+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Andy Gocke <agocke@gmail.com>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Andy Gocke <agocke@gmail.com>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
#include <palacios/vmx_io.h>
#include <palacios/vmm_io.h>
#include <palacios/vmx_lowlevel.h>
#include <palacios/vmm.h>
#include <palacios/vmx_handler.h>
+#include <palacios/vmm_ctrl_regs.h>
+#include <palacios/vm_guest_mem.h>
+#include <palacios/vmm_decoder.h>
+
+#ifndef CONFIG_DEBUG_IO
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
/* Same as SVM */
static int update_map(struct guest_info * info, uint16_t port, int hook_read, int hook_write)
return 0;
}
-int v3_handle_vmx_io_in(struct guest_info * info)
-{
+int v3_handle_vmx_io_in(struct guest_info * info) {
ulong_t exit_qual;
+ uint32_t instr_length = 0;
vmcs_read(VMCS_EXIT_QUAL, &exit_qual);
struct vmexit_io_qual * io_qual = (struct vmexit_io_qual *)&exit_qual;
- struct v3_io_hook * hook = v3_get_io_hook(info,io_qual->port);
+ struct v3_io_hook * hook = v3_get_io_hook(info, io_qual->port);
int read_size = 0;
- if(hook == NULL) {
+ if (hook == NULL) {
PrintError("Hook not present for IN on port %x\n", io_qual->port);
return -1;
}
- read_size = 1<<(io_qual->access_size);
+ read_size = io_qual->access_size + 1;
PrintDebug("IN of %d bytes on port %d (0x%x)\n", read_size, io_qual->port, io_qual->port);
- if(hook->read(io_qual->port, &(info->vm_regs.rax), read_size, hook->priv_data) != read_size) {
+ if (hook->read(io_qual->port, &(info->vm_regs.rax), read_size, hook->priv_data) != read_size) {
PrintError("Read failure for IN on port %x\n", io_qual->port);
return -1;
}
- uint32_t instr_length = 0;
- if(vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_length) != VMX_SUCCESS) {
+
+ if (vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_length) != VMX_SUCCESS) {
PrintError("Could not read instruction length\n");
return -1;
}
int v3_handle_vmx_io_ins(struct guest_info * info)
{
- PrintDebug("INS not implemented\n");
- return -1;
+ ulong_t exit_qual;
+
+ vmcs_read(VMCS_EXIT_QUAL, &exit_qual);
+
+ struct vmexit_io_qual * io_qual = (struct vmexit_io_qual *)&exit_qual;
+ struct v3_io_hook * hook = v3_get_io_hook(info, io_qual->port);
+ int read_size;
+ addr_t guest_va;
+ addr_t host_addr;
+ int rdi_change;
+ ulong_t rep_num = 1;
+
+ if(hook == NULL) {
+ PrintError("Hook not present for INS on port 0x%x\n", io_qual->port);
+ return -1;
+ }
+
+ PrintDebug("INS on port 0x%x\n", io_qual->port);
+
+ read_size = io_qual->access_size + 1;
+
+ if (io_qual->rep) {
+ rep_num = info->vm_regs.rcx & get_gpr_mask(info);
+ }
+
+ if ( ((struct rflags *)&(info->ctrl_regs.rflags))->df ) {
+ rdi_change = -read_size;
+ } else {
+ rdi_change = read_size;
+ }
+
+ PrintDebug("INS size=%d for %ld steps\n", read_size, rep_num);
+
+ vmcs_read(VMCS_GUEST_LINEAR_ADDR, &guest_va);
+
+ if (guest_va_to_host_va(info, guest_va, &host_addr) == -1) {
+ PrintError("Could not convert Guest VA to host VA\n");
+ return -1;
+ }
+
+ do {
+ if (hook->read(io_qual->port, (char *)host_addr, read_size, hook->priv_data) != read_size) {
+ PrintError("Read Failure for INS on port 0x%x\n", io_qual->port);
+ return -1;
+ }
+
+ host_addr += rdi_change;
+ info->vm_regs.rdi += rdi_change;
+
+ if (io_qual->rep) {
+ --info->vm_regs.rcx;
+ }
+ --rep_num;
+
+ } while (rep_num > 0);
+
+ int instr_len = 0;
+
+ vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len);
+
+ info->rip += instr_len;
+
+ return 0;
}
-int v3_handle_vmx_io_out(struct guest_info * info)
-{
+
+
+int v3_handle_vmx_io_out(struct guest_info * info) {
ulong_t exit_qual;
vmcs_read(VMCS_EXIT_QUAL, &exit_qual);
struct v3_io_hook * hook = v3_get_io_hook(info, io_qual->port);
- if(hook == NULL) {
+ if (hook == NULL) {
PrintError("Hook not present for out on port %x\n", io_qual->port);
return -1;
}
- int write_size = 1<<(io_qual->access_size);
+ int write_size = io_qual->access_size + 1;
PrintDebug("OUT of %d bytes on port %d (0x%x)\n", write_size, io_qual->port, io_qual->port);
- if(hook->write(io_qual->port, &(info->vm_regs.rax), write_size, hook->priv_data) != write_size) {
+ if (hook->write(io_qual->port, &(info->vm_regs.rax), write_size, hook->priv_data) != write_size) {
PrintError("Write failure for out on port %x\n",io_qual->port);
return -1;
}
uint32_t instr_length = 0;
- if(vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_length) != VMX_SUCCESS) {
+ if (vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_length) != VMX_SUCCESS) {
PrintError("Could not read instruction length\n");
return -1;
}
return 0;
}
-int v3_handle_vmx_io_outs(struct guest_info * info)
-{
+
+
+int v3_handle_vmx_io_outs(struct guest_info * info) {
ulong_t exit_qual;
vmcs_read(VMCS_EXIT_QUAL, &exit_qual);
struct vmexit_io_qual * io_qual = (struct vmexit_io_qual *)&exit_qual;
+ struct v3_io_hook * hook = v3_get_io_hook(info, io_qual->port);
+ int write_size;
+ addr_t guest_va;
+ addr_t host_addr;
+ int rsi_change;
+ ulong_t rep_num = 1;
+
+ if (hook == NULL) {
+ PrintError("Hook not present for OUTS on port 0x%x\n", io_qual->port);
+ return -1;
+ }
+
+ PrintDebug("OUTS on port 0x%x\n", io_qual->port);
+
+ write_size = io_qual->access_size + 1;
+
+ if (io_qual->rep) {
+ // Grab the address sized bits of rcx
+ rep_num = info->vm_regs.rcx & get_gpr_mask(info);
+ }
- PrintDebug("OUTS on port %d, (0x%x)\n", io_qual->port, io_qual->port);
- return -1;
+ if ( ((struct rflags *)&(info->ctrl_regs.rflags))->df ) {
+ rsi_change = -write_size;
+ } else {
+ rsi_change = write_size;
+ }
+
+ vmcs_read(VMCS_GUEST_LINEAR_ADDR, &guest_va);
+
+ PrintDebug("OUTS size=%d for %ld steps\n", write_size, rep_num);
+
+ if (guest_va_to_host_va(info, guest_va, &host_addr) == -1) {
+ PrintError("Could not convert guest VA to host VA\n");
+ return -1;
+ }
+
+ do {
+ if (hook->write(io_qual->port, (char *)host_addr, write_size, hook->priv_data) != write_size) {
+ PrintError("Read failure for INS on port 0x%x\n", io_qual->port);
+ return -1;
+ }
+
+ host_addr += rsi_change;
+ info->vm_regs.rsi += rsi_change;
+
+ if (io_qual->rep) {
+ --info->vm_regs.rcx;
+ }
+ --rep_num;
+
+ } while (rep_num > 0);
+
+ int instr_len = 0;
+
+ vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len);
+
+ info->rip += instr_len;
+
+ return 0;
}
+
