Messages in this thread Patch in this message | | | From | Al Stone <> | Subject | [PATCH 2/3] arm64: cpuinfo: add human readable CPU names to /proc/cpuinfo | Date | Tue, 26 Sep 2017 16:23:23 -0600 |
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In the interest of making things easier for humans to use, add a "CPU name" line to /proc/cpuinfo for each CPU that uses plain old words instead of hex values. For example, instead of printing only CPU implementer 0x43 and CPU part 0x0A1, print also "CPU name : Cavium ThunderX".
Note that this is not meant to be an exhaustive list of all possible implementers or CPUs (I'm not even sure that is knowable); this patch is intentionally limited to only those willing to provide info in arch/arm64/include/asm/cputype.h
Signed-off-by: Al Stone <ahs3@redhat.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> --- arch/arm64/kernel/cpuinfo.c | 84 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+)
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index e505007138eb..0b4261884862 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -75,6 +75,61 @@ static const char *const hwcap_str[] = { NULL }; +struct hw_part { + u16 id; + char *name; +}; + +static const struct hw_part arm_hw_part[] = { + { ARM_CPU_PART_AEM_V8, "AEMv8 Model" }, + { ARM_CPU_PART_FOUNDATION, "Foundation Model" }, + { ARM_CPU_PART_CORTEX_A57, "Cortex A57" }, + { ARM_CPU_PART_CORTEX_A53, "Cortex A53" }, + { ARM_CPU_PART_CORTEX_A73, "Cortex A73" }, + { (-1), "unknown" } /* Potenza == 0, unfortunately */ +}; + +static const struct hw_part apm_hw_part[] = { + { APM_CPU_PART_POTENZA, "Potenza" }, + { (-1), "unknown" } /* Potenza == 0, unfortunately */ +}; + +static const struct hw_part brcm_hw_part[] = { + { BRCM_CPU_PART_VULCAN, "Vulcan" }, + { (-1), "unknown" } /* Potenza == 0, unfortunately */ +}; + +static const struct hw_part cavium_hw_part[] = { + { CAVIUM_CPU_PART_THUNDERX, "ThunderX" }, + { CAVIUM_CPU_PART_THUNDERX_81XX, "ThunderX 81XX" }, + { CAVIUM_CPU_PART_THUNDERX_83XX, "ThunderX 83XX" }, + { (-1), "unknown" } /* Potenza == 0, unfortunately */ +}; + +static const struct hw_part qcom_hw_part[] = { + { QCOM_CPU_PART_FALKOR_V1, "Falkor v1" }, + { (-1), "unknown" } /* Potenza == 0, unfortunately */ +}; + +static const struct hw_part unknown_hw_part[] = { + { (-1), "unknown" } /* Potenza == 0, unfortunately */ +}; + +struct hw_impl { + u8 id; + const struct hw_part *parts; + char *name; +}; + +static const struct hw_impl hw_implementer[] = { + { ARM_CPU_IMP_ARM, arm_hw_part, "ARM Ltd." }, + { ARM_CPU_IMP_APM, apm_hw_part, "Applied Micro" }, + { ARM_CPU_IMP_CAVIUM, cavium_hw_part, "Cavium" }, + { ARM_CPU_IMP_BRCM, brcm_hw_part, "Broadcom" }, + { ARM_CPU_IMP_QCOM, qcom_hw_part, "Qualcomm" }, + { 0, unknown_hw_part, "unknown" } +}; + #ifdef CONFIG_COMPAT static const char *const compat_hwcap_str[] = { "swp", @@ -116,6 +171,9 @@ static int c_show(struct seq_file *m, void *v) { int i, j; bool compat = personality(current->personality) == PER_LINUX32; + u8 impl; + u16 part; + const struct hw_part *parts; for_each_online_cpu(i) { struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i); @@ -132,6 +190,32 @@ static int c_show(struct seq_file *m, void *v) seq_printf(m, "model name\t: ARMv8 Processor rev %d (%s)\n", MIDR_REVISION(midr), COMPAT_ELF_PLATFORM); + impl = (u8) MIDR_IMPLEMENTOR(midr); + for (j = 0; hw_implementer[j].id != 0; j++) { + if (hw_implementer[j].id == impl) { + seq_printf(m, "CPU name\t: %s ", + hw_implementer[j].name); + parts = hw_implementer[j].parts; + break; + } + } + if (hw_implementer[j].id == 0) { + seq_printf(m, "CPU name\t: %s ", + hw_implementer[j].name); + parts = hw_implementer[j].parts; + } + + part = (u16) MIDR_PARTNUM(midr); + for (j = 0; parts[j].id != (-1); j++) { + if (parts[j].id == part) { + seq_printf(m, "%s\n", parts[j].name); + break; + } + } + if (parts[j].id == (-1)) + seq_printf(m, "%s", parts[j].name); + seq_puts(m, "\n"); + seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", loops_per_jiffy / (500000UL/HZ), loops_per_jiffy / (5000UL/HZ) % 100); -- 2.13.5
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