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Message-ID: <20250129161151.2c55d398@imammedo.users.ipa.redhat.com>
Date: Wed, 29 Jan 2025 16:11:51 +0100
From: Igor Mammedov <imammedo@...hat.com>
To: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc: "Michael S . Tsirkin" <mst@...hat.com>, Jonathan Cameron
<Jonathan.Cameron@...wei.com>, Shiju Jose <shiju.jose@...wei.com>,
qemu-arm@...gnu.org, qemu-devel@...gnu.org, Cleber Rosa <crosa@...hat.com>,
John Snow <jsnow@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 13/13] scripts/ghes_inject: add a script to generate
GHES error inject
On Wed, 29 Jan 2025 09:04:19 +0100
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> wrote:
> Using the QMP GHESv2 API requires preparing a raw data array
> containing a CPER record.
>
> Add a helper script with subcommands to prepare such data.
>
> Currently, only ARM Processor error CPER record is supported.
perhaps add here examples of possible usage,
and maybe to inject-ghes-v2-error doc section as well
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
> MAINTAINERS | 3 +
> scripts/arm_processor_error.py | 377 ++++++++++++++++++
> scripts/ghes_inject.py | 51 +++
> scripts/qmp_helper.py | 702 +++++++++++++++++++++++++++++++++
> 4 files changed, 1133 insertions(+)
> create mode 100644 scripts/arm_processor_error.py
> create mode 100755 scripts/ghes_inject.py
> create mode 100644 scripts/qmp_helper.py
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 8e1f662fa0e0..99a9ba5c2ace 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2081,6 +2081,9 @@ S: Maintained
> F: hw/arm/ghes_cper.c
> F: hw/acpi/ghes_cper_stub.c
> F: qapi/acpi-hest.json
> +F: scripts/ghes_inject.py
> +F: scripts/arm_processor_error.py
> +F: scripts/qmp_helper.py
>
> ppc4xx
> L: qemu-ppc@...gnu.org
> diff --git a/scripts/arm_processor_error.py b/scripts/arm_processor_error.py
> new file mode 100644
> index 000000000000..4ac04ab08299
> --- /dev/null
> +++ b/scripts/arm_processor_error.py
> @@ -0,0 +1,377 @@
> +#!/usr/bin/env python3
> +#
> +# pylint: disable=C0301,C0114,R0903,R0912,R0913,R0914,R0915,W0511
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Copyright (C) 2024-2025 Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> +
> +# TODO: current implementation has dummy defaults.
> +#
> +# For a better implementation, a QMP addition/call is needed to
> +# retrieve some data for ARM Processor Error injection:
> +#
> +# - ARM registers: power_state, mpidr.
> +
> +import argparse
> +import re
> +
> +from qmp_helper import qmp, util, cper_guid
> +
> +class ArmProcessorEinj:
> + """
> + Implements ARM Processor Error injection via GHES
> + """
> +
> + DESC = """
> + Generates an ARM processor error CPER, compatible with
> + UEFI 2.9A Errata.
> + """
> +
> + ACPI_GHES_ARM_CPER_LENGTH = 40
> + ACPI_GHES_ARM_CPER_PEI_LENGTH = 32
> +
> + # Context types
> + CONTEXT_AARCH32_EL1 = 1
> + CONTEXT_AARCH64_EL1 = 5
> + CONTEXT_MISC_REG = 8
> +
> + def __init__(self, subparsers):
> + """Initialize the error injection class and add subparser"""
> +
> + # Valid choice values
> + self.arm_valid_bits = {
> + "mpidr": util.bit(0),
> + "affinity": util.bit(1),
> + "running": util.bit(2),
> + "vendor": util.bit(3),
> + }
> +
> + self.pei_flags = {
> + "first": util.bit(0),
> + "last": util.bit(1),
> + "propagated": util.bit(2),
> + "overflow": util.bit(3),
> + }
> +
> + self.pei_error_types = {
> + "cache": util.bit(1),
> + "tlb": util.bit(2),
> + "bus": util.bit(3),
> + "micro-arch": util.bit(4),
> + }
> +
> + self.pei_valid_bits = {
> + "multiple-error": util.bit(0),
> + "flags": util.bit(1),
> + "error-info": util.bit(2),
> + "virt-addr": util.bit(3),
> + "phy-addr": util.bit(4),
> + }
> +
> + self.data = bytearray()
> +
> + parser = subparsers.add_parser("arm", description=self.DESC)
> +
> + arm_valid_bits = ",".join(self.arm_valid_bits.keys())
> + flags = ",".join(self.pei_flags.keys())
> + error_types = ",".join(self.pei_error_types.keys())
> + pei_valid_bits = ",".join(self.pei_valid_bits.keys())
> +
> + # UEFI N.16 ARM Validation bits
> + g_arm = parser.add_argument_group("ARM processor")
> + g_arm.add_argument("--arm", "--arm-valid",
> + help=f"ARM valid bits: {arm_valid_bits}")
> + g_arm.add_argument("-a", "--affinity", "--level", "--affinity-level",
> + type=lambda x: int(x, 0),
> + help="Affinity level (when multiple levels apply)")
> + g_arm.add_argument("-l", "--mpidr", type=lambda x: int(x, 0),
> + help="Multiprocessor Affinity Register")
> + g_arm.add_argument("-i", "--midr", type=lambda x: int(x, 0),
> + help="Main ID Register")
> + g_arm.add_argument("-r", "--running",
> + action=argparse.BooleanOptionalAction,
> + default=None,
> + help="Indicates if the processor is running or not")
> + g_arm.add_argument("--psci", "--psci-state",
> + type=lambda x: int(x, 0),
> + help="Power State Coordination Interface - PSCI state")
> +
> + # TODO: Add vendor-specific support
> +
> + # UEFI N.17 bitmaps (type and flags)
> + g_pei = parser.add_argument_group("ARM Processor Error Info (PEI)")
> + g_pei.add_argument("-t", "--type", nargs="+",
> + help=f"one or more error types: {error_types}")
> + g_pei.add_argument("-f", "--flags", nargs="*",
> + help=f"zero or more error flags: {flags}")
> + g_pei.add_argument("-V", "--pei-valid", "--error-valid", nargs="*",
> + help=f"zero or more PEI valid bits: {pei_valid_bits}")
> +
> + # UEFI N.17 Integer values
> + g_pei.add_argument("-m", "--multiple-error", nargs="+",
> + help="Number of errors: 0: Single error, 1: Multiple errors, 2-65535: Error count if known")
> + g_pei.add_argument("-e", "--error-info", nargs="+",
> + help="Error information (UEFI 2.10 tables N.18 to N.20)")
> + g_pei.add_argument("-p", "--physical-address", nargs="+",
> + help="Physical address")
> + g_pei.add_argument("-v", "--virtual-address", nargs="+",
> + help="Virtual address")
> +
> + # UEFI N.21 Context
> + g_ctx = parser.add_argument_group("Processor Context")
> + g_ctx.add_argument("--ctx-type", "--context-type", nargs="*",
> + help="Type of the context (0=ARM32 GPR, 5=ARM64 EL1, other values supported)")
> + g_ctx.add_argument("--ctx-size", "--context-size", nargs="*",
> + help="Minimal size of the context")
> + g_ctx.add_argument("--ctx-array", "--context-array", nargs="*",
> + help="Comma-separated arrays for each context")
> +
> + # Vendor-specific data
> + g_vendor = parser.add_argument_group("Vendor-specific data")
> + g_vendor.add_argument("--vendor", "--vendor-specific", nargs="+",
> + help="Vendor-specific byte arrays of data")
> +
> + # Add arguments for Generic Error Data
> + qmp.argparse(parser)
> +
> + parser.set_defaults(func=self.send_cper)
> +
> + def send_cper(self, args):
> + """Parse subcommand arguments and send a CPER via QMP"""
> +
> + qmp_cmd = qmp(args.host, args.port, args.debug)
> +
> + # Handle Generic Error Data arguments if any
> + qmp_cmd.set_args(args)
> +
> + is_cpu_type = re.compile(r"^([\w+]+\-)?arm\-cpu$")
> + cpus = qmp_cmd.search_qom("/machine/unattached/device",
> + "type", is_cpu_type)
> +
> + cper = {}
> + pei = {}
> + ctx = {}
> + vendor = {}
> +
> + arg = vars(args)
> +
> + # Handle global parameters
> + if args.arm:
> + arm_valid_init = False
> + cper["valid"] = util.get_choice(name="valid",
> + value=args.arm,
> + choices=self.arm_valid_bits,
> + suffixes=["-error", "-err"])
> + else:
> + cper["valid"] = 0
> + arm_valid_init = True
> +
> + if "running" in arg:
> + if args.running:
> + cper["running-state"] = util.bit(0)
> + else:
> + cper["running-state"] = 0
> + else:
> + cper["running-state"] = 0
> +
> + if arm_valid_init:
> + if args.affinity:
> + cper["valid"] |= self.arm_valid_bits["affinity"]
> +
> + if args.mpidr:
> + cper["valid"] |= self.arm_valid_bits["mpidr"]
> +
> + if "running-state" in cper:
> + cper["valid"] |= self.arm_valid_bits["running"]
> +
> + if args.psci:
> + cper["valid"] |= self.arm_valid_bits["running"]
> +
> + # Handle PEI
> + if not args.type:
> + args.type = ["cache-error"]
> +
> + util.get_mult_choices(
> + pei,
> + name="valid",
> + values=args.pei_valid,
> + choices=self.pei_valid_bits,
> + suffixes=["-valid", "--addr"],
> + )
> + util.get_mult_choices(
> + pei,
> + name="type",
> + values=args.type,
> + choices=self.pei_error_types,
> + suffixes=["-error", "-err"],
> + )
> + util.get_mult_choices(
> + pei,
> + name="flags",
> + values=args.flags,
> + choices=self.pei_flags,
> + suffixes=["-error", "-cap"],
> + )
> + util.get_mult_int(pei, "error-info", args.error_info)
> + util.get_mult_int(pei, "multiple-error", args.multiple_error)
> + util.get_mult_int(pei, "phy-addr", args.physical_address)
> + util.get_mult_int(pei, "virt-addr", args.virtual_address)
> +
> + # Handle context
> + util.get_mult_int(ctx, "type", args.ctx_type, allow_zero=True)
> + util.get_mult_int(ctx, "minimal-size", args.ctx_size, allow_zero=True)
> + util.get_mult_array(ctx, "register", args.ctx_array, allow_zero=True)
> +
> + util.get_mult_array(vendor, "bytes", args.vendor, max_val=255)
> +
> + # Store PEI
> + pei_data = bytearray()
> + default_flags = self.pei_flags["first"]
> + default_flags |= self.pei_flags["last"]
> +
> + error_info_num = 0
> +
> + for i, p in pei.items(): # pylint: disable=W0612
> + error_info_num += 1
> +
> + # UEFI 2.10 doesn't define how to encode error information
> + # when multiple types are raised. So, provide a default only
> + # if a single type is there
> + if "error-info" not in p:
> + if p["type"] == util.bit(1):
> + p["error-info"] = 0x0091000F
> + if p["type"] == util.bit(2):
> + p["error-info"] = 0x0054007F
> + if p["type"] == util.bit(3):
> + p["error-info"] = 0x80D6460FFF
> + if p["type"] == util.bit(4):
> + p["error-info"] = 0x78DA03FF
> +
> + if "valid" not in p:
> + p["valid"] = 0
> + if "multiple-error" in p:
> + p["valid"] |= self.pei_valid_bits["multiple-error"]
> +
> + if "flags" in p:
> + p["valid"] |= self.pei_valid_bits["flags"]
> +
> + if "error-info" in p:
> + p["valid"] |= self.pei_valid_bits["error-info"]
> +
> + if "phy-addr" in p:
> + p["valid"] |= self.pei_valid_bits["phy-addr"]
> +
> + if "virt-addr" in p:
> + p["valid"] |= self.pei_valid_bits["virt-addr"]
> +
> + # Version
> + util.data_add(pei_data, 0, 1)
> +
> + util.data_add(pei_data,
> + self.ACPI_GHES_ARM_CPER_PEI_LENGTH, 1)
> +
> + util.data_add(pei_data, p["valid"], 2)
> + util.data_add(pei_data, p["type"], 1)
> + util.data_add(pei_data, p.get("multiple-error", 1), 2)
> + util.data_add(pei_data, p.get("flags", default_flags), 1)
> + util.data_add(pei_data, p.get("error-info", 0), 8)
> + util.data_add(pei_data, p.get("virt-addr", 0xDEADBEEF), 8)
> + util.data_add(pei_data, p.get("phy-addr", 0xABBA0BAD), 8)
> +
> + # Store Context
> + ctx_data = bytearray()
> + context_info_num = 0
> +
> + if ctx:
> + ret = qmp_cmd.send_cmd("query-target", may_open=True)
> +
> + default_ctx = self.CONTEXT_MISC_REG
> +
> + if "arch" in ret:
> + if ret["arch"] == "aarch64":
> + default_ctx = self.CONTEXT_AARCH64_EL1
> + elif ret["arch"] == "arm":
> + default_ctx = self.CONTEXT_AARCH32_EL1
> +
> + for k in sorted(ctx.keys()):
> + context_info_num += 1
> +
> + if "type" not in ctx[k]:
> + ctx[k]["type"] = default_ctx
> +
> + if "register" not in ctx[k]:
> + ctx[k]["register"] = []
> +
> + reg_size = len(ctx[k]["register"])
> + size = 0
> +
> + if "minimal-size" in ctx:
> + size = ctx[k]["minimal-size"]
> +
> + size = max(size, reg_size)
> +
> + size = (size + 1) % 0xFFFE
> +
> + # Version
> + util.data_add(ctx_data, 0, 2)
> +
> + util.data_add(ctx_data, ctx[k]["type"], 2)
> +
> + util.data_add(ctx_data, 8 * size, 4)
> +
> + for r in ctx[k]["register"]:
> + util.data_add(ctx_data, r, 8)
> +
> + for i in range(reg_size, size): # pylint: disable=W0612
> + util.data_add(ctx_data, 0, 8)
> +
> + # Vendor-specific bytes are not grouped
> + vendor_data = bytearray()
> + if vendor:
> + for k in sorted(vendor.keys()):
> + for b in vendor[k]["bytes"]:
> + util.data_add(vendor_data, b, 1)
> +
> + # Encode ARM Processor Error
> + data = bytearray()
> +
> + util.data_add(data, cper["valid"], 4)
> +
> + util.data_add(data, error_info_num, 2)
> + util.data_add(data, context_info_num, 2)
> +
> + # Calculate the length of the CPER data
> + cper_length = self.ACPI_GHES_ARM_CPER_LENGTH
> + cper_length += len(pei_data)
> + cper_length += len(vendor_data)
> + cper_length += len(ctx_data)
> + util.data_add(data, cper_length, 4)
> +
> + util.data_add(data, arg.get("affinity-level", 0), 1)
> +
> + # Reserved
> + util.data_add(data, 0, 3)
> +
> + if "midr-el1" not in arg:
> + if cpus:
> + cmd_arg = {
> + 'path': cpus[0],
> + 'property': "midr"
> + }
> + ret = qmp_cmd.send_cmd("qom-get", cmd_arg, may_open=True)
> + if isinstance(ret, int):
> + arg["midr-el1"] = ret
> +
> + util.data_add(data, arg.get("mpidr-el1", 0), 8)
> + util.data_add(data, arg.get("midr-el1", 0), 8)
> + util.data_add(data, cper["running-state"], 4)
> + util.data_add(data, arg.get("psci-state", 0), 4)
> +
> + # Add PEI
> + data.extend(pei_data)
> + data.extend(ctx_data)
> + data.extend(vendor_data)
> +
> + self.data = data
> +
> + qmp_cmd.send_cper(cper_guid.CPER_PROC_ARM, self.data)
> diff --git a/scripts/ghes_inject.py b/scripts/ghes_inject.py
> new file mode 100755
> index 000000000000..5d72bc7f09e1
> --- /dev/null
> +++ b/scripts/ghes_inject.py
> @@ -0,0 +1,51 @@
> +#!/usr/bin/env python3
> +#
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Copyright (C) 2024-2025 Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> +
> +"""
> +Handle ACPI GHESv2 error injection logic QEMU QMP interface.
> +"""
> +
> +import argparse
> +import sys
> +
> +from arm_processor_error import ArmProcessorEinj
> +
> +EINJ_DESC = """
> +Handle ACPI GHESv2 error injection logic QEMU QMP interface.
> +
> +It allows using UEFI BIOS EINJ features to generate GHES records.
> +
> +It helps testing CPER and GHES drivers at the guest OS and how
> +userspace applications at the guest handle them.
> +"""
> +
> +def main():
> + """Main program"""
> +
> + # Main parser - handle generic args like QEMU QMP TCP socket options
> + parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter,
> + usage="%(prog)s [options]",
> + description=EINJ_DESC)
> +
> + g_options = parser.add_argument_group("QEMU QMP socket options")
> + g_options.add_argument("-H", "--host", default="localhost", type=str,
> + help="host name")
> + g_options.add_argument("-P", "--port", default=4445, type=int,
> + help="TCP port number")
> + g_options.add_argument('-d', '--debug', action='store_true')
> +
> + subparsers = parser.add_subparsers()
> +
> + ArmProcessorEinj(subparsers)
> +
> + args = parser.parse_args()
> + if "func" in args:
> + args.func(args)
> + else:
> + sys.exit(f"Please specify a valid command for {sys.argv[0]}")
> +
> +if __name__ == "__main__":
> + main()
> diff --git a/scripts/qmp_helper.py b/scripts/qmp_helper.py
> new file mode 100644
> index 000000000000..4f7ebb31b424
> --- /dev/null
> +++ b/scripts/qmp_helper.py
> @@ -0,0 +1,702 @@
> +#!/usr/bin/env python3
> +#
> +# # pylint: disable=C0103,E0213,E1135,E1136,E1137,R0902,R0903,R0912,R0913
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Copyright (C) 2024-2025 Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> +
> +"""
> +Helper classes to be used by ghes_inject command classes.
> +"""
> +
> +import json
> +import sys
> +
> +from datetime import datetime
> +from os import path as os_path
> +
> +try:
> + qemu_dir = os_path.abspath(os_path.dirname(os_path.dirname(__file__)))
> + sys.path.append(os_path.join(qemu_dir, 'python'))
> +
> + from qemu.qmp.legacy import QEMUMonitorProtocol
> +
> +except ModuleNotFoundError as exc:
> + print(f"Module '{exc.name}' not found.")
> + print("Try export PYTHONPATH=top-qemu-dir/python or run from top-qemu-dir")
> + sys.exit(1)
> +
> +from base64 import b64encode
> +
> +class util:
> + """
> + Ancillary functions to deal with bitmaps, parse arguments,
> + generate GUID and encode data on a bytearray buffer.
> + """
> +
> + #
> + # Helper routines to handle multiple choice arguments
> + #
> + def get_choice(name, value, choices, suffixes=None, bitmask=True):
> + """Produce a list from multiple choice argument"""
> +
> + new_values = 0
> +
> + if not value:
> + return new_values
> +
> + for val in value.split(","):
> + val = val.lower()
> +
> + if suffixes:
> + for suffix in suffixes:
> + val = val.removesuffix(suffix)
> +
> + if val not in choices.keys():
> + if suffixes:
> + for suffix in suffixes:
> + if val + suffix in choices.keys():
> + val += suffix
> + break
> +
> + if val not in choices.keys():
> + sys.exit(f"Error on '{name}': choice '{val}' is invalid.")
> +
> + val = choices[val]
> +
> + if bitmask:
> + new_values |= val
> + else:
> + if new_values:
> + sys.exit(f"Error on '{name}': only one value is accepted.")
> +
> + new_values = val
> +
> + return new_values
> +
> + def get_array(name, values, max_val=None):
> + """Add numbered hashes from integer lists into an array"""
> +
> + array = []
> +
> + for value in values:
> + for val in value.split(","):
> + try:
> + val = int(val, 0)
> + except ValueError:
> + sys.exit(f"Error on '{name}': {val} is not an integer")
> +
> + if val < 0:
> + sys.exit(f"Error on '{name}': {val} is not unsigned")
> +
> + if max_val and val > max_val:
> + sys.exit(f"Error on '{name}': {val} is too little")
> +
> + array.append(val)
> +
> + return array
> +
> + def get_mult_array(mult, name, values, allow_zero=False, max_val=None):
> + """Add numbered hashes from integer lists"""
> +
> + if not allow_zero:
> + if not values:
> + return
> + else:
> + if values is None:
> + return
> +
> + if not values:
> + i = 0
> + if i not in mult:
> + mult[i] = {}
> +
> + mult[i][name] = []
> + return
> +
> + i = 0
> + for value in values:
> + for val in value.split(","):
> + try:
> + val = int(val, 0)
> + except ValueError:
> + sys.exit(f"Error on '{name}': {val} is not an integer")
> +
> + if val < 0:
> + sys.exit(f"Error on '{name}': {val} is not unsigned")
> +
> + if max_val and val > max_val:
> + sys.exit(f"Error on '{name}': {val} is too little")
> +
> + if i not in mult:
> + mult[i] = {}
> +
> + if name not in mult[i]:
> + mult[i][name] = []
> +
> + mult[i][name].append(val)
> +
> + i += 1
> +
> +
> + def get_mult_choices(mult, name, values, choices,
> + suffixes=None, allow_zero=False):
> + """Add numbered hashes from multiple choice arguments"""
> +
> + if not allow_zero:
> + if not values:
> + return
> + else:
> + if values is None:
> + return
> +
> + i = 0
> + for val in values:
> + new_values = util.get_choice(name, val, choices, suffixes)
> +
> + if i not in mult:
> + mult[i] = {}
> +
> + mult[i][name] = new_values
> + i += 1
> +
> +
> + def get_mult_int(mult, name, values, allow_zero=False):
> + """Add numbered hashes from integer arguments"""
> + if not allow_zero:
> + if not values:
> + return
> + else:
> + if values is None:
> + return
> +
> + i = 0
> + for val in values:
> + try:
> + val = int(val, 0)
> + except ValueError:
> + sys.exit(f"Error on '{name}': {val} is not an integer")
> +
> + if val < 0:
> + sys.exit(f"Error on '{name}': {val} is not unsigned")
> +
> + if i not in mult:
> + mult[i] = {}
> +
> + mult[i][name] = val
> + i += 1
> +
> +
> + #
> + # Data encode helper functions
> + #
> + def bit(b):
> + """Simple macro to define a bit on a bitmask"""
> + return 1 << b
> +
> +
> + def data_add(data, value, num_bytes):
> + """Adds bytes from value inside a bitarray"""
> +
> + data.extend(value.to_bytes(num_bytes, byteorder="little")) # pylint: disable=E1101
> +
> + def dump_bytearray(name, data):
> + """Does an hexdump of a byte array, grouping in bytes"""
> +
> + print(f"{name} ({len(data)} bytes):")
> +
> + for ln_start in range(0, len(data), 16):
> + ln_end = min(ln_start + 16, len(data))
> + print(f" {ln_start:08x} ", end="")
> + for i in range(ln_start, ln_end):
> + print(f"{data[i]:02x} ", end="")
> + for i in range(ln_end, ln_start + 16):
> + print(" ", end="")
> + print(" ", end="")
> + for i in range(ln_start, ln_end):
> + if data[i] >= 32 and data[i] < 127:
> + print(chr(data[i]), end="")
> + else:
> + print(".", end="")
> +
> + print()
> + print()
> +
> + def time(string):
> + """Handle BCD timestamps used on Generic Error Data Block"""
> +
> + time = None
> +
> + # Formats to be used when parsing time stamps
> + formats = [
> + "%Y-%m-%d %H:%M:%S",
> + ]
> +
> + if string == "now":
> + time = datetime.now()
> +
> + if time is None:
> + for fmt in formats:
> + try:
> + time = datetime.strptime(string, fmt)
> + break
> + except ValueError:
> + pass
> +
> + if time is None:
> + raise ValueError("Invalid time format")
> +
> + return time
> +
> +class guid:
> + """
> + Simple class to handle GUID fields.
> + """
> +
> + def __init__(self, time_low, time_mid, time_high, nodes):
> + """Initialize a GUID value"""
> +
> + assert len(nodes) == 8
> +
> + self.time_low = time_low
> + self.time_mid = time_mid
> + self.time_high = time_high
> + self.nodes = nodes
> +
> + @classmethod
> + def UUID(cls, guid_str):
> + """Initialize a GUID using a string on its standard format"""
> +
> + if len(guid_str) != 36:
> + print("Size not 36")
> + raise ValueError('Invalid GUID size')
> +
> + # It is easier to parse without separators. So, drop them
> + guid_str = guid_str.replace('-', '')
> +
> + if len(guid_str) != 32:
> + print("Size not 32", guid_str, len(guid_str))
> + raise ValueError('Invalid GUID hex size')
> +
> + time_low = 0
> + time_mid = 0
> + time_high = 0
> + nodes = []
> +
> + for i in reversed(range(16, 32, 2)):
> + h = guid_str[i:i + 2]
> + value = int(h, 16)
> + nodes.insert(0, value)
> +
> + time_high = int(guid_str[12:16], 16)
> + time_mid = int(guid_str[8:12], 16)
> + time_low = int(guid_str[0:8], 16)
> +
> + return cls(time_low, time_mid, time_high, nodes)
> +
> + def __str__(self):
> + """Output a GUID value on its default string representation"""
> +
> + clock = self.nodes[0] << 8 | self.nodes[1]
> +
> + node = 0
> + for i in range(2, len(self.nodes)):
> + node = node << 8 | self.nodes[i]
> +
> + s = f"{self.time_low:08x}-{self.time_mid:04x}-"
> + s += f"{self.time_high:04x}-{clock:04x}-{node:012x}"
> + return s
> +
> + def to_bytes(self):
> + """Output a GUID value in bytes"""
> +
> + data = bytearray()
> +
> + util.data_add(data, self.time_low, 4)
> + util.data_add(data, self.time_mid, 2)
> + util.data_add(data, self.time_high, 2)
> + data.extend(bytearray(self.nodes))
> +
> + return data
> +
> +class qmp:
> + """
> + Opens a connection and send/receive QMP commands.
> + """
> +
> + def send_cmd(self, command, args=None, may_open=False, return_error=True):
> + """Send a command to QMP, optinally opening a connection"""
> +
> + if may_open:
> + self._connect()
> + elif not self.connected:
> + return False
> +
> + msg = { 'execute': command }
> + if args:
> + msg['arguments'] = args
> +
> + try:
> + obj = self.qmp_monitor.cmd_obj(msg)
> + # Can we use some other exception class here?
> + except Exception as e: # pylint: disable=W0718
> + print(f"Command: {command}")
> + print(f"Failed to inject error: {e}.")
> + return None
> +
> + if "return" in obj:
> + if isinstance(obj.get("return"), dict):
> + if obj["return"]:
> + return obj["return"]
> + return "OK"
> +
> + return obj["return"]
> +
> + if isinstance(obj.get("error"), dict):
> + error = obj["error"]
> + if return_error:
> + print(f"Command: {msg}")
> + print(f'{error["class"]}: {error["desc"]}')
> + else:
> + print(json.dumps(obj))
> +
> + return None
> +
> + def _close(self):
> + """Shutdown and close the socket, if opened"""
> + if not self.connected:
> + return
> +
> + self.qmp_monitor.close()
> + self.connected = False
> +
> + def _connect(self):
> + """Connect to a QMP TCP/IP port, if not connected yet"""
> +
> + if self.connected:
> + return True
> +
> + try:
> + self.qmp_monitor.connect(negotiate=True)
> + except ConnectionError:
> + sys.exit(f"Can't connect to QMP host {self.host}:{self.port}")
> +
> + self.connected = True
> +
> + return True
> +
> + BLOCK_STATUS_BITS = {
> + "uncorrectable": util.bit(0),
> + "correctable": util.bit(1),
> + "multi-uncorrectable": util.bit(2),
> + "multi-correctable": util.bit(3),
> + }
> +
> + ERROR_SEVERITY = {
> + "recoverable": 0,
> + "fatal": 1,
> + "corrected": 2,
> + "none": 3,
> + }
> +
> + VALIDATION_BITS = {
> + "fru-id": util.bit(0),
> + "fru-text": util.bit(1),
> + "timestamp": util.bit(2),
> + }
> +
> + GEDB_FLAGS_BITS = {
> + "recovered": util.bit(0),
> + "prev-error": util.bit(1),
> + "simulated": util.bit(2),
> + }
> +
> + GENERIC_DATA_SIZE = 72
> +
> + def argparse(parser):
> + """Prepare a parser group to query generic error data"""
> +
> + block_status_bits = ",".join(qmp.BLOCK_STATUS_BITS.keys())
> + error_severity_enum = ",".join(qmp.ERROR_SEVERITY.keys())
> + validation_bits = ",".join(qmp.VALIDATION_BITS.keys())
> + gedb_flags_bits = ",".join(qmp.GEDB_FLAGS_BITS.keys())
> +
> + g_gen = parser.add_argument_group("Generic Error Data") # pylint: disable=E1101
> + g_gen.add_argument("--block-status",
> + help=f"block status bits: {block_status_bits}")
> + g_gen.add_argument("--raw-data", nargs="+",
> + help="Raw data inside the Error Status Block")
> + g_gen.add_argument("--error-severity", "--severity",
> + help=f"error severity: {error_severity_enum}")
> + g_gen.add_argument("--gen-err-valid-bits",
> + "--generic-error-validation-bits",
> + help=f"validation bits: {validation_bits}")
> + g_gen.add_argument("--fru-id", type=guid.UUID,
> + help="GUID representing a physical device")
> + g_gen.add_argument("--fru-text",
> + help="ASCII string identifying the FRU hardware")
> + g_gen.add_argument("--timestamp", type=util.time,
> + help="Time when the error info was collected")
> + g_gen.add_argument("--precise", "--precise-timestamp",
> + action='store_true',
> + help="Marks the timestamp as precise if --timestamp is used")
> + g_gen.add_argument("--gedb-flags",
> + help=f"General Error Data Block flags: {gedb_flags_bits}")
> +
> + def set_args(self, args):
> + """Set the arguments optionally defined via self.argparse()"""
> +
> + if args.block_status:
> + self.block_status = util.get_choice(name="block-status",
> + value=args.block_status,
> + choices=self.BLOCK_STATUS_BITS,
> + bitmask=False)
> + if args.raw_data:
> + self.raw_data = util.get_array("raw-data", args.raw_data,
> + max_val=255)
> + print(self.raw_data)
> +
> + if args.error_severity:
> + self.error_severity = util.get_choice(name="error-severity",
> + value=args.error_severity,
> + choices=self.ERROR_SEVERITY,
> + bitmask=False)
> +
> + if args.fru_id:
> + self.fru_id = args.fru_id.to_bytes()
> + if not args.gen_err_valid_bits:
> + self.validation_bits |= self.VALIDATION_BITS["fru-id"]
> +
> + if args.fru_text:
> + text = bytearray(args.fru_text.encode('ascii'))
> + if len(text) > 20:
> + sys.exit("FRU text is too big to fit")
> +
> + self.fru_text = text
> + if not args.gen_err_valid_bits:
> + self.validation_bits |= self.VALIDATION_BITS["fru-text"]
> +
> + if args.timestamp:
> + time = args.timestamp
> + century = int(time.year / 100)
> +
> + bcd = bytearray()
> + util.data_add(bcd, (time.second // 10) << 4 | (time.second % 10), 1)
> + util.data_add(bcd, (time.minute // 10) << 4 | (time.minute % 10), 1)
> + util.data_add(bcd, (time.hour // 10) << 4 | (time.hour % 10), 1)
> +
> + if args.precise:
> + util.data_add(bcd, 1, 1)
> + else:
> + util.data_add(bcd, 0, 1)
> +
> + util.data_add(bcd, (time.day // 10) << 4 | (time.day % 10), 1)
> + util.data_add(bcd, (time.month // 10) << 4 | (time.month % 10), 1)
> + util.data_add(bcd,
> + ((time.year % 100) // 10) << 4 | (time.year % 10), 1)
> + util.data_add(bcd, ((century % 100) // 10) << 4 | (century % 10), 1)
> +
> + self.timestamp = bcd
> + if not args.gen_err_valid_bits:
> + self.validation_bits |= self.VALIDATION_BITS["timestamp"]
> +
> + if args.gen_err_valid_bits:
> + self.validation_bits = util.get_choice(name="validation",
> + value=args.gen_err_valid_bits,
> + choices=self.VALIDATION_BITS)
> +
> + def __init__(self, host, port, debug=False):
> + """Initialize variables used by the QMP send logic"""
> +
> + self.connected = False
> + self.host = host
> + self.port = port
> + self.debug = debug
> +
> + # ACPI 6.1: 18.3.2.7.1 Generic Error Data: Generic Error Status Block
> + self.block_status = self.BLOCK_STATUS_BITS["uncorrectable"]
> + self.raw_data = []
> + self.error_severity = self.ERROR_SEVERITY["recoverable"]
> +
> + # ACPI 6.1: 18.3.2.7.1 Generic Error Data: Generic Error Data Entry
> + self.validation_bits = 0
> + self.flags = 0
> + self.fru_id = bytearray(16)
> + self.fru_text = bytearray(20)
> + self.timestamp = bytearray(8)
> +
> + self.qmp_monitor = QEMUMonitorProtocol(address=(self.host, self.port))
> +
> + #
> + # Socket QMP send command
> + #
> + def send_cper_raw(self, cper_data):
> + """Send a raw CPER data to QEMU though QMP TCP socket"""
> +
> + data = b64encode(bytes(cper_data)).decode('ascii')
> +
> + cmd_arg = {
> + 'cper': data
> + }
> +
> + self._connect()
> +
> + if self.send_cmd("inject-ghes-error", cmd_arg):
> + print("Error injected.")
> +
> + def send_cper(self, notif_type, payload):
> + """Send commands to QEMU though QMP TCP socket"""
> +
> + # Fill CPER record header
> +
> + # NOTE: bits 4 to 13 of block status contain the number of
> + # data entries in the data section. This is currently unsupported.
> +
> + cper_length = len(payload)
> + data_length = cper_length + len(self.raw_data) + self.GENERIC_DATA_SIZE
> +
> + # Generic Error Data Entry
> + gede = bytearray()
> +
> + gede.extend(notif_type.to_bytes())
> + util.data_add(gede, self.error_severity, 4)
> + util.data_add(gede, 0x300, 2)
> + util.data_add(gede, self.validation_bits, 1)
> + util.data_add(gede, self.flags, 1)
> + util.data_add(gede, cper_length, 4)
> + gede.extend(self.fru_id)
> + gede.extend(self.fru_text)
> + gede.extend(self.timestamp)
> +
> + # Generic Error Status Block
> + gebs = bytearray()
> +
> + if self.raw_data:
> + raw_data_offset = len(gebs)
> + else:
> + raw_data_offset = 0
> +
> + util.data_add(gebs, self.block_status, 4)
> + util.data_add(gebs, raw_data_offset, 4)
> + util.data_add(gebs, len(self.raw_data), 4)
> + util.data_add(gebs, data_length, 4)
> + util.data_add(gebs, self.error_severity, 4)
> +
> + cper_data = bytearray()
> + cper_data.extend(gebs)
> + cper_data.extend(gede)
> + cper_data.extend(bytearray(self.raw_data))
> + cper_data.extend(bytearray(payload))
> +
> + if self.debug:
> + print(f"GUID: {notif_type}")
> +
> + util.dump_bytearray("Generic Error Status Block", gebs)
> + util.dump_bytearray("Generic Error Data Entry", gede)
> +
> + if self.raw_data:
> + util.dump_bytearray("Raw data", bytearray(self.raw_data))
> +
> + util.dump_bytearray("Payload", payload)
> +
> + self.send_cper_raw(cper_data)
> +
> +
> + def search_qom(self, path, prop, regex):
> + """
> + Return a list of devices that match path array like:
> +
> + /machine/unattached/device
> + /machine/peripheral-anon/device
> + ...
> + """
> +
> + found = []
> +
> + i = 0
> + while 1:
> + dev = f"{path}[{i}]"
> + args = {
> + 'path': dev,
> + 'property': prop
> + }
> + ret = self.send_cmd("qom-get", args, may_open=True, return_error=False)
> + if not ret:
> + break
> +
> + if isinstance(ret, str):
> + if regex.search(ret):
> + found.append(dev)
> +
> + i += 1
> + if i > 10000:
> + print("Too many objects returned by qom-get!")
> + break
> +
> + return found
> +
> +class cper_guid:
> + """
> + Contains CPER GUID, as per:
> + https://uefi.org/specs/UEFI/2.10/Apx_N_Common_Platform_Error_Record.html
> + """
> +
> + CPER_PROC_GENERIC = guid(0x9876CCAD, 0x47B4, 0x4bdb,
> + [0xB6, 0x5E, 0x16, 0xF1,
> + 0x93, 0xC4, 0xF3, 0xDB])
> +
> + CPER_PROC_X86 = guid(0xDC3EA0B0, 0xA144, 0x4797,
> + [0xB9, 0x5B, 0x53, 0xFA,
> + 0x24, 0x2B, 0x6E, 0x1D])
> +
> + CPER_PROC_ITANIUM = guid(0xe429faf1, 0x3cb7, 0x11d4,
> + [0xbc, 0xa7, 0x00, 0x80,
> + 0xc7, 0x3c, 0x88, 0x81])
> +
> + CPER_PROC_ARM = guid(0xE19E3D16, 0xBC11, 0x11E4,
> + [0x9C, 0xAA, 0xC2, 0x05,
> + 0x1D, 0x5D, 0x46, 0xB0])
> +
> + CPER_PLATFORM_MEM = guid(0xA5BC1114, 0x6F64, 0x4EDE,
> + [0xB8, 0x63, 0x3E, 0x83,
> + 0xED, 0x7C, 0x83, 0xB1])
> +
> + CPER_PLATFORM_MEM2 = guid(0x61EC04FC, 0x48E6, 0xD813,
> + [0x25, 0xC9, 0x8D, 0xAA,
> + 0x44, 0x75, 0x0B, 0x12])
> +
> + CPER_PCIE = guid(0xD995E954, 0xBBC1, 0x430F,
> + [0xAD, 0x91, 0xB4, 0x4D,
> + 0xCB, 0x3C, 0x6F, 0x35])
> +
> + CPER_PCI_BUS = guid(0xC5753963, 0x3B84, 0x4095,
> + [0xBF, 0x78, 0xED, 0xDA,
> + 0xD3, 0xF9, 0xC9, 0xDD])
> +
> + CPER_PCI_DEV = guid(0xEB5E4685, 0xCA66, 0x4769,
> + [0xB6, 0xA2, 0x26, 0x06,
> + 0x8B, 0x00, 0x13, 0x26])
> +
> + CPER_FW_ERROR = guid(0x81212A96, 0x09ED, 0x4996,
> + [0x94, 0x71, 0x8D, 0x72,
> + 0x9C, 0x8E, 0x69, 0xED])
> +
> + CPER_DMA_GENERIC = guid(0x5B51FEF7, 0xC79D, 0x4434,
> + [0x8F, 0x1B, 0xAA, 0x62,
> + 0xDE, 0x3E, 0x2C, 0x64])
> +
> + CPER_DMA_VT = guid(0x71761D37, 0x32B2, 0x45cd,
> + [0xA7, 0xD0, 0xB0, 0xFE,
> + 0xDD, 0x93, 0xE8, 0xCF])
> +
> + CPER_DMA_IOMMU = guid(0x036F84E1, 0x7F37, 0x428c,
> + [0xA7, 0x9E, 0x57, 0x5F,
> + 0xDF, 0xAA, 0x84, 0xEC])
> +
> + CPER_CCIX_PER = guid(0x91335EF6, 0xEBFB, 0x4478,
> + [0xA6, 0xA6, 0x88, 0xB7,
> + 0x28, 0xCF, 0x75, 0xD7])
> +
> + CPER_CXL_PROT_ERR = guid(0x80B9EFB4, 0x52B5, 0x4DE3,
> + [0xA7, 0x77, 0x68, 0x78,
> + 0x4B, 0x77, 0x10, 0x48])
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