ACPI: Build related register address fields via hardware error fw_cfg blob
This patch builds error_block_address and read_ack_register fields
in hardware errors table , the error_block_address points to Generic
Error Status Block(GESB) via bios_linker. The max size for one GESB
is 1kb, For more detailed information, please refer to
document: docs/specs/acpi_hest_ghes.rst
Now we only support one Error source, if necessary, we can extend to
support more.
Suggested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200512030609.19593-5-gengdongjiu@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
new file mode 100644
index 0000000..e1b3f8f
--- /dev/null
+++ b/hw/acpi/ghes.c
@@ -0,0 +1,89 @@
+/*
+ * Support for generating APEI tables and recording CPER for Guests
+ *
+ * Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ * Author: Dongjiu Geng <gengdongjiu@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/units.h"
+#include "hw/acpi/ghes.h"
+#include "hw/acpi/aml-build.h"
+
+#define ACPI_GHES_ERRORS_FW_CFG_FILE "etc/hardware_errors"
+#define ACPI_GHES_DATA_ADDR_FW_CFG_FILE "etc/hardware_errors_addr"
+
+/* The max size in bytes for one error block */
+#define ACPI_GHES_MAX_RAW_DATA_LENGTH (1 * KiB)
+
+/* Now only support ARMv8 SEA notification type error source */
+#define ACPI_GHES_ERROR_SOURCE_COUNT 1
+
+/*
+ * Build table for the hardware error fw_cfg blob.
+ * Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
+ * See docs/specs/acpi_hest_ghes.rst for blobs format.
+ */
+void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
+{
+ int i, error_status_block_offset;
+
+ /* Build error_block_address */
+ for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+ build_append_int_noprefix(hardware_errors, 0, sizeof(uint64_t));
+ }
+
+ /* Build read_ack_register */
+ for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+ /*
+ * Initialize the value of read_ack_register to 1, so GHES can be
+ * writeable after (re)boot.
+ * ACPI 6.2: 18.3.2.8 Generic Hardware Error Source version 2
+ * (GHESv2 - Type 10)
+ */
+ build_append_int_noprefix(hardware_errors, 1, sizeof(uint64_t));
+ }
+
+ /* Generic Error Status Block offset in the hardware error fw_cfg blob */
+ error_status_block_offset = hardware_errors->len;
+
+ /* Reserve space for Error Status Data Block */
+ acpi_data_push(hardware_errors,
+ ACPI_GHES_MAX_RAW_DATA_LENGTH * ACPI_GHES_ERROR_SOURCE_COUNT);
+
+ /* Tell guest firmware to place hardware_errors blob into RAM */
+ bios_linker_loader_alloc(linker, ACPI_GHES_ERRORS_FW_CFG_FILE,
+ hardware_errors, sizeof(uint64_t), false);
+
+ for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+ /*
+ * Tell firmware to patch error_block_address entries to point to
+ * corresponding "Generic Error Status Block"
+ */
+ bios_linker_loader_add_pointer(linker,
+ ACPI_GHES_ERRORS_FW_CFG_FILE, sizeof(uint64_t) * i,
+ sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
+ error_status_block_offset + i * ACPI_GHES_MAX_RAW_DATA_LENGTH);
+ }
+
+ /*
+ * tell firmware to write hardware_errors GPA into
+ * hardware_errors_addr fw_cfg, once the former has been initialized.
+ */
+ bios_linker_loader_write_pointer(linker, ACPI_GHES_DATA_ADDR_FW_CFG_FILE,
+ 0, sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE, 0);
+}
