Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752812Ab1CITRR (ORCPT ); Wed, 9 Mar 2011 14:17:17 -0500 Received: from va3ehsobe002.messaging.microsoft.com ([216.32.180.12]:29322 "EHLO VA3EHSOBE002.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751813Ab1CITRP (ORCPT ); Wed, 9 Mar 2011 14:17:15 -0500 X-SpamScore: -2 X-BigFish: VPS-2(zz146fKzz1202hzzz32i668h62h) X-Spam-TCS-SCL: 1:0 X-Forefront-Antispam-Report: KIP:(null);UIP:(null);IPVD:NLI;H:ausb3twp01.amd.com;RD:none;EFVD:NLI X-WSS-ID: 0LHT1H7-01-KUZ-02 X-M-MSG: From: Hans Rosenfeld To: , , CC: , , , , , , , Hans Rosenfeld Subject: [RFC 0/8] rework of extended state handling, LWP support Date: Wed, 9 Mar 2011 20:14:54 +0100 Message-ID: <1299698102-972771-1-git-send-email-hans.rosenfeld@amd.com> X-Mailer: git-send-email 1.5.6.5 MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2395 Lines: 53 This patch set is a general cleanup and rework of the code related to handling of FPU and otherextended states. All handling of extended states, including the FPU state, is now handled by xsave/xrstor wrappers that fall back to fxsave/fxrstor, or even fsave/frstor, if hardware support for those features is lacking. Non-lazy xstates, which cannot be restored lazily, can now be easily supported with almost no processing overhead. This makes adding basic support for AMDs LWP almost trivial. Since non-lazy xstates are inherently incompatible with lazy allocation of the xstate area, the complete removal of lazy allocation to further reduce code complexity should be considered. Since SSE-optimized library functions are widely used today, most processes would have an xstate area anyway, so the memory overhead wouldn't be big enough to be much of an issue. Hans Rosenfeld (8): x86, xsave: cleanup fpu/xsave support x86, xsave: rework fpu/xsave support x86, xsave: cleanup fpu/xsave signal frame setup x86, xsave: remove unused code x86, xsave: more cleanups x86, xsave: add support for non-lazy xstates x86, xsave: add kernel support for AMDs Lightweight Profiling (LWP) x86, xsave: remove lazy allocation of xstate area arch/x86/ia32/ia32_signal.c | 4 +- arch/x86/include/asm/i387.h | 226 +++++++------------------- arch/x86/include/asm/processor.h | 12 ++ arch/x86/include/asm/sigcontext.h | 12 ++ arch/x86/include/asm/thread_info.h | 4 +- arch/x86/include/asm/xsave.h | 99 ++--------- arch/x86/kernel/i387.c | 310 ++++-------------------------------- arch/x86/kernel/process_32.c | 29 ++--- arch/x86/kernel/process_64.c | 28 +--- arch/x86/kernel/signal.c | 4 +- arch/x86/kernel/traps.c | 47 +----- arch/x86/kernel/xsave.c | 313 +++++++++++++++++++++++------------- arch/x86/kvm/vmx.c | 2 +- arch/x86/kvm/x86.c | 11 +- arch/x86/math-emu/fpu_entry.c | 8 +- drivers/lguest/x86/core.c | 2 +- 16 files changed, 373 insertions(+), 738 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/