Kernel: Detect support for CPUID FXSR

The fxsave and fxrstor instructions are available only if the FXSR feature is present.
Author: https://github.com/boricj Commit: fea23d0ec1 Pull-request: https://github.com/SerenityOS/serenity/pull/8067 Reviewed-by: https://github.com/awesomekling
2025-09-06 09:36:08 +00:00 · 2021-06-14 23:59:38 +02:00 · 2021-06-14 23:59:38 +02:00 · fea23d0ec1 · 2024-07-18 12:06:33 +09:00
commit fea23d0ec1
parent 90873781c1
2 changed files with 5 additions and 0 deletions
--- a/Kernel/Arch/x86/CPU.h
+++ b/Kernel/Arch/x86/CPU.h
@ -548,6 +548,7 @@ enum class CPUFeature : u32 {
    SSE4_2 = (1 << 20),
    XSAVE = (1 << 21),
    AVX = (1 << 22),
+    FXSR = (1 << 23),
 };

 class Thread;