[Xen-changelog] Add floating-point save/restore support on domain switch

[BitKeeper Bot <riel@xxxxxxxxxxx>]

ChangeSet 1.1668.1.8, 2005/06/09 14:48:45-06:00, djm@xxxxxxxxxxxxxxx

        Add floating-point save/restore support on domain switch
        Signed-off by: Dan Magenheimer <dan.magenheimer@xxxxxx>



 arch/ia64/domain.c           |    1 +
 arch/ia64/xensetup.c         |    3 +++
 include/asm-ia64/xensystem.h |    2 ++
 3 files changed, 6 insertions(+)


diff -Nru a/xen/arch/ia64/domain.c b/xen/arch/ia64/domain.c
--- a/xen/arch/ia64/domain.c    2005-06-10 14:04:27 -04:00
+++ b/xen/arch/ia64/domain.c    2005-06-10 14:04:27 -04:00
@@ -406,6 +406,7 @@
 printk("new_thread, done with dom_fw_setup\n");
        // don't forget to set this!
        v->vcpu_info->arch.banknum = 1;
+       memset(v->arch._thread.fph,0,sizeof(struct ia64_fpreg)*96);
 }
 #endif // CONFIG_VTI
 
diff -Nru a/xen/arch/ia64/xensetup.c b/xen/arch/ia64/xensetup.c
--- a/xen/arch/ia64/xensetup.c  2005-06-10 14:04:27 -04:00
+++ b/xen/arch/ia64/xensetup.c  2005-06-10 14:04:27 -04:00
@@ -218,6 +218,9 @@
 
     init_frametable();
 
+    ia64_fph_enable();
+    __ia64_init_fpu();
+
     alloc_dom0();
 #ifdef DOMU_BUILD_STAGING
     alloc_domU_staging();
diff -Nru a/xen/include/asm-ia64/xensystem.h b/xen/include/asm-ia64/xensystem.h
--- a/xen/include/asm-ia64/xensystem.h  2005-06-10 14:04:27 -04:00
+++ b/xen/include/asm-ia64/xensystem.h  2005-06-10 14:04:27 -04:00
@@ -50,6 +50,8 @@
 } while (0)
 #else // CONFIG_VTI
 #define __switch_to(prev,next,last) do {                                       
                 \
+       ia64_save_fpu(prev->arch._thread.fph);                                  
                \
+       ia64_load_fpu(next->arch._thread.fph);                                  
                \
        if (IA64_HAS_EXTRA_STATE(prev))                                         
                 \
                ia64_save_extra(prev);                                          
                 \
        if (IA64_HAS_EXTRA_STATE(next))                                         
                 \

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