1 files changed, 53 insertions, 5 deletions

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index fa412515af7..6a80d67c212 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -164,7 +164,6 @@ static void *get_call_destination(u8 type)
 {
         struct paravirt_patch_template tmpl = {
                 .pv_init_ops = pv_init_ops,
-                .pv_misc_ops = pv_misc_ops,
                 .pv_time_ops = pv_time_ops,
                 .pv_cpu_ops = pv_cpu_ops,
                 .pv_irq_ops = pv_irq_ops,
@@ -282,6 +281,49 @@ int paravirt_disable_iospace(void)
         return ret;
 }
 
+static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE;
+
+static inline void enter_lazy(enum paravirt_lazy_mode mode)
+{
+        BUG_ON(x86_read_percpu(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);
+        BUG_ON(preemptible());
+
+        x86_write_percpu(paravirt_lazy_mode, mode);
+}
+
+void paravirt_leave_lazy(enum paravirt_lazy_mode mode)
+{
+        BUG_ON(x86_read_percpu(paravirt_lazy_mode) != mode);
+        BUG_ON(preemptible());
+
+        x86_write_percpu(paravirt_lazy_mode, PARAVIRT_LAZY_NONE);
+}
+
+void paravirt_enter_lazy_mmu(void)
+{
+        enter_lazy(PARAVIRT_LAZY_MMU);
+}
+
+void paravirt_leave_lazy_mmu(void)
+{
+        paravirt_leave_lazy(PARAVIRT_LAZY_MMU);
+}
+
+void paravirt_enter_lazy_cpu(void)
+{
+        enter_lazy(PARAVIRT_LAZY_CPU);
+}
+
+void paravirt_leave_lazy_cpu(void)
+{
+        paravirt_leave_lazy(PARAVIRT_LAZY_CPU);
+}
+
+enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
+{
+        return x86_read_percpu(paravirt_lazy_mode);
+}
+
 struct pv_info pv_info = {
         .name = "bare hardware",
         .paravirt_enabled = 0,
@@ -347,6 +389,11 @@ struct pv_cpu_ops pv_cpu_ops = {
 
         .set_iopl_mask = native_set_iopl_mask,
         .io_delay = native_io_delay,
+
+        .lazy_mode = {
+                .enter = paravirt_nop,
+                .leave = paravirt_nop,
+        },
 };
 
 struct pv_apic_ops pv_apic_ops = {
@@ -360,10 +407,6 @@ struct pv_apic_ops pv_apic_ops = {
 #endif
 };
 
-struct pv_misc_ops pv_misc_ops = {
-        .set_lazy_mode = paravirt_nop,
-};
-
 struct pv_mmu_ops pv_mmu_ops = {
         .pagetable_setup_start = native_pagetable_setup_start,
         .pagetable_setup_done = native_pagetable_setup_done,
@@ -414,6 +457,11 @@ struct pv_mmu_ops pv_mmu_ops = {
         .dup_mmap = paravirt_nop,
         .exit_mmap = paravirt_nop,
         .activate_mm = paravirt_nop,
+
+        .lazy_mode = {
+                .enter = paravirt_nop,
+                .leave = paravirt_nop,
+        },
 };
 
 EXPORT_SYMBOL_GPL(pv_time_ops);