From 9b1786829aefb83f37a8f3135e3ea91c56001b56 Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Tue, 3 Jun 2014 13:34:48 -0300 Subject: [PATCH] kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Ensure proper env->tsc value for kvmclock_current_nsec calculation. Reported-by: Marcin GibuĊ‚a Cc: qemu-stable@nongnu.org Signed-off-by: Marcelo Tosatti Signed-off-by: Paolo Bonzini --- hw/i386/kvm/clock.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/i386/kvm/clock.c b/hw/i386/kvm/clock.c index 6f4ed28ad4..bef2504389 100644 --- a/hw/i386/kvm/clock.c +++ b/hw/i386/kvm/clock.c @@ -17,6 +17,7 @@ #include "qemu/host-utils.h" #include "sysemu/sysemu.h" #include "sysemu/kvm.h" +#include "sysemu/cpus.h" #include "hw/sysbus.h" #include "hw/kvm/clock.h" @@ -65,6 +66,7 @@ static uint64_t kvmclock_current_nsec(KVMClockState *s) cpu_physical_memory_read(kvmclock_struct_pa, &time, sizeof(time)); + assert(time.tsc_timestamp <= migration_tsc); delta = migration_tsc - time.tsc_timestamp; if (time.tsc_shift < 0) { delta >>= -time.tsc_shift; @@ -123,6 +125,8 @@ static void kvmclock_vm_state_change(void *opaque, int running, if (s->clock_valid) { return; } + + cpu_synchronize_all_states(); ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data); if (ret < 0) { fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret));