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kernel/x86: skip dumping non-boot cpu features if they are same

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Change-Id: If10dbeb24d6a5bf602ae02ef1d18d3fd160bff11
Reviewed-on: https://review.haiku-os.org/c/haiku/+/11289
Haiku-Format: Haiku-format Bot <[email protected]>
Reviewed-by: waddlesplash <[email protected]>
(cherry picked from commit 5488ba1717bf161c29ff4821d7511f2728aa470b)
Reviewed-on: https://review.haiku-os.org/c/haiku/+/11290
This commit is contained in:
Jérôme Duval
2026-07-21 19:12:52 +00:00
committed by waddlesplash
parent 1f0f4c0937
commit be4df85d25
1 changed files with 11 additions and 0 deletions
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src/system/kernel/arch/x86/arch_cpu.cpp
+11
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@@ -380,6 +380,15 @@ dump_feature_string(int currentCPU, cpu_ent* cpu)
char features[768]; char features[768];
features[0] = 0; features[0] = 0;
if (currentCPU > 0) {
// skip if the non-boot cpu features are same as the boot cpu ones
bool sameAsBoot = true;
for (int i = 0; i < FEATURE_NUM; i++)
sameAsBoot &= (cpu->arch.feature[i] == gCPU[0].arch.feature[i]);
if (sameAsBoot)
return;
}
if (cpu->arch.feature[FEATURE_COMMON] & IA32_FEATURE_FPU) if (cpu->arch.feature[FEATURE_COMMON] & IA32_FEATURE_FPU)
strlcat(features, "fpu ", sizeof(features)); strlcat(features, "fpu ", sizeof(features));
if (cpu->arch.feature[FEATURE_COMMON] & IA32_FEATURE_VME) if (cpu->arch.feature[FEATURE_COMMON] & IA32_FEATURE_VME)
@@ -1930,6 +1939,8 @@ arch_cpu_init_post_vm(kernel_args* args)
FEATURE_D_1_EAX); FEATURE_D_1_EAX);
call_all_cpus_sync(&enable_osxsave, NULL); call_all_cpus_sync(&enable_osxsave, NULL);
// also enable the cached boot cpu feature bit
gCPU[0].arch.feature[FEATURE_EXT] |= IA32_FEATURE_EXT_OSXSAVE;
gXsaveMask = IA32_XCR0_X87 | IA32_XCR0_SSE; gXsaveMask = IA32_XCR0_X87 | IA32_XCR0_SSE;
cpuid_info cpuid; cpuid_info cpuid;
get_current_cpuid(&cpuid, IA32_CPUID_LEAF_XSTATE, 0); get_current_cpuid(&cpuid, IA32_CPUID_LEAF_XSTATE, 0);