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Groups > linux.kernel > #1536576
| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC PATCH 4/6] x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message |
| Date | 2016-12-06 02:10 +0100 |
| Message-ID | <sLcqB-3CS-13@gated-at.bofh.it> (permalink) |
| References | <sLcqB-3CS-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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 <luto@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
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[RFC PATCH 0/6] CPUID and FPU fixes Andy Lutomirski <luto@kernel.org> - 2016-12-06 02:10 +0100
[RFC PATCH 4/6] x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message Andy Lutomirski <luto@kernel.org> - 2016-12-06 02:10 +0100
Re: [RFC PATCH 4/6] x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message Borislav Petkov <bp@alien8.de> - 2016-12-06 10:30 +0100
Re: [RFC PATCH 4/6] x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message Andy Lutomirski <luto@amacapital.net> - 2016-12-06 19:10 +0100
Re: [RFC PATCH 4/6] x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message Borislav Petkov <bp@alien8.de> - 2016-12-06 19:10 +0100
[RFC PATCH 5/6] x86/fpu: Fix CPUID-less FPU detection Andy Lutomirski <luto@kernel.org> - 2016-12-06 02:10 +0100
Re: [RFC PATCH 5/6] x86/fpu: Fix CPUID-less FPU detection Borislav Petkov <bp@alien8.de> - 2016-12-06 10:50 +0100
Re: [RFC PATCH 5/6] x86/fpu: Fix CPUID-less FPU detection Andy Lutomirski <luto@amacapital.net> - 2016-12-06 19:00 +0100
Re: [RFC PATCH 5/6] x86/fpu: Fix CPUID-less FPU detection Borislav Petkov <bp@alien8.de> - 2016-12-07 10:50 +0100
[RFC PATCH 6/6] x86/fpu: Fix the "Giving up, no FPU found" test Andy Lutomirski <luto@kernel.org> - 2016-12-06 02:10 +0100
[RFC PATCH 3/6] x86/cpu: Re-apply forced caps every time cpu caps are re-read Andy Lutomirski <luto@kernel.org> - 2016-12-06 02:10 +0100
Re: [RFC PATCH 3/6] x86/cpu: Re-apply forced caps every time cpu caps are re-read Borislav Petkov <bp@alien8.de> - 2016-12-06 10:00 +0100
[RFC PATCH 2/6] x86/cpu: Factor out application of forced cpu caps Andy Lutomirski <luto@kernel.org> - 2016-12-06 02:10 +0100
Re: [RFC PATCH 2/6] x86/cpu: Factor out application of forced cpu caps Borislav Petkov <bp@alien8.de> - 2016-12-06 09:40 +0100
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