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tests/qtest: ahci-test: add test exposing reset issue with pending callback 

Before commit "hw/ide: reset: cancel async DMA operation before
resetting state", this test would fail, because a reset with a
pending write operation would lead to an unsolicited write to the
first sector of the disk.

The test writes a pattern to the beginning of the disk and verifies
that it is still intact after a reset with a pending operation. It
also checks that the pending operation actually completes correctly.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Message-ID: <20230906130922.142845-2-f.ebner@proxmox.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
(cherry picked from commit cc610857bb)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Fiona Ebner 2023-09-06 15:09:22 +02:00 committed by Michael Tokarev
parent 60f7b60429
commit 07c2a9c0fa
1 changed files with 85 additions and 1 deletions
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86
tests/qtest/ahci-test.c
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@ -1424,6 +1424,89 @@ static void test_reset(void)
ahci_shutdown(ahci);
}
static void test_reset_pending_callback(void)
{
AHCIQState *ahci;
AHCICommand *cmd;
uint8_t port;
uint64_t ptr1;
uint64_t ptr2;
int bufsize = 4 * 1024;
int speed = bufsize + (bufsize / 2);
int offset1 = 0;
int offset2 = bufsize / AHCI_SECTOR_SIZE;
g_autofree unsigned char *tx1 = g_malloc(bufsize);
g_autofree unsigned char *tx2 = g_malloc(bufsize);
g_autofree unsigned char *rx1 = g_malloc0(bufsize);
g_autofree unsigned char *rx2 = g_malloc0(bufsize);
/* Uses throttling to make test independent of specific environment. */
ahci = ahci_boot_and_enable("-drive if=none,id=drive0,file=%s,"
"cache=writeback,format=%s,"
"throttling.bps-write=%d "
"-M q35 "
"-device ide-hd,drive=drive0 ",
tmp_path, imgfmt, speed);
port = ahci_port_select(ahci);
ahci_port_clear(ahci, port);
ptr1 = ahci_alloc(ahci, bufsize);
ptr2 = ahci_alloc(ahci, bufsize);
g_assert(ptr1 && ptr2);
/* Need two different patterns. */
do {
generate_pattern(tx1, bufsize, AHCI_SECTOR_SIZE);
generate_pattern(tx2, bufsize, AHCI_SECTOR_SIZE);
} while (memcmp(tx1, tx2, bufsize) == 0);
qtest_bufwrite(ahci->parent->qts, ptr1, tx1, bufsize);
qtest_bufwrite(ahci->parent->qts, ptr2, tx2, bufsize);
/* Write to beginning of disk to check it wasn't overwritten later. */
ahci_guest_io(ahci, port, CMD_WRITE_DMA_EXT, ptr1, bufsize, offset1);
/* Issue asynchronously to get a pending callback during reset. */
cmd = ahci_command_create(CMD_WRITE_DMA_EXT);
ahci_command_adjust(cmd, offset2, ptr2, bufsize, 0);
ahci_command_commit(ahci, cmd, port);
ahci_command_issue_async(ahci, cmd);
ahci_set(ahci, AHCI_GHC, AHCI_GHC_HR);
ahci_command_free(cmd);
/* Wait for throttled write to finish. */
sleep(1);
/* Start again. */
ahci_clean_mem(ahci);
ahci_pci_enable(ahci);
ahci_hba_enable(ahci);
port = ahci_port_select(ahci);
ahci_port_clear(ahci, port);
/* Read and verify. */
ahci_guest_io(ahci, port, CMD_READ_DMA_EXT, ptr1, bufsize, offset1);
qtest_bufread(ahci->parent->qts, ptr1, rx1, bufsize);
g_assert_cmphex(memcmp(tx1, rx1, bufsize), ==, 0);
ahci_guest_io(ahci, port, CMD_READ_DMA_EXT, ptr2, bufsize, offset2);
qtest_bufread(ahci->parent->qts, ptr2, rx2, bufsize);
g_assert_cmphex(memcmp(tx2, rx2, bufsize), ==, 0);
ahci_free(ahci, ptr1);
ahci_free(ahci, ptr2);
ahci_clean_mem(ahci);
ahci_shutdown(ahci);
}
static void test_ncq_simple(void)
{
AHCIQState *ahci;
@ -1945,7 +2028,8 @@ int main(int argc, char **argv)
qtest_add_func("/ahci/migrate/dma/halted", test_migrate_halted_dma);
qtest_add_func("/ahci/max", test_max);
qtest_add_func("/ahci/reset", test_reset);
qtest_add_func("/ahci/reset/simple", test_reset);
qtest_add_func("/ahci/reset/pending_callback", test_reset_pending_callback);
qtest_add_func("/ahci/io/ncq/simple", test_ncq_simple);
qtest_add_func("/ahci/migrate/ncq/simple", test_migrate_ncq);