44 lines
1.2 KiB
C
Executable File
44 lines
1.2 KiB
C
Executable File
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2023 - Google Inc
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* Author: Mostafa Saleh <smostafa@google.com>
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* Simple module for pKVM SMC filtering.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <asm/kvm_pkvm_module.h>
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#define HYP_EVENT_FILE ../../../../drivers/misc/pkvm-smc/pkvm/events.h
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#include <asm/kvm_define_hypevents.h>
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static unsigned long pkvm_module_token;
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int kvm_nvhe_sym(pkvm_smc_filter_hyp_init)(const struct pkvm_module_ops *ops);
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extern int kvm_nvhe_sym(permissive);
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static bool permissive;
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module_param(permissive, bool, 0444);
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MODULE_PARM_DESC(permissive, "Only log SMC filter violations.");
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static int __init smc_filter_init(void)
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{
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int ret;
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kvm_nvhe_sym(permissive) = permissive;
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ret = pkvm_load_el2_module(kvm_nvhe_sym(pkvm_smc_filter_hyp_init),
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&pkvm_module_token);
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if (ret)
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pr_err("Failed to register pKVM SMC filter: %d\n", ret);
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else
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pr_info("pKVM SMC filter registered successfully with permissive = %s\n",
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permissive ? "true" : "false");
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return ret;
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}
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module_init(smc_filter_init);
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MODULE_AUTHOR("Mostafa Saleh <smostafa@google.com>");
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MODULE_DESCRIPTION("pKVM SMC filter");
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MODULE_LICENSE("GPL v2");
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