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Message-ID: <167822889002.5837.2464794663329420874.tip-bot2@tip-bot2> Date: Tue, 07 Mar 2023 22:41:30 -0000 From: "tip-bot2 for Borislav Petkov (AMD)" <tip-bot2@...utronix.de> To: linux-tip-commits@...r.kernel.org Cc: "Borislav Petkov (AMD)" <bp@...en8.de>, Terry Bowman <terry.bowman@....com>, Feng Tang <feng.tang@...el.com>, x86@...nel.org, linux-kernel@...r.kernel.org Subject: [tip: x86/misc] tools/x86/kcpuid: Dump the CPUID function in detailed view The following commit has been merged into the x86/misc branch of tip: Commit-ID: cd3ad6619517cda3a055d864a85cebbd434dba9a Gitweb: https://git.kernel.org/tip/cd3ad6619517cda3a055d864a85cebbd434dba9a Author: Borislav Petkov (AMD) <bp@...en8.de> AuthorDate: Mon, 06 Feb 2023 08:18:32 -06:00 Committer: Borislav Petkov (AMD) <bp@...en8.de> CommitterDate: Tue, 07 Mar 2023 23:35:44 +01:00 tools/x86/kcpuid: Dump the CPUID function in detailed view Sometimes it is useful to know which CPUID leaf contains the fields so add it to -d output so that it looks like this: CPUID_0x8000001e_ECX[0x0]: extended_apic_id : 0x8 - Extended APIC ID core_id : 0x4 - Identifies the logical core ID threads_per_core : 0x1 - The number of threads per core is threads_per_core + 1 node_id : 0x0 - Node ID nodes_per_processor : 0x0 - Nodes per processor { 0: 1 node, else reserved } CPUID_0x8000001f_ECX[0x0]: sme - Secure Memory Encryption ... Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de> Signed-off-by: Terry Bowman <terry.bowman@....com> Reviewed-by: Feng Tang <feng.tang@...el.com> Link: https://lore.kernel.org/r/20230206141832.4162264-4-terry.bowman@amd.com --- tools/arch/x86/kcpuid/kcpuid.c | 32 +++++++++++++++++++++++++------- 1 file changed, 25 insertions(+), 7 deletions(-) diff --git a/tools/arch/x86/kcpuid/kcpuid.c b/tools/arch/x86/kcpuid/kcpuid.c index dae7551..416f5b3 100644 --- a/tools/arch/x86/kcpuid/kcpuid.c +++ b/tools/arch/x86/kcpuid/kcpuid.c @@ -33,7 +33,7 @@ struct reg_desc { struct bits_desc descs[32]; }; -enum { +enum cpuid_reg { R_EAX = 0, R_EBX, R_ECX, @@ -41,6 +41,10 @@ enum { NR_REGS }; +static const char * const reg_names[] = { + "EAX", "EBX", "ECX", "EDX", +}; + struct subleaf { u32 index; u32 sub; @@ -428,12 +432,18 @@ static void parse_text(void) /* Decode every eax/ebx/ecx/edx */ -static void decode_bits(u32 value, struct reg_desc *rdesc) +static void decode_bits(u32 value, struct reg_desc *rdesc, enum cpuid_reg reg) { struct bits_desc *bdesc; int start, end, i; u32 mask; + if (!rdesc->nr) { + if (show_details) + printf("\t %s: 0x%08x\n", reg_names[reg], value); + return; + } + for (i = 0; i < rdesc->nr; i++) { bdesc = &rdesc->descs[i]; @@ -468,13 +478,21 @@ static void show_leaf(struct subleaf *leaf) if (!leaf) return; - if (show_raw) + if (show_raw) { leaf_print_raw(leaf); + } else { + if (show_details) + printf("CPUID_0x%x_ECX[0x%x]:\n", + leaf->index, leaf->sub); + } + + decode_bits(leaf->eax, &leaf->info[R_EAX], R_EAX); + decode_bits(leaf->ebx, &leaf->info[R_EBX], R_EBX); + decode_bits(leaf->ecx, &leaf->info[R_ECX], R_ECX); + decode_bits(leaf->edx, &leaf->info[R_EDX], R_EDX); - decode_bits(leaf->eax, &leaf->info[R_EAX]); - decode_bits(leaf->ebx, &leaf->info[R_EBX]); - decode_bits(leaf->ecx, &leaf->info[R_ECX]); - decode_bits(leaf->edx, &leaf->info[R_EDX]); + if (!show_raw && show_details) + printf("\n"); } static void show_func(struct cpuid_func *func)
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