/*
* Apply patch if appropriate, return length of new instruction
* sequence. The callee does nop padding for us.
*/
static unsigned vmi_patch(u8 type, u16 clobbers, void *insns,
unsigned long ip, unsigned len)
{
switch (type) {
case PARAVIRT_PATCH(pv_irq_ops.irq_disable):
return patch_internal(VMI_CALL_DisableInterrupts, len,
insns, ip);
case PARAVIRT_PATCH(pv_irq_ops.irq_enable):
return patch_internal(VMI_CALL_EnableInterrupts, len,
insns, ip);
case PARAVIRT_PATCH(pv_irq_ops.restore_fl):
return patch_internal(VMI_CALL_SetInterruptMask, len,
insns, ip);
case PARAVIRT_PATCH(pv_irq_ops.save_fl):
return patch_internal(VMI_CALL_GetInterruptMask, len,
insns, ip);
case PARAVIRT_PATCH(pv_cpu_ops.iret):
return patch_internal(VMI_CALL_IRET, len, insns, ip);
case PARAVIRT_PATCH(pv_cpu_ops.nmi_return):
return patch_internal(VMI_CALL_IRET, len, insns, ip);
case PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit):
return patch_internal(VMI_CALL_SYSEXIT, len, insns, ip);
default:
break;
}
return len;
}
/*
* Apply patch if appropriate, return length of new instruction
* sequence. The callee does nop padding for us.
*/
static unsigned vmi_patch(u8 type, u16 clobbers, void *insns, unsigned len)
{
switch (type) {
case PARAVIRT_IRQ_DISABLE:
return patch_internal(VMI_CALL_DisableInterrupts, len, insns);
case PARAVIRT_IRQ_ENABLE:
return patch_internal(VMI_CALL_EnableInterrupts, len, insns);
case PARAVIRT_RESTORE_FLAGS:
return patch_internal(VMI_CALL_SetInterruptMask, len, insns);
case PARAVIRT_SAVE_FLAGS:
return patch_internal(VMI_CALL_GetInterruptMask, len, insns);
case PARAVIRT_SAVE_FLAGS_IRQ_DISABLE:
if (len >= 10) {
patch_internal(VMI_CALL_GetInterruptMask, len, insns);
patch_internal(VMI_CALL_DisableInterrupts, len-5, insns+5);
return 10;
} else {
/*
* You bastards didn't leave enough room to
* patch save_flags_irq_disable inline. Patch
* to a helper
*/
BUG_ON(len < 5);
*(char *)insns = MNEM_CALL;
patch_offset(insns, irq_save_disable_callout);
return 5;
}
case PARAVIRT_INTERRUPT_RETURN:
return patch_internal(VMI_CALL_IRET, len, insns);
case PARAVIRT_STI_SYSEXIT:
return patch_internal(VMI_CALL_SYSEXIT, len, insns);
default:
break;
}
return len;
}
