > 
> > Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> > ---
> >  arch/riscv/kernel/cpu.c | 31 ++++++++++++++++++++++++-------
> >  1 file changed, 24 insertions(+), 7 deletions(-)
> > 
> > diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
> > index 1b9a5a66e55a..a227c0661b19 100644
> > --- a/arch/riscv/kernel/cpu.c
> > +++ b/arch/riscv/kernel/cpu.c
> > @@ -3,10 +3,12 @@
> >   * Copyright (C) 2012 Regents of the University of California
> >   */
> >  
> > +#include <linux/acpi.h>
> >  #include <linux/cpu.h>
> >  #include <linux/init.h>
> >  #include <linux/seq_file.h>
> >  #include <linux/of.h>
> > +#include <asm/acpi.h>
> >  #include <asm/csr.h>
> >  #include <asm/hwcap.h>
> >  #include <asm/sbi.h>
> > @@ -256,26 +258,41 @@ static void c_stop(struct seq_file *m, void *v)
> >  {
> >  }
> >  
> > +static void acpi_print_hart_info(struct seq_file *m, unsigned long cpu)
> > +{
> > +	const char *isa;
> > +
> > +	if (!acpi_get_riscv_isa(NULL, get_acpi_id_for_cpu(cpu), &isa))
> > +		print_isa(m, isa);
> > +}
> > +
> >  static int c_show(struct seq_file *m, void *v)
> >  {
> >  	unsigned long cpu_id = (unsigned long)v - 1;
> > -	struct device_node *node = of_get_cpu_node(cpu_id, NULL);
> >  	struct riscv_cpuinfo *ci = per_cpu_ptr(&riscv_cpuinfo, cpu_id);
> > +	struct device_node *node;
> >  	const char *compat, *isa;
> >  
> >  	seq_printf(m, "processor\t: %lu\n", cpu_id);
> >  	seq_printf(m, "hart\t\t: %lu\n", cpuid_to_hartid_map(cpu_id));
> > -	if (!of_property_read_string(node, "riscv,isa", &isa))
> > -		print_isa(m, isa);
> > +
> > +	if (acpi_disabled) {
> > +		node = of_get_cpu_node(cpu_id, NULL);
> > +		if (!of_property_read_string(node, "riscv,isa", &isa))
> > +			print_isa(m, isa);
> > +		if (!of_property_read_string(node, "compatible", &compat) &&
> > +		    strcmp(compat, "riscv"))
> > +			seq_printf(m, "uarch\t\t: %s\n", compat);
> > +		of_node_put(node);
> > +	} else {
> > +		acpi_print_hart_info(m, cpu_id);
> 
> I don't think we need the helper function for the two lines which would
> otherwise nicely complement the two similar DT lines above.
> 
Agree. Let me remove it.

> > +	}
> > +
> >  	print_mmu(m);
> > -	if (!of_property_read_string(node, "compatible", &compat)
> > -	    && strcmp(compat, "riscv"))
> > -		seq_printf(m, "uarch\t\t: %s\n", compat);
> 
> This will now print uarch before mmu for DT systems.
> 
Yeah. Let me fix it.

Thanks,
Sunil
diff mbox series

Patch

diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index 1b9a5a66e55a..a227c0661b19 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -3,10 +3,12 @@ 
  * Copyright (C) 2012 Regents of the University of California
  */
 
+#include <linux/acpi.h>
 #include <linux/cpu.h>
 #include <linux/init.h>
 #include <linux/seq_file.h>
 #include <linux/of.h>
+#include <asm/acpi.h>
 #include <asm/csr.h>
 #include <asm/hwcap.h>
 #include <asm/sbi.h>
@@ -256,26 +258,41 @@  static void c_stop(struct seq_file *m, void *v)
 {
 }
 
+static void acpi_print_hart_info(struct seq_file *m, unsigned long cpu)
+{
+	const char *isa;
+
+	if (!acpi_get_riscv_isa(NULL, get_acpi_id_for_cpu(cpu), &isa))
+		print_isa(m, isa);
+}
+
 static int c_show(struct seq_file *m, void *v)
 {
 	unsigned long cpu_id = (unsigned long)v - 1;
-	struct device_node *node = of_get_cpu_node(cpu_id, NULL);
 	struct riscv_cpuinfo *ci = per_cpu_ptr(&riscv_cpuinfo, cpu_id);
+	struct device_node *node;
 	const char *compat, *isa;
 
 	seq_printf(m, "processor\t: %lu\n", cpu_id);
 	seq_printf(m, "hart\t\t: %lu\n", cpuid_to_hartid_map(cpu_id));
-	if (!of_property_read_string(node, "riscv,isa", &isa))
-		print_isa(m, isa);
+
+	if (acpi_disabled) {
+		node = of_get_cpu_node(cpu_id, NULL);
+		if (!of_property_read_string(node, "riscv,isa", &isa))
+			print_isa(m, isa);
+		if (!of_property_read_string(node, "compatible", &compat) &&
+		    strcmp(compat, "riscv"))
+			seq_printf(m, "uarch\t\t: %s\n", compat);
+		of_node_put(node);
+	} else {
+		acpi_print_hart_info(m, cpu_id);
+	}
+
 	print_mmu(m);
-	if (!of_property_read_string(node, "compatible", &compat)
-	    && strcmp(compat, "riscv"))
-		seq_printf(m, "uarch\t\t: %s\n", compat);
 	seq_printf(m, "mvendorid\t: 0x%lx\n", ci->mvendorid);
 	seq_printf(m, "marchid\t\t: 0x%lx\n", ci->marchid);
 	seq_printf(m, "mimpid\t\t: 0x%lx\n", ci->mimpid);
 	seq_puts(m, "\n");
-	of_node_put(node);
 
 	return 0;
 }