+++ /dev/null
-#include <geekos/svm_io.h>
-#include <geekos/vmm_io.h>
-#include <geekos/vmm_ctrl_regs.h>
-#include <geekos/vmm_emulate.h>
-#include <geekos/vm_guest_mem.h>
-
-
-// This should package up an IO request and call vmm_handle_io
-int handle_svm_io_in(struct guest_info * info) {
- vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
- // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
- struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
-
- vmm_io_hook_t * hook = get_io_hook(&(info->io_map), io_info->port);
- uint_t read_size = 0;
-
- if (hook == NULL) {
- // error, we should not have exited on this port
- return -1;
- }
-
- PrintDebug("IN on port %d (0x%x)\n", io_info->port, io_info->port);
-
- if (io_info->sz8) {
- read_size = 1;
- } else if (io_info->sz16) {
- read_size = 2;
- } else if (io_info->sz32) {
- read_size = 4;
- }
-
-
- if (hook->read(io_info->port, &(info->vm_regs.rax), read_size) != read_size) {
- // not sure how we handle errors.....
- return -1;
- }
-
- info->rip = ctrl_area->exit_info2;
-
- return 0;
-}
-
-
-
-
-
-/* We might not handle wrap around of the RDI register correctly...
- * In that if we do wrap around the effect will manifest in the higher bits of the register
- */
-int handle_svm_io_ins(struct guest_info * info) {
- vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
- vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
-
- struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
-
- vmm_io_hook_t * hook = get_io_hook(&(info->io_map), io_info->port);
- uint_t read_size = 0;
- addr_t base_addr = guest_state->es.base ;
- addr_t dst_addr = 0;
- uint_t rep_num = 1;
- ullong_t mask = 0;
-
-
-
- // This is kind of hacky...
- // direction can equal either 1 or -1
- // We will multiply the final added offset by this value to go the correct direction
- int direction = 1;
- struct rflags * flags = (struct rflags *)&(guest_state->rflags);
- if (flags->df) {
- direction = -1;
- }
-
-
- if (hook == NULL) {
- // error, we should not have exited on this port
- return -1;
- }
-
- PrintDebug("INS on port %d (0x%x)\n", io_info->port, io_info->port);
-
- if (io_info->sz8) {
- read_size = 1;
- } else if (io_info->sz16) {
- read_size = 2;
- } else if (io_info->sz32) {
- read_size = 4;
- }
-
-
- if (io_info->addr16) {
- mask = 0xffff;
- } else if (io_info->addr32) {
- mask = 0xffffffff;
- } else if (io_info->addr64) {
- mask = 0xffffffffffffffffLL;
- } else {
- // should never happen
- return -1;
- }
-
- if (io_info->rep) {
- rep_num = info->vm_regs.rcx & mask;
- }
-
-
-
- while (rep_num > 0) {
- addr_t host_addr;
- dst_addr = get_addr_linear(info, info->vm_regs.rdi & mask, base_addr);
-
- if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) {
- // either page fault or gpf...
- }
-
- if (hook->read(io_info->port, (char*)host_addr, read_size) != read_size) {
- // not sure how we handle errors.....
- return -1;
- }
-
- info->vm_regs.rdi += read_size * direction;
-
- if (io_info->rep)
- info->vm_regs.rcx--;
-
- rep_num--;
- }
-
-
- info->rip = ctrl_area->exit_info2;
-
- return 0;
-}
-
-int handle_svm_io_out(struct guest_info * info) {
- vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
- // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
- struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
-
- vmm_io_hook_t * hook = get_io_hook(&(info->io_map), io_info->port);
- uint_t write_size = 0;
-
- if (hook == NULL) {
- // error, we should not have exited on this port
- return -1;
- }
-
- PrintDebug("OUT on port %d (0x%x)\n", io_info->port, io_info->port);
-
- if (io_info->sz8) {
- write_size = 1;
- } else if (io_info->sz16) {
- write_size = 2;
- } else if (io_info->sz32) {
- write_size = 4;
- }
-
-
- if (hook->write(io_info->port, &(info->vm_regs.rax), write_size) != write_size) {
- // not sure how we handle errors.....
- return -1;
- }
-
- info->rip = ctrl_area->exit_info2;
-
- return 0;
-}
-
-
-/* We might not handle wrap around of the RSI register correctly...
- * In that if we do wrap around the effect will manifest in the higher bits of the register
- */
-
-int handle_svm_io_outs(struct guest_info * info) {
- vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
- vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
-
- struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
-
- vmm_io_hook_t * hook = get_io_hook(&(info->io_map), io_info->port);
- uint_t write_size = 0;
- addr_t base_addr = guest_state->ds.base;
- addr_t dst_addr = 0;
- uint_t rep_num = 1;
- ullong_t mask = 0;
-
-
-
- // This is kind of hacky...
- // direction can equal either 1 or -1
- // We will multiply the final added offset by this value to go the correct direction
- int direction = 1;
- struct rflags * flags = (struct rflags *)&(guest_state->rflags);
- if (flags->df) {
- direction = -1;
- }
-
-
- if (hook == NULL) {
- // error, we should not have exited on this port
- return -1;
- }
-
- PrintDebug("OUTS on port %d (0x%x)\n", io_info->port, io_info->port);
-
- if (io_info->sz8) {
- write_size = 1;
- } else if (io_info->sz16) {
- write_size = 2;
- } else if (io_info->sz32) {
- write_size = 4;
- }
-
-
- if (io_info->addr16) {
- mask = 0xffff;
- } else if (io_info->addr32) {
- mask = 0xffffffff;
- } else if (io_info->addr64) {
- mask = 0xffffffffffffffffLL;
- } else {
- // should never happen
- return -1;
- }
-
- if (io_info->rep) {
- rep_num = info->vm_regs.rcx & mask;
- }
-
-
- while (rep_num > 0) {
- addr_t host_addr;
- dst_addr = get_addr_linear(info, (info->vm_regs.rsi & mask), base_addr);
-
- if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) {
- // either page fault or gpf...
- }
-
- if (hook->write(io_info->port, (char*)host_addr, write_size) != write_size) {
- // not sure how we handle errors.....
- return -1;
- }
-
- info->vm_regs.rsi += write_size * direction;
-
- if (io_info->rep)
- info->vm_regs.rcx--;
-
- rep_num--;
- }
-
-
- info->rip = ctrl_area->exit_info2;
-
-
- return 0;
-
-
-
-}