Displaying 1 result from an estimated 1 matches for "hypervisor_multicall_check".
2012 Jun 29
0
[PATCH] linux-2.6.18/x86: improve CR0 read/write handling
...desc_struct *)alloc_bootmem_pages(PAGE_SIZE);
/* alloc_bootmem_pages panics on failure, so no check */
--- a/arch/i386/kernel/process-xen.c
+++ b/arch/i386/kernel/process-xen.c
@@ -641,6 +641,8 @@ struct task_struct fastcall * __switch_t
BUG_ON(mcl > _mcl + ARRAY_SIZE(_mcl));
if (unlikely(HYPERVISOR_multicall_check(_mcl, mcl - _mcl, NULL)))
BUG();
+ if (_mcl->op == __HYPERVISOR_fpu_taskswitch)
+ __get_cpu_var(xen_x86_cr0) |= X86_CR0_TS;
/*
* Restore %fs and %gs if needed.
--- a/arch/i386/kernel/traps-xen.c
+++ b/arch/i386/kernel/traps-xen.c
@@ -1057,6 +1057,7 @@ asmlinkage void math_state_restor...