From: Gleb Natapov <gleb@redhat.com>
To: Arthur Chunqi Li <yzt356@gmail.com>
Cc: kvm <kvm@vger.kernel.org>, Jan Kiszka <jan.kiszka@web.de>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH v3] kvm-unit-tests : Basic architecture of VMX nested test case
Date: Sun, 28 Jul 2013 17:34:20 +0300 [thread overview]
Message-ID: <20130728143420.GL11772@redhat.com> (raw)
In-Reply-To: <CABpY8M++fnb5sECBvwUiJVWM=C2=AT3OBcoZg_ivLfPosjszTA@mail.gmail.com>
On Sun, Jul 28, 2013 at 10:24:34PM +0800, Arthur Chunqi Li wrote:
> Hi Gleb,
>
> It suddenly occured to me that this patch also fails to handle
> GUEST_RFLAGS when VMRESUME.
>
As you are saying below if test wants to change rflags in a middle of
the run it can use vmcs_write, so this is not a big deal.
> I decide to remove rflags in struct regs since rflags can be read and
> set via vmcs_read/vmcs_write in test suited defined functions (init
> and exit_handler), and other general registers can only be set in the
> framework code.
>
The code that prints vmlaunch/vmresume error in vmx_run() relies on
rflags been saved by assembly code, so be careful.
> Then I will wait for Paolo and Gleb's furthur feedback and commit the
> final patch.
>
Yes please wait for Paolo comments. I want to hear his opinion on
assembly code. Will not be surprised if he will find the reason it
cannot work :)
> Arthur
>
> On Sun, Jul 28, 2013 at 10:00 PM, Arthur Chunqi Li <yzt356@gmail.com> 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 <yzt356@gmail.com>
> > ---
> > ChangeLog:
> > 1. Refine codes in function vmx_run()
> > 2. Fix bug of setting GUEST_RFLAGS
> > 3. Move defines of selectors to lib/x86/vm.h
> > 4. Move CR0/4 defines to lib/x86/vm.h, so as some defines in lib/x86/vm.c
> > 5. Move some inline functions to lib/x86/processor.h
> > 6. Move some inline functions (vmcs related) to x86/vmx.h
> > ---
> > config-x86-common.mak | 2 +
> > config-x86_64.mak | 1 +
> > lib/x86/msr.h | 5 +
> > lib/x86/processor.h | 15 ++
> > lib/x86/vm.c | 4 -
> > lib/x86/vm.h | 21 ++
> > x86/cstart64.S | 4 +
> > x86/unittests.cfg | 6 +
> > x86/vmx.c | 674 +++++++++++++++++++++++++++++++++++++++++++++++++
> > x86/vmx.h | 466 ++++++++++++++++++++++++++++++++++
> > 10 files changed, 1194 insertions(+), 4 deletions(-)
> > 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/lib/x86/processor.h b/lib/x86/processor.h
> > index e46d8d0..f0c11cc 100644
> > --- a/lib/x86/processor.h
> > +++ b/lib/x86/processor.h
> > @@ -307,4 +307,19 @@ static inline void safe_halt(void)
> > {
> > asm volatile("sti; hlt");
> > }
> > +
> > +#ifdef __x86_64__
> > +static inline u64 read_rflags(void)
> > +{
> > + u64 r;
> > + asm volatile("pushf; pop %0\n\t" : "=q"(r) : : "cc");
> > + return r;
> > +}
> > +
> > +static inline void write_rflags(u64 r)
> > +{
> > + asm volatile("push %0; popf\n\t" : : "q"(r) : "cc");
> > +}
> > +#endif
> > +
> > #endif
> > diff --git a/lib/x86/vm.c b/lib/x86/vm.c
> > index 260ec45..188bf57 100644
> > --- a/lib/x86/vm.c
> > +++ b/lib/x86/vm.c
> > @@ -9,10 +9,6 @@
> > #define LARGE_PAGE_SIZE (1024 * PAGE_SIZE)
> > #endif
> >
> > -#define X86_CR0_PE 0x00000001
> > -#define X86_CR0_WP 0x00010000
> > -#define X86_CR0_PG 0x80000000
> > -#define X86_CR4_PSE 0x00000010
> > static void *free = 0;
> > static void *vfree_top = 0;
> >
> > diff --git a/lib/x86/vm.h b/lib/x86/vm.h
> > index 0b5b5c7..eff6f72 100644
> > --- a/lib/x86/vm.h
> > +++ b/lib/x86/vm.h
> > @@ -16,6 +16,27 @@
> > #define PTE_USER (1ull << 2)
> > #define PTE_ADDR (0xffffffffff000ull)
> >
> > +#define X86_CR0_PE 0x00000001
> > +#define X86_CR0_WP 0x00010000
> > +#define X86_CR0_PG 0x80000000
> > +#define X86_CR4_VMXE 0x00000001
> > +#define X86_CR4_PSE 0x00000010
> > +#define X86_CR4_PAE 0x00000020
> > +#define X86_CR4_PCIDE 0x00020000
> > +
> > +#ifdef __x86_64__
> > +#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
> > +#endif
> > +
> > void setup_vm();
> >
> > void *vmalloc(unsigned long size);
> > 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..7467927
> > --- /dev/null
> > +++ b/x86/vmx.c
> > @@ -0,0 +1,674 @@
> > +#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;
> > +
> > +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 make_vmcs_current(struct vmcs *vmcs)
> > +{
> > + bool ret;
> > +
> > + asm volatile ("vmptrld %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 = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
> > + write_rflags(rflags);
> > + report("test vmclear", vmcs_clear(vmcs_root) == 0);
> > +}
> > +
> > +static void test_vmxoff(void)
> > +{
> > + int ret;
> > + u64 rflags;
> > +
> > + rflags = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
> > + write_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 |= X86_CR0_PG;
> > + guest_cr4 |= X86_CR4_PAE;
> > + }
> > + if ((ctrl_enter & ENT_GUEST_64) == 0)
> > + guest_cr4 &= (~X86_CR4_PCIDE);
> > + if (guest_cr0 & X86_CR0_PG)
> > + guest_cr0 |= X86_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 | X86_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 = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
> > + write_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 = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
> > + write_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 = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
> > + write_rflags(rflags);
> > + ret = vmcs_save(&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 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, fail = 0;
> > +
> > + while (1) {
> > + asm volatile (
> > + "mov %%rsp, %%rsi\n\t"
> > + "mov %2, %%rdi\n\t"
> > + "vmwrite %%rsi, %%rdi\n\t"
> > +
> > + LOAD_GPR_C
> > + "cmpl $0, %1\n\t"
> > + "jne 1f\n\t"
> > + LOAD_RFLAGS
> > + "vmlaunch\n\t"
> > + "jmp 2f\n\t"
> > + "1: "
> > + "vmresume\n\t"
> > + "2: "
> > + "setbe %0\n\t"
> > + "vmx_return:\n\t"
> > + SAVE_GPR_C
> > + SAVE_RFLAGS
> > + : "=m"(fail)
> > + : "m"(launched), "i"(HOST_RSP)
> > + : "rdi", "rsi", "memory", "cc"
> > +
> > + );
> > + if (fail)
> > + ret = launched ? VMX_TEST_RESUME_ERR :
> > + VMX_TEST_LAUNCH_ERR;
> > + else {
> > + launched = 1;
> > + ret = exit_handler();
> > + }
> > + if (ret != VMX_TEST_RESUME)
> > + break;
> > + }
> > + launched = 0;
> > + switch (ret) {
> > + case VMX_TEST_VMEXIT:
> > + return 0;
> > + case VMX_TEST_LAUNCH_ERR:
> > + printf("%s : vmlaunch failed.\n", __func__);
> > + if ((!(regs.rflags & X86_EFLAGS_CF) && !(regs.rflags & X86_EFLAGS_ZF))
> > + || ((regs.rflags & X86_EFLAGS_CF) && (regs.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 ((!(regs.rflags & X86_EFLAGS_CF) && !(regs.rflags & X86_EFLAGS_ZF))
> > + || ((regs.rflags & X86_EFLAGS_CF) && (regs.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;
> > + vmcs_write(GUEST_RFLAGS, regs.rflags | 0x2);
> > + 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..1fb9738
> > --- /dev/null
> > +++ b/x86/vmx.h
> > @@ -0,0 +1,466 @@
> > +#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;
> > + u64 rflags;
> > +};
> > +
> > +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 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 SAVE_RFLAGS \
> > + "pushf\n\t" \
> > + "pop regs+0x80\n\t"
> > +
> > +#define LOAD_RFLAGS \
> > + "push regs+0x80\n\t" \
> > + "popf\n\t"
> > +
> > +#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
> > +
> > +static inline int vmcs_clear(struct vmcs *vmcs)
> > +{
> > + bool ret;
> > + asm volatile ("vmclear %1; setbe %0" : "=q" (ret) : "m" (vmcs) : "cc");
> > + return ret;
> > +}
> > +
> > +static inline u64 vmcs_read(enum Encoding enc)
> > +{
> > + u64 val;
> > + asm volatile ("vmread %1, %0" : "=rm" (val) : "r" ((u64)enc) : "cc");
> > + return val;
> > +}
> > +
> > +static inline 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 inline int vmcs_save(struct vmcs **vmcs)
> > +{
> > + bool ret;
> > +
> > + asm volatile ("vmptrst %1; setbe %0" : "=q" (ret) : "m" (*vmcs) : "cc");
> > + return ret;
> > +}
> > +
> > +#endif
> > +
> > --
> > 1.7.9.5
> >
--
Gleb.
next prev parent reply other threads:[~2013-07-28 14:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-28 14:00 [PATCH v3] kvm-unit-tests : Basic architecture of VMX nested test case Arthur Chunqi Li
2013-07-28 14:24 ` Arthur Chunqi Li
2013-07-28 14:32 ` Arthur Chunqi Li
2013-07-28 14:34 ` Gleb Natapov [this message]
2013-07-30 7:31 ` Marius Vlad
2013-07-30 7:42 ` Gleb Natapov
2013-07-30 7:59 ` Marius Vlad
2013-07-30 8:07 ` Gleb Natapov
2013-07-30 9:14 ` Arthur Chunqi Li
2013-07-30 11:51 ` Marius Vlad
2013-07-30 14:53 ` Paolo Bonzini
2013-07-30 14:57 ` Arthur Chunqi Li
2013-07-30 14:59 ` Paolo Bonzini
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