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-rw-r--r--virt/kvm/arm/mmio.c200
1 files changed, 0 insertions, 200 deletions
diff --git a/virt/kvm/arm/mmio.c b/virt/kvm/arm/mmio.c
deleted file mode 100644
index aedfcff99ac5..000000000000
--- a/virt/kvm/arm/mmio.c
+++ /dev/null
@@ -1,200 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2012 - Virtual Open Systems and Columbia University
- * Author: Christoffer Dall <c.dall@virtualopensystems.com>
- */
-
-#include <linux/kvm_host.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;
-
- /* Detect an already handled MMIO return */
- if (unlikely(!vcpu->mmio_needed))
- return 0;
-
- vcpu->mmio_needed = 0;
-
- if (!kvm_vcpu_dabt_iswrite(vcpu)) {
- len = kvm_vcpu_dabt_get_as(vcpu);
- data = kvm_mmio_read_buf(run->mmio.data, len);
-
- if (kvm_vcpu_dabt_issext(vcpu) &&
- len < sizeof(unsigned long)) {
- mask = 1U << ((len * 8) - 1);
- data = (data ^ mask) - mask;
- }
-
- if (!kvm_vcpu_dabt_issf(vcpu))
- data = data & 0xffffffff;
-
- 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, kvm_vcpu_dabt_get_rd(vcpu), data);
- }
-
- /*
- * 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];
-
- /*
- * No valid syndrome? Ask userspace for help if it has
- * voluntered to do so, and bail out otherwise.
- */
- if (!kvm_vcpu_dabt_isvalid(vcpu)) {
- if (vcpu->kvm->arch.return_nisv_io_abort_to_user) {
- run->exit_reason = KVM_EXIT_ARM_NISV;
- run->arm_nisv.esr_iss = kvm_vcpu_dabt_iss_nisv_sanitized(vcpu);
- run->arm_nisv.fault_ipa = fault_ipa;
- return 0;
- }
-
- kvm_pr_unimpl("Data abort outside memslots with no valid syndrome info\n");
- return -ENOSYS;
- }
-
- /* Page table accesses IO mem: tell guest to fix its TTBR */
- if (kvm_vcpu_dabt_iss1tw(vcpu)) {
- kvm_inject_dabt(vcpu, kvm_vcpu_get_hfar(vcpu));
- return 1;
- }
-
- /*
- * 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.
- */
- is_write = kvm_vcpu_dabt_iswrite(vcpu);
- len = kvm_vcpu_dabt_get_as(vcpu);
- rt = kvm_vcpu_dabt_get_rd(vcpu);
-
- 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, NULL);
-
- 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;
- vcpu->mmio_needed = 1;
-
- 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;
-}