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| author | cl349@firebug.cl.cam.ac.uk <cl349@firebug.cl.cam.ac.uk> | 2005-05-11 20:20:57 +0000 |
|---|---|---|
| committer | cl349@firebug.cl.cam.ac.uk <cl349@firebug.cl.cam.ac.uk> | 2005-05-11 20:20:57 +0000 |
| commit | 475943e46a9123a544bd5755d20677eb92ea37f1 (patch) | |
| tree | fbb0997db9f0a21f158b5ce257125a54160e204c /xen/include/asm-x86/i387.h | |
| parent | 9d2218f4877423a1a132da4f2563614c681bdaa8 (diff) | |
| download | xen-475943e46a9123a544bd5755d20677eb92ea37f1.tar.gz xen-475943e46a9123a544bd5755d20677eb92ea37f1.tar.bz2 xen-475943e46a9123a544bd5755d20677eb92ea37f1.zip | |
bitkeeper revision 1.1389.15.17 (42826929NzXOK9PSr4_HoDheSjVx3A)
vmx.h, i387.h, vmx_vmcs.c, vmx_io.c, vmx.c, traps.c:
Implement a eager save/lazy restore algorithm for dealing with the
FP state of a VMX guest.
Signed-off-by: Xin B Li <xin.b.li@intel.com>
Signed-off-by: Asit Mallick <asit.k.mallick@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Diffstat (limited to 'xen/include/asm-x86/i387.h')
| -rw-r--r-- | xen/include/asm-x86/i387.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/xen/include/asm-x86/i387.h b/xen/include/asm-x86/i387.h index ca81778089..01039ab648 100644 --- a/xen/include/asm-x86/i387.h +++ b/xen/include/asm-x86/i387.h @@ -28,4 +28,16 @@ extern void restore_fpu(struct exec_domain *tsk); __asm__ __volatile__ ( "ldmxcsr %0" : : "m" (__mxcsr) ); \ } while ( 0 ) +/* Make domain the FPU owner */ +static inline void setup_fpu(struct exec_domain *ed) +{ + if ( !test_and_set_bit(EDF_USEDFPU, &ed->flags) ) + { + if ( test_bit(EDF_DONEFPUINIT, &ed->flags) ) + restore_fpu(ed); + else + init_fpu(); + } +} + #endif /* __ASM_I386_I387_H */ |