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2016-04-13x86/cpufeature: Replace cpu_has_avx with boot_cpu_has() usageBorislav Petkov
Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-crypto@vger.kernel.org Link: http://lkml.kernel.org/r/1459801503-15600-4-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-31x86/cpufeature: Remove cpu_has_osxsaveBorislav Petkov
Use boot_cpu_has() instead. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-crypto@vger.kernel.org Link: http://lkml.kernel.org/r/1459266123-21878-4-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19x86/fpu: Rename i387.h to fpu/api.hIngo Molnar
We already have fpu/types.h, move i387.h to fpu/api.h. The file name has become a misnomer anyway: it offers generic FPU APIs, but is not limited to i387 functionality. Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Andy Lutomirski <luto@amacapital.net> 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: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-08-21crypto: xor - Check for osxsave as well as avx in crypto/xorJohn Haxby
This affects xen pv guests with sufficiently old versions of xen and sufficiently new hardware. On such a system, a guest with a btrfs root won't even boot. Signed-off-by: John Haxby <john.haxby@oracle.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2012-09-18x86, fpu: always use kernel_fpu_begin/end() for in-kernel FPU usageSuresh Siddha
use kernel_fpu_begin/end() instead of unconditionally accessing cr0 and saving/restoring just the few used xmm/ymm registers. This has some advantages like: * If the task's FPU state is already active, then kernel_fpu_begin() will just save the user-state and avoiding the read/write of cr0. In general, cr0 accesses are much slower. * Manual save/restore of xmm/ymm registers will affect the 'modified' and the 'init' optimizations brought in the by xsaveopt/xrstor infrastructure. * Foward compatibility with future vector register extensions will be a problem if the xmm/ymm registers are manually saved and restored (corrupting the extended state of those vector registers). With this patch, there was no significant difference in the xor throughput using AVX, measured during boot. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Link: http://lkml.kernel.org/r/1345842782-24175-5-git-send-email-suresh.b.siddha@intel.com Cc: Jim Kukunas <james.t.kukunas@linux.intel.com> Cc: NeilBrown <neilb@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-05-22raid5: add AVX optimized RAID5 checksummingJim Kukunas
Optimize RAID5 xor checksumming by taking advantage of 256-bit YMM registers introduced in AVX. Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>