xen/x86: don't lose event interrupts

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / x86 / xen / time.c

diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 3d88bfdf9e1c092a23e9d4be143630a074a92926..e3600eb618c1af3044454fe97f3d2d3eee547fbd 100644 (file)
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -36,9 +36,8 @@ static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate);
 /* snapshots of runstate info */
 static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate_snapshot);
 
-/* unused ns of stolen and blocked time */
+/* unused ns of stolen time */
 static DEFINE_PER_CPU(u64, xen_residual_stolen);
-static DEFINE_PER_CPU(u64, xen_residual_blocked);
 
 /* return an consistent snapshot of 64-bit time/counter value */
 static u64 get64(const u64 *p)
@@ -115,7 +114,7 @@ static void do_stolen_accounting(void)
 {
        struct vcpu_runstate_info state;
        struct vcpu_runstate_info *snap;
-       s64 blocked, runnable, offline, stolen;
+       s64 runnable, offline, stolen;
        cputime_t ticks;
 
        get_runstate_snapshot(&state);
@@ -125,7 +124,6 @@ static void do_stolen_accounting(void)
        snap = &__get_cpu_var(xen_runstate_snapshot);
 
        /* work out how much time the VCPU has not been runn*ing*  */
-       blocked = state.time[RUNSTATE_blocked] - snap->time[RUNSTATE_blocked];
        runnable = state.time[RUNSTATE_runnable] - snap->time[RUNSTATE_runnable];
        offline = state.time[RUNSTATE_offline] - snap->time[RUNSTATE_offline];
 
@@ -141,17 +139,6 @@ static void do_stolen_accounting(void)
        ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen);
        __this_cpu_write(xen_residual_stolen, stolen);
        account_steal_ticks(ticks);
-
-       /* Add the appropriate number of ticks of blocked time,
-          including any left-overs from last time. */
-       blocked += __this_cpu_read(xen_residual_blocked);
-
-       if (blocked < 0)
-               blocked = 0;
-
-       ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked);
-       __this_cpu_write(xen_residual_blocked, blocked);
-       account_idle_ticks(ticks);
 }
 
 /* Get the TSC speed from Xen */
@@ -351,11 +338,11 @@ static int xen_vcpuop_set_next_event(unsigned long delta,
        WARN_ON(evt->mode != CLOCK_EVT_MODE_ONESHOT);
 
        single.timeout_abs_ns = get_abs_timeout(delta);
-       single.flags = VCPU_SSHOTTMR_future;
+       /* Get an event anyway, even if the timeout is already expired */
+       single.flags = 0;
 
        ret = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, cpu, &single);
-
-       BUG_ON(ret != 0 && ret != -ETIME);
+       BUG_ON(ret != 0);
 
        return ret;
 }