#include <palacios/vmx_io.h>
#include <palacios/vmx.h>
#include <palacios/vmm_ctrl_regs.h>
+#include <palacios/vmm_lowlevel.h>
+#include <palacios/vmx_ctrl_regs.h>
+#include <palacios/vmx_assist.h>
static int inline check_vmcs_write(vmcs_field_t field, addr_t val)
{
int ret = 0;
- ret = vmcs_write(field,val);
+ ret = vmcs_write(field, val);
if (ret != VMX_SUCCESS) {
PrintError("VMWRITE error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
- return 1;
}
- return 0;
+ return ret;
}
static int inline check_vmcs_read(vmcs_field_t field, void * val)
{
int ret = 0;
- ret = vmcs_read(field,val);
+ ret = vmcs_read(field, val);
- if(ret != VMX_SUCCESS) {
+ if (ret != VMX_SUCCESS) {
PrintError("VMREAD error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
- return ret;
}
- return 0;
+ return ret;
}
static void inline translate_access_to_v3_seg(struct vmcs_segment_access * access,
- struct v3_segment * v3_seg)
-{
+ struct v3_segment * v3_seg) {
v3_seg->type = access->type;
v3_seg->system = access->desc_type;
v3_seg->dpl = access->dpl;
v3_seg->granularity = access->granularity;
}
-static void load_vmcs_guest_state(struct guest_info * info)
+static int load_vmcs_guest_state(struct guest_info * info)
{
- check_vmcs_read(VMCS_GUEST_RIP, &(info->rip));
- check_vmcs_read(VMCS_GUEST_RSP, &(info->vm_regs.rsp));
- check_vmcs_read(VMCS_GUEST_CR0, &(info->ctrl_regs.cr0));
- check_vmcs_read(VMCS_GUEST_CR3, &(info->ctrl_regs.cr3));
- check_vmcs_read(VMCS_GUEST_CR4, &(info->ctrl_regs.cr4));
struct vmcs_segment_access access;
+ int ret = 0;
+
+ // JRL: Add error checking
memset(&access, 0, sizeof(access));
/* IDTR Segment */
check_vmcs_read(VMCS_GUEST_IDTR_BASE, &(info->segments.idtr.base));
check_vmcs_read(VMCS_GUEST_IDTR_LIMIT, &(info->segments.idtr.limit));
+
+
+ /*
+ * Read the control state
+ */
+ check_vmcs_read(VMCS_GUEST_RIP, &(info->rip));
+ check_vmcs_read(VMCS_GUEST_RSP, &(info->vm_regs.rsp));
+ check_vmcs_read(VMCS_GUEST_CR0, &(info->ctrl_regs.cr0));
+ check_vmcs_read(VMCS_CR0_READ_SHDW, &(info->shdw_pg_state.guest_cr0));
+ check_vmcs_read(VMCS_GUEST_CR3, &(info->ctrl_regs.cr3));
+ check_vmcs_read(VMCS_GUEST_CR4, &(info->ctrl_regs.cr4));
+
+ return ret;
}
+#if 0
static void setup_v8086_mode_for_boot(struct guest_info * info)
{
flags->iopl = 3;
info->rip = 0xfff0;
- //info->vm_regs.rsp = 0x0;
/* Zero the segment registers */
memset(&(info->segments), 0, sizeof(struct v3_segment)*6);
seg_ptr[i].granularity = 0;
}
- PrintDebug("END INFO!\n");
-#if 0
- for(i = 6; i < 10; i++) {
- seg_ptr[i].base = 0x0;
- seg_ptr[i].limit = 0xffff;
- }
-
- info->segments.ldtr.type = 2;
- info->segments.ldtr.system = 0;
- info->segments.ldtr.present = 1;
- info->segments.ldtr.granularity = 0;
-
- info->segments.tr.type = 3;
- info->segments.tr.system = 0;
- info->segments.tr.present = 1;
- info->segments.tr.granularity = 0;
-#endif
}
-static int inline handle_cr_access(struct guest_info * info, ulong_t exit_qual)
-{
+#endif
+
+static int inline handle_cr_access(struct guest_info * info, ulong_t exit_qual) {
struct vmexit_cr_qual * cr_qual = (struct vmexit_cr_qual *)&exit_qual;
- if(cr_qual->access_type < 2) {
- ulong_t reg = 0;
- switch(cr_qual->gpr) {
+ PrintDebug("Control register: %d\n", cr_qual->access_type);
+
+ if (cr_qual->access_type < 2) {
+ v3_reg_t reg = 0;
+
+ switch(cr_qual->gpr) {
case 0:
reg = info->vm_regs.rax;
break;
reg = info->vm_regs.r15;
break;
}
- PrintDebug("RAX: %p\n", (void *)info->vm_regs.rax);
-
- if(cr_qual->cr_id == 0
- && (~reg & CR0_PE)
- && ((struct vmx_data*)info->vmm_data)->state == VMXASSIST_STARTUP) {
- setup_v8086_mode_for_boot(info);
- info->shdw_pg_state.guest_cr0 = 0x0;
- v3_update_vmcs_guest_state(info);
+
+ if (cr_qual->cr_id == 0) {
+ uint32_t instr_len;
+
+ vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len);
+
+ if ( ~reg & CR0_PE ) {
+
+ if (v3_vmxassist_ctx_switch(info) != 0) {
+ PrintError("Unable to execute VMXASSIST context switch!\n");
+ return -1;
+ }
+
+ load_vmcs_guest_state(info);
+
+ ((struct vmx_data *)info->vmm_data)->state = VMXASSIST_ENABLED;
+
+ PrintDebug("Loading vmxassist at RIP: 0x%p\n", (void *)info->rip);
+ return 0;
+ } else if (v3_vmx_handle_cr0_write(info, reg) != 0) {
+ PrintError("Could not handle CR0 Write\n");
+ return -1;
+ }
+
+ load_vmcs_guest_state(info);
+
+ PrintDebug("Leaving VMXASSIST and entering protected mode at RIP: 0x%p\n", (void *)info->rip);
+
return 0;
}
}
+
PrintError("Unhandled CR access\n");
return -1;
}
-int v3_handle_vmx_exit(struct v3_gprs * gprs, struct guest_info * info)
-{
+/* At this point the GPRs are already copied into the guest_info state */
+int v3_handle_vmx_exit(struct v3_gprs * gprs, struct guest_info * info) {
uint32_t exit_reason;
ulong_t exit_qual;
check_vmcs_read(VMCS_EXIT_REASON, &exit_reason);
check_vmcs_read(VMCS_EXIT_QUAL, &exit_qual);
- PrintDebug("VMX Exit taken, id-qual: %u-%lu\n", exit_reason, exit_qual);
+ // PrintDebug("VMX Exit taken, id-qual: %u-%lu\n", exit_reason, exit_qual);
/* Update guest state */
load_vmcs_guest_state(info);
- switch(exit_reason)
- {
- case VMEXIT_INFO_EXCEPTION_OR_NMI:
- {
- uint32_t int_info;
- pf_error_t error_code;
- check_vmcs_read(VMCS_EXIT_INT_INFO, &int_info);
- check_vmcs_read(VMCS_EXIT_INT_ERR, &error_code);
-
- if((uint8_t)int_info == 0x0e) {
- PrintDebug("Page Fault at %p\n", (void*)exit_qual);
- if(info->shdw_pg_mode == SHADOW_PAGING) {
- if(v3_handle_shadow_pagefault(info, (addr_t)exit_qual, error_code) == -1) {
- return -1;
- }
- } else {
- PrintError("Page fault in unimplemented paging mode\n");
- return -1;
- }
- } else {
- PrintDebug("Unknown exception: 0x%x\n", (uint8_t)int_info);
- v3_print_GPRs(info);
- return -1;
- }
- break;
- }
-
- case VMEXIT_IO_INSTR:
- {
- struct vmexit_io_qual * io_qual = (struct vmexit_io_qual *)&exit_qual;
-
- if(io_qual->dir == 0) {
- if(io_qual->string) {
- if(v3_handle_vmx_io_outs(info) == -1) {
- return -1;
- }
- } else {
- if(v3_handle_vmx_io_out(info) == -1) {
- return -1;
- }
- }
- } else {
- if(io_qual->string) {
- if(v3_handle_vmx_io_ins(info) == -1) {
- return -1;
- }
- } else {
- if(v3_handle_vmx_io_in(info) == -1) {
- return -1;
- }
- }
- }
- break;
- }
-
+ switch (exit_reason) {
+ case VMEXIT_INFO_EXCEPTION_OR_NMI: {
+ uint32_t int_info;
+ pf_error_t error_code;
+
+ check_vmcs_read(VMCS_EXIT_INT_INFO, &int_info);
+ check_vmcs_read(VMCS_EXIT_INT_ERR, &error_code);
+
+ // JRL: Change "0x0e" to a macro value
+ if ((uint8_t)int_info == 0x0e) {
+ PrintDebug("Page Fault at %p\n", (void *)exit_qual);
+
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ if (v3_handle_shadow_pagefault(info, (addr_t)exit_qual, error_code) == -1) {
+ PrintError("Error handling shadow page fault\n");
+ return -1;
+ }
+ } else {
+ PrintError("Page fault in unimplemented paging mode\n");
+ return -1;
+ }
+ } else {
+ PrintDebug("Unknown exception: 0x%x\n", (uint8_t)int_info);
+ v3_print_GPRs(info);
+ return -1;
+ }
+ break;
+ }
+
+ case VMEXIT_CPUID: {
+ int instr_len;
+
+ v3_cpuid(info->vm_regs.rax, (addr_t *)&(info->vm_regs.rax), (addr_t *)&(info->vm_regs.rbx),
+ (addr_t *)&(info->vm_regs.rcx), (addr_t *)&(info->vm_regs.rdx));
+
+ check_vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len);
+
+ info->rip += instr_len;
+ break;
+ }
+
+ case VMEXIT_IO_INSTR: {
+ struct vmexit_io_qual * io_qual = (struct vmexit_io_qual *)&exit_qual;
+
+ if (io_qual->dir == 0) {
+ if (io_qual->string) {
+ if (v3_handle_vmx_io_outs(info) == -1) {
+ PrintError("Error in outs IO handler\n");
+ return -1;
+ }
+ } else {
+ if (v3_handle_vmx_io_out(info) == -1) {
+ PrintError("Error in out IO handler\n");
+ return -1;
+ }
+ }
+ } else {
+ if (io_qual->string) {
+ if(v3_handle_vmx_io_ins(info) == -1) {
+ PrintError("Error in ins IO handler\n");
+ return -1;
+ }
+ } else {
+ if (v3_handle_vmx_io_in(info) == -1) {
+ PrintError("Error in in IO handler\n");
+ return -1;
+ }
+ }
+ }
+ break;
+ }
+
case VMEXIT_CR_REG_ACCESSES:
- if(handle_cr_access(info,exit_qual) != 0)
+ if (handle_cr_access(info,exit_qual) != 0) {
+ PrintError("Error handling CR access\n");
return -1;
+ }
+
break;
default:
- PrintError("Unhandled VMEXIT\n");
+ PrintError("Unhandled VMEXIT: %u (0x%x), %lu (0x%lx)\n", exit_reason, exit_reason, exit_qual, exit_qual);
return -1;
}
