linux-toradex.git/arch/x86/include/asm/xsave.h, branch v3.4.78

Merge branch 'x86-xsave-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-08-06T23:25:13+00:00

* 'x86-xsave-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, xsave: Make xstate_enable_boot_cpu() __init, protect on CPU 0
  x86, xsave: Add __init attribute to setup_xstate_features()
  x86, xsave: Make init_xstate_buf static
  x86, xsave: Check cpuid level for XSTATE_CPUID (0x0d)
  x86, xsave: Introduce xstate enable functions
  x86, xsave: Separate fpu and xsave initialization
  x86, xsave: Move boot cpu initialization to xsave_init()
  x86, xsave: 32/64 bit boot cpu check unification in initialization
  x86, xsave: Do not include asm/i387.h in asm/xsave.h
  x86, xsave: Use xsaveopt in context-switch path when supported
  x86, xsave: Sync xsave memory layout with its header for user handling
  x86, xsave: Track the offset, size of state in the xsave layout

Merge branches 'x86-cleanups-for-linus', 'x86-vmware-for-linus', 'x86-mtrr-for-linus', 'x86-apic-for-linus', 'x86-fpu-for-linus' and 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-08-06T23:22:59+00:00

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Clean up arch/x86/kernel/cpu/mtrr/cleanup.c: use ";" not "," to terminate statements

* 'x86-vmware-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, vmware: Preset lpj values when on VMware.

* 'x86-mtrr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, mtrr: Use stop machine context to rendezvous all the cpu's

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86/apic/es7000_32: Remove unused variable

* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Avoid unnecessary __clear_user() and xrstor in signal handling

* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, vdso: Unmap vdso pages

KVM: x86: XSAVE/XRSTOR live migration support

2010-08-01T07:46:37+00:00

This patch enable save/restore of xsave state.

Signed-off-by: Sheng Yang 
Signed-off-by: Marcelo Tosatti

x86: Export FPU API for KVM use

2010-08-01T07:35:48+00:00

Also add some constants.

Signed-off-by: Sheng Yang 
Signed-off-by: Avi Kivity

x86, xsave: Make init_xstate_buf static

2010-07-21T21:06:05+00:00

The pointer is only used in xsave.c. Making it static.

Signed-off-by: Robert Richter 
LKML-Reference: <1279731838-1522-5-git-send-email-robert.richter@amd.com>
Acked-by: Suresh Siddha 
Signed-off-by: H. Peter Anvin

x86, xsave: Check cpuid level for XSTATE_CPUID (0x0d)

2010-07-21T21:06:04+00:00

The patch introduces the XSTATE_CPUID macro and adds a check that
tests if XSTATE_CPUID exists.

Signed-off-by: Robert Richter 
LKML-Reference: <1279731838-1522-4-git-send-email-robert.richter@amd.com>
Acked-by: Suresh Siddha 
Signed-off-by: H. Peter Anvin

x86, xsave: Separate fpu and xsave initialization

2010-07-21T21:06:04+00:00

As xsave also supports other than fpu features, it should be
initialized independently of the fpu. This patch moves this out of fpu
initialization.

There is also a lot of cross referencing between fpu and xsave
code. This patch reduces this by making xsave_cntxt_init() and
init_thread_xstate() static functions.

The patch moves the cpu_has_xsave check at the beginning of
xsave_init(). All other checks may removed then.

Signed-off-by: Robert Richter 
LKML-Reference: <1279731838-1522-2-git-send-email-robert.richter@amd.com>
Acked-by: Suresh Siddha 
Signed-off-by: H. Peter Anvin

x86, xsave: Do not include asm/i387.h in asm/xsave.h

2010-07-20T23:21:38+00:00

There are no dependencies to asm/i387.h. Instead, if including only
xsave.h the following error occurs:

 .../arch/x86/include/asm/i387.h:110: error: ‘XSTATE_FP’ undeclared (first use in this function)
 .../arch/x86/include/asm/i387.h:110: error: (Each undeclared identifier is reported only once
 .../arch/x86/include/asm/i387.h:110: error: for each function it appears in.)

This patch fixes this.

Signed-off-by: Robert Richter 
LKML-Reference: <1279651857-24639-2-git-send-email-robert.richter@amd.com>
Acked-by: Suresh Siddha 
Signed-off-by: H. Peter Anvin

x86, xsave: Use xsaveopt in context-switch path when supported

2010-07-20T00:52:24+00:00

xsaveopt is a more optimized form of xsave specifically designed
for the context switch usage. xsaveopt doesn't save the state that's not
modified from the prior xrstor. And if a specific feature state gets
modified to the init state, then xsaveopt just updates the header bit
in the xsave memory layout without updating the corresponding memory
layout.

Signed-off-by: Suresh Siddha 
LKML-Reference: <20100719230205.604014179@sbs-t61.sc.intel.com>
Signed-off-by: H. Peter Anvin

x86, xsave: Sync xsave memory layout with its header for user handling

2010-07-20T00:51:30+00:00

With xsaveopt, if a processor implementation discern that a processor state
component is in its initialized state it may modify the corresponding bit in
the xsave_hdr.xstate_bv as '0', with out modifying the corresponding memory
layout. Hence wHile presenting the xstate information to the user, we always
ensure that the memory layout of a feature will be in the init state if the
corresponding header bit is zero. This ensures the consistency and avoids the
condition of the user seeing some some stale state in the memory layout during
signal handling, debugging etc.

Signed-off-by: Suresh Siddha 
LKML-Reference: <20100719230205.351459480@sbs-t61.sc.intel.com>
Signed-off-by: H. Peter Anvin