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[Qemu-devel] [PATCH v2] vmgenid-test: use boot-sector infrastructure

Michael S. Tsirkin posted 1 patch 6 years, 9 months ago
Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/1500046217-24597-1-git-send-email-mst@redhat.com
Test FreeBSD passed
Test checkpatch passed
Test docker passed
Test s390x passed
tests/vmgenid-test.c   | 46 ++++++++++++++++++++++++++++++----------------
tests/Makefile.include |  2 +-
2 files changed, 31 insertions(+), 17 deletions(-)
[Qemu-devel] [PATCH v2] vmgenid-test: use boot-sector infrastructure
Posted by Michael S. Tsirkin 6 years, 9 months ago 
There's no requirement for RSDP to be installed last
by the firmware, so in rare cases vmgen id test hits
a race: RSDP is there but VM GEN ID isn't.

To fix, switch to common boot sector infrastructure.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Ben Warren <ben@skyportsystems.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

Changes from v1
    fix coding style violation reported by Peter

 tests/vmgenid-test.c   | 46 ++++++++++++++++++++++++++++++----------------
 tests/Makefile.include |  2 +-
 2 files changed, 31 insertions(+), 17 deletions(-)

diff --git a/tests/vmgenid-test.c b/tests/vmgenid-test.c
index e7ba38c..a49de92 100644
--- a/tests/vmgenid-test.c
+++ b/tests/vmgenid-test.c
@@ -15,6 +15,7 @@
 #include "qemu/bitmap.h"
 #include "qemu/uuid.h"
 #include "hw/acpi/acpi-defs.h"
+#include "boot-sector.h"
 #include "acpi-utils.h"
 #include "libqtest.h"
 
@@ -23,8 +24,6 @@
                                   * OVMF SDT Header Probe Supressor
                                   */
 #define RSDP_ADDR_INVALID 0x100000 /* RSDP must be below this address */
-#define RSDP_SLEEP_US     100000   /* Sleep for 100ms between tries */
-#define RSDP_TRIES_MAX    100      /* Max total time is 10 seconds */
 
 typedef struct {
     AcpiTableHeader header;
@@ -47,14 +46,12 @@ static uint32_t acpi_find_vgia(void)
     VgidTable vgid_table;
     int i;
 
-    /* Tables may take a short time to be set up by the guest */
-    for (i = 0; i < RSDP_TRIES_MAX; i++) {
-        rsdp_offset = acpi_find_rsdp_address();
-        if (rsdp_offset < RSDP_ADDR_INVALID) {
-            break;
-        }
-        g_usleep(RSDP_SLEEP_US);
-    }
+    /* Wait for guest firmware to finish and start the payload. */
+    boot_sector_test();
+
+    /* Tables should be initialized now. */
+    rsdp_offset = acpi_find_rsdp_address();
+
     g_assert_cmphex(rsdp_offset, <, RSDP_ADDR_INVALID);
 
     acpi_parse_rsdp_table(rsdp_offset, &rsdp_table);
@@ -131,6 +128,18 @@ static void read_guid_from_monitor(QemuUUID *guid)
     QDECREF(rsp);
 }
 
+static char disk[] = "tests/vmgenid-test-disk-XXXXXX";
+
+static char *guid_cmd_strdup(const char *guid)
+{
+    return g_strdup_printf("-machine accel=tcg "
+                           "-device vmgenid,id=testvgid,guid=%s "
+                           "-drive id=hd0,if=none,file=%s,format=raw "
+                           "-device ide-hd,drive=hd0 ",
+                           guid, disk);
+}
+
+
 static void vmgenid_set_guid_test(void)
 {
     QemuUUID expected, measured;
@@ -138,8 +147,7 @@ static void vmgenid_set_guid_test(void)
 
     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
 
-    cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
-                          "guid=%s", VGID_GUID);
+    cmd = guid_cmd_strdup(VGID_GUID);
     qtest_start(cmd);
 
     /* Read the GUID from accessing guest memory */
@@ -152,10 +160,10 @@ static void vmgenid_set_guid_test(void)
 
 static void vmgenid_set_guid_auto_test(void)
 {
-    const char *cmd;
+    char *cmd;
     QemuUUID measured;
 
-    cmd = "-machine accel=tcg -device vmgenid,id=testvgid," "guid=auto";
+    cmd = guid_cmd_strdup("auto");
     qtest_start(cmd);
 
     read_guid_from_memory(&measured);
@@ -164,6 +172,7 @@ static void vmgenid_set_guid_auto_test(void)
     g_assert(!qemu_uuid_is_null(&measured));
 
     qtest_quit(global_qtest);
+    g_free(cmd);
 }
 
 static void vmgenid_query_monitor_test(void)
@@ -173,8 +182,7 @@ static void vmgenid_query_monitor_test(void)
 
     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
 
-    cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
-                          "guid=%s", VGID_GUID);
+    cmd = guid_cmd_strdup(VGID_GUID);
     qtest_start(cmd);
 
     /* Read the GUID via the monitor */
@@ -189,6 +197,11 @@ int main(int argc, char **argv)
 {
     int ret;
 
+    ret = boot_sector_init(disk);
+    if (ret) {
+        return ret;
+    }
+
     g_test_init(&argc, &argv, NULL);
 
     qtest_add_func("/vmgenid/vmgenid/set-guid",
@@ -198,6 +211,7 @@ int main(int argc, char **argv)
     qtest_add_func("/vmgenid/vmgenid/query-monitor",
                    vmgenid_query_monitor_test);
     ret = g_test_run();
+    boot_sector_cleanup(disk);
 
     return ret;
 }
diff --git a/tests/Makefile.include b/tests/Makefile.include
index 18cd06a..aef374b 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -761,7 +761,7 @@ tests/test-uuid$(EXESUF): tests/test-uuid.o $(test-util-obj-y)
 tests/test-arm-mptimer$(EXESUF): tests/test-arm-mptimer.o
 tests/test-qapi-util$(EXESUF): tests/test-qapi-util.o $(test-util-obj-y)
 tests/numa-test$(EXESUF): tests/numa-test.o
-tests/vmgenid-test$(EXESUF): tests/vmgenid-test.o tests/acpi-utils.o
+tests/vmgenid-test$(EXESUF): tests/vmgenid-test.o tests/boot-sector.o tests/acpi-utils.o
 
 tests/migration/stress$(EXESUF): tests/migration/stress.o
 	$(call quiet-command, $(LINKPROG) -static -O3 $(PTHREAD_LIB) -o $@ $< ,"LINK","$(TARGET_DIR)$@")
-- 
MST
Re: [Qemu-devel] [PATCH v2] vmgenid-test: use boot-sector infrastructure
Posted by Ben Warren via Qemu-devel 6 years, 9 months ago 
Hi Michael,

Looks good.  Thanks for taking care of this.
> On Jul 14, 2017, at 8:30 AM, Michael S. Tsirkin <mst@redhat.com> wrote:
> 
> There's no requirement for RSDP to be installed last
> by the firmware, so in rare cases vmgen id test hits
> a race: RSDP is there but VM GEN ID isn't.
> 
> To fix, switch to common boot sector infrastructure.
> 
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: Ben Warren <ben@skyportsystems.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Ben Warren <ben@skyportsystems.com <mailto:ben@skyportsystems.com>>
> ---
> 
> Changes from v1
>    fix coding style violation reported by Peter
> 
> tests/vmgenid-test.c   | 46 ++++++++++++++++++++++++++++++----------------
> tests/Makefile.include |  2 +-
> 2 files changed, 31 insertions(+), 17 deletions(-)
> 
> diff --git a/tests/vmgenid-test.c b/tests/vmgenid-test.c
> index e7ba38c..a49de92 100644
> --- a/tests/vmgenid-test.c
> +++ b/tests/vmgenid-test.c
> @@ -15,6 +15,7 @@
> #include "qemu/bitmap.h"
> #include "qemu/uuid.h"
> #include "hw/acpi/acpi-defs.h"
> +#include "boot-sector.h"
> #include "acpi-utils.h"
> #include "libqtest.h"
> 
> @@ -23,8 +24,6 @@
>                                   * OVMF SDT Header Probe Supressor
>                                   */
> #define RSDP_ADDR_INVALID 0x100000 /* RSDP must be below this address */
> -#define RSDP_SLEEP_US     100000   /* Sleep for 100ms between tries */
> -#define RSDP_TRIES_MAX    100      /* Max total time is 10 seconds */
> 
> typedef struct {
>     AcpiTableHeader header;
> @@ -47,14 +46,12 @@ static uint32_t acpi_find_vgia(void)
>     VgidTable vgid_table;
>     int i;
> 
> -    /* Tables may take a short time to be set up by the guest */
> -    for (i = 0; i < RSDP_TRIES_MAX; i++) {
> -        rsdp_offset = acpi_find_rsdp_address();
> -        if (rsdp_offset < RSDP_ADDR_INVALID) {
> -            break;
> -        }
> -        g_usleep(RSDP_SLEEP_US);
> -    }
> +    /* Wait for guest firmware to finish and start the payload. */
> +    boot_sector_test();
> +
> +    /* Tables should be initialized now. */
> +    rsdp_offset = acpi_find_rsdp_address();
> +
>     g_assert_cmphex(rsdp_offset, <, RSDP_ADDR_INVALID);
> 
>     acpi_parse_rsdp_table(rsdp_offset, &rsdp_table);
> @@ -131,6 +128,18 @@ static void read_guid_from_monitor(QemuUUID *guid)
>     QDECREF(rsp);
> }
> 
> +static char disk[] = "tests/vmgenid-test-disk-XXXXXX";
> +
> +static char *guid_cmd_strdup(const char *guid)
> +{
> +    return g_strdup_printf("-machine accel=tcg "
> +                           "-device vmgenid,id=testvgid,guid=%s "
> +                           "-drive id=hd0,if=none,file=%s,format=raw "
> +                           "-device ide-hd,drive=hd0 ",
> +                           guid, disk);
> +}
> +
> +
> static void vmgenid_set_guid_test(void)
> {
>     QemuUUID expected, measured;
> @@ -138,8 +147,7 @@ static void vmgenid_set_guid_test(void)
> 
>     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
> 
> -    cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
> -                          "guid=%s", VGID_GUID);
> +    cmd = guid_cmd_strdup(VGID_GUID);
>     qtest_start(cmd);
> 
>     /* Read the GUID from accessing guest memory */
> @@ -152,10 +160,10 @@ static void vmgenid_set_guid_test(void)
> 
> static void vmgenid_set_guid_auto_test(void)
> {
> -    const char *cmd;
> +    char *cmd;
>     QemuUUID measured;
> 
> -    cmd = "-machine accel=tcg -device vmgenid,id=testvgid," "guid=auto";
> +    cmd = guid_cmd_strdup("auto");
>     qtest_start(cmd);
> 
>     read_guid_from_memory(&measured);
> @@ -164,6 +172,7 @@ static void vmgenid_set_guid_auto_test(void)
>     g_assert(!qemu_uuid_is_null(&measured));
> 
>     qtest_quit(global_qtest);
> +    g_free(cmd);
> }
> 
> static void vmgenid_query_monitor_test(void)
> @@ -173,8 +182,7 @@ static void vmgenid_query_monitor_test(void)
> 
>     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
> 
> -    cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
> -                          "guid=%s", VGID_GUID);
> +    cmd = guid_cmd_strdup(VGID_GUID);
>     qtest_start(cmd);
> 
>     /* Read the GUID via the monitor */
> @@ -189,6 +197,11 @@ int main(int argc, char **argv)
> {
>     int ret;
> 
> +    ret = boot_sector_init(disk);
> +    if (ret) {
> +        return ret;
> +    }
> +
>     g_test_init(&argc, &argv, NULL);
> 
>     qtest_add_func("/vmgenid/vmgenid/set-guid",
> @@ -198,6 +211,7 @@ int main(int argc, char **argv)
>     qtest_add_func("/vmgenid/vmgenid/query-monitor",
>                    vmgenid_query_monitor_test);
>     ret = g_test_run();
> +    boot_sector_cleanup(disk);
> 
>     return ret;
> }
> diff --git a/tests/Makefile.include b/tests/Makefile.include
> index 18cd06a..aef374b 100644
> --- a/tests/Makefile.include
> +++ b/tests/Makefile.include
> @@ -761,7 +761,7 @@ tests/test-uuid$(EXESUF): tests/test-uuid.o $(test-util-obj-y)
> tests/test-arm-mptimer$(EXESUF): tests/test-arm-mptimer.o
> tests/test-qapi-util$(EXESUF): tests/test-qapi-util.o $(test-util-obj-y)
> tests/numa-test$(EXESUF): tests/numa-test.o
> -tests/vmgenid-test$(EXESUF): tests/vmgenid-test.o tests/acpi-utils.o
> +tests/vmgenid-test$(EXESUF): tests/vmgenid-test.o tests/boot-sector.o tests/acpi-utils.o
> 
> tests/migration/stress$(EXESUF): tests/migration/stress.o
> 	$(call quiet-command, $(LINKPROG) -static -O3 $(PTHREAD_LIB) -o $@ $< ,"LINK","$(TARGET_DIR)$@")
> -- 
> MST
Re: [Qemu-devel] [PATCH v2] vmgenid-test: use boot-sector infrastructure
Posted by Peter Maydell 6 years, 9 months ago 
On 14 July 2017 at 16:49, Ben Warren <ben@skyportsystems.com> wrote:
> Hi Michael,
>
> Looks good.  Thanks for taking care of this.
>
> On Jul 14, 2017, at 8:30 AM, Michael S. Tsirkin <mst@redhat.com> wrote:
>
> There's no requirement for RSDP to be installed last
> by the firmware, so in rare cases vmgen id test hits
> a race: RSDP is there but VM GEN ID isn't.
>
> To fix, switch to common boot sector infrastructure.
>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: Ben Warren <ben@skyportsystems.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
>
> Reviewed-by: Ben Warren <ben@skyportsystems.com>

Thanks; applied to master as a buildfix.

-- PMM

Patchew 2.1-devel-0870f84

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