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For a GICv2 there is always only one (v)CPU involved: the one that does the access. On a GICv3 the access to a CPU redistributor is memory-mapped, but not banked, so the (v)CPU affected is determined by looking at the MMIO address region being accessed. To allow passing the affected CPU into the accessors later, extend struct kvm_exit_mmio to add an opaque private pointer parameter. The current GICv2 emulation just does not use it. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Author: 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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#ifndef __ARM_KVM_MMIO_H__
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#define __ARM_KVM_MMIO_H__
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#include <linux/kvm_host.h>
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#include <asm/kvm_asm.h>
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#include <asm/kvm_arm.h>
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struct kvm_decode {
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unsigned long rt;
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bool sign_extend;
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};
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/*
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* The in-kernel MMIO emulation code wants to use a copy of run->mmio,
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* which is an anonymous type. Use our own type instead.
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*/
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struct kvm_exit_mmio {
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phys_addr_t phys_addr;
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u8 data[8];
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u32 len;
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bool is_write;
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void *private;
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};
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static inline void kvm_prepare_mmio(struct kvm_run *run,
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struct kvm_exit_mmio *mmio)
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{
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run->mmio.phys_addr = mmio->phys_addr;
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run->mmio.len = mmio->len;
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run->mmio.is_write = mmio->is_write;
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memcpy(run->mmio.data, mmio->data, mmio->len);
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run->exit_reason = KVM_EXIT_MMIO;
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}
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int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
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int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run,
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phys_addr_t fault_ipa);
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#endif /* __ARM_KVM_MMIO_H__ */
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