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-rw-r--r--arch/arm/kvm/mmio.c217
1 files changed, 0 insertions, 217 deletions
diff --git a/arch/arm/kvm/mmio.c b/arch/arm/kvm/mmio.c
deleted file mode 100644
index b6e715fd3c90..000000000000
--- a/arch/arm/kvm/mmio.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * Copyright (C) 2012 - Virtual Open Systems and Columbia University
- * Author: Christoffer Dall <c.dall@virtualopensystems.com>
- *
- * 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, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include <linux/kvm_host.h>
-#include <asm/kvm_mmio.h>
-#include <asm/kvm_emulate.h>
-#include <trace/events/kvm.h>
-
-#include "trace.h"
-
-void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data)
-{
- void *datap = NULL;
- union {
- u8 byte;
- u16 hword;
- u32 word;
- u64 dword;
- } tmp;
-
- switch (len) {
- case 1:
- tmp.byte = data;
- datap = &tmp.byte;
- break;
- case 2:
- tmp.hword = data;
- datap = &tmp.hword;
- break;
- case 4:
- tmp.word = data;
- datap = &tmp.word;
- break;
- case 8:
- tmp.dword = data;
- datap = &tmp.dword;
- break;
- }
-
- memcpy(buf, datap, len);
-}
-
-unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len)
-{
- unsigned long data = 0;
- union {
- u16 hword;
- u32 word;
- u64 dword;
- } tmp;
-
- switch (len) {
- case 1:
- data = *(u8 *)buf;
- break;
- case 2:
- memcpy(&tmp.hword, buf, len);
- data = tmp.hword;
- break;
- case 4:
- memcpy(&tmp.word, buf, len);
- data = tmp.word;
- break;
- case 8:
- memcpy(&tmp.dword, buf, len);
- data = tmp.dword;
- break;
- }
-
- return data;
-}
-
-/**
- * kvm_handle_mmio_return -- Handle MMIO loads after user space emulation
- * or in-kernel IO emulation
- *
- * @vcpu: The VCPU pointer
- * @run: The VCPU run struct containing the mmio data
- */
-int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run)
-{
- unsigned long data;
- unsigned int len;
- int mask;
-
- if (!run->mmio.is_write) {
- len = run->mmio.len;
- if (len > sizeof(unsigned long))
- return -EINVAL;
-
- data = kvm_mmio_read_buf(run->mmio.data, len);
-
- if (vcpu->arch.mmio_decode.sign_extend &&
- len < sizeof(unsigned long)) {
- mask = 1U << ((len * 8) - 1);
- data = (data ^ mask) - mask;
- }
-
- trace_kvm_mmio(KVM_TRACE_MMIO_READ, len, run->mmio.phys_addr,
- data);
- data = vcpu_data_host_to_guest(vcpu, data, len);
- vcpu_set_reg(vcpu, vcpu->arch.mmio_decode.rt, data);
- }
-
- return 0;
-}
-
-static int decode_hsr(struct kvm_vcpu *vcpu, bool *is_write, int *len)
-{
- unsigned long rt;
- int access_size;
- bool sign_extend;
-
- if (kvm_vcpu_dabt_iss1tw(vcpu)) {
- /* page table accesses IO mem: tell guest to fix its TTBR */
- kvm_inject_dabt(vcpu, kvm_vcpu_get_hfar(vcpu));
- return 1;
- }
-
- access_size = kvm_vcpu_dabt_get_as(vcpu);
- if (unlikely(access_size < 0))
- return access_size;
-
- *is_write = kvm_vcpu_dabt_iswrite(vcpu);
- sign_extend = kvm_vcpu_dabt_issext(vcpu);
- rt = kvm_vcpu_dabt_get_rd(vcpu);
-
- *len = access_size;
- vcpu->arch.mmio_decode.sign_extend = sign_extend;
- vcpu->arch.mmio_decode.rt = rt;
-
- /*
- * The MMIO instruction is emulated and should not be re-executed
- * in the guest.
- */
- kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu));
- return 0;
-}
-
-int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run,
- phys_addr_t fault_ipa)
-{
- unsigned long data;
- unsigned long rt;
- int ret;
- bool is_write;
- int len;
- u8 data_buf[8];
-
- /*
- * Prepare MMIO operation. First decode the syndrome data we get
- * from the CPU. Then try if some in-kernel emulation feels
- * responsible, otherwise let user space do its magic.
- */
- if (kvm_vcpu_dabt_isvalid(vcpu)) {
- ret = decode_hsr(vcpu, &is_write, &len);
- if (ret)
- return ret;
- } else {
- kvm_err("load/store instruction decoding not implemented\n");
- return -ENOSYS;
- }
-
- rt = vcpu->arch.mmio_decode.rt;
-
- if (is_write) {
- data = vcpu_data_guest_to_host(vcpu, vcpu_get_reg(vcpu, rt),
- len);
-
- trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, len, fault_ipa, data);
- kvm_mmio_write_buf(data_buf, len, data);
-
- ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, fault_ipa, len,
- data_buf);
- } else {
- trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, len,
- fault_ipa, 0);
-
- ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, fault_ipa, len,
- data_buf);
- }
-
- /* Now prepare kvm_run for the potential return to userland. */
- run->mmio.is_write = is_write;
- run->mmio.phys_addr = fault_ipa;
- run->mmio.len = len;
-
- if (!ret) {
- /* We handled the access successfully in the kernel. */
- if (!is_write)
- memcpy(run->mmio.data, data_buf, len);
- vcpu->stat.mmio_exit_kernel++;
- kvm_handle_mmio_return(vcpu, run);
- return 1;
- }
-
- if (is_write)
- memcpy(run->mmio.data, data_buf, len);
- vcpu->stat.mmio_exit_user++;
- run->exit_reason = KVM_EXIT_MMIO;
- return 0;
-}