linux-kernel - [PATCH v3 0/2] x86 FPU API

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Message-Id: <1273135546-29690-1-git-send-email-avi@redhat.com>
Date:	Thu,  6 May 2010 11:45:44 +0300
From:	Avi Kivity <avi@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Brian Gerst <brgerst@...il.com>,
	Dexuan Cui <dexuan.cui@...el.com>,
	Sheng Yang <sheng@...ux.intel.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: [PATCH v3 0/2] x86 FPU API

Currently all fpu accessors are wedded to task_struct.  However kvm also uses
the fpu in a different context.  Introduce an FPU API, and replace the
current uses with the new API.

While this patchset is oriented towards deeper changes, as a first step it
simlifies xsave for kvm.

v3:
	use u8 instead of bool in asm to avoid bad code generation on older
        gccs.

v2:
	eliminate useless padding in use_xsave() by using a larger instruction

Avi Kivity (2):
  x86: eliminate TS_XSAVE
  x86: Introduce 'struct fpu' and related API

 arch/x86/include/asm/i387.h        |  135 +++++++++++++++++++++++++++---------
 arch/x86/include/asm/processor.h   |    6 ++-
 arch/x86/include/asm/thread_info.h |    1 -
 arch/x86/include/asm/xsave.h       |    7 +-
 arch/x86/kernel/cpu/common.c       |    5 +-
 arch/x86/kernel/i387.c             |  107 ++++++++++++++---------------
 arch/x86/kernel/process.c          |   20 +++---
 arch/x86/kernel/process_32.c       |    2 +-
 arch/x86/kernel/process_64.c       |    2 +-
 arch/x86/kernel/xsave.c            |    8 +-
 arch/x86/math-emu/fpu_aux.c        |    6 +-
 11 files changed, 181 insertions(+), 118 deletions(-)

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