On Mon, 19 Oct 2009 11:53:33 +0900 Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote: > On Wed, Sep 16, 2009 at 09:35:46AM +0800, Huang Ying wrote: > > PCLMULQDQ is used to accelerate the most time-consuming part of GHASH, > > carry-less multiplication. More information about PCLMULQDQ can be > > found at: > > > > http://software.intel.com/en-us/articles/carry-less-multiplication-and-its-usage-for-computing-the-gcm-mode/ > > > > Because PCLMULQDQ changes XMM state, its usage must be enclosed with > > kernel_fpu_begin/end, which can be used only in process context, the > > acceleration is implemented as crypto_ahash. That is, request in soft > > IRQ context will be defered to the cryptd kernel thread. > > > > v4: > > - Fix some style issues. > > > > v3: > > - Revise GHASH implementation, performance increase about 2x. > > > > Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx> > > Patch applied to cryptodev. Thanks! x86_64 allmodconfig, GNU assembler 2.16.1: arch/x86/crypto/ghash-clmulni-intel_asm.S: Assembler messages: arch/x86/crypto/ghash-clmulni-intel_asm.S:103: Error: no such instruction: `pshufb %xmm5,%xmm0' arch/x86/crypto/ghash-clmulni-intel_asm.S:105: Error: no such instruction: `pshufb %xmm5,%xmm0' arch/x86/crypto/ghash-clmulni-intel_asm.S:119: Error: no such instruction: `pshufb %xmm5,%xmm0' arch/x86/crypto/ghash-clmulni-intel_asm.S:123: Error: no such instruction: `pshufb %xmm5,%xmm6' arch/x86/crypto/ghash-clmulni-intel_asm.S:130: Error: no such instruction: `pshufb %xmm5,%xmm0' arch/x86/crypto/ghash-clmulni-intel_asm.S:143: Error: no such instruction: `pshufb %xmm5,%xmm0' -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
