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kvmclock: use the updated system_timer_msr 

Fixes e2b6c17 (kvmclock: update system_time_msr address forcibly)
which makes a call to get the latest value of the address
stored in system_timer_msr, but then uses the old address anyway.

Signed-off-by: Jim Somerville <Jim.Somerville@windriver.com>
Message-Id: <59b67db0bd15a46ab47c3aa657c81a4c11f168ea.1506702472.git.Jim.Somerville@windriver.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jim Somerville 2017-09-29 12:00:19 -04:00 committed by Paolo Bonzini
parent 11748ba72e
commit 346b1215b1
1 changed files with 2 additions and 1 deletions
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3
hw/i386/kvm/clock.c
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@ -62,7 +62,7 @@ static uint64_t kvmclock_current_nsec(KVMClockState *s)
{ {
CPUState *cpu = first_cpu; CPUState *cpu = first_cpu;
CPUX86State *env = cpu->env_ptr; CPUX86State *env = cpu->env_ptr;
hwaddr kvmclock_struct_pa = env->system_time_msr & ~1ULL; hwaddr kvmclock_struct_pa;
uint64_t migration_tsc = env->tsc; uint64_t migration_tsc = env->tsc;
struct pvclock_vcpu_time_info time; struct pvclock_vcpu_time_info time;
uint64_t delta; uint64_t delta;
@ -77,6 +77,7 @@ static uint64_t kvmclock_current_nsec(KVMClockState *s)
return 0; return 0;
} }
kvmclock_struct_pa = env->system_time_msr & ~1ULL;
cpu_physical_memory_read(kvmclock_struct_pa, &time, sizeof(time)); cpu_physical_memory_read(kvmclock_struct_pa, &time, sizeof(time));
assert(time.tsc_timestamp <= migration_tsc); assert(time.tsc_timestamp <= migration_tsc);