threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/*
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* Copyright (C) 2020 MediaTek Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/string.h>
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#include <linux/uaccess.h>
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#include <linux/unistd.h>
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#include <linux/version.h>
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#include <linux/interrupt.h>
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#include <linux/arm-smccc.h>
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#include <mt-plat/mtk_secure_api.h>
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#ifdef CONFIG_MEDIATEK_EMI
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#include <memory/mediatek/emi.h>
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#endif
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#ifdef CONFIG_MEDIATEK_EMI
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#define SECUER (1)
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#define NON_SECURE (0)
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static unsigned int is_secure(unsigned long long vio_addr)
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{
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struct arm_smccc_res smc_res;
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unsigned int addr_h = (vio_addr >> 32);
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unsigned int addr_l = (vio_addr & 0xFFFFFFFF);
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arm_smccc_smc(MTK_SIP_TMEM_CONTROL, addr_h, addr_l, 0, 0, 0, 0, 0,
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&smc_res);
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pr_debug("%s:%d 0x%X%X, %ld, %ld, %ld, %ld\n", __func__, __LINE__,
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addr_h, addr_l, smc_res.a0, smc_res.a1, smc_res.a2,
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smc_res.a3);
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if (smc_res.a0 == 0 && smc_res.a1 == SECUER)
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return 1;
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return 0;
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}
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#define EMI_MPUS_OFFSET (0x1F0)
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#define EMI_MPUT_OFFSET (0x1F8)
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#define EMI_MPUT_2ND_OFFSET (0x1FC)
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#define EMI_PHY_START (0x40000000)
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static irqreturn_t tmem_mpu_vio_handler(unsigned int emi_id,
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struct reg_info_t *dump,
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unsigned int len)
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{
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unsigned int i;
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unsigned int mpus = 0, mput = 0, mput_2nd = 0;
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unsigned long long vio_addr;
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unsigned int master_id, domain_id;
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unsigned int port_id;
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unsigned int wr_vio, wr_oo_vio;
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unsigned int hp_wr_vio;
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for (i = 0; i < len; i++) {
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if (dump[i].offset == EMI_MPUS_OFFSET)
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mpus = dump[i].value;
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if (dump[i].offset == EMI_MPUT_OFFSET)
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mput = dump[i].value;
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if (dump[i].offset == EMI_MPUT_2ND_OFFSET)
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mput_2nd = dump[i].value;
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}
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if (!mput && !mput_2nd) {
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pr_err("%s:%d failed to get violation from emi\n", __func__,
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__LINE__);
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return IRQ_NONE;
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}
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vio_addr = ((((unsigned long long)(mput_2nd & 0xF)) << 32) + mput
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+ EMI_PHY_START);
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hp_wr_vio = (mput_2nd >> 21) & 0x3;
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master_id = mpus & 0xFFFF;
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domain_id = (mpus >> 21) & 0xF;
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wr_vio = (mpus >> 29) & 0x3;
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wr_oo_vio = (mpus >> 27) & 0x3;
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port_id = master_id & 0x7;
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if ((wr_vio == 2) && (wr_oo_vio == 0)
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&& ((port_id == 0) || (port_id == 1))) {
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if (is_secure(vio_addr)) {
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pr_info("%s:%d vio msg ignored at emi%d (0x%x,%d,%d,%d,%d)\n",
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__func__, __LINE__, emi_id, master_id,
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domain_id, wr_vio, wr_oo_vio, port_id);
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return IRQ_HANDLED;
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}
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}
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return IRQ_NONE;
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}
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#endif
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static int __init tmem_mpu_vio_init(void)
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{
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int ret = 0;
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#ifdef CONFIG_MEDIATEK_EMI
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ret = mtk_emimpu_register_callback(tmem_mpu_vio_handler);
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if (ret) {
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pr_err("%s:%d failed to register emi tmem handler, ret=%d!\n",
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__func__, __LINE__, ret);
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return ret;
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}
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#else
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pr_info("%s:%d vio checker is not registered!\n", __func__, __LINE__);
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#endif
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return ret;
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}
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static void __exit tmem_mpu_vio_exit(void)
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{
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}
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module_init(tmem_mpu_vio_init);
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module_exit(tmem_mpu_vio_exit);
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MODULE_AUTHOR("MediaTek Inc.");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("MediaTek Trusted Memory Violation Checker");
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