Only the pre_flush() / post_flush() section actually needs to run with
interrupts disabled.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/flushtlb.c
+++ b/xen/arch/x86/flushtlb.c
@@ -76,7 +76,13 @@ static void post_flush(u32 t)
static void do_tlb_flush(void)
{
- u32 t = pre_flush();
+ unsigned long flags;
+ u32 t;
+
+ /* This non-reentrant function is sometimes called in interrupt context. */
+ local_irq_save(flags);
+
+ t = pre_flush();
if ( use_invpcid )
invpcid_flush_all();
@@ -89,6 +95,8 @@ static void do_tlb_flush(void)
}
post_flush(t);
+
+ local_irq_restore(flags);
}
void switch_cr3_cr4(unsigned long cr3, unsigned long cr4)
@@ -147,10 +155,6 @@ void switch_cr3_cr4(unsigned long cr3, u
unsigned int flush_area_local(const void *va, unsigned int flags)
{
unsigned int order = (flags - 1) & FLUSH_ORDER_MASK;
- unsigned long irqfl;
-
- /* This non-reentrant function is sometimes called in interrupt context. */
- local_irq_save(irqfl);
if ( flags & (FLUSH_TLB|FLUSH_TLB_GLOBAL) )
{
@@ -218,8 +222,6 @@ unsigned int flush_area_local(const void
}
}
- local_irq_restore(irqfl);
-
if ( flags & FLUSH_ROOT_PGTBL )
get_cpu_info()->root_pgt_changed = true;
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
