8034699a42
In order to be able to detect the point where the guest enables its MMU and caches, trap all the VM related system registers. Once we see the guest enabling both the MMU and the caches, we can go back to a saner mode of operation, which is to leave these registers in complete control of the guest. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Authors: Rusty Russell <rusty@rustcorp.au>
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* Christoffer Dall <c.dall@virtualopensystems.com>
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <linux/kvm_host.h>
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#include <asm/kvm_coproc.h>
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#include <asm/kvm_emulate.h>
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#include <linux/init.h>
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#include "coproc.h"
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/*
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* A15-specific CP15 registers.
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* CRn denotes the primary register number, but is copied to the CRm in the
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* user space API for 64-bit register access in line with the terminology used
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* in the ARM ARM.
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* Important: Must be sorted ascending by CRn, CRM, Op1, Op2 and with 64-bit
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* registers preceding 32-bit ones.
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*/
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static const struct coproc_reg a15_regs[] = {
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/* SCTLR: swapped by interrupt.S. */
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{ CRn( 1), CRm( 0), Op1( 0), Op2( 0), is32,
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access_sctlr, reset_val, c1_SCTLR, 0x00C50078 },
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};
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static struct kvm_coproc_target_table a15_target_table = {
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.target = KVM_ARM_TARGET_CORTEX_A15,
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.table = a15_regs,
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.num = ARRAY_SIZE(a15_regs),
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};
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static int __init coproc_a15_init(void)
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{
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kvm_register_target_coproc_table(&a15_target_table);
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return 0;
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}
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late_initcall(coproc_a15_init);
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