From 56a8fbf4b8d368562273336cf8f43068aaed91a3 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 10 Dec 2012 16:29:50 +0000 Subject: arm64: KVM: MMIO access backend Define the necessary structures to perform an MMIO access. Reviewed-by: Christopher Covington Reviewed-by: Catalin Marinas Signed-off-by: Marc Zyngier (cherry picked from commit d7246bf3571a82834984a42db52261525bc11159) Signed-off-by: Christoffer Dall --- arch/arm64/include/asm/kvm_mmio.h | 59 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 arch/arm64/include/asm/kvm_mmio.h (limited to 'arch/arm64/include/asm/kvm_mmio.h') diff --git a/arch/arm64/include/asm/kvm_mmio.h b/arch/arm64/include/asm/kvm_mmio.h new file mode 100644 index 000000000000..fc2f689c0694 --- /dev/null +++ b/arch/arm64/include/asm/kvm_mmio.h @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2012 - Virtual Open Systems and Columbia University + * Author: Christoffer Dall + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef __ARM64_KVM_MMIO_H__ +#define __ARM64_KVM_MMIO_H__ + +#include +#include +#include + +/* + * This is annoying. The mmio code requires this, even if we don't + * need any decoding. To be fixed. + */ +struct kvm_decode { + unsigned long rt; + bool sign_extend; +}; + +/* + * The in-kernel MMIO emulation code wants to use a copy of run->mmio, + * which is an anonymous type. Use our own type instead. + */ +struct kvm_exit_mmio { + phys_addr_t phys_addr; + u8 data[8]; + u32 len; + bool is_write; +}; + +static inline void kvm_prepare_mmio(struct kvm_run *run, + struct kvm_exit_mmio *mmio) +{ + run->mmio.phys_addr = mmio->phys_addr; + run->mmio.len = mmio->len; + run->mmio.is_write = mmio->is_write; + memcpy(run->mmio.data, mmio->data, mmio->len); + run->exit_reason = KVM_EXIT_MMIO; +} + +int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run); +int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run, + phys_addr_t fault_ipa); + +#endif /* __ARM64_KVM_MMIO_H__ */ -- cgit v1.2.3