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[gerrit]
host=gerrit.opnfv.org
port=29418
project=apex.git
} /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */ } 
/*
// Copyright (c) 2010-2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/

#include <inttypes.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>

#include "msr.h"
#include "log.h"

int msr_fd[RTE_MAX_LCORE];
int n_msr_fd;
int msr_init(void)
{
	char msr_path[1024];

	if (n_msr_fd) {
		return 0;
	}

	for (uint32_t i = 0; i < sizeof(msr_fd)/sizeof(*msr_fd); ++i, n_msr_fd = i) {
		snprintf(msr_path, sizeof(msr_path), "/dev/cpu/%u/msr", i);
		msr_fd[i] = open(msr_path, O_RDWR);
		if (msr_fd[i] < 0) {
			return i == 0? -1 : 0;
		}
	}

	return 0;
}

void msr_cleanup(void)
{
	for (int i = 0; i < n_msr_fd; ++i) {
		close(msr_fd[i]);
	}

	n_msr_fd = 0;
}

int msr_read(uint64_t *ret, int lcore_id, off_t offset)
{
	if (lcore_id > n_msr_fd) {
		return -1;
	}

	if (0 > pread(msr_fd[lcore_id], ret, sizeof(uint64_t), offset)) {
		return -1;
	}

	return 0;
}

int msr_write(int lcore_id, uint64_t val, off_t offset)
{
	if (lcore_id > n_msr_fd) {
		return -1;
	}

	if (sizeof(uint64_t) != pwrite(msr_fd[lcore_id], &val, sizeof(uint64_t), offset)) {
		return -1;
	}
	// plogx_dbg("\t\tmsr_write(core %d, offset %x, val %lx)\n", lcore_id, (int)offset, val);
	return 0;
}