Module: xenomai-jki
Branch: for-upstream
Commit: ba1fbd5b44df7e60bb4c1886431e0923cab9c4e8
URL:
http://git.xenomai.org/?p=xenomai-jki.git;a=commit;h=ba1fbd5b44df7e60bb4c1886431e0923cab9c4e8
Author: Jan Kiszka <jan.kis...@siemens.com>
Date: Thu Jan 24 19:50:59 2013 +0100
x86: Disable AVX/AVX2 when emulating "noxsave"
Lacking xsave support implies absence of AVX[2], the xor module will
stumble over it (crash) when trying to find the fastest method.
Therefore, disable those features on kernels that understand it.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
include/asm-x86/ipipe/setup.h | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/include/asm-x86/ipipe/setup.h b/include/asm-x86/ipipe/setup.h
index baed275..e797739 100644
--- a/include/asm-x86/ipipe/setup.h
+++ b/include/asm-x86/ipipe/setup.h
@@ -13,6 +13,12 @@ static inline void __ipipe_early_client_setup(void)
if (cpu_has_xsave) {
setup_clear_cpu_cap(X86_FEATURE_XSAVE);
setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
+#ifdef X86_FEATURE_AVX
+ setup_clear_cpu_cap(X86_FEATURE_AVX);
+#endif
+#ifdef X86_FEATURE_AVX2
+ setup_clear_cpu_cap(X86_FEATURE_AVX2);
+#endif
printk(KERN_INFO "Xenomai: forcing noxsave");
}
}
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