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ivshmem-test: Clean up wait for devices to become operational 

test_ivshmem_server() waits until the first byte in BAR 2 contains the
0x42 we put into shared memory.  Works because the byte reads zero
until the device maps the shared memory gotten from the server.

Check the IVPosition register instead: it's initially -1, and becomes
non-negative right when the device maps the share memory, so no
change, just cleaner, because it's what guest software is supposed to
do.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1458066895-20632-9-git-send-email-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2016-03-15 19:34:23 +01:00
parent 4958fe5d3c
commit 14c5d49ab3
1 changed files with 4 additions and 6 deletions
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10
tests/ivshmem-test.c
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@ -301,7 +301,6 @@ static void test_ivshmem_server(bool msi)
int nvectors = 2;
guint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
memset(tmpshmem, 0x42, TMPSHMSIZE);
ret = ivshmem_server_init(&server, tmpserver, tmpshm, true,
TMPSHMSIZE, nvectors,
g_test_verbose());
@ -315,9 +314,9 @@ static void test_ivshmem_server(bool msi)
setup_vm_with_server(&state2, nvectors, msi);
s2 = &state2;
/* check state before server sends stuff */
g_assert_cmpuint(in_reg(s1, IVPOSITION), ==, 0xffffffff);
g_assert_cmpuint(in_reg(s2, IVPOSITION), ==, 0xffffffff);
g_assert_cmpuint(qtest_readb(s1->qtest, (uintptr_t)s1->mem_base), ==, 0x00);
thread.server = &server;
@ -326,12 +325,11 @@ static void test_ivshmem_server(bool msi)
thread.thread = g_thread_new("ivshmem-server", server_thread, &thread);
g_assert(thread.thread != NULL);
/* waiting until mapping is done */
/* waiting for devices to become operational */
while (g_get_monotonic_time() < end_time) {
g_usleep(1000);
if (qtest_readb(s1->qtest, (uintptr_t)s1->mem_base) == 0x42 &&
qtest_readb(s2->qtest, (uintptr_t)s2->mem_base) == 0x42) {
if ((int)in_reg(s1, IVPOSITION) >= 0 &&
(int)in_reg(s2, IVPOSITION) >= 0) {
break;
}
}