acpi-test: basic acpi unit-test

We run bios, and boot a minimal boot sector that immediately halts.
Then poke at memory to find ACPI tables.

This only checks that RSDP is there.
More will be added later.

Cc: Andreas Färber <afaerber@suse.de>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

tests/Makefile

@@ -64,6 +64,7 @@ check-qtest-i386-y += tests/ide-test$(EXESUF)
 check-qtest-i386-y += tests/hd-geo-test$(EXESUF)
 gcov-files-i386-y += hw/hd-geometry.c
 check-qtest-i386-y += tests/boot-order-test$(EXESUF)
+check-qtest-i386-y += tests/acpi-test$(EXESUF)
 check-qtest-i386-y += tests/rtc-test$(EXESUF)
 check-qtest-i386-y += tests/i440fx-test$(EXESUF)
 check-qtest-i386-y += tests/fw_cfg-test$(EXESUF)
@@ -198,6 +199,7 @@ tests/fdc-test$(EXESUF): tests/fdc-test.o
 tests/ide-test$(EXESUF): tests/ide-test.o $(libqos-pc-obj-y)
 tests/hd-geo-test$(EXESUF): tests/hd-geo-test.o
 tests/boot-order-test$(EXESUF): tests/boot-order-test.o $(libqos-obj-y)
+tests/acpi-test$(EXESUF): tests/acpi-test.o $(libqos-obj-y)
 tests/tmp105-test$(EXESUF): tests/tmp105-test.o $(libqos-omap-obj-y)
 tests/i440fx-test$(EXESUF): tests/i440fx-test.o $(libqos-pc-obj-y)
 tests/fw_cfg-test$(EXESUF): tests/fw_cfg-test.o $(libqos-pc-obj-y)

tests/acpi-test.c

+/*
+ * Boot order test cases.
+ *
+ * Copyright (c) 2013 Red Hat Inc.
+ *
+ * Authors:
+ *  Michael S. Tsirkin <mst@redhat.com>,
+ *
+ * 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 "libqtest.h"
+
+typedef struct {
+    const char *args;
+    uint64_t expected_boot;
+    uint64_t expected_reboot;
+} boot_order_test;
+
+#define LOW(x) ((x) & 0xff)
+#define HIGH(x) ((x) >> 8)
+
+#define SIGNATURE 0xdead
+#define SIGNATURE_OFFSET 0x10
+#define BOOT_SECTOR_ADDRESS 0x7c00
+
+/* Boot sector code: write SIGNATURE into memory,
+ * then halt.
+ */
+static uint8_t boot_sector[0x200] = {
+    /* 7c00: mov $0xdead,%ax */
+    [0x00] = 0xb8,
+    [0x01] = LOW(SIGNATURE),
+    [0x02] = HIGH(SIGNATURE),
+    /* 7c03:  mov %ax,0x7c10 */
+    [0x03] = 0xa3,
+    [0x04] = LOW(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET),
+    [0x05] = HIGH(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET),
+    /* 7c06: cli */
+    [0x06] = 0xfa,
+    /* 7c07: hlt */
+    [0x07] = 0xf4,
+    /* 7c08: jmp 0x7c07=0x7c0a-3 */
+    [0x08] = 0xeb,
+    [0x09] = 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/acpi-test-disk.raw";
+
+static void test_acpi_one(const char *params)
+{
+    char *args;
+    uint8_t signature_low;
+    uint8_t signature_high;
+    uint16_t signature;
+    int i;
+    uint32_t off;
+
+
+    args = g_strdup_printf("-net none -display none %s %s",
+                           params ? params : "", disk);
+    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);
+
+    /* OK, now find RSDP */
+    for (off = 0xf0000; off < 0x100000; off += 0x10)
+    {
+        uint8_t sig[] = "RSD PTR ";
+        int i;
+
+        for (i = 0; i < sizeof sig - 1; ++i) {
+            sig[i] = readb(off + i);
+        }
+
+        if (!memcmp(sig, "RSD PTR ", sizeof sig)) {
+            break;
+        }
+    }
+
+    g_assert_cmphex(off, <, 0x100000);
+
+    qtest_quit(global_qtest);
+    g_free(args);
+}
+
+static void test_acpi_tcg(void)
+{
+    /* Supplying -machine accel argument overrides the default (qtest).
+     * This is to make guest actually run.
+     */
+    test_acpi_one("-machine accel=tcg");
+}
+
+int main(int argc, char *argv[])
+{
+    const char *arch = qtest_get_arch();
+    FILE *f = fopen(disk, "w");
+    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("acpi/tcg", test_acpi_tcg);
+    }
+    return g_test_run();
+}