[PATCH v4 5/6] ACPI ERST: qtest for ERST

[Eric DeVolder <eric.devolder@oracle.com>]

This change provides a qtest that locates and then does a simple
interrogation of the ERST feature within the guest.

Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
---
 tests/qtest/erst-test.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++++
 tests/qtest/meson.build |   2 +
 2 files changed, 111 insertions(+)
 create mode 100644 tests/qtest/erst-test.c

diff --git a/tests/qtest/erst-test.c b/tests/qtest/erst-test.c
new file mode 100644
index 0000000..7d97d62
--- /dev/null
+++ b/tests/qtest/erst-test.c
@@ -0,0 +1,109 @@
+/*
+ * QTest testcase for ACPI ERST
+ *
+ * Copyright (c) 2021 Oracle
+ *
+ * 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 "qemu/osdep.h"
+#include "qemu/bitmap.h"
+#include "qemu/uuid.h"
+#include "hw/acpi/acpi-defs.h"
+#include "boot-sector.h"
+#include "acpi-utils.h"
+#include "libqos/libqtest.h"
+#include "qapi/qmp/qdict.h"
+
+#define RSDP_ADDR_INVALID 0x100000 /* RSDP must be below this address */
+
+static uint64_t acpi_find_erst(QTestState *qts)
+{
+    uint32_t rsdp_offset;
+    uint8_t rsdp_table[36 /* ACPI 2.0+ RSDP size */];
+    uint32_t rsdt_len, table_length;
+    uint8_t *rsdt, *ent;
+    uint64_t base = 0;
+
+    /* Wait for guest firmware to finish and start the payload. */
+    boot_sector_test(qts);
+
+    /* Tables should be initialized now. */
+    rsdp_offset = acpi_find_rsdp_address(qts);
+
+    g_assert_cmphex(rsdp_offset, <, RSDP_ADDR_INVALID);
+
+    acpi_fetch_rsdp_table(qts, rsdp_offset, rsdp_table);
+    acpi_fetch_table(qts, &rsdt, &rsdt_len, &rsdp_table[16 /* RsdtAddress */],
+                     4, "RSDT", true);
+
+    ACPI_FOREACH_RSDT_ENTRY(rsdt, rsdt_len, ent, 4 /* Entry size */) {
+        uint8_t *table_aml;
+        acpi_fetch_table(qts, &table_aml, &table_length, ent, 4, NULL, true);
+        if (!memcmp(table_aml + 0 /* Header Signature */, "ERST", 4)) {
+            /*
+             * Picking up ERST base address from the Register Region
+             * specified as part of the first Serialization Instruction
+             * Action (which is a Begin Write Operation).
+             */
+            memcpy(&base, &table_aml[56], sizeof(base));
+            g_free(table_aml);
+            break;
+        }
+        g_free(table_aml);
+    }
+    g_free(rsdt);
+    return base;
+}
+
+static char disk[] = "tests/erst-test-disk-XXXXXX";
+
+#define ERST_CMD()                              \
+    "-accel kvm -accel tcg "                    \
+    "-object memory-backend-file," \
+      "id=erstram,mem-path=tests/acpi-erst-XXXXXX,size=0x10000,share=on " \
+    "-device acpi-erst,memdev=erstram,bus=pci.0 " \
+    "-drive id=hd0,if=none,file=%s,format=raw " \
+    "-device ide-hd,drive=hd0 ", disk
+
+static void erst_get_error_log_address_range(void)
+{
+    QTestState *qts;
+    uint64_t log_address_range = 0;
+
+    qts = qtest_initf(ERST_CMD());
+
+    uint64_t base = acpi_find_erst(qts);
+    g_assert(base != 0);
+
+    /* Issue GET_ERROR_LOG_ADDRESS_RANGE command */
+    qtest_writel(qts, base + 0, 0xD);
+    /* Read GET_ERROR_LOG_ADDRESS_RANGE result */
+    log_address_range = qtest_readq(qts, base + 8);\
+
+    /* Check addr_range is offset of base */
+    g_assert((base + 16) == log_address_range);
+
+    qtest_quit(qts);
+}
+
+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("/erst/get-error-log-address-range",
+                   erst_get_error_log_address_range);
+
+    ret = g_test_run();
+    boot_sector_cleanup(disk);
+
+    return ret;
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 0c76738..deae443 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -66,6 +66,7 @@ qtests_i386 = \
   (config_all_devices.has_key('CONFIG_RTL8139_PCI') ? ['rtl8139-test'] : []) +              \
   (config_all_devices.has_key('CONFIG_E1000E_PCI_EXPRESS') ? ['fuzz-e1000e-test'] : []) +   \
   (config_all_devices.has_key('CONFIG_ESP_PCI') ? ['am53c974-test'] : []) +                 \
+  (config_all_devices.has_key('CONFIG_ACPI') ? ['erst-test'] : []) +                 \
   qtests_pci +                                                                              \
   ['fdc-test',
    'ide-test',
@@ -237,6 +238,7 @@ qtests = {
   'bios-tables-test': [io, 'boot-sector.c', 'acpi-utils.c', 'tpm-emu.c'],
   'cdrom-test': files('boot-sector.c'),
   'dbus-vmstate-test': files('migration-helpers.c') + dbus_vmstate1,
+  'erst-test': files('erst-test.c', 'boot-sector.c', 'acpi-utils.c'),
   'ivshmem-test': [rt, '../../contrib/ivshmem-server/ivshmem-server.c'],
   'migration-test': files('migration-helpers.c'),
   'pxe-test': files('boot-sector.c'),
-- 
1.8.3.1