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[Qemu-devel] [PATCH] tests: add pxe e1000 test


From: Victor Kaplansky
Subject: [Qemu-devel] [PATCH] tests: add pxe e1000 test
Date: Sun, 14 Feb 2016 14:10:17 +0200

The test is based on bios-tables-test.c.  It creates a file with
a boot sector image and loads it into a guest using PXE and TFTP
functionality.

Cc: Jason Wang <address@hidden>
Signed-off-by: Victor Kaplansky <address@hidden>
Suggested-by: Michael S. Tsirkin <address@hidden>
---
 tests/pxe-test.c | 141 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/Makefile   |   2 +
 2 files changed, 143 insertions(+)
 create mode 100644 tests/pxe-test.c

diff --git a/tests/pxe-test.c b/tests/pxe-test.c
new file mode 100644
index 00000000..3a45698d
--- /dev/null
+++ b/tests/pxe-test.c
@@ -0,0 +1,141 @@
+/*
+ * PXE test cases.
+ *
+ * Copyright (c) 2013 Red Hat Inc.
+ *
+ * Authors:
+ *  Michael S. Tsirkin <address@hidden>,
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <glib.h>
+#include <glib/gstdio.h>
+#include "qemu-common.h"
+#include "libqtest.h"
+
+#define LOW(x) ((x) & 0xff)
+#define HIGH(x) ((x) >> 8)
+
+#define SIGNATURE 0xdead
+#define SIGNATURE_OFFSET 0x10
+#define BOOT_SECTOR_ADDRESS 0x7c00
+#define NETNAME "net0"
+
+/* Boot sector code: write SIGNATURE into memory,
+ * then halt.
+ * Q35 machine requires a minimum 0x7e000 bytes disk.
+ * (bug or feature?)
+ */
+static uint8_t boot_sector[0x7e000] = {
+    /* The first sector will be placed at RAM address 00007C00, and
+     * the BIOS transfers control to 00007C00
+     */
+
+    /* Data Segment register should be initialized, since pxe
+     * boot loader can leave it dirty.
+     */
+
+    /* 7c00: move $0000,%ax */
+    [0x00] = 0xb8,
+    [0x01] = 0x00,
+    [0x02] = 0x00,
+    /* 7c03: move %ax,%ds */
+    [0x03] = 0x8e,
+    [0x04] = 0xd8,
+
+    /* 7c05: mov $0xdead,%ax */
+    [0x05] = 0xb8,
+    [0x06] = LOW(SIGNATURE),
+    [0x07] = HIGH(SIGNATURE),
+    /* 7c08:  mov %ax,0x7c10 */
+    [0x08] = 0xa3,
+    [0x09] = LOW(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET),
+    [0x0a] = HIGH(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET),
+
+    /* 7c0b cli */
+    [0x0b] = 0xfa,
+    /* 7c0c: hlt */
+    [0x0c] = 0xf4,
+    /* 7c0e: jmp 0x7c07=0x7c0f-3 */
+    [0x0d] = 0xeb,
+    [0x0e] = LOW(-3),
+    /* We mov 0xdead here: set value to make debugging easier */
+    [SIGNATURE_OFFSET] = LOW(0xface),
+    [SIGNATURE_OFFSET + 1] = HIGH(0xface),
+    /* End of boot sector marker */
+    [0x1FE] = 0x55,
+    [0x1FF] = 0xAA,
+};
+
+static const char *disk = "tests/pxe-test-disk.raw";
+
+static void test_pxe_e1000_one(const char *params)
+{
+    char *args;
+    uint8_t signature_low;
+    uint8_t signature_high;
+    uint16_t signature;
+    int i;
+
+    args = g_strdup_printf("-machine accel=tcg "
+                           "-netdev user,id=" NETNAME ",tftp=./,bootfile=%s "
+                           "%s ",
+                           disk, params);
+
+    qtest_start(args);
+
+   /* Wait at most 1 minute */
+#define TEST_DELAY (1 * G_USEC_PER_SEC / 10)
+#define TEST_CYCLES MAX((60 * G_USEC_PER_SEC / TEST_DELAY), 1)
+
+    /* Poll until code has run and modified memory.  Once it has we know BIOS
+     * initialization is done.  TODO: check that IP reached the halt
+     * instruction.
+     */
+    for (i = 0; i < TEST_CYCLES; ++i) {
+        signature_low = readb(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET);
+        signature_high = readb(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET + 1);
+        signature = (signature_high << 8) | signature_low;
+        if (signature == SIGNATURE) {
+            break;
+        }
+        g_usleep(TEST_DELAY);
+    }
+
+    g_assert_cmphex(signature, ==, SIGNATURE);
+
+    qtest_quit(global_qtest);
+    g_free(args);
+}
+
+static void test_pxe_e1000(void)
+{
+    test_pxe_e1000_one("-device virtio-net-pci,netdev=" NETNAME);
+}
+
+int main(int argc, char *argv[])
+{
+    const char *arch = qtest_get_arch();
+    FILE *f = fopen(disk, "w");
+    int ret;
+
+    if (!f) {
+        fprintf(stderr, "Couldn't open \"%s\": %s", disk, strerror(errno));
+        return 1;
+    }
+    fwrite(boot_sector, 1, sizeof boot_sector, f);
+    fclose(f);
+
+    g_test_init(&argc, &argv, NULL);
+
+    if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
+        qtest_add_func("pxe/e1000", test_pxe_e1000);
+    }
+    ret = g_test_run();
+    unlink(disk);
+    return ret;
+}
diff --git a/tests/Makefile b/tests/Makefile
index 650e654e..2de51e4d 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -173,6 +173,7 @@ check-qtest-i386-y += tests/hd-geo-test$(EXESUF)
 gcov-files-i386-y += hw/block/hd-geometry.c
 check-qtest-i386-y += tests/boot-order-test$(EXESUF)
 check-qtest-i386-y += tests/bios-tables-test$(EXESUF)
+check-qtest-i386-y += tests/pxe-test$(EXESUF)
 check-qtest-i386-y += tests/rtc-test$(EXESUF)
 check-qtest-i386-y += tests/ipmi-kcs-test$(EXESUF)
 check-qtest-i386-y += tests/ipmi-bt-test$(EXESUF)
@@ -519,6 +520,7 @@ tests/ipmi-bt-test$(EXESUF): tests/ipmi-bt-test.o
 tests/hd-geo-test$(EXESUF): tests/hd-geo-test.o
 tests/boot-order-test$(EXESUF): tests/boot-order-test.o $(libqos-obj-y)
 tests/bios-tables-test$(EXESUF): tests/bios-tables-test.o $(libqos-obj-y)
+tests/pxe-test$(EXESUF): tests/pxe-test.o $(libqos-obj-y)
 tests/tmp105-test$(EXESUF): tests/tmp105-test.o $(libqos-omap-obj-y)
 tests/ds1338-test$(EXESUF): tests/ds1338-test.o $(libqos-imx-obj-y)
 tests/i440fx-test$(EXESUF): tests/i440fx-test.o $(libqos-pc-obj-y)
-- 
--Victor



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