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https://github.com/projectacrn/acrn-hypervisor.git
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9a79443204
This patch adds support for, 1. Storing MBA resource and its max supported clos value in the target xml file under clos subsection. 2. Generating board.c file with MBA RDT resource. Tracked-On: #3725 Signed-off-by: Vijay Dhanraj <vijay.dhanraj@intel.com> Acked-by: Victor Sun <victor.sun@intel.com>
101 lines
3.1 KiB
Python
101 lines
3.1 KiB
Python
# Copyright (C) 2019 Intel Corporation. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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import parser_lib
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RDT_TYPE = {
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"L2":4,
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"L3":2,
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"MBA":8
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}
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def dump_cpuid_reg(cmd, reg):
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"""execute the cmd of cpuid, and return the register value by reg
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:param cmd: command what can be executed in shell
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:param reg: register name
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"""
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res = parser_lib.cmd_execute(cmd)
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if reg == "eax":
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idx = 2
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if reg == "ebx":
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idx = 3
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if reg == "edx":
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idx = 5
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while True:
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line = parser_lib.decode_stdout(res)
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if not line:
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break
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if len(line.split()) <= 2:
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continue
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reg_value = line.split()[idx].split('=')[1]
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if reg == "eax":
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res_info = int(reg_value, 16) + 1
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break
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elif reg == "ebx":
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res_info = []
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if int(reg_value, 16) & RDT_TYPE['L2'] != 0:
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res_info.append("L2")
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if int(reg_value, 16) & RDT_TYPE['L3'] != 0:
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res_info.append("L3")
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if int(reg_value, 16) & RDT_TYPE['MBA'] != 0:
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res_info.append("MBA")
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break
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elif reg == "edx":
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res_info = int(reg_value, 16) + 1
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break
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return res_info
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def get_clos_info():
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"""Get max clos, mask supported and clos cache type"""
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rdt_res = []
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rdt_clos_max = []
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rdt_mask_max = []
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cmd = "cpuid -1 -r -l 0x10"
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rdt_res = dump_cpuid_reg(cmd, "ebx")
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if len(rdt_res) == 0:
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parser_lib.print_yel("Resource Allocation is not supported!")
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else:
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for i in range(len(rdt_res)):
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if rdt_res[i] == "L2":
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cmd = "cpuid -1 -r -l 0x10 --subleaf 2"
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rdt_clos_max.append(dump_cpuid_reg(cmd, "edx"))
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l2_info = dump_cpuid_reg(cmd, "eax")
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rdt_mask_max.append(hex((1 << l2_info) - 1))
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if rdt_res[i] == "L3":
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cmd = "cpuid -1 -r -l 0x10 --subleaf 1"
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rdt_clos_max.append(dump_cpuid_reg(cmd, "edx"))
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l3_info = dump_cpuid_reg(cmd, "eax")
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rdt_mask_max.append(hex((1 << l3_info) - 1))
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if rdt_res[i] == "MBA":
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cmd = "cpuid -1 -r -l 0x10 --subleaf 3"
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rdt_clos_max.append(dump_cpuid_reg(cmd, "edx"))
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rdt_mask_max.append(hex(dump_cpuid_reg(cmd, "eax")))
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return (rdt_res, rdt_clos_max, rdt_mask_max)
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def generate_info(board_info):
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"""Generate clos information
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:param board_info: this is the file which stores the hardware board information
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"""
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(rdt_res, rdt_res_clos_max, rdt_res_mask_max) = get_clos_info()
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with open(board_info, 'a+') as config:
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print("\t<CLOS_INFO>", file=config)
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if ((len(rdt_res) != 0) and (len(rdt_res_clos_max) != 0)):
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print("\trdt resources supported:", ', '.join(rdt_res), file=config)
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print("\trdt resource clos max:",str(rdt_res_clos_max).strip('[]'), file=config)
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print("\trdt resource mask max:",str(rdt_res_mask_max).strip('[]'), file=config)
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print("\t</CLOS_INFO>\n", file=config)
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