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x86_64/context: fix check for xsave

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Matheus
2025-12-27 17:23:21 -03:00
parent b1640a3c10
commit c9c2471796
1 changed files with 3 additions and 2 deletions
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kernel-src/arch/x86-64/context.c
+3 -2
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@@ -42,10 +42,11 @@ typedef struct {
void arch_extracontext_detect(void) { void arch_extracontext_detect(void) {
if (!arch_xsave_size) { if (!arch_xsave_size) {
if (cpuid_base_max_leaf() >= 0x0d) { cpuid_results_t results;
cpuid(1, &results);
if (cpuid_base_max_leaf() >= 0x0d && (results.ecx & (1 << 26))) {
xsave_method = XSAVE; xsave_method = XSAVE;
cpuid_results_t results;
cpuid_with_ecx(0x0d, 0, &results); cpuid_with_ecx(0x0d, 0, &results);
xcr0_value = ((uint64_t)results.edx << 32) | results.eax; xcr0_value = ((uint64_t)results.edx << 32) | results.eax;
xcr0_value &= XCR0_MASK; xcr0_value &= XCR0_MASK;