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authorRichard Henderson <richard.henderson@linaro.org>2019-03-14 13:06:29 -0700
committerRichard Henderson <richard.henderson@linaro.org>2019-05-22 12:38:54 -0400
commit9c09a2518eac6277c09ee006841c94abe7305e53 (patch)
treefd63e4e66875cd1d0087b04cbfe1f8592abfcabd /cpus.c
parent8d8404f1564496f42b90497e7be635921c000e9d (diff)
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cpus: Initialize pseudo-random seeds for all guest cpus
When the -seed option is given, call qemu_guest_random_seed_main, putting the subsystem into deterministic mode. Pass derived seeds to each cpu created; which is a no-op unless the subsystem is in deterministic mode. Reviewed-by: Laurent Vivier <lvivier@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'cpus.c')
-rw-r--r--cpus.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/cpus.c b/cpus.c
index e58e7ab..ffc5711 100644
--- a/cpus.c
+++ b/cpus.c
@@ -50,6 +50,7 @@
#include "qemu/option.h"
#include "qemu/bitmap.h"
#include "qemu/seqlock.h"
+#include "qemu/guest-random.h"
#include "tcg.h"
#include "hw/nmi.h"
#include "sysemu/replay.h"
@@ -1276,6 +1277,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
/* signal CPU creation */
cpu->created = true;
qemu_cond_signal(&qemu_cpu_cond);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
if (cpu_can_run(cpu)) {
@@ -1319,6 +1321,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
/* signal CPU creation */
cpu->created = true;
qemu_cond_signal(&qemu_cpu_cond);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
qemu_mutex_unlock_iothread();
@@ -1478,6 +1481,7 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
cpu->created = true;
cpu->can_do_io = 1;
qemu_cond_signal(&qemu_cpu_cond);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
/* wait for initial kick-off after machine start */
while (first_cpu->stopped) {
@@ -1592,6 +1596,7 @@ static void *qemu_hax_cpu_thread_fn(void *arg)
hax_init_vcpu(cpu);
qemu_cond_signal(&qemu_cpu_cond);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
if (cpu_can_run(cpu)) {
@@ -1631,6 +1636,7 @@ static void *qemu_hvf_cpu_thread_fn(void *arg)
/* signal CPU creation */
cpu->created = true;
qemu_cond_signal(&qemu_cpu_cond);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
if (cpu_can_run(cpu)) {
@@ -1671,6 +1677,7 @@ static void *qemu_whpx_cpu_thread_fn(void *arg)
/* signal CPU creation */
cpu->created = true;
qemu_cond_signal(&qemu_cpu_cond);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
if (cpu_can_run(cpu)) {
@@ -1724,6 +1731,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
cpu->can_do_io = 1;
current_cpu = cpu;
qemu_cond_signal(&qemu_cpu_cond);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
/* process any pending work */
cpu->exit_request = 1;
@@ -2071,6 +2079,7 @@ void qemu_init_vcpu(CPUState *cpu)
cpu->nr_cores = smp_cores;
cpu->nr_threads = smp_threads;
cpu->stopped = true;
+ cpu->random_seed = qemu_guest_random_seed_thread_part1();
if (!cpu->as) {
/* If the target cpu hasn't set up any address spaces itself,