On Thu, Jul 25, 2013 at 4:11 PM, Jan Kiszka <jan.kis...@web.de> wrote:
> On 2013-07-25 07:31, Arthur Chunqi Li wrote:
>> This is the first version of VMX nested environment. It contains the
>> basic VMX instructions test cases, including VMXON/VMXOFF/VMXPTRLD/
>> VMXPTRST/VMCLEAR/VMLAUNCH/VMRESUME/VMCALL. This patchalso tests the
>> basic execution routine in VMX nested environment andlet the VM print
>> "Hello World" to inform its successfully run.
>>
>> The first release also includes a test suite for vmenter (vmlaunch and
>> vmresume). Besides, hypercall mechanism is included and currently it is
>> used to invoke VM normal exit.
>>
>> New files added:
>> x86/vmx.h : contains all VMX related macro declerations
>> x86/vmx.c : main file for VMX nested test case
>>
>> Signed-off-by: Arthur Chunqi Li <yzt...@gmail.com>
>
> Don't forget to update your public git as well.
>
>> ---
>> config-x86-common.mak | 2 +
>> config-x86_64.mak | 1 +
>> lib/x86/msr.h | 5 +
>> x86/cstart64.S | 4 +
>> x86/unittests.cfg | 6 +
>> x86/vmx.c | 712
>> +++++++++++++++++++++++++++++++++++++++++++++++++
>> x86/vmx.h | 479 +++++++++++++++++++++++++++++++++
>> 7 files changed, 1209 insertions(+)
>> create mode 100644 x86/vmx.c
>> create mode 100644 x86/vmx.h
>>
>> diff --git a/config-x86-common.mak b/config-x86-common.mak
>> index 455032b..34a41e1 100644
>> --- a/config-x86-common.mak
>> +++ b/config-x86-common.mak
>> @@ -101,6 +101,8 @@ $(TEST_DIR)/asyncpf.elf: $(cstart.o)
>> $(TEST_DIR)/asyncpf.o
>>
>> $(TEST_DIR)/pcid.elf: $(cstart.o) $(TEST_DIR)/pcid.o
>>
>> +$(TEST_DIR)/vmx.elf: $(cstart.o) $(TEST_DIR)/vmx.o
>> +
>> arch_clean:
>> $(RM) $(TEST_DIR)/*.o $(TEST_DIR)/*.flat $(TEST_DIR)/*.elf \
>> $(TEST_DIR)/.*.d $(TEST_DIR)/lib/.*.d $(TEST_DIR)/lib/*.o
>> diff --git a/config-x86_64.mak b/config-x86_64.mak
>> index 4e525f5..bb8ee89 100644
>> --- a/config-x86_64.mak
>> +++ b/config-x86_64.mak
>> @@ -9,5 +9,6 @@ tests = $(TEST_DIR)/access.flat $(TEST_DIR)/apic.flat \
>> $(TEST_DIR)/xsave.flat $(TEST_DIR)/rmap_chain.flat \
>> $(TEST_DIR)/pcid.flat
>> tests += $(TEST_DIR)/svm.flat
>> +tests += $(TEST_DIR)/vmx.flat
>>
>> include config-x86-common.mak
>> diff --git a/lib/x86/msr.h b/lib/x86/msr.h
>> index 509a421..281255a 100644
>> --- a/lib/x86/msr.h
>> +++ b/lib/x86/msr.h
>> @@ -396,6 +396,11 @@
>> #define MSR_IA32_VMX_VMCS_ENUM 0x0000048a
>> #define MSR_IA32_VMX_PROCBASED_CTLS2 0x0000048b
>> #define MSR_IA32_VMX_EPT_VPID_CAP 0x0000048c
>> +#define MSR_IA32_VMX_TRUE_PIN 0x0000048d
>> +#define MSR_IA32_VMX_TRUE_PROC 0x0000048e
>> +#define MSR_IA32_VMX_TRUE_EXIT 0x0000048f
>> +#define MSR_IA32_VMX_TRUE_ENTRY 0x00000490
>> +
>>
>> /* AMD-V MSRs */
>>
>> diff --git a/x86/cstart64.S b/x86/cstart64.S
>> index 24df5f8..0fe76da 100644
>> --- a/x86/cstart64.S
>> +++ b/x86/cstart64.S
>> @@ -4,6 +4,10 @@
>> .globl boot_idt
>> boot_idt = 0
>>
>> +.globl idt_descr
>> +.globl tss_descr
>> +.globl gdt64_desc
>> +
>> ipi_vector = 0x20
>>
>> max_cpus = 64
>> diff --git a/x86/unittests.cfg b/x86/unittests.cfg
>> index bc9643e..85c36aa 100644
>> --- a/x86/unittests.cfg
>> +++ b/x86/unittests.cfg
>> @@ -149,3 +149,9 @@ extra_params = --append "10000000 `date +%s`"
>> file = pcid.flat
>> extra_params = -cpu qemu64,+pcid
>> arch = x86_64
>> +
>> +[vmx]
>> +file = vmx.flat
>> +extra_params = -cpu host,+vmx
>> +arch = x86_64
>> +
>> diff --git a/x86/vmx.c b/x86/vmx.c
>> new file mode 100644
>> index 0000000..ca3e117
>> --- /dev/null
>> +++ b/x86/vmx.c
>> @@ -0,0 +1,712 @@
>> +#include "libcflat.h"
>> +#include "processor.h"
>> +#include "vm.h"
>> +#include "desc.h"
>> +#include "vmx.h"
>> +#include "msr.h"
>> +#include "smp.h"
>> +#include "io.h"
>> +
>> +int fails = 0, tests = 0;
>> +u32 *vmxon_region;
>> +struct vmcs *vmcs_root;
>> +u32 vpid_cnt;
>> +void *guest_stack, *guest_syscall_stack;
>> +u32 ctrl_pin, ctrl_enter, ctrl_exit, ctrl_cpu[2];
>> +ulong fix_cr0_set, fix_cr0_clr;
>> +ulong fix_cr4_set, fix_cr4_clr;
>> +struct regs regs;
>> +struct vmx_test *current;
>> +u64 hypercall_field = 0;
>> +bool launched = 0;
>> +
>> +extern u64 gdt64_desc[];
>> +extern u64 idt_descr[];
>> +extern u64 tss_descr[];
>> +extern void *vmx_return;
>> +extern void *entry_sysenter;
>> +extern void *guest_entry;
>> +
>> +static void report(const char *name, int result)
>> +{
>> + ++tests;
>> + if (result)
>> + printf("PASS: %s\n", name);
>> + else {
>> + printf("FAIL: %s\n", name);
>> + ++fails;
>> + }
>> +}
>> +
>> +static int vmcs_clear(struct vmcs *vmcs)
>> +{
>> + bool ret;
>> + asm volatile ("vmclear %1; setbe %0" : "=q" (ret) : "m" (vmcs) : "cc");
>> + return ret;
>> +}
>> +
>> +static u64 vmcs_read(enum Encoding enc)
>> +{
>> + u64 val;
>> + asm volatile ("vmread %1, %0" : "=rm" (val) : "r" ((u64)enc) : "cc");
>> + return val;
>> +}
>> +
>> +static int vmcs_write(enum Encoding enc, u64 val)
>> +{
>> + bool ret;
>> + asm volatile ("vmwrite %1, %2; setbe %0"
>> + : "=q"(ret) : "rm" (val), "r" ((u64)enc) : "cc");
>> + return ret;
>> +}
>> +
>> +static int make_vmcs_current(struct vmcs *vmcs)
>> +{
>> + bool ret;
>> +
>> + asm volatile ("vmptrld %1; setbe %0" : "=q" (ret) : "m" (vmcs) : "cc");
>> + return ret;
>> +}
>> +
>> +static int save_vmcs(struct vmcs **vmcs)
>> +{
>> + bool ret;
>> +
>> + asm volatile ("vmptrst %1; setbe %0" : "=q" (ret) : "m" (*vmcs) :
>> "cc");
>> + return ret;
>> +}
>> +
>> +/* entry_sysenter */
>> +asm(
>> + ".align 4, 0x90\n\t"
>> + ".globl entry_sysenter\n\t"
>> + "entry_sysenter:\n\t"
>> + SAVE_GPR
>> + " and $0xf, %rax\n\t"
>> + " mov %rax, %rdi\n\t"
>> + " call syscall_handler\n\t"
>> + LOAD_GPR
>> + " vmresume\n\t"
>> +);
>> +
>> +static void __attribute__((__used__)) syscall_handler(u64 syscall_no)
>> +{
>> + current->syscall_handler(syscall_no);
>> +}
>> +
>> +static inline int vmx_on()
>> +{
>> + bool ret;
>> + asm volatile ("vmxon %1; setbe %0\n\t"
>> + : "=q"(ret) : "m"(vmxon_region) : "cc");
>> + return ret;
>> +}
>> +
>> +static inline int vmx_off()
>> +{
>> + bool ret;
>> + asm volatile("vmxoff; setbe %0\n\t"
>> + : "=q"(ret) : : "cc");
>> + return ret;
>> +}
>> +
>> +static void print_vmexit_info()
>> +{
>> + u64 guest_rip, guest_rsp;
>> + ulong reason = vmcs_read(EXI_REASON) & 0xff;
>> + ulong exit_qual = vmcs_read(EXI_QUALIFICATION);
>> + guest_rip = vmcs_read(GUEST_RIP);
>> + guest_rsp = vmcs_read(GUEST_RSP);
>> + printf("VMEXIT info:\n");
>> + printf("\tvmexit reason = %d\n", reason);
>> + printf("\texit qualification = 0x%x\n", exit_qual);
>> + printf("\tBit 31 of reason = %x\n", (vmcs_read(EXI_REASON) >> 31) & 1);
>> + printf("\tguest_rip = 0x%llx\n", guest_rip);
>> + printf("\tRAX=0x%llx RBX=0x%llx RCX=0x%llx RDX=0x%llx\n",
>> + regs.rax, regs.rbx, regs.rcx, regs.rdx);
>> + printf("\tRSP=0x%llx RBP=0x%llx RSI=0x%llx RDI=0x%llx\n",
>> + guest_rsp, regs.rbp, regs.rsi, regs.rdi);
>> + printf("\tR8 =0x%llx R9 =0x%llx R10=0x%llx R11=0x%llx\n",
>> + regs.r8, regs.r9, regs.r10, regs.r11);
>> + printf("\tR12=0x%llx R13=0x%llx R14=0x%llx R15=0x%llx\n",
>> + regs.r12, regs.r13, regs.r14, regs.r15);
>> +}
>> +
>> +static void test_vmclear(void)
>> +{
>> + u64 rflags;
>> +
>> + rflags = get_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
>> + set_rflags(rflags);
>> + report("test vmclear", vmcs_clear(vmcs_root) == 0);
>> +}
>> +
>> +static void test_vmxoff(void)
>> +{
>> + int ret;
>> + u64 rflags;
>> +
>> + rflags = get_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
>> + set_rflags(rflags);
>> + ret = vmx_off();
>> + report("test vmxoff", !ret);
>> +}
>> +
>> +static void __attribute__((__used__)) guest_main(void)
>> +{
>> + current->guest_main();
>> +}
>> +
>> +/* guest_entry */
>> +asm(
>> + ".align 4, 0x90\n\t"
>> + ".globl entry_guest\n\t"
>> + "guest_entry:\n\t"
>> + " call guest_main\n\t"
>> + " mov $1, %edi\n\t"
>> + " call hypercall\n\t"
>> +);
>> +
>> +static void init_vmcs_ctrl(void)
>> +{
>> + /* 26.2 CHECKS ON VMX CONTROLS AND HOST-STATE AREA */
>> + /* 26.2.1.1 */
>> + vmcs_write(PIN_CONTROLS, ctrl_pin);
>> + /* Disable VMEXIT of IO instruction */
>> + vmcs_write(CPU_EXEC_CTRL0, ctrl_cpu[0]);
>> + if (ctrl_cpu_rev[0].set & CPU_SECONDARY) {
>> + ctrl_cpu[1] |= ctrl_cpu_rev[1].set & ctrl_cpu_rev[1].clr;
>> + vmcs_write(CPU_EXEC_CTRL1, ctrl_cpu[1]);
>> + }
>> + vmcs_write(CR3_TARGET_COUNT, 0);
>> + vmcs_write(VPID, ++vpid_cnt);
>> +}
>> +
>> +static void init_vmcs_host(void)
>> +{
>> + /* 26.2 CHECKS ON VMX CONTROLS AND HOST-STATE AREA */
>> + /* 26.2.1.2 */
>> + vmcs_write(HOST_EFER, rdmsr(MSR_EFER));
>> +
>> + /* 26.2.1.3 */
>> + vmcs_write(ENT_CONTROLS, ctrl_enter);
>> + vmcs_write(EXI_CONTROLS, ctrl_exit);
>> +
>> + /* 26.2.2 */
>> + vmcs_write(HOST_CR0, read_cr0());
>> + vmcs_write(HOST_CR3, read_cr3());
>> + vmcs_write(HOST_CR4, read_cr4());
>> + vmcs_write(HOST_SYSENTER_EIP, (u64)(&entry_sysenter));
>> + vmcs_write(HOST_SYSENTER_CS, SEL_KERN_CODE_64);
>> +
>> + /* 26.2.3 */
>> + vmcs_write(HOST_SEL_CS, SEL_KERN_CODE_64);
>> + vmcs_write(HOST_SEL_SS, SEL_KERN_DATA_64);
>> + vmcs_write(HOST_SEL_DS, SEL_KERN_DATA_64);
>> + vmcs_write(HOST_SEL_ES, SEL_KERN_DATA_64);
>> + vmcs_write(HOST_SEL_FS, SEL_KERN_DATA_64);
>> + vmcs_write(HOST_SEL_GS, SEL_KERN_DATA_64);
>> + vmcs_write(HOST_SEL_TR, SEL_TSS_RUN);
>> + vmcs_write(HOST_BASE_TR, (u64)tss_descr);
>> + vmcs_write(HOST_BASE_GDTR, (u64)gdt64_desc);
>> + vmcs_write(HOST_BASE_IDTR, (u64)idt_descr);
>> + vmcs_write(HOST_BASE_FS, 0);
>> + vmcs_write(HOST_BASE_GS, 0);
>> +
>> + /* Set other vmcs area */
>> + vmcs_write(PF_ERROR_MASK, 0);
>> + vmcs_write(PF_ERROR_MATCH, 0);
>> + vmcs_write(VMCS_LINK_PTR, ~0ul);
>> + vmcs_write(VMCS_LINK_PTR_HI, ~0ul);
>> + vmcs_write(HOST_RIP, (u64)(&vmx_return));
>> +}
>> +
>> +static void init_vmcs_guest(void)
>> +{
>> + /* 26.3 CHECKING AND LOADING GUEST STATE */
>> + ulong guest_cr0, guest_cr4, guest_cr3;
>> + /* 26.3.1.1 */
>> + guest_cr0 = read_cr0();
>> + guest_cr4 = read_cr4();
>> + guest_cr3 = read_cr3();
>> + if (ctrl_enter & ENT_GUEST_64) {
>> + guest_cr0 |= CR0_PG;
>> + guest_cr4 |= CR4_PAE;
>> + }
>> + if ((ctrl_enter & ENT_GUEST_64) == 0)
>> + guest_cr4 &= (~CR4_PCIDE);
>> + if (guest_cr0 & CR0_PG)
>> + guest_cr0 |= CR0_PE;
>> + vmcs_write(GUEST_CR0, guest_cr0);
>> + vmcs_write(GUEST_CR3, guest_cr3);
>> + vmcs_write(GUEST_CR4, guest_cr4);
>> + vmcs_write(GUEST_SYSENTER_CS, SEL_KERN_CODE_64);
>> + vmcs_write(GUEST_SYSENTER_ESP,
>> + (u64)(guest_syscall_stack + PAGE_SIZE - 1));
>> + vmcs_write(GUEST_SYSENTER_EIP, (u64)(&entry_sysenter));
>> + vmcs_write(GUEST_DR7, 0);
>> + vmcs_write(GUEST_EFER, rdmsr(MSR_EFER));
>> +
>> + /* 26.3.1.2 */
>> + vmcs_write(GUEST_SEL_CS, SEL_KERN_CODE_64);
>> + vmcs_write(GUEST_SEL_SS, SEL_KERN_DATA_64);
>> + vmcs_write(GUEST_SEL_DS, SEL_KERN_DATA_64);
>> + vmcs_write(GUEST_SEL_ES, SEL_KERN_DATA_64);
>> + vmcs_write(GUEST_SEL_FS, SEL_KERN_DATA_64);
>> + vmcs_write(GUEST_SEL_GS, SEL_KERN_DATA_64);
>> + vmcs_write(GUEST_SEL_TR, SEL_TSS_RUN);
>> + vmcs_write(GUEST_SEL_LDTR, 0);
>> +
>> + vmcs_write(GUEST_BASE_CS, 0);
>> + vmcs_write(GUEST_BASE_ES, 0);
>> + vmcs_write(GUEST_BASE_SS, 0);
>> + vmcs_write(GUEST_BASE_DS, 0);
>> + vmcs_write(GUEST_BASE_FS, 0);
>> + vmcs_write(GUEST_BASE_GS, 0);
>> + vmcs_write(GUEST_BASE_TR, (u64)tss_descr);
>> + vmcs_write(GUEST_BASE_LDTR, 0);
>> +
>> + vmcs_write(GUEST_LIMIT_CS, 0xFFFFFFFF);
>> + vmcs_write(GUEST_LIMIT_DS, 0xFFFFFFFF);
>> + vmcs_write(GUEST_LIMIT_ES, 0xFFFFFFFF);
>> + vmcs_write(GUEST_LIMIT_SS, 0xFFFFFFFF);
>> + vmcs_write(GUEST_LIMIT_FS, 0xFFFFFFFF);
>> + vmcs_write(GUEST_LIMIT_GS, 0xFFFFFFFF);
>> + vmcs_write(GUEST_LIMIT_LDTR, 0xffff);
>> + vmcs_write(GUEST_LIMIT_TR, ((struct descr *)tss_descr)->limit);
>> +
>> + vmcs_write(GUEST_AR_CS, 0xa09b);
>> + vmcs_write(GUEST_AR_DS, 0xc093);
>> + vmcs_write(GUEST_AR_ES, 0xc093);
>> + vmcs_write(GUEST_AR_FS, 0xc093);
>> + vmcs_write(GUEST_AR_GS, 0xc093);
>> + vmcs_write(GUEST_AR_SS, 0xc093);
>> + vmcs_write(GUEST_AR_LDTR, 0x82);
>> + vmcs_write(GUEST_AR_TR, 0x8b);
>> +
>> + /* 26.3.1.3 */
>> + vmcs_write(GUEST_BASE_GDTR, (u64)gdt64_desc);
>> + vmcs_write(GUEST_BASE_IDTR, (u64)idt_descr);
>> + vmcs_write(GUEST_LIMIT_GDTR,
>> + ((struct descr *)gdt64_desc)->limit & 0xffff);
>> + vmcs_write(GUEST_LIMIT_IDTR,
>> + ((struct descr *)idt_descr)->limit & 0xffff);
>> +
>> + /* 26.3.1.4 */
>> + vmcs_write(GUEST_RIP, (u64)(&guest_entry));
>> + vmcs_write(GUEST_RSP, (u64)(guest_stack + PAGE_SIZE - 1));
>> + vmcs_write(GUEST_RFLAGS, 0x2);
>> +
>> + /* 26.3.1.5 */
>> + vmcs_write(GUEST_ACTV_STATE, 0);
>> + vmcs_write(GUEST_INTR_STATE, 0);
>> +}
>> +
>> +static int init_vmcs(struct vmcs **vmcs)
>> +{
>> + *vmcs = alloc_page();
>> + memset(*vmcs, 0, PAGE_SIZE);
>> + (*vmcs)->revision_id = basic.revision;
>> + /* vmclear first to init vmcs */
>> + if (vmcs_clear(*vmcs)) {
>> + printf("%s : vmcs_clear error\n", __func__);
>> + return 1;
>> + }
>> +
>> + if (make_vmcs_current(*vmcs)) {
>> + printf("%s : make_vmcs_current error\n", __func__);
>> + return 1;
>> + }
>> +
>> + /* All settings to pin/exit/enter/cpu
>> + control fields should be placed here */
>> + ctrl_pin |= PIN_EXTINT | PIN_NMI | PIN_VIRT_NMI;
>> + ctrl_exit = EXI_LOAD_EFER | EXI_HOST_64;
>> + ctrl_enter = (ENT_LOAD_EFER | ENT_GUEST_64);
>> + ctrl_cpu[0] |= CPU_HLT;
>> + /* DIsable IO instruction VMEXIT now */
>> + ctrl_cpu[0] &= (~(CPU_IO | CPU_IO_BITMAP));
>> + ctrl_cpu[1] = 0;
>> +
>> + ctrl_pin = (ctrl_pin | ctrl_pin_rev.set) & ctrl_pin_rev.clr;
>> + ctrl_enter = (ctrl_enter | ctrl_enter_rev.set) & ctrl_enter_rev.clr;
>> + ctrl_exit = (ctrl_exit | ctrl_exit_rev.set) & ctrl_exit_rev.clr;
>> + ctrl_cpu[0] = (ctrl_cpu[0] | ctrl_cpu_rev[0].set) &
>> ctrl_cpu_rev[0].clr;
>> +
>> + init_vmcs_ctrl();
>> + init_vmcs_host();
>> + init_vmcs_guest();
>> + return 0;
>> +}
>> +
>> +static void init_vmx(void)
>> +{
>> + vmxon_region = alloc_page();
>> + memset(vmxon_region, 0, PAGE_SIZE);
>> +
>> + fix_cr0_set = rdmsr(MSR_IA32_VMX_CR0_FIXED0);
>> + fix_cr0_clr = rdmsr(MSR_IA32_VMX_CR0_FIXED1);
>> + fix_cr4_set = rdmsr(MSR_IA32_VMX_CR4_FIXED0);
>> + fix_cr4_clr = rdmsr(MSR_IA32_VMX_CR4_FIXED1);
>> + basic.val = rdmsr(MSR_IA32_VMX_BASIC);
>> + ctrl_pin_rev.val = rdmsr(basic.ctrl ? MSR_IA32_VMX_TRUE_PIN
>> + : MSR_IA32_VMX_PINBASED_CTLS);
>> + ctrl_exit_rev.val = rdmsr(basic.ctrl ? MSR_IA32_VMX_TRUE_EXIT
>> + : MSR_IA32_VMX_EXIT_CTLS);
>> + ctrl_enter_rev.val = rdmsr(basic.ctrl ? MSR_IA32_VMX_TRUE_ENTRY
>> + : MSR_IA32_VMX_ENTRY_CTLS);
>> + ctrl_cpu_rev[0].val = rdmsr(basic.ctrl ? MSR_IA32_VMX_TRUE_PROC
>> + : MSR_IA32_VMX_PROCBASED_CTLS);
>> + if (ctrl_cpu_rev[0].set & CPU_SECONDARY)
>> + ctrl_cpu_rev[1].val = rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2);
>> + if (ctrl_cpu_rev[1].set & CPU_EPT || ctrl_cpu_rev[1].set & CPU_VPID)
>> + ept_vpid.val = rdmsr(MSR_IA32_VMX_EPT_VPID_CAP);
>> +
>> + write_cr0((read_cr0() & fix_cr0_clr) | fix_cr0_set);
>> + write_cr4((read_cr4() & fix_cr4_clr) | fix_cr4_set | CR4_VMXE);
>> +
>> + *vmxon_region = basic.revision;
>> +
>> + guest_stack = alloc_page();
>> + memset(guest_stack, 0, PAGE_SIZE);
>> + guest_syscall_stack = alloc_page();
>> + memset(guest_syscall_stack, 0, PAGE_SIZE);
>> +}
>> +
>> +static int test_vmx_capability(void)
>> +{
>> + struct cpuid r;
>> + u64 ret1, ret2;
>> + u64 ia32_feature_control;
>> + r = cpuid(1);
>> + ret1 = ((r.c) >> 5) & 1;
>> + ia32_feature_control = rdmsr(MSR_IA32_FEATURE_CONTROL);
>> + ret2 = ((ia32_feature_control & 0x5) == 0x5);
>> + if ((!ret2) && ((ia32_feature_control & 0x1) == 0)) {
>> + wrmsr(MSR_IA32_FEATURE_CONTROL, 0x5);
>> + ia32_feature_control = rdmsr(MSR_IA32_FEATURE_CONTROL);
>> + ret2 = ((ia32_feature_control & 0x5) == 0x5);
>> + }
>> + report("test vmx capability", ret1 & ret2);
>> + return !(ret1 & ret2);
>> +}
>> +
>> +static int test_vmxon(void)
>> +{
>> + int ret;
>> + u64 rflags;
>> +
>> + rflags = get_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
>> + set_rflags(rflags);
>> + ret = vmx_on();
>> + report("test vmxon", !ret);
>> + return ret;
>> +}
>> +
>> +static void test_vmptrld(void)
>> +{
>> + u64 rflags;
>> + struct vmcs *vmcs;
>> +
>> + vmcs = alloc_page();
>> + vmcs->revision_id = basic.revision;
>> + rflags = get_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
>> + set_rflags(rflags);
>> + report("test vmptrld", make_vmcs_current(vmcs) == 0);
>> +}
>> +
>> +static void test_vmptrst(void)
>> +{
>> + u64 rflags;
>> + int ret;
>> + struct vmcs *vmcs1, *vmcs2;
>> +
>> + vmcs1 = alloc_page();
>> + memset(vmcs1, 0, PAGE_SIZE);
>> + init_vmcs(&vmcs1);
>> + rflags = get_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
>> + set_rflags(rflags);
>> + ret = save_vmcs(&vmcs2);
>> + report("test vmptrst", (!ret) && (vmcs1 == vmcs2));
>> +}
>> +
>> +/* This function can only be called in guest */
>> +static void __attribute__((__used__)) hypercall(u32 hypercall_no)
>> +{
>> + u64 val = 0;
>> + val = (hypercall_no & HYPERCALL_MASK) | HYPERCALL_BIT;
>> + hypercall_field = val;
>> + asm volatile("vmcall\n\t");
>> +}
>> +
>> +static bool is_hypercall()
>> +{
>> + ulong reason, hyper_bit;
>> +
>> + reason = vmcs_read(EXI_REASON) & 0xff;
>> + hyper_bit = hypercall_field & HYPERCALL_BIT;
>> + if (reason == VMX_VMCALL && hyper_bit)
>> + return true;
>> + return false;
>> +}
>> +
>> +static int handle_hypercall()
>> +{
>> + ulong hypercall_no;
>> +
>> + hypercall_no = hypercall_field & HYPERCALL_MASK;
>> + hypercall_field = 0;
>> + switch (hypercall_no) {
>> + case HYPERCALL_VMEXIT:
>> + return VMX_TEST_VMEXIT;
>> + default:
>> + printf("ERROR : Invalid hypercall number : %d\n",
>> hypercall_no);
>> + }
>> + return VMX_TEST_EXIT;
>> +}
>> +
>> +static int __attribute__((__used__)) exit_handler()
>> +{
>> + int ret;
>> +
>> + current->exits++;
>> + current->guest_regs = regs;
>> + if (is_hypercall())
>> + ret = handle_hypercall();
>> + else
>> + ret = current->exit_handler();
>> + regs = current->guest_regs;
>> + switch (ret) {
>> + case VMX_TEST_VMEXIT:
>> + case VMX_TEST_RESUME:
>> + return ret;
>> + case VMX_TEST_EXIT:
>> + break;
>> + default:
>> + printf("ERROR : Invalid exit_handler return val %d.\n"
>> + , ret);
>> + }
>> + print_vmexit_info();
>> + exit(-1);
>> + return 0;
>> +}
>> +
>> +static int vmx_run()
>> +{
>> + u32 ret = 0;
>> + u64 rflags = 0;
>
> I would optionally return the flags to the caller to check for specific
> results there (consider you injected a vmlaunch/resume failure
> intentionally). But that can also be done once a user is there.
This can be easily solved by adding a variant "u64 rflags" to "struct
regs" and save and restore it before and after vmlaunch/resume. This
is for host rflags, and if user want to get guest rflags he can use
vmcs_read(GUEST_RFLAGS).
>
>> +
>> + asm volatile(
>> + "mov %%rsp, %%rsi\n\t"
>> + "mov %3, %%edi\n\t"
>> + "call vmcs_write\n\t"
>> +
>> + "0: "
>> + LOAD_GPR_C
>> + "cmpl $0, %1\n\t"
>> + "jne 1f\n\t"
>> + "vmlaunch\n\t"
>> + "pushf\n\t"
>> + "pop %2\n\t"
>> + /* vmlaunch error, return VMX_TEST_LAUNCH_ERR */
>> + "movl %4, %0\n\t"
>> + SAVE_GPR_C
>> + "jmp 2f\n\t"
>> + "1: "
>> + "vmresume\n\t"
>> + "pushf\n\t"
>> + "pop %2\n\t"
>> + /* vmresume error, return VMX_TEST_RESUME_ERR */
>> + "movl %5, %0\n\t"
>> + SAVE_GPR_C
>> + "jmp 2f\n\t"
>> +
>> + "vmx_return:\n\t"
>> + SAVE_GPR_C
>> + "call exit_handler\n\t"
>> + /* set launched = 1 */
>> + "movl $0x1, %1\n\t"
>> + /* jump to resume when VMX_TEST_RESUME */
>> + "cmp %6, %%eax\n\t"
>> + "je 0b\n\t"
>> + "mov %%eax, %0\n\t"
>> + "2: "
>> + : "=m"(ret), "=m"(launched), "=m"(rflags)
>> + : "i"(HOST_RSP), "i"(VMX_TEST_LAUNCH_ERR),
>> + "i"(VMX_TEST_RESUME_ERR), "i"(VMX_TEST_RESUME)
>> + : "rax", "rbx", "rdi", "rsi",
>> + "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
>> + "memory", "cc"
>> + );
>> + launched = 0;
>> + switch (ret) {
>> + case VMX_TEST_VMEXIT:
>> + return 0;
>> + case VMX_TEST_LAUNCH_ERR:
>> + printf("%s : vmlaunch failed.\n", __func__);
>> + if ((!(rflags & X86_EFLAGS_CF) && !(rflags & X86_EFLAGS_ZF))
>> + || ((rflags & X86_EFLAGS_CF) && (rflags &
>> X86_EFLAGS_ZF)))
>> + printf("\tvmlaunch set wrong flags\n");
>> + report("test vmlaunch", 0);
>> + break;
>> + case VMX_TEST_RESUME_ERR:
>> + printf("%s : vmresume failed.\n", __func__);
>> + if ((!(rflags & X86_EFLAGS_CF) && !(rflags & X86_EFLAGS_ZF))
>> + || ((rflags & X86_EFLAGS_CF) && (rflags &
>> X86_EFLAGS_ZF)))
>> + printf("\tvmresume set wrong flags\n");
>> + report("test vmresume", 0);
>> + break;
>> + default:
>> + printf("%s : unhandled ret from exit_handler, ret=%d.\n",
>> __func__, ret);
>> + break;
>> + }
>> + return 1;
>> +}
>> +
>> +static int test_run(struct vmx_test *test)
>> +{
>> + if (test->name == NULL)
>> + test->name = "(no name)";
>> + if (vmx_on()) {
>> + printf("%s : vmxon failed.\n", __func__);
>> + return 1;
>> + }
>> + init_vmcs(&(test->vmcs));
>> + /* Directly call test->init is ok here, init_vmcs has done
>> + vmcs init, vmclear and vmptrld*/
>> + if (test->init)
>> + test->init(test->vmcs);
>> + test->exits = 0;
>> + current = test;
>> + regs = test->guest_regs;
>> + launched = 0;
>> + printf("\nTest suite : %s\n", test->name);
>> + vmx_run();
>> + if (vmx_off()) {
>> + printf("%s : vmxoff failed.\n", __func__);
>> + return 1;
>> + }
>> + return 0;
>> +}
>> +
>> +static void basic_init()
>> +{
>> +}
>> +
>> +static void basic_guest_main()
>> +{
>> + /* Here is null guest_main, print Hello World */
>> + printf("\tHello World, this is null_guest_main!\n");
>> +}
>> +
>> +static int basic_exit_handler()
>> +{
>> + u64 guest_rip;
>> + ulong reason;
>> +
>> + guest_rip = vmcs_read(GUEST_RIP);
>> + reason = vmcs_read(EXI_REASON) & 0xff;
>> +
>> + switch (reason) {
>> + case VMX_VMCALL:
>> + print_vmexit_info();
>> + vmcs_write(GUEST_RIP, guest_rip + 3);
>> + return VMX_TEST_RESUME;
>> + default:
>> + break;
>> + }
>> + printf("ERROR : Unhandled vmx exit.\n");
>> + print_vmexit_info();
>> + return VMX_TEST_EXIT;
>> +}
>> +
>> +static void basic_syscall_handler(u64 syscall_no)
>> +{
>> +}
>> +
>> +static void vmenter_main()
>> +{
>> + u64 rax;
>> + u64 rsp, resume_rsp;
>> +
>> + report("test vmlaunch", 1);
>> +
>> + asm volatile(
>> + "mov %%rsp, %0\n\t"
>> + "mov %3, %%rax\n\t"
>> + "vmcall\n\t"
>> + "mov %%rax, %1\n\t"
>> + "mov %%rsp, %2\n\t"
>> + : "=r"(rsp), "=r"(rax), "=r"(resume_rsp)
>> + : "g"(0xABCD));
>> + report("test vmresume", (rax == 0xFFFF) && (rsp == resume_rsp));
>> +}
>> +
>> +static int vmenter_exit_handler()
>> +{
>> + u64 guest_rip;
>> + ulong reason;
>> +
>> + guest_rip = vmcs_read(GUEST_RIP);
>> + reason = vmcs_read(EXI_REASON) & 0xff;
>> + switch (reason) {
>> + case VMX_VMCALL:
>> + if (current->guest_regs.rax != 0xABCD) {
>> + report("test vmresume", 0);
>> + return VMX_TEST_VMEXIT;
>> + }
>> + current->guest_regs.rax = 0xFFFF;
>> + vmcs_write(GUEST_RIP, guest_rip + 3);
>> + return VMX_TEST_RESUME;
>> + default:
>> + report("test vmresume", 0);
>> + print_vmexit_info();
>> + }
>> + return VMX_TEST_VMEXIT;
>> +}
>> +
>> +
>> +/* name/init/guest_main/exit_handler/syscall_handler/guest_regs
>> + basic_* just implement some basic functions */
>> +static struct vmx_test vmx_tests[] = {
>> + { "null", basic_init, basic_guest_main, basic_exit_handler,
>> + basic_syscall_handler, {0} },
>> + { "vmenter", basic_init, vmenter_main, vmenter_exit_handler,
>> + basic_syscall_handler, {0} },
>> +};
>> +
>> +int main(void)
>> +{
>> + int i;
>> +
>> + setup_vm();
>> + setup_idt();
>> +
>> + if (test_vmx_capability() != 0) {
>> + printf("ERROR : vmx not supported, check +vmx option\n");
>> + goto exit;
>> + }
>> + init_vmx();
>> + /* Set basic test ctxt the same as "null" */
>> + current = &vmx_tests[0];
>> + if (test_vmxon() != 0)
>> + goto exit;
>> + test_vmptrld();
>> + test_vmclear();
>> + test_vmptrst();
>> + init_vmcs(&vmcs_root);
>> + if (vmx_run()) {
>> + report("test vmlaunch", 0);
>> + goto exit;
>> + }
>> + test_vmxoff();
>> +
>> + for (i = 1; i < ARRAY_SIZE(vmx_tests); ++i) {
>> + if (test_run(&vmx_tests[i]))
>> + goto exit;
>> + }
>> +
>> +exit:
>> + printf("\nSUMMARY: %d tests, %d failures\n", tests, fails);
>> + return fails ? 1 : 0;
>> +}
>> diff --git a/x86/vmx.h b/x86/vmx.h
>> new file mode 100644
>> index 0000000..a0f08ef
>> --- /dev/null
>> +++ b/x86/vmx.h
>> @@ -0,0 +1,479 @@
>> +#ifndef __HYPERVISOR_H
>> +#define __HYPERVISOR_H
>> +
>> +#include "libcflat.h"
>> +
>> +struct vmcs {
>> + u32 revision_id; /* vmcs revision identifier */
>> + u32 abort; /* VMX-abort indicator */
>> + /* VMCS data */
>> + char data[0];
>> +};
>> +
>> +struct regs {
>> + u64 rax;
>> + u64 rcx;
>> + u64 rdx;
>> + u64 rbx;
>> + u64 cr2;
>> + u64 rbp;
>> + u64 rsi;
>> + u64 rdi;
>> + u64 r8;
>> + u64 r9;
>> + u64 r10;
>> + u64 r11;
>> + u64 r12;
>> + u64 r13;
>> + u64 r14;
>> + u64 r15;
>> +};
>> +
>> +struct vmx_test {
>> + const char *name;
>> + void (*init)(struct vmcs *vmcs);
>> + void (*guest_main)();
>> + int (*exit_handler)();
>> + void (*syscall_handler)(u64 syscall_no);
>> + struct regs guest_regs;
>> + struct vmcs *vmcs;
>> + int exits;
>> +};
>> +
>> +static union vmx_basic {
>> + u64 val;
>> + struct {
>> + u32 revision;
>> + u32 size:13,
>> + : 3,
>> + width:1,
>> + dual:1,
>> + type:4,
>> + insouts:1,
>> + ctrl:1;
>> + };
>> +} basic;
>> +
>> +static union vmx_ctrl_pin {
>> + u64 val;
>> + struct {
>> + u32 set, clr;
>> + };
>> +} ctrl_pin_rev;
>> +
>> +static union vmx_ctrl_cpu {
>> + u64 val;
>> + struct {
>> + u32 set, clr;
>> + };
>> +} ctrl_cpu_rev[2];
>> +
>> +static union vmx_ctrl_exit {
>> + u64 val;
>> + struct {
>> + u32 set, clr;
>> + };
>> +} ctrl_exit_rev;
>> +
>> +static union vmx_ctrl_ent {
>> + u64 val;
>> + struct {
>> + u32 set, clr;
>> + };
>> +} ctrl_enter_rev;
>> +
>> +static union vmx_ept_vpid {
>> + u64 val;
>> + struct {
>> + u32:16,
>> + super:2,
>> + : 2,
>> + invept:1,
>> + : 11;
>> + u32 invvpid:1;
>> + };
>> +} ept_vpid;
>> +
>> +struct descr {
>> + u16 limit;
>> + u64 addr;
>> +};
>> +
>> +enum Encoding {
>> + /* 16-Bit Control Fields */
>> + VPID = 0x0000ul,
>> + /* Posted-interrupt notification vector */
>> + PINV = 0x0002ul,
>> + /* EPTP index */
>> + EPTP_IDX = 0x0004ul,
>> +
>> + /* 16-Bit Guest State Fields */
>> + GUEST_SEL_ES = 0x0800ul,
>> + GUEST_SEL_CS = 0x0802ul,
>> + GUEST_SEL_SS = 0x0804ul,
>> + GUEST_SEL_DS = 0x0806ul,
>> + GUEST_SEL_FS = 0x0808ul,
>> + GUEST_SEL_GS = 0x080aul,
>> + GUEST_SEL_LDTR = 0x080cul,
>> + GUEST_SEL_TR = 0x080eul,
>> + GUEST_INT_STATUS = 0x0810ul,
>> +
>> + /* 16-Bit Host State Fields */
>> + HOST_SEL_ES = 0x0c00ul,
>> + HOST_SEL_CS = 0x0c02ul,
>> + HOST_SEL_SS = 0x0c04ul,
>> + HOST_SEL_DS = 0x0c06ul,
>> + HOST_SEL_FS = 0x0c08ul,
>> + HOST_SEL_GS = 0x0c0aul,
>> + HOST_SEL_TR = 0x0c0cul,
>> +
>> + /* 64-Bit Control Fields */
>> + IO_BITMAP_A = 0x2000ul,
>> + IO_BITMAP_B = 0x2002ul,
>> + MSR_BITMAP = 0x2004ul,
>> + EXIT_MSR_ST_ADDR = 0x2006ul,
>> + EXIT_MSR_LD_ADDR = 0x2008ul,
>> + ENTER_MSR_LD_ADDR = 0x200aul,
>> + VMCS_EXEC_PTR = 0x200cul,
>> + TSC_OFFSET = 0x2010ul,
>> + TSC_OFFSET_HI = 0x2011ul,
>> + APIC_VIRT_ADDR = 0x2012ul,
>> + APIC_ACCS_ADDR = 0x2014ul,
>> + EPTP = 0x201aul,
>> + EPTP_HI = 0x201bul,
>> +
>> + /* 64-Bit Readonly Data Field */
>> + INFO_PHYS_ADDR = 0x2400ul,
>> +
>> + /* 64-Bit Guest State */
>> + VMCS_LINK_PTR = 0x2800ul,
>> + VMCS_LINK_PTR_HI = 0x2801ul,
>> + GUEST_DEBUGCTL = 0x2802ul,
>> + GUEST_DEBUGCTL_HI = 0x2803ul,
>> + GUEST_EFER = 0x2806ul,
>> + GUEST_PERF_GLOBAL_CTRL = 0x2808ul,
>> + GUEST_PDPTE = 0x280aul,
>> +
>> + /* 64-Bit Host State */
>> + HOST_EFER = 0x2c02ul,
>> + HOST_PERF_GLOBAL_CTRL = 0x2c04ul,
>> +
>> + /* 32-Bit Control Fields */
>> + PIN_CONTROLS = 0x4000ul,
>> + CPU_EXEC_CTRL0 = 0x4002ul,
>> + EXC_BITMAP = 0x4004ul,
>> + PF_ERROR_MASK = 0x4006ul,
>> + PF_ERROR_MATCH = 0x4008ul,
>> + CR3_TARGET_COUNT = 0x400aul,
>> + EXI_CONTROLS = 0x400cul,
>> + EXI_MSR_ST_CNT = 0x400eul,
>> + EXI_MSR_LD_CNT = 0x4010ul,
>> + ENT_CONTROLS = 0x4012ul,
>> + ENT_MSR_LD_CNT = 0x4014ul,
>> + ENT_INTR_INFO = 0x4016ul,
>> + ENT_INTR_ERROR = 0x4018ul,
>> + ENT_INST_LEN = 0x401aul,
>> + TPR_THRESHOLD = 0x401cul,
>> + CPU_EXEC_CTRL1 = 0x401eul,
>> +
>> + /* 32-Bit R/O Data Fields */
>> + VMX_INST_ERROR = 0x4400ul,
>> + EXI_REASON = 0x4402ul,
>> + EXI_INTR_INFO = 0x4404ul,
>> + EXI_INTR_ERROR = 0x4406ul,
>> + IDT_VECT_INFO = 0x4408ul,
>> + IDT_VECT_ERROR = 0x440aul,
>> + EXI_INST_LEN = 0x440cul,
>> + EXI_INST_INFO = 0x440eul,
>> +
>> + /* 32-Bit Guest State Fields */
>> + GUEST_LIMIT_ES = 0x4800ul,
>> + GUEST_LIMIT_CS = 0x4802ul,
>> + GUEST_LIMIT_SS = 0x4804ul,
>> + GUEST_LIMIT_DS = 0x4806ul,
>> + GUEST_LIMIT_FS = 0x4808ul,
>> + GUEST_LIMIT_GS = 0x480aul,
>> + GUEST_LIMIT_LDTR = 0x480cul,
>> + GUEST_LIMIT_TR = 0x480eul,
>> + GUEST_LIMIT_GDTR = 0x4810ul,
>> + GUEST_LIMIT_IDTR = 0x4812ul,
>> + GUEST_AR_ES = 0x4814ul,
>> + GUEST_AR_CS = 0x4816ul,
>> + GUEST_AR_SS = 0x4818ul,
>> + GUEST_AR_DS = 0x481aul,
>> + GUEST_AR_FS = 0x481cul,
>> + GUEST_AR_GS = 0x481eul,
>> + GUEST_AR_LDTR = 0x4820ul,
>> + GUEST_AR_TR = 0x4822ul,
>> + GUEST_INTR_STATE = 0x4824ul,
>> + GUEST_ACTV_STATE = 0x4826ul,
>> + GUEST_SMBASE = 0x4828ul,
>> + GUEST_SYSENTER_CS = 0x482aul,
>> +
>> + /* 32-Bit Host State Fields */
>> + HOST_SYSENTER_CS = 0x4c00ul,
>> +
>> + /* Natural-Width Control Fields */
>> + CR0_MASK = 0x6000ul,
>> + CR4_MASK = 0x6002ul,
>> + CR0_READ_SHADOW = 0x6004ul,
>> + CR4_READ_SHADOW = 0x6006ul,
>> + CR3_TARGET_0 = 0x6008ul,
>> + CR3_TARGET_1 = 0x600aul,
>> + CR3_TARGET_2 = 0x600cul,
>> + CR3_TARGET_3 = 0x600eul,
>> +
>> + /* Natural-Width R/O Data Fields */
>> + EXI_QUALIFICATION = 0x6400ul,
>> + IO_RCX = 0x6402ul,
>> + IO_RSI = 0x6404ul,
>> + IO_RDI = 0x6406ul,
>> + IO_RIP = 0x6408ul,
>> + GUEST_LINEAR_ADDRESS = 0x640aul,
>> +
>> + /* Natural-Width Guest State Fields */
>> + GUEST_CR0 = 0x6800ul,
>> + GUEST_CR3 = 0x6802ul,
>> + GUEST_CR4 = 0x6804ul,
>> + GUEST_BASE_ES = 0x6806ul,
>> + GUEST_BASE_CS = 0x6808ul,
>> + GUEST_BASE_SS = 0x680aul,
>> + GUEST_BASE_DS = 0x680cul,
>> + GUEST_BASE_FS = 0x680eul,
>> + GUEST_BASE_GS = 0x6810ul,
>> + GUEST_BASE_LDTR = 0x6812ul,
>> + GUEST_BASE_TR = 0x6814ul,
>> + GUEST_BASE_GDTR = 0x6816ul,
>> + GUEST_BASE_IDTR = 0x6818ul,
>> + GUEST_DR7 = 0x681aul,
>> + GUEST_RSP = 0x681cul,
>> + GUEST_RIP = 0x681eul,
>> + GUEST_RFLAGS = 0x6820ul,
>> + GUEST_PENDING_DEBUG = 0x6822ul,
>> + GUEST_SYSENTER_ESP = 0x6824ul,
>> + GUEST_SYSENTER_EIP = 0x6826ul,
>> +
>> + /* Natural-Width Host State Fields */
>> + HOST_CR0 = 0x6c00ul,
>> + HOST_CR3 = 0x6c02ul,
>> + HOST_CR4 = 0x6c04ul,
>> + HOST_BASE_FS = 0x6c06ul,
>> + HOST_BASE_GS = 0x6c08ul,
>> + HOST_BASE_TR = 0x6c0aul,
>> + HOST_BASE_GDTR = 0x6c0cul,
>> + HOST_BASE_IDTR = 0x6c0eul,
>> + HOST_SYSENTER_ESP = 0x6c10ul,
>> + HOST_SYSENTER_EIP = 0x6c12ul,
>> + HOST_RSP = 0x6c14ul,
>> + HOST_RIP = 0x6c16ul
>> +};
>> +
>> +enum Reason {
>> + VMX_EXC_NMI = 0,
>> + VMX_EXTINT = 1,
>> + VMX_TRIPLE_FAULT = 2,
>> + VMX_INIT = 3,
>> + VMX_SIPI = 4,
>> + VMX_SMI_IO = 5,
>> + VMX_SMI_OTHER = 6,
>> + VMX_INTR_WINDOW = 7,
>> + VMX_NMI_WINDOW = 8,
>> + VMX_TASK_SWITCH = 9,
>> + VMX_CPUID = 10,
>> + VMX_GETSEC = 11,
>> + VMX_HLT = 12,
>> + VMX_INVD = 13,
>> + VMX_INVLPG = 14,
>> + VMX_RDPMC = 15,
>> + VMX_RDTSC = 16,
>> + VMX_RSM = 17,
>> + VMX_VMCALL = 18,
>> + VMX_VMCLEAR = 19,
>> + VMX_VMLAUNCH = 20,
>> + VMX_VMPTRLD = 21,
>> + VMX_VMPTRST = 22,
>> + VMX_VMREAD = 23,
>> + VMX_VMRESUME = 24,
>> + VMX_VMWRITE = 25,
>> + VMX_VMXOFF = 26,
>> + VMX_VMXON = 27,
>> + VMX_CR = 28,
>> + VMX_DR = 29,
>> + VMX_IO = 30,
>> + VMX_RDMSR = 31,
>> + VMX_WRMSR = 32,
>> + VMX_FAIL_STATE = 33,
>> + VMX_FAIL_MSR = 34,
>> + VMX_MWAIT = 36,
>> + VMX_MTF = 37,
>> + VMX_MONITOR = 39,
>> + VMX_PAUSE = 40,
>> + VMX_FAIL_MCHECK = 41,
>> + VMX_TPR_THRESHOLD = 43,
>> + VMX_APIC_ACCESS = 44,
>> + VMX_GDTR_IDTR = 46,
>> + VMX_LDTR_TR = 47,
>> + VMX_EPT_VIOLATION = 48,
>> + VMX_EPT_MISCONFIG = 49,
>> + VMX_INVEPT = 50,
>> + VMX_PREEMPT = 52,
>> + VMX_INVVPID = 53,
>> + VMX_WBINVD = 54,
>> + VMX_XSETBV = 55
>> +};
>> +
>> +#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
>> +#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */
>> +
>> +enum Ctrl_exi {
>> + EXI_HOST_64 = 1UL << 9,
>> + EXI_LOAD_PERF = 1UL << 12,
>> + EXI_INTA = 1UL << 15,
>> + EXI_LOAD_EFER = 1UL << 21,
>> +};
>> +
>> +enum Ctrl_ent {
>> + ENT_GUEST_64 = 1UL << 9,
>> + ENT_LOAD_EFER = 1UL << 15,
>> +};
>> +
>> +enum Ctrl_pin {
>> + PIN_EXTINT = 1ul << 0,
>> + PIN_NMI = 1ul << 3,
>> + PIN_VIRT_NMI = 1ul << 5,
>> +};
>> +
>> +enum Ctrl0 {
>> + CPU_INTR_WINDOW = 1ul << 2,
>> + CPU_HLT = 1ul << 7,
>> + CPU_INVLPG = 1ul << 9,
>> + CPU_CR3_LOAD = 1ul << 15,
>> + CPU_CR3_STORE = 1ul << 16,
>> + CPU_TPR_SHADOW = 1ul << 21,
>> + CPU_NMI_WINDOW = 1ul << 22,
>> + CPU_IO = 1ul << 24,
>> + CPU_IO_BITMAP = 1ul << 25,
>> + CPU_SECONDARY = 1ul << 31,
>> +};
>> +
>> +enum Ctrl1 {
>> + CPU_EPT = 1ul << 1,
>> + CPU_VPID = 1ul << 5,
>> + CPU_URG = 1ul << 7,
>> +};
>> +
>> +#define SEL_NULL_DESC 0x0
>> +#define SEL_KERN_CODE_64 0x8
>> +#define SEL_KERN_DATA_64 0x10
>> +#define SEL_USER_CODE_64 0x18
>> +#define SEL_USER_DATA_64 0x20
>> +#define SEL_CODE_32 0x28
>> +#define SEL_DATA_32 0x30
>> +#define SEL_CODE_16 0x38
>> +#define SEL_DATA_16 0x40
>> +#define SEL_TSS_RUN 0x48
>> +
>> +#define SAVE_GPR \
>> + "xchg %rax, regs\n\t" \
>> + "xchg %rbx, regs+0x8\n\t" \
>> + "xchg %rcx, regs+0x10\n\t" \
>> + "xchg %rdx, regs+0x18\n\t" \
>> + "xchg %rbp, regs+0x28\n\t" \
>> + "xchg %rsi, regs+0x30\n\t" \
>> + "xchg %rdi, regs+0x38\n\t" \
>> + "xchg %r8, regs+0x40\n\t" \
>> + "xchg %r9, regs+0x48\n\t" \
>> + "xchg %r10, regs+0x50\n\t" \
>> + "xchg %r11, regs+0x58\n\t" \
>> + "xchg %r12, regs+0x60\n\t" \
>> + "xchg %r13, regs+0x68\n\t" \
>> + "xchg %r14, regs+0x70\n\t" \
>> + "xchg %r15, regs+0x78\n\t"
>> +
>> +#define LOAD_GPR SAVE_GPR
>> +
>> +#define SAVE_GPR_C \
>> + "xchg %%rax, regs\n\t" \
>> + "xchg %%rbx, regs+0x8\n\t" \
>> + "xchg %%rcx, regs+0x10\n\t" \
>> + "xchg %%rdx, regs+0x18\n\t" \
>> + "xchg %%rbp, regs+0x28\n\t" \
>> + "xchg %%rsi, regs+0x30\n\t" \
>> + "xchg %%rdi, regs+0x38\n\t" \
>> + "xchg %%r8, regs+0x40\n\t" \
>> + "xchg %%r9, regs+0x48\n\t" \
>> + "xchg %%r10, regs+0x50\n\t" \
>> + "xchg %%r11, regs+0x58\n\t" \
>> + "xchg %%r12, regs+0x60\n\t" \
>> + "xchg %%r13, regs+0x68\n\t" \
>> + "xchg %%r14, regs+0x70\n\t" \
>> + "xchg %%r15, regs+0x78\n\t"
>> +
>> +#define LOAD_GPR_C SAVE_GPR_C
>> +
>> +#define CR0_PE (1ul << 0)
>> +#define CR0_PG (1ul << 31)
>> +#define CR4_VMXE (1ul << 0)
>> +#define CR4_PAE (1ul << 5)
>> +#define CR4_PCIDE (1ul << 17)
>> +
>> +#define VMX_IO_SIZE_MASK 0x7
>> +#define _VMX_IO_BYTE 1
>> +#define _VMX_IO_WORD 2
>> +#define _VMX_IO_LONG 3
>> +#define VMX_IO_DIRECTION_MASK (1ul << 3)
>> +#define VMX_IO_IN (1ul << 3)
>> +#define VMX_IO_OUT 0
>> +#define VMX_IO_STRING (1ul << 4)
>> +#define VMX_IO_REP (1ul << 5)
>> +#define VMX_IO_OPRAND_DX (1ul << 6)
>> +#define VMX_IO_PORT_MASK 0xFFFF0000
>> +#define VMX_IO_PORT_SHIFT 16
>> +
>> +#define VMX_TEST_VMEXIT 1
>> +#define VMX_TEST_EXIT 2
>> +#define VMX_TEST_RESUME 3
>> +#define VMX_TEST_LAUNCH_ERR 4
>> +#define VMX_TEST_RESUME_ERR 5
>> +
>> +#define HYPERCALL_BIT (1ul << 12)
>> +#define HYPERCALL_MASK 0xFFF
>> +#define HYPERCALL_VMEXIT 0x1
>> +
>> +
>> +inline u64 get_rflags(void)
>> +{
>> + u64 r;
>> + asm volatile("pushf; pop %0\n\t" : "=q"(r) : : "cc");
>> + return r;
>> +}
>> +
>> +inline void set_rflags(u64 r)
>> +{
>> + asm volatile("push %0; popf\n\t" : : "q"(r) : "cc");
>> +}
>> +
>> +inline u64 get_rsp(void)
>> +{
>> + u64 r;
>> + asm volatile("mov %%rsp, %0\n\t" : "=r"(r));
>> + return r;
>> +}
>> +
>> +inline bool vmlaunch(void)
>> +{
>> + bool ret;
>> + asm volatile("vmlaunch;setbe %0\n\t" : "=m"(ret) : : "memory");
>> + return ret;
>> +}
>> +
>> +inline bool vmresume(void)
>> +{
>> + bool ret;
>> + asm volatile(LOAD_GPR_C "vmresume;setbe %0\n\t" : "=m"(ret) : :
>> "memory");
>> + return ret;
>> +}
>
> The last two are no longer used.
I will remove them later.
Arthur
>
>> +
>> +
>> +#endif
>> +
>>
>
> Looks good in general to me.
>
> Jan
>
--
Arthur Chunqi Li
Department of Computer Science
School of EECS
Peking University
Beijing, China
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
