diff options
| author | Andy Lutomirski <luto@kernel.org> | 2017-01-18 20:15:40 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-01-25 10:12:42 +0100 |
| commit | 9170fb409437b246078bcad3f1481d32dfe2ca28 (patch) | |
| tree | e88f57da92bd68af26d63fd5a6330f8f513bd91a /arch/x86/kernel/fpu | |
| parent | x86/cpu: Re-apply forced caps every time CPU caps are re-read (diff) | |
| download | linux-9170fb409437b246078bcad3f1481d32dfe2ca28.tar.xz linux-9170fb409437b246078bcad3f1481d32dfe2ca28.zip | |
x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message
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: x87 FPU will use FSAVE|FXSAVE
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Whitehead <tedheadster@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/bb839385e18e27bca23fe8666dfdad8170473045.1484705016.git.luto@kernel.org
[ Small tweaks to the messages. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/fpu')
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 1d7770447b3e..96002f19c113 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -705,8 +705,14 @@ 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: x87 FPU will use %s\n", + boot_cpu_has(X86_FEATURE_FXSR) ? "FXSAVE" : "FSAVE"); return; } |