That message isn't at all clear -- what does "Legacy x87" even
mean?
Clarify it. If there's no FPU, say "x86/fpu: No FPU detected". If
there's an FPU that doesn't have XSAVE, say "x86/fpu: Pre-XSAVE x87
FPU detected".
Signed-off-by: Andy Lutomirski <l...@kernel.org>
---
arch/x86/kernel/fpu/xstate.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 1d7770447b3e..2d592b1c75e4 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -705,8 +705,13 @@ void __init fpu__init_system_xstate(void)
WARN_ON_FPU(!on_boot_cpu);
on_boot_cpu = 0;
+ if (!boot_cpu_has(X86_FEATURE_FPU)) {
+ pr_info("x86/fpu: No FPU detected.\n");
+ return;
+ }
+
if (!boot_cpu_has(X86_FEATURE_XSAVE)) {
- pr_info("x86/fpu: Legacy x87 FPU detected.\n");
+ pr_info("x86/fpu: Pre-XSAVE x87 FPU detected.\n");
return;
}
--
2.9.3
