ARM: display machine model in cpuinfo
PATCH 1/1 ARM: display machine model in cpuinfo
This may be useful to display hardware model in the /proc/cpuinfo. It definitely helps to identify the device and there are some archs already doing that (arm64, m32r, mips).
Use the model from DT and add it to the cpuinfo.
--- arch/arm/kernel/setup.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
arch/arm/kernel/setup.c +5 -2
@@ -145,6 +145,7 @@ EXPORT_SYMBOL(elf_platform);static const char *cpu_name;static const char *machine_name; +static const char *hardware;static char __initdata cmd_line[COMMAND_LINE_SIZE ];const struct machine_desc *machine_desc__initdata ;
@@ -899,7 +900,8 @@ void __init setup_arch(char **cmdline_p)if (!mdesc) mdesc =setup_machine_tags (__atags_pointer, __machine_arch_type); machine_desc = mdesc; - machine_name = mdesc->name; + machine_name =of_flat_dt_get_machine_name (); + hardware = mdesc->name;if (mdesc->reboot_mode !=REBOOT_HARD ) reboot_mode = mdesc->reboot_mode;
@@ -1077,7 +1079,8 @@ static int c_show(struct seq_file *m, void *v)seq_printf (m,"CPU revision\t: %d\n\n" , cpuid &15 ); } -seq_printf (m,"Hardware\t: %s\n" , machine_name); +seq_printf (m,"Machine\t\t: %s\n" , machine_name); +seq_printf (m,"Hardware\t: %s\n" , hardware);seq_printf (m,"Revision\t: %04x\n" , system_rev);seq_printf (m,"Serial\t\t: %08x%08x\n" , system_serial_high, system_serial_low);
Signature · 1 line
1.8.4.5
PATCH 1/1 ARM: display machine model in cpuinfo
Quoted 3 lines · Rafa? Mi?ecki
This may be useful to display hardware model in the
/proc/cpuinfo. It definitely helps to identify the device and there are some archs already doing that (arm64, m32r, mips).
Not true for arm64, if you look in linux-next.
I'm rather wary of exposing this kind via cpuinfo because it's completely arbitrary in nature and not guaranteed to be in any way useful (I have seen dtbs where the model string is misleading due to copy+paste and no modificiation).
Mark.
Quoted 47 lines
Use the model from DT and add it to the cpuinfo.
Signed-off-by Rafa? Mi?ecki <[email protected]>--- arch/arm/kernel/setup.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)arch/arm/kernel/setup.c +5
-2@@ -145,6 +145,7 @@ EXPORT_SYMBOL(elf_platform);static const char *cpu_name;static const char *machine_name; +static const char *hardware;static char __initdata cmd_line[COMMAND_LINE_SIZE ];const struct machine_desc *machine_desc__initdata ;@@ -899,7 +900,8 @@ void __init setup_arch(char **cmdline_p)if (!mdesc) mdesc =setup_machine_tags (__atags_pointer, __machine_arch_type); machine_desc = mdesc; - machine_name = mdesc->name; + machine_name =of_flat_dt_get_machine_name (); + hardware = mdesc->name;if (mdesc->reboot_mode !=REBOOT_HARD ) reboot_mode = mdesc->reboot_mode;@@ -1077,7 +1079,8 @@ static int c_show(struct seq_file *m, void *v)seq_printf (m,"CPU revision\t: %d\n\n" , cpuid &15 ); } -seq_printf (m,"Hardware\t: %s\n" , machine_name); +seq_printf (m,"Machine\t\t: %s\n" , machine_name); +seq_printf (m,"Hardware\t: %s\n" , hardware);seq_printf (m,"Revision\t: %04x\n" , system_rev);seq_printf (m,"Serial\t\t: %08x%08x\n" , system_serial_high, system_serial_low);Signature · 7 lines
1.8.4.5 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel at lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
PATCH 1/1 ARM: display machine model in cpuinfo
Quoted 11 lines · Mark Rutland
Quoted 3 lines · Rafa? Mi?ecki
This may be useful to display hardware model in the
/proc/cpuinfo. It definitely helps to identify the device and there are some archs already doing that (arm64, m32r, mips).Not true for arm64, if you look in linux-next.
I'm rather wary of exposing this kind via cpuinfo because it's completely arbitrary in nature and not guaranteed to be in any way useful (I have seen dtbs where the model string is misleading due to copy+paste and no modificiation).
I wonder what's wrong with reading it from /sys/firmware/devicetree/base/model if that exists, if not falling back to reading it from /proc/cpuinfo.
Even better of course to use /sys/firmware/devicetree/base/compatible
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