* [PATCH] kvm-unit-test: nSVM: Restructure nSVM test code
2020-02-05 20:50 [PATCH] kvm-unit-test: nSVM: Restructure nSVM test code Krish Sadhukhan
@ 2020-02-05 20:50 ` Krish Sadhukhan
2020-03-06 20:31 ` Krish Sadhukhan
2020-03-18 12:02 ` Paolo Bonzini
2 siblings, 0 replies; 4+ messages in thread
From: Krish Sadhukhan @ 2020-02-05 20:50 UTC (permalink / raw)
To: kvm; +Cc: pbonzini
..so that it matches its counterpart nVMX. This restructuring effort
separates the test framework from the tests and puts them in different
files.
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
---
x86/Makefile.x86_64 | 1 +
x86/svm.c | 1718 +++++++--------------------------------------------
x86/svm.h | 52 +-
x86/svm_tests.c | 1279 ++++++++++++++++++++++++++++++++++++++
4 files changed, 1551 insertions(+), 1499 deletions(-)
create mode 100644 x86/svm_tests.c
diff --git a/x86/Makefile.x86_64 b/x86/Makefile.x86_64
index 010102b..af61d85 100644
--- a/x86/Makefile.x86_64
+++ b/x86/Makefile.x86_64
@@ -26,3 +26,4 @@ include $(SRCDIR)/$(TEST_DIR)/Makefile.common
$(TEST_DIR)/hyperv_clock.elf: $(TEST_DIR)/hyperv_clock.o
$(TEST_DIR)/vmx.elf: $(TEST_DIR)/vmx_tests.o
+$(TEST_DIR)/svm.elf: $(TEST_DIR)/svm_tests.o
diff --git a/x86/svm.c b/x86/svm.c
index aa3d995..07571e9 100644
--- a/x86/svm.c
+++ b/x86/svm.c
@@ -1,3 +1,7 @@
+/*
+ * Framework for testing nested virtualization
+ */
+
#include "svm.h"
#include "libcflat.h"
#include "processor.h"
@@ -10,1596 +14,314 @@
#include "isr.h"
#include "apic.h"
-#define SVM_EXIT_MAX_DR_INTERCEPT 0x3f
-
/* for the nested page table*/
-u64 *pml4e;
-u64 *pdpe;
-u64 *pde[4];
u64 *pte[2048];
-void *scratch_page;
-
-#define LATENCY_RUNS 1000000
-
-u64 tsc_start;
-u64 tsc_end;
-
-u64 vmrun_sum, vmexit_sum;
-u64 vmsave_sum, vmload_sum;
-u64 stgi_sum, clgi_sum;
-u64 latvmrun_max;
-u64 latvmrun_min;
-u64 latvmexit_max;
-u64 latvmexit_min;
-u64 latvmload_max;
-u64 latvmload_min;
-u64 latvmsave_max;
-u64 latvmsave_min;
-u64 latstgi_max;
-u64 latstgi_min;
-u64 latclgi_max;
-u64 latclgi_min;
-u64 runs;
-
-u8 *io_bitmap;
-u8 io_bitmap_area[16384];
-
-#define MSR_BITMAP_SIZE 8192
-
-u8 *msr_bitmap;
-u8 msr_bitmap_area[MSR_BITMAP_SIZE + PAGE_SIZE];
-
-static bool npt_supported(void)
-{
- return this_cpu_has(X86_FEATURE_NPT);
-}
-
-static void setup_svm(void)
-{
- void *hsave = alloc_page();
- u64 *page, address;
- int i,j;
-
- wrmsr(MSR_VM_HSAVE_PA, virt_to_phys(hsave));
- wrmsr(MSR_EFER, rdmsr(MSR_EFER) | EFER_SVME);
- wrmsr(MSR_EFER, rdmsr(MSR_EFER) | EFER_NX);
-
- scratch_page = alloc_page();
-
- io_bitmap = (void *) (((ulong)io_bitmap_area + 4095) & ~4095);
-
- msr_bitmap = (void *) ALIGN((ulong)msr_bitmap_area, PAGE_SIZE);
-
- if (!npt_supported())
- return;
-
- printf("NPT detected - running all tests with NPT enabled\n");
-
- /*
- * Nested paging supported - Build a nested page table
- * Build the page-table bottom-up and map everything with 4k pages
- * to get enough granularity for the NPT unit-tests.
- */
-
- address = 0;
-
- /* PTE level */
- for (i = 0; i < 2048; ++i) {
- page = alloc_page();
-
- for (j = 0; j < 512; ++j, address += 4096)
- page[j] = address | 0x067ULL;
-
- pte[i] = page;
- }
-
- /* PDE level */
- for (i = 0; i < 4; ++i) {
- page = alloc_page();
-
- for (j = 0; j < 512; ++j)
- page[j] = (u64)pte[(i * 512) + j] | 0x027ULL;
-
- pde[i] = page;
- }
-
- /* PDPe level */
- pdpe = alloc_page();
- for (i = 0; i < 4; ++i)
- pdpe[i] = ((u64)(pde[i])) | 0x27;
-
- /* PML4e level */
- pml4e = alloc_page();
- pml4e[0] = ((u64)pdpe) | 0x27;
-}
-
-static u64 *npt_get_pde(u64 address)
-{
- int i1, i2;
-
- address >>= 21;
- i1 = (address >> 9) & 0x3;
- i2 = address & 0x1ff;
-
- return &pde[i1][i2];
-}
+u64 *pde[4];
+u64 *pdpe;
+u64 *pml4e;
-static u64 *npt_get_pte(u64 address)
+u64 *npt_get_pte(u64 address)
{
- int i1, i2;
+ int i1, i2;
- address >>= 12;
- i1 = (address >> 9) & 0x7ff;
- i2 = address & 0x1ff;
-
- return &pte[i1][i2];
-}
+ address >>= 12;
+ i1 = (address >> 9) & 0x7ff;
+ i2 = address & 0x1ff;
-static void vmcb_set_seg(struct vmcb_seg *seg, u16 selector,
- u64 base, u32 limit, u32 attr)
-{
- seg->selector = selector;
- seg->attrib = attr;
- seg->limit = limit;
- seg->base = base;
+ return &pte[i1][i2];
}
-static void vmcb_ident(struct vmcb *vmcb)
+u64 *npt_get_pde(u64 address)
{
- u64 vmcb_phys = virt_to_phys(vmcb);
- struct vmcb_save_area *save = &vmcb->save;
- struct vmcb_control_area *ctrl = &vmcb->control;
- u32 data_seg_attr = 3 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK
- | SVM_SELECTOR_DB_MASK | SVM_SELECTOR_G_MASK;
- u32 code_seg_attr = 9 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK
- | SVM_SELECTOR_L_MASK | SVM_SELECTOR_G_MASK;
- struct descriptor_table_ptr desc_table_ptr;
+ int i1, i2;
- memset(vmcb, 0, sizeof(*vmcb));
- asm volatile ("vmsave %0" : : "a"(vmcb_phys) : "memory");
- vmcb_set_seg(&save->es, read_es(), 0, -1U, data_seg_attr);
- vmcb_set_seg(&save->cs, read_cs(), 0, -1U, code_seg_attr);
- vmcb_set_seg(&save->ss, read_ss(), 0, -1U, data_seg_attr);
- vmcb_set_seg(&save->ds, read_ds(), 0, -1U, data_seg_attr);
- sgdt(&desc_table_ptr);
- vmcb_set_seg(&save->gdtr, 0, desc_table_ptr.base, desc_table_ptr.limit, 0);
- sidt(&desc_table_ptr);
- vmcb_set_seg(&save->idtr, 0, desc_table_ptr.base, desc_table_ptr.limit, 0);
- ctrl->asid = 1;
- save->cpl = 0;
- save->efer = rdmsr(MSR_EFER);
- save->cr4 = read_cr4();
- save->cr3 = read_cr3();
- save->cr0 = read_cr0();
- save->dr7 = read_dr7();
- save->dr6 = read_dr6();
- save->cr2 = read_cr2();
- save->g_pat = rdmsr(MSR_IA32_CR_PAT);
- save->dbgctl = rdmsr(MSR_IA32_DEBUGCTLMSR);
- ctrl->intercept = (1ULL << INTERCEPT_VMRUN) | (1ULL << INTERCEPT_VMMCALL);
- ctrl->iopm_base_pa = virt_to_phys(io_bitmap);
- ctrl->msrpm_base_pa = virt_to_phys(msr_bitmap);
+ address >>= 21;
+ i1 = (address >> 9) & 0x3;
+ i2 = address & 0x1ff;
- if (npt_supported()) {
- ctrl->nested_ctl = 1;
- ctrl->nested_cr3 = (u64)pml4e;
- }
-}
-
-struct test {
- const char *name;
- bool (*supported)(void);
- void (*prepare)(struct test *test);
- void (*prepare_gif_clear)(struct test *test);
- void (*guest_func)(struct test *test);
- bool (*finished)(struct test *test);
- bool (*succeeded)(struct test *test);
- struct vmcb *vmcb;
- int exits;
- ulong scratch;
-};
-
-static inline void vmmcall(void)
-{
- asm volatile ("vmmcall" : : : "memory");
-}
-
-static void test_thunk(struct test *test)
-{
- test->guest_func(test);
- vmmcall();
+ return &pde[i1][i2];
}
-struct regs {
- u64 rax;
- u64 rbx;
- u64 rcx;
- u64 rdx;
- 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 regs regs;
-
-// rax handled specially below
-
-#define SAVE_GPR_C \
- "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
-
-static void test_run(struct test *test, struct vmcb *vmcb)
+u64 *npt_get_pdpe(void)
{
- u64 vmcb_phys = virt_to_phys(vmcb);
- u64 guest_stack[10000];
-
- irq_disable();
- test->vmcb = vmcb;
- test->prepare(test);
- vmcb->save.rip = (ulong)test_thunk;
- vmcb->save.rsp = (ulong)(guest_stack + ARRAY_SIZE(guest_stack));
- regs.rdi = (ulong)test;
- do {
- struct test *the_test = test;
- u64 the_vmcb = vmcb_phys;
- tsc_start = rdtsc();
- asm volatile (
- "clgi;\n\t" // semi-colon needed for LLVM compatibility
- "sti \n\t"
- "call *%c[PREPARE_GIF_CLEAR](%[test]) \n \t"
- "mov %[vmcb_phys], %%rax \n\t"
- "vmload %%rax\n\t"
- "mov regs+0x80, %%r15\n\t" // rflags
- "mov %%r15, 0x170(%%rax)\n\t"
- "mov regs, %%r15\n\t" // rax
- "mov %%r15, 0x1f8(%%rax)\n\t"
- LOAD_GPR_C
- "vmrun %%rax\n\t"
- SAVE_GPR_C
- "mov 0x170(%%rax), %%r15\n\t" // rflags
- "mov %%r15, regs+0x80\n\t"
- "mov 0x1f8(%%rax), %%r15\n\t" // rax
- "mov %%r15, regs\n\t"
- "vmsave %%rax\n\t"
- "cli \n\t"
- "stgi"
- : // inputs clobbered by the guest:
- "+D" (the_test), // first argument register
- "+b" (the_vmcb) // callee save register!
- : [test] "0" (the_test),
- [vmcb_phys] "1"(the_vmcb),
- [PREPARE_GIF_CLEAR] "i" (offsetof(struct test, prepare_gif_clear))
- : "rax", "rcx", "rdx", "rsi",
- "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15",
- "memory");
- tsc_end = rdtsc();
- ++test->exits;
- } while (!test->finished(test));
- irq_enable();
-
- report(test->succeeded(test), "%s", test->name);
+ return pdpe;
}
-static bool smp_supported(void)
+bool smp_supported(void)
{
return cpu_count() > 1;
}
-static bool default_supported(void)
+bool default_supported(void)
{
return true;
}
-static void default_prepare(struct test *test)
+void default_prepare(struct svm_test *test)
{
- vmcb_ident(test->vmcb);
+ vmcb_ident(test->vmcb);
}
-static void default_prepare_gif_clear(struct test *test)
+void default_prepare_gif_clear(struct svm_test *test)
{
}
-static bool default_finished(struct test *test)
+bool default_finished(struct svm_test *test)
{
- return true; /* one vmexit */
-}
-
-static void null_test(struct test *test)
-{
-}
-
-static bool null_check(struct test *test)
-{
- return test->vmcb->control.exit_code == SVM_EXIT_VMMCALL;
-}
-
-static void prepare_no_vmrun_int(struct test *test)
-{
- test->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMRUN);
-}
-
-static bool check_no_vmrun_int(struct test *test)
-{
- return test->vmcb->control.exit_code == SVM_EXIT_ERR;
-}
-
-static void test_vmrun(struct test *test)
-{
- asm volatile ("vmrun %0" : : "a"(virt_to_phys(test->vmcb)));
-}
-
-static bool check_vmrun(struct test *test)
-{
- return test->vmcb->control.exit_code == SVM_EXIT_VMRUN;
-}
-
-static void prepare_cr3_intercept(struct test *test)
-{
- default_prepare(test);
- test->vmcb->control.intercept_cr_read |= 1 << 3;
-}
-
-static void test_cr3_intercept(struct test *test)
-{
- asm volatile ("mov %%cr3, %0" : "=r"(test->scratch) : : "memory");
-}
-
-static bool check_cr3_intercept(struct test *test)
-{
- return test->vmcb->control.exit_code == SVM_EXIT_READ_CR3;
-}
-
-static bool check_cr3_nointercept(struct test *test)
-{
- return null_check(test) && test->scratch == read_cr3();
-}
-
-static void corrupt_cr3_intercept_bypass(void *_test)
-{
- struct test *test = _test;
- extern volatile u32 mmio_insn;
-
- while (!__sync_bool_compare_and_swap(&test->scratch, 1, 2))
- pause();
- pause();
- pause();
- pause();
- mmio_insn = 0x90d8200f; // mov %cr3, %rax; nop
+ return true; /* one vmexit */
}
-static void prepare_cr3_intercept_bypass(struct test *test)
+bool npt_supported(void)
{
- default_prepare(test);
- test->vmcb->control.intercept_cr_read |= 1 << 3;
- on_cpu_async(1, corrupt_cr3_intercept_bypass, test);
-}
-
-static void test_cr3_intercept_bypass(struct test *test)
-{
- ulong a = 0xa0000;
-
- test->scratch = 1;
- while (test->scratch != 2)
- barrier();
-
- asm volatile ("mmio_insn: mov %0, (%0); nop"
- : "+a"(a) : : "memory");
- test->scratch = a;
-}
-
-static void prepare_dr_intercept(struct test *test)
-{
- default_prepare(test);
- test->vmcb->control.intercept_dr_read = 0xff;
- test->vmcb->control.intercept_dr_write = 0xff;
-}
-
-static void test_dr_intercept(struct test *test)
-{
- unsigned int i, failcnt = 0;
-
- /* Loop testing debug register reads */
- for (i = 0; i < 8; i++) {
-
- switch (i) {
- case 0:
- asm volatile ("mov %%dr0, %0" : "=r"(test->scratch) : : "memory");
- break;
- case 1:
- asm volatile ("mov %%dr1, %0" : "=r"(test->scratch) : : "memory");
- break;
- case 2:
- asm volatile ("mov %%dr2, %0" : "=r"(test->scratch) : : "memory");
- break;
- case 3:
- asm volatile ("mov %%dr3, %0" : "=r"(test->scratch) : : "memory");
- break;
- case 4:
- asm volatile ("mov %%dr4, %0" : "=r"(test->scratch) : : "memory");
- break;
- case 5:
- asm volatile ("mov %%dr5, %0" : "=r"(test->scratch) : : "memory");
- break;
- case 6:
- asm volatile ("mov %%dr6, %0" : "=r"(test->scratch) : : "memory");
- break;
- case 7:
- asm volatile ("mov %%dr7, %0" : "=r"(test->scratch) : : "memory");
- break;
- }
-
- if (test->scratch != i) {
- report(false, "dr%u read intercept", i);
- failcnt++;
- }
- }
-
- /* Loop testing debug register writes */
- for (i = 0; i < 8; i++) {
-
- switch (i) {
- case 0:
- asm volatile ("mov %0, %%dr0" : : "r"(test->scratch) : "memory");
- break;
- case 1:
- asm volatile ("mov %0, %%dr1" : : "r"(test->scratch) : "memory");
- break;
- case 2:
- asm volatile ("mov %0, %%dr2" : : "r"(test->scratch) : "memory");
- break;
- case 3:
- asm volatile ("mov %0, %%dr3" : : "r"(test->scratch) : "memory");
- break;
- case 4:
- asm volatile ("mov %0, %%dr4" : : "r"(test->scratch) : "memory");
- break;
- case 5:
- asm volatile ("mov %0, %%dr5" : : "r"(test->scratch) : "memory");
- break;
- case 6:
- asm volatile ("mov %0, %%dr6" : : "r"(test->scratch) : "memory");
- break;
- case 7:
- asm volatile ("mov %0, %%dr7" : : "r"(test->scratch) : "memory");
- break;
- }
-
- if (test->scratch != i) {
- report(false, "dr%u write intercept", i);
- failcnt++;
- }
- }
-
- test->scratch = failcnt;
-}
-
-static bool dr_intercept_finished(struct test *test)
-{
- ulong n = (test->vmcb->control.exit_code - SVM_EXIT_READ_DR0);
-
- /* Only expect DR intercepts */
- if (n > (SVM_EXIT_MAX_DR_INTERCEPT - SVM_EXIT_READ_DR0))
- return true;
-
- /*
- * Compute debug register number.
- * Per Appendix C "SVM Intercept Exit Codes" of AMD64 Architecture
- * Programmer's Manual Volume 2 - System Programming:
- * http://support.amd.com/TechDocs/24593.pdf
- * there are 16 VMEXIT codes each for DR read and write.
- */
- test->scratch = (n % 16);
-
- /* Jump over MOV instruction */
- test->vmcb->save.rip += 3;
-
- return false;
-}
-
-static bool check_dr_intercept(struct test *test)
-{
- return !test->scratch;
-}
-
-static bool next_rip_supported(void)
-{
- return this_cpu_has(X86_FEATURE_NRIPS);
-}
-
-static void prepare_next_rip(struct test *test)
-{
- test->vmcb->control.intercept |= (1ULL << INTERCEPT_RDTSC);
-}
-
-
-static void test_next_rip(struct test *test)
-{
- asm volatile ("rdtsc\n\t"
- ".globl exp_next_rip\n\t"
- "exp_next_rip:\n\t" ::: "eax", "edx");
-}
-
-static bool check_next_rip(struct test *test)
-{
- extern char exp_next_rip;
- unsigned long address = (unsigned long)&exp_next_rip;
-
- return address == test->vmcb->control.next_rip;
-}
-
-static void prepare_msr_intercept(struct test *test)
-{
- default_prepare(test);
- test->vmcb->control.intercept |= (1ULL << INTERCEPT_MSR_PROT);
- test->vmcb->control.intercept_exceptions |= (1ULL << GP_VECTOR);
- memset(msr_bitmap, 0xff, MSR_BITMAP_SIZE);
-}
-
-static void test_msr_intercept(struct test *test)
-{
- unsigned long msr_value = 0xef8056791234abcd; /* Arbitrary value */
- unsigned long msr_index;
-
- for (msr_index = 0; msr_index <= 0xc0011fff; msr_index++) {
- if (msr_index == 0xC0010131 /* MSR_SEV_STATUS */) {
- /*
- * Per section 15.34.10 "SEV_STATUS MSR" of AMD64 Architecture
- * Programmer's Manual volume 2 - System Programming:
- * http://support.amd.com/TechDocs/24593.pdf
- * SEV_STATUS MSR (C001_0131) is a non-interceptable MSR.
- */
- continue;
- }
-
- /* Skips gaps between supported MSR ranges */
- if (msr_index == 0x2000)
- msr_index = 0xc0000000;
- else if (msr_index == 0xc0002000)
- msr_index = 0xc0010000;
-
- test->scratch = -1;
-
- rdmsr(msr_index);
-
- /* Check that a read intercept occurred for MSR at msr_index */
- if (test->scratch != msr_index)
- report(false, "MSR 0x%lx read intercept", msr_index);
-
- /*
- * Poor man approach to generate a value that
- * seems arbitrary each time around the loop.
- */
- msr_value += (msr_value << 1);
-
- wrmsr(msr_index, msr_value);
-
- /* Check that a write intercept occurred for MSR with msr_value */
- if (test->scratch != msr_value)
- report(false, "MSR 0x%lx write intercept", msr_index);
- }
-
- test->scratch = -2;
-}
-
-static bool msr_intercept_finished(struct test *test)
-{
- u32 exit_code = test->vmcb->control.exit_code;
- u64 exit_info_1;
- u8 *opcode;
-
- if (exit_code == SVM_EXIT_MSR) {
- exit_info_1 = test->vmcb->control.exit_info_1;
- } else {
- /*
- * If #GP exception occurs instead, check that it was
- * for RDMSR/WRMSR and set exit_info_1 accordingly.
- */
-
- if (exit_code != (SVM_EXIT_EXCP_BASE + GP_VECTOR))
- return true;
-
- opcode = (u8 *)test->vmcb->save.rip;
- if (opcode[0] != 0x0f)
- return true;
-
- switch (opcode[1]) {
- case 0x30: /* WRMSR */
- exit_info_1 = 1;
- break;
- case 0x32: /* RDMSR */
- exit_info_1 = 0;
- break;
- default:
- return true;
- }
-
- /*
- * Warn that #GP exception occured instead.
- * RCX holds the MSR index.
- */
- printf("%s 0x%lx #GP exception\n",
- exit_info_1 ? "WRMSR" : "RDMSR", regs.rcx);
- }
-
- /* Jump over RDMSR/WRMSR instruction */
- test->vmcb->save.rip += 2;
-
- /*
- * Test whether the intercept was for RDMSR/WRMSR.
- * For RDMSR, test->scratch is set to the MSR index;
- * RCX holds the MSR index.
- * For WRMSR, test->scratch is set to the MSR value;
- * RDX holds the upper 32 bits of the MSR value,
- * while RAX hold its lower 32 bits.
- */
- if (exit_info_1)
- test->scratch =
- ((regs.rdx << 32) | (test->vmcb->save.rax & 0xffffffff));
- else
- test->scratch = regs.rcx;
-
- return false;
-}
-
-static bool check_msr_intercept(struct test *test)
-{
- memset(msr_bitmap, 0, MSR_BITMAP_SIZE);
- return (test->scratch == -2);
-}
-
-static void prepare_mode_switch(struct test *test)
-{
- test->vmcb->control.intercept_exceptions |= (1ULL << GP_VECTOR)
- | (1ULL << UD_VECTOR)
- | (1ULL << DF_VECTOR)
- | (1ULL << PF_VECTOR);
- test->scratch = 0;
-}
-
-static void test_mode_switch(struct test *test)
-{
- asm volatile(" cli\n"
- " ljmp *1f\n" /* jump to 32-bit code segment */
- "1:\n"
- " .long 2f\n"
- " .long " xstr(KERNEL_CS32) "\n"
- ".code32\n"
- "2:\n"
- " movl %%cr0, %%eax\n"
- " btcl $31, %%eax\n" /* clear PG */
- " movl %%eax, %%cr0\n"
- " movl $0xc0000080, %%ecx\n" /* EFER */
- " rdmsr\n"
- " btcl $8, %%eax\n" /* clear LME */
- " wrmsr\n"
- " movl %%cr4, %%eax\n"
- " btcl $5, %%eax\n" /* clear PAE */
- " movl %%eax, %%cr4\n"
- " movw %[ds16], %%ax\n"
- " movw %%ax, %%ds\n"
- " ljmpl %[cs16], $3f\n" /* jump to 16 bit protected-mode */
- ".code16\n"
- "3:\n"
- " movl %%cr0, %%eax\n"
- " btcl $0, %%eax\n" /* clear PE */
- " movl %%eax, %%cr0\n"
- " ljmpl $0, $4f\n" /* jump to real-mode */
- "4:\n"
- " vmmcall\n"
- " movl %%cr0, %%eax\n"
- " btsl $0, %%eax\n" /* set PE */
- " movl %%eax, %%cr0\n"
- " ljmpl %[cs32], $5f\n" /* back to protected mode */
- ".code32\n"
- "5:\n"
- " movl %%cr4, %%eax\n"
- " btsl $5, %%eax\n" /* set PAE */
- " movl %%eax, %%cr4\n"
- " movl $0xc0000080, %%ecx\n" /* EFER */
- " rdmsr\n"
- " btsl $8, %%eax\n" /* set LME */
- " wrmsr\n"
- " movl %%cr0, %%eax\n"
- " btsl $31, %%eax\n" /* set PG */
- " movl %%eax, %%cr0\n"
- " ljmpl %[cs64], $6f\n" /* back to long mode */
- ".code64\n\t"
- "6:\n"
- " vmmcall\n"
- :: [cs16] "i"(KERNEL_CS16), [ds16] "i"(KERNEL_DS16),
- [cs32] "i"(KERNEL_CS32), [cs64] "i"(KERNEL_CS64)
- : "rax", "rbx", "rcx", "rdx", "memory");
-}
-
-static bool mode_switch_finished(struct test *test)
-{
- u64 cr0, cr4, efer;
-
- cr0 = test->vmcb->save.cr0;
- cr4 = test->vmcb->save.cr4;
- efer = test->vmcb->save.efer;
-
- /* Only expect VMMCALL intercepts */
- if (test->vmcb->control.exit_code != SVM_EXIT_VMMCALL)
- return true;
-
- /* Jump over VMMCALL instruction */
- test->vmcb->save.rip += 3;
-
- /* Do sanity checks */
- switch (test->scratch) {
- case 0:
- /* Test should be in real mode now - check for this */
- if ((cr0 & 0x80000001) || /* CR0.PG, CR0.PE */
- (cr4 & 0x00000020) || /* CR4.PAE */
- (efer & 0x00000500)) /* EFER.LMA, EFER.LME */
- return true;
- break;
- case 2:
- /* Test should be back in long-mode now - check for this */
- if (((cr0 & 0x80000001) != 0x80000001) || /* CR0.PG, CR0.PE */
- ((cr4 & 0x00000020) != 0x00000020) || /* CR4.PAE */
- ((efer & 0x00000500) != 0x00000500)) /* EFER.LMA, EFER.LME */
- return true;
- break;
- }
-
- /* one step forward */
- test->scratch += 1;
-
- return test->scratch == 2;
-}
-
-static bool check_mode_switch(struct test *test)
-{
- return test->scratch == 2;
-}
-
-static void prepare_ioio(struct test *test)
-{
- test->vmcb->control.intercept |= (1ULL << INTERCEPT_IOIO_PROT);
- test->scratch = 0;
- memset(io_bitmap, 0, 8192);
- io_bitmap[8192] = 0xFF;
-}
-
-static int get_test_stage(struct test *test)
-{
- barrier();
- return test->scratch;
-}
-
-static void set_test_stage(struct test *test, int s)
-{
- barrier();
- test->scratch = s;
- barrier();
-}
-
-static void inc_test_stage(struct test *test)
-{
- barrier();
- test->scratch++;
- barrier();
-}
-
-static void test_ioio(struct test *test)
-{
- // stage 0, test IO pass
- inb(0x5000);
- outb(0x0, 0x5000);
- if (get_test_stage(test) != 0)
- goto fail;
-
- // test IO width, in/out
- io_bitmap[0] = 0xFF;
- inc_test_stage(test);
- inb(0x0);
- if (get_test_stage(test) != 2)
- goto fail;
-
- outw(0x0, 0x0);
- if (get_test_stage(test) != 3)
- goto fail;
-
- inl(0x0);
- if (get_test_stage(test) != 4)
- goto fail;
-
- // test low/high IO port
- io_bitmap[0x5000 / 8] = (1 << (0x5000 % 8));
- inb(0x5000);
- if (get_test_stage(test) != 5)
- goto fail;
-
- io_bitmap[0x9000 / 8] = (1 << (0x9000 % 8));
- inw(0x9000);
- if (get_test_stage(test) != 6)
- goto fail;
-
- // test partial pass
- io_bitmap[0x5000 / 8] = (1 << (0x5000 % 8));
- inl(0x4FFF);
- if (get_test_stage(test) != 7)
- goto fail;
-
- // test across pages
- inc_test_stage(test);
- inl(0x7FFF);
- if (get_test_stage(test) != 8)
- goto fail;
-
- inc_test_stage(test);
- io_bitmap[0x8000 / 8] = 1 << (0x8000 % 8);
- inl(0x7FFF);
- if (get_test_stage(test) != 10)
- goto fail;
-
- io_bitmap[0] = 0;
- inl(0xFFFF);
- if (get_test_stage(test) != 11)
- goto fail;
-
- io_bitmap[0] = 0xFF;
- io_bitmap[8192] = 0;
- inl(0xFFFF);
- inc_test_stage(test);
- if (get_test_stage(test) != 12)
- goto fail;
-
- return;
-
-fail:
- report(false, "stage %d", get_test_stage(test));
- test->scratch = -1;
-}
-
-static bool ioio_finished(struct test *test)
-{
- unsigned port, size;
-
- /* Only expect IOIO intercepts */
- if (test->vmcb->control.exit_code == SVM_EXIT_VMMCALL)
- return true;
-
- if (test->vmcb->control.exit_code != SVM_EXIT_IOIO)
- return true;
-
- /* one step forward */
- test->scratch += 1;
-
- port = test->vmcb->control.exit_info_1 >> 16;
- size = (test->vmcb->control.exit_info_1 >> SVM_IOIO_SIZE_SHIFT) & 7;
-
- while (size--) {
- io_bitmap[port / 8] &= ~(1 << (port & 7));
- port++;
- }
-
- return false;
-}
-
-static bool check_ioio(struct test *test)
-{
- memset(io_bitmap, 0, 8193);
- return test->scratch != -1;
-}
-
-static void prepare_asid_zero(struct test *test)
-{
- test->vmcb->control.asid = 0;
-}
-
-static void test_asid_zero(struct test *test)
-{
- asm volatile ("vmmcall\n\t");
-}
-
-static bool check_asid_zero(struct test *test)
-{
- return test->vmcb->control.exit_code == SVM_EXIT_ERR;
-}
-
-static void sel_cr0_bug_prepare(struct test *test)
-{
- vmcb_ident(test->vmcb);
- test->vmcb->control.intercept |= (1ULL << INTERCEPT_SELECTIVE_CR0);
-}
-
-static bool sel_cr0_bug_finished(struct test *test)
-{
- return true;
-}
-
-static void sel_cr0_bug_test(struct test *test)
-{
- unsigned long cr0;
-
- /* read cr0, clear CD, and write back */
- cr0 = read_cr0();
- cr0 |= (1UL << 30);
- write_cr0(cr0);
-
- /*
- * If we are here the test failed, not sure what to do now because we
- * are not in guest-mode anymore so we can't trigger an intercept.
- * Trigger a tripple-fault for now.
- */
- report(false, "sel_cr0 test. Can not recover from this - exiting");
- exit(report_summary());
-}
-
-static bool sel_cr0_bug_check(struct test *test)
-{
- return test->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE;
-}
-
-static void npt_nx_prepare(struct test *test)
-{
-
- u64 *pte;
-
- vmcb_ident(test->vmcb);
- pte = npt_get_pte((u64)null_test);
-
- *pte |= (1ULL << 63);
-}
-
-static bool npt_nx_check(struct test *test)
-{
- u64 *pte = npt_get_pte((u64)null_test);
-
- *pte &= ~(1ULL << 63);
-
- test->vmcb->save.efer |= (1 << 11);
-
- return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
- && (test->vmcb->control.exit_info_1 == 0x100000015ULL);
-}
-
-static void npt_us_prepare(struct test *test)
-{
- u64 *pte;
-
- vmcb_ident(test->vmcb);
- pte = npt_get_pte((u64)scratch_page);
-
- *pte &= ~(1ULL << 2);
-}
-
-static void npt_us_test(struct test *test)
-{
- (void) *(volatile u64 *)scratch_page;
-}
-
-static bool npt_us_check(struct test *test)
-{
- u64 *pte = npt_get_pte((u64)scratch_page);
-
- *pte |= (1ULL << 2);
-
- return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
- && (test->vmcb->control.exit_info_1 == 0x100000005ULL);
-}
-
-u64 save_pde;
-
-static void npt_rsvd_prepare(struct test *test)
-{
- u64 *pde;
-
- vmcb_ident(test->vmcb);
- pde = npt_get_pde((u64) null_test);
-
- save_pde = *pde;
- *pde = (1ULL << 19) | (1ULL << 7) | 0x27;
-}
-
-static bool npt_rsvd_check(struct test *test)
-{
- u64 *pde = npt_get_pde((u64) null_test);
-
- *pde = save_pde;
-
- return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
- && (test->vmcb->control.exit_info_1 == 0x10000001dULL);
-}
-
-static void npt_rw_prepare(struct test *test)
-{
-
- u64 *pte;
-
- vmcb_ident(test->vmcb);
- pte = npt_get_pte(0x80000);
-
- *pte &= ~(1ULL << 1);
-}
-
-static void npt_rw_test(struct test *test)
-{
- u64 *data = (void*)(0x80000);
-
- *data = 0;
-}
-
-static bool npt_rw_check(struct test *test)
-{
- u64 *pte = npt_get_pte(0x80000);
-
- *pte |= (1ULL << 1);
-
- return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
- && (test->vmcb->control.exit_info_1 == 0x100000007ULL);
-}
-
-static void npt_rw_pfwalk_prepare(struct test *test)
-{
-
- u64 *pte;
-
- vmcb_ident(test->vmcb);
- pte = npt_get_pte(read_cr3());
-
- *pte &= ~(1ULL << 1);
-}
-
-static bool npt_rw_pfwalk_check(struct test *test)
-{
- u64 *pte = npt_get_pte(read_cr3());
-
- *pte |= (1ULL << 1);
-
- return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
- && (test->vmcb->control.exit_info_1 == 0x200000006ULL)
- && (test->vmcb->control.exit_info_2 == read_cr3());
-}
-
-static void npt_rsvd_pfwalk_prepare(struct test *test)
-{
-
- vmcb_ident(test->vmcb);
-
- pdpe[0] |= (1ULL << 8);
-}
-
-static bool npt_rsvd_pfwalk_check(struct test *test)
-{
- pdpe[0] &= ~(1ULL << 8);
-
- return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
- && (test->vmcb->control.exit_info_1 == 0x20000000eULL);
-}
-
-static void npt_l1mmio_prepare(struct test *test)
-{
- vmcb_ident(test->vmcb);
-}
-
-u32 nested_apic_version1;
-u32 nested_apic_version2;
-
-static void npt_l1mmio_test(struct test *test)
-{
- volatile u32 *data = (volatile void*)(0xfee00030UL);
-
- nested_apic_version1 = *data;
- nested_apic_version2 = *data;
-}
-
-static bool npt_l1mmio_check(struct test *test)
-{
- volatile u32 *data = (volatile void*)(0xfee00030);
- u32 lvr = *data;
-
- return nested_apic_version1 == lvr && nested_apic_version2 == lvr;
-}
-
-static void npt_rw_l1mmio_prepare(struct test *test)
-{
-
- u64 *pte;
-
- vmcb_ident(test->vmcb);
- pte = npt_get_pte(0xfee00080);
-
- *pte &= ~(1ULL << 1);
-}
-
-static void npt_rw_l1mmio_test(struct test *test)
-{
- volatile u32 *data = (volatile void*)(0xfee00080);
-
- *data = *data;
-}
-
-static bool npt_rw_l1mmio_check(struct test *test)
-{
- u64 *pte = npt_get_pte(0xfee00080);
-
- *pte |= (1ULL << 1);
-
- return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
- && (test->vmcb->control.exit_info_1 == 0x100000007ULL);
-}
-
-#define TSC_ADJUST_VALUE (1ll << 32)
-#define TSC_OFFSET_VALUE (-1ll << 48)
-static bool ok;
-
-static void tsc_adjust_prepare(struct test *test)
-{
- default_prepare(test);
- test->vmcb->control.tsc_offset = TSC_OFFSET_VALUE;
-
- wrmsr(MSR_IA32_TSC_ADJUST, -TSC_ADJUST_VALUE);
- int64_t adjust = rdmsr(MSR_IA32_TSC_ADJUST);
- ok = adjust == -TSC_ADJUST_VALUE;
-}
-
-static void tsc_adjust_test(struct test *test)
-{
- int64_t adjust = rdmsr(MSR_IA32_TSC_ADJUST);
- ok &= adjust == -TSC_ADJUST_VALUE;
-
- uint64_t l1_tsc = rdtsc() - TSC_OFFSET_VALUE;
- wrmsr(MSR_IA32_TSC, l1_tsc - TSC_ADJUST_VALUE);
-
- adjust = rdmsr(MSR_IA32_TSC_ADJUST);
- ok &= adjust <= -2 * TSC_ADJUST_VALUE;
-
- uint64_t l1_tsc_end = rdtsc() - TSC_OFFSET_VALUE;
- ok &= (l1_tsc_end + TSC_ADJUST_VALUE - l1_tsc) < TSC_ADJUST_VALUE;
-
- uint64_t l1_tsc_msr = rdmsr(MSR_IA32_TSC) - TSC_OFFSET_VALUE;
- ok &= (l1_tsc_msr + TSC_ADJUST_VALUE - l1_tsc) < TSC_ADJUST_VALUE;
-}
-
-static bool tsc_adjust_check(struct test *test)
-{
- int64_t adjust = rdmsr(MSR_IA32_TSC_ADJUST);
-
- wrmsr(MSR_IA32_TSC_ADJUST, 0);
- return ok && adjust <= -2 * TSC_ADJUST_VALUE;
+ return this_cpu_has(X86_FEATURE_NPT);
}
-static void latency_prepare(struct test *test)
+int get_test_stage(struct svm_test *test)
{
- default_prepare(test);
- runs = LATENCY_RUNS;
- latvmrun_min = latvmexit_min = -1ULL;
- latvmrun_max = latvmexit_max = 0;
- vmrun_sum = vmexit_sum = 0;
+ barrier();
+ return test->scratch;
}
-static void latency_test(struct test *test)
+void set_test_stage(struct svm_test *test, int s)
{
- u64 cycles;
-
-start:
- tsc_end = rdtsc();
-
- cycles = tsc_end - tsc_start;
-
- if (cycles > latvmrun_max)
- latvmrun_max = cycles;
-
- if (cycles < latvmrun_min)
- latvmrun_min = cycles;
-
- vmrun_sum += cycles;
-
- tsc_start = rdtsc();
-
- asm volatile ("vmmcall" : : : "memory");
- goto start;
+ barrier();
+ test->scratch = s;
+ barrier();
}
-static bool latency_finished(struct test *test)
+void inc_test_stage(struct svm_test *test)
{
- u64 cycles;
-
- tsc_end = rdtsc();
-
- cycles = tsc_end - tsc_start;
-
- if (cycles > latvmexit_max)
- latvmexit_max = cycles;
-
- if (cycles < latvmexit_min)
- latvmexit_min = cycles;
-
- vmexit_sum += cycles;
-
- test->vmcb->save.rip += 3;
-
- runs -= 1;
-
- return runs == 0;
+ barrier();
+ test->scratch++;
+ barrier();
}
-static bool latency_check(struct test *test)
+static void vmcb_set_seg(struct vmcb_seg *seg, u16 selector,
+ u64 base, u32 limit, u32 attr)
{
- printf(" Latency VMRUN : max: %ld min: %ld avg: %ld\n", latvmrun_max,
- latvmrun_min, vmrun_sum / LATENCY_RUNS);
- printf(" Latency VMEXIT: max: %ld min: %ld avg: %ld\n", latvmexit_max,
- latvmexit_min, vmexit_sum / LATENCY_RUNS);
- return true;
+ seg->selector = selector;
+ seg->attrib = attr;
+ seg->limit = limit;
+ seg->base = base;
}
-static void lat_svm_insn_prepare(struct test *test)
+inline void vmmcall(void)
{
- default_prepare(test);
- runs = LATENCY_RUNS;
- latvmload_min = latvmsave_min = latstgi_min = latclgi_min = -1ULL;
- latvmload_max = latvmsave_max = latstgi_max = latclgi_max = 0;
- vmload_sum = vmsave_sum = stgi_sum = clgi_sum;
+ asm volatile ("vmmcall" : : : "memory");
}
-static bool lat_svm_insn_finished(struct test *test)
+static void test_thunk(struct svm_test *test)
{
- u64 vmcb_phys = virt_to_phys(test->vmcb);
- u64 cycles;
-
- for ( ; runs != 0; runs--) {
- tsc_start = rdtsc();
- asm volatile("vmload %0\n\t" : : "a"(vmcb_phys) : "memory");
- cycles = rdtsc() - tsc_start;
- if (cycles > latvmload_max)
- latvmload_max = cycles;
- if (cycles < latvmload_min)
- latvmload_min = cycles;
- vmload_sum += cycles;
-
- tsc_start = rdtsc();
- asm volatile("vmsave %0\n\t" : : "a"(vmcb_phys) : "memory");
- cycles = rdtsc() - tsc_start;
- if (cycles > latvmsave_max)
- latvmsave_max = cycles;
- if (cycles < latvmsave_min)
- latvmsave_min = cycles;
- vmsave_sum += cycles;
-
- tsc_start = rdtsc();
- asm volatile("stgi\n\t");
- cycles = rdtsc() - tsc_start;
- if (cycles > latstgi_max)
- latstgi_max = cycles;
- if (cycles < latstgi_min)
- latstgi_min = cycles;
- stgi_sum += cycles;
-
- tsc_start = rdtsc();
- asm volatile("clgi\n\t");
- cycles = rdtsc() - tsc_start;
- if (cycles > latclgi_max)
- latclgi_max = cycles;
- if (cycles < latclgi_min)
- latclgi_min = cycles;
- clgi_sum += cycles;
- }
-
- return true;
+ test->guest_func(test);
+ vmmcall();
}
-static bool lat_svm_insn_check(struct test *test)
-{
- printf(" Latency VMLOAD: max: %ld min: %ld avg: %ld\n", latvmload_max,
- latvmload_min, vmload_sum / LATENCY_RUNS);
- printf(" Latency VMSAVE: max: %ld min: %ld avg: %ld\n", latvmsave_max,
- latvmsave_min, vmsave_sum / LATENCY_RUNS);
- printf(" Latency STGI: max: %ld min: %ld avg: %ld\n", latstgi_max,
- latstgi_min, stgi_sum / LATENCY_RUNS);
- printf(" Latency CLGI: max: %ld min: %ld avg: %ld\n", latclgi_max,
- latclgi_min, clgi_sum / LATENCY_RUNS);
- return true;
-}
-
-bool pending_event_ipi_fired;
-bool pending_event_guest_run;
-
-static void pending_event_ipi_isr(isr_regs_t *regs)
-{
- pending_event_ipi_fired = true;
- eoi();
-}
-
-static void pending_event_prepare(struct test *test)
-{
- int ipi_vector = 0xf1;
-
- default_prepare(test);
-
- pending_event_ipi_fired = false;
-
- handle_irq(ipi_vector, pending_event_ipi_isr);
-
- pending_event_guest_run = false;
-
- test->vmcb->control.intercept |= (1ULL << INTERCEPT_INTR);
- test->vmcb->control.int_ctl |= V_INTR_MASKING_MASK;
-
- apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL |
- APIC_DM_FIXED | ipi_vector, 0);
+u8 *io_bitmap;
+u8 io_bitmap_area[16384];
- set_test_stage(test, 0);
-}
+u8 *msr_bitmap;
+u8 msr_bitmap_area[MSR_BITMAP_SIZE + PAGE_SIZE];
-static void pending_event_test(struct test *test)
-{
- pending_event_guest_run = true;
+void vmcb_ident(struct vmcb *vmcb)
+{
+ u64 vmcb_phys = virt_to_phys(vmcb);
+ struct vmcb_save_area *save = &vmcb->save;
+ struct vmcb_control_area *ctrl = &vmcb->control;
+ u32 data_seg_attr = 3 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK
+ | SVM_SELECTOR_DB_MASK | SVM_SELECTOR_G_MASK;
+ u32 code_seg_attr = 9 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK
+ | SVM_SELECTOR_L_MASK | SVM_SELECTOR_G_MASK;
+ struct descriptor_table_ptr desc_table_ptr;
+
+ memset(vmcb, 0, sizeof(*vmcb));
+ asm volatile ("vmsave %0" : : "a"(vmcb_phys) : "memory");
+ vmcb_set_seg(&save->es, read_es(), 0, -1U, data_seg_attr);
+ vmcb_set_seg(&save->cs, read_cs(), 0, -1U, code_seg_attr);
+ vmcb_set_seg(&save->ss, read_ss(), 0, -1U, data_seg_attr);
+ vmcb_set_seg(&save->ds, read_ds(), 0, -1U, data_seg_attr);
+ sgdt(&desc_table_ptr);
+ vmcb_set_seg(&save->gdtr, 0, desc_table_ptr.base, desc_table_ptr.limit, 0);
+ sidt(&desc_table_ptr);
+ vmcb_set_seg(&save->idtr, 0, desc_table_ptr.base, desc_table_ptr.limit, 0);
+ ctrl->asid = 1;
+ save->cpl = 0;
+ save->efer = rdmsr(MSR_EFER);
+ save->cr4 = read_cr4();
+ save->cr3 = read_cr3();
+ save->cr0 = read_cr0();
+ save->dr7 = read_dr7();
+ save->dr6 = read_dr6();
+ save->cr2 = read_cr2();
+ save->g_pat = rdmsr(MSR_IA32_CR_PAT);
+ save->dbgctl = rdmsr(MSR_IA32_DEBUGCTLMSR);
+ ctrl->intercept = (1ULL << INTERCEPT_VMRUN) | (1ULL << INTERCEPT_VMMCALL);
+ ctrl->iopm_base_pa = virt_to_phys(io_bitmap);
+ ctrl->msrpm_base_pa = virt_to_phys(msr_bitmap);
+
+ if (npt_supported()) {
+ ctrl->nested_ctl = 1;
+ ctrl->nested_cr3 = (u64)pml4e;
+ }
}
-static bool pending_event_finished(struct test *test)
-{
- switch (get_test_stage(test)) {
- case 0:
- if (test->vmcb->control.exit_code != SVM_EXIT_INTR) {
- report(false, "VMEXIT not due to pending interrupt. Exit reason 0x%x",
- test->vmcb->control.exit_code);
- return true;
- }
-
- test->vmcb->control.intercept &= ~(1ULL << INTERCEPT_INTR);
- test->vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
-
- if (pending_event_guest_run) {
- report(false, "Guest ran before host received IPI\n");
- return true;
- }
-
- irq_enable();
- asm volatile ("nop");
- irq_disable();
-
- if (!pending_event_ipi_fired) {
- report(false, "Pending interrupt not dispatched after IRQ enabled\n");
- return true;
- }
- break;
-
- case 1:
- if (!pending_event_guest_run) {
- report(false, "Guest did not resume when no interrupt\n");
- return true;
- }
- break;
- }
-
- inc_test_stage(test);
-
- return get_test_stage(test) == 2;
-}
+struct regs regs;
-static bool pending_event_check(struct test *test)
+struct regs get_regs(void)
{
- return get_test_stage(test) == 2;
+ return regs;
}
-static void pending_event_prepare_vmask(struct test *test)
-{
- default_prepare(test);
-
- pending_event_ipi_fired = false;
-
- handle_irq(0xf1, pending_event_ipi_isr);
+// rax handled specially below
- apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL |
- APIC_DM_FIXED | 0xf1, 0);
+#define SAVE_GPR_C \
+ "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"
- set_test_stage(test, 0);
-}
+#define LOAD_GPR_C SAVE_GPR_C
-static void pending_event_prepare_gif_clear_vmask(struct test *test)
-{
- asm("cli");
+static void test_run(struct svm_test *test, struct vmcb *vmcb)
+{
+ u64 vmcb_phys = virt_to_phys(vmcb);
+ u64 guest_stack[10000];
+
+ irq_disable();
+ test->vmcb = vmcb;
+ test->prepare(test);
+ vmcb->save.rip = (ulong)test_thunk;
+ vmcb->save.rsp = (ulong)(guest_stack + ARRAY_SIZE(guest_stack));
+ regs.rdi = (ulong)test;
+ do {
+ struct svm_test *the_test = test;
+ u64 the_vmcb = vmcb_phys;
+ asm volatile (
+ "clgi;\n\t" // semi-colon needed for LLVM compatibility
+ "sti \n\t"
+ "call *%c[PREPARE_GIF_CLEAR](%[test]) \n \t"
+ "mov %[vmcb_phys], %%rax \n\t"
+ "vmload %%rax\n\t"
+ "mov regs+0x80, %%r15\n\t" // rflags
+ "mov %%r15, 0x170(%%rax)\n\t"
+ "mov regs, %%r15\n\t" // rax
+ "mov %%r15, 0x1f8(%%rax)\n\t"
+ LOAD_GPR_C
+ "vmrun %%rax\n\t"
+ SAVE_GPR_C
+ "mov 0x170(%%rax), %%r15\n\t" // rflags
+ "mov %%r15, regs+0x80\n\t"
+ "mov 0x1f8(%%rax), %%r15\n\t" // rax
+ "mov %%r15, regs\n\t"
+ "vmsave %%rax\n\t"
+ "cli \n\t"
+ "stgi"
+ : // inputs clobbered by the guest:
+ "+D" (the_test), // first argument register
+ "+b" (the_vmcb) // callee save register!
+ : [test] "0" (the_test),
+ [vmcb_phys] "1"(the_vmcb),
+ [PREPARE_GIF_CLEAR] "i" (offsetof(struct svm_test, prepare_gif_clear))
+ : "rax", "rcx", "rdx", "rsi",
+ "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15",
+ "memory");
+ ++test->exits;
+ } while (!test->finished(test));
+ irq_enable();
+
+ report(test->succeeded(test), "%s", test->name);
}
-static void pending_event_test_vmask(struct test *test)
+static void setup_svm(void)
{
- if (pending_event_ipi_fired == true) {
- set_test_stage(test, -1);
- report(false, "Interrupt preceeded guest");
- vmmcall();
- }
+ void *hsave = alloc_page();
+ u64 *page, address;
+ int i,j;
- irq_enable();
- asm volatile ("nop");
- irq_disable();
+ wrmsr(MSR_VM_HSAVE_PA, virt_to_phys(hsave));
+ wrmsr(MSR_EFER, rdmsr(MSR_EFER) | EFER_SVME);
+ wrmsr(MSR_EFER, rdmsr(MSR_EFER) | EFER_NX);
- if (pending_event_ipi_fired != true) {
- set_test_stage(test, -1);
- report(false, "Interrupt not triggered by guest");
- }
+ io_bitmap = (void *) (((ulong)io_bitmap_area + 4095) & ~4095);
- vmmcall();
+ msr_bitmap = (void *) ALIGN((ulong)msr_bitmap_area, PAGE_SIZE);
- irq_enable();
- asm volatile ("nop");
- irq_disable();
-}
-
-static bool pending_event_finished_vmask(struct test *test)
-{
- if ( test->vmcb->control.exit_code != SVM_EXIT_VMMCALL) {
- report(false, "VM_EXIT return to host is not EXIT_VMMCALL exit reason 0x%x",
- test->vmcb->control.exit_code);
- return true;
- }
-
- switch (get_test_stage(test)) {
- case 0:
- test->vmcb->save.rip += 3;
+ if (!npt_supported())
+ return;
- pending_event_ipi_fired = false;
+ printf("NPT detected - running all tests with NPT enabled\n");
- test->vmcb->control.int_ctl |= V_INTR_MASKING_MASK;
+ /*
+ * Nested paging supported - Build a nested page table
+ * Build the page-table bottom-up and map everything with 4k
+ * pages to get enough granularity for the NPT unit-tests.
+ */
- apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL |
- APIC_DM_FIXED | 0xf1, 0);
+ address = 0;
- break;
+ /* PTE level */
+ for (i = 0; i < 2048; ++i) {
+ page = alloc_page();
- case 1:
- if (pending_event_ipi_fired == true) {
- report(false, "Interrupt triggered by guest");
- return true;
- }
+ for (j = 0; j < 512; ++j, address += 4096)
+ page[j] = address | 0x067ULL;
- irq_enable();
- asm volatile ("nop");
- irq_disable();
+ pte[i] = page;
+ }
- if (pending_event_ipi_fired != true) {
- report(false, "Interrupt not triggered by host");
- return true;
- }
+ /* PDE level */
+ for (i = 0; i < 4; ++i) {
+ page = alloc_page();
- break;
+ for (j = 0; j < 512; ++j)
+ page[j] = (u64)pte[(i * 512) + j] | 0x027ULL;
- default:
- return true;
- }
+ pde[i] = page;
+ }
- inc_test_stage(test);
+ /* PDPe level */
+ pdpe = alloc_page();
+ for (i = 0; i < 4; ++i)
+ pdpe[i] = ((u64)(pde[i])) | 0x27;
- return get_test_stage(test) == 2;
-}
-
-static bool pending_event_check_vmask(struct test *test)
-{
- return get_test_stage(test) == 2;
+ /* PML4e level */
+ pml4e = alloc_page();
+ pml4e[0] = ((u64)pdpe) | 0x27;
}
-static struct test tests[] = {
- { "null", default_supported, default_prepare,
- default_prepare_gif_clear, null_test,
- default_finished, null_check },
- { "vmrun", default_supported, default_prepare,
- default_prepare_gif_clear, test_vmrun,
- default_finished, check_vmrun },
- { "ioio", default_supported, prepare_ioio,
- default_prepare_gif_clear, test_ioio,
- ioio_finished, check_ioio },
- { "vmrun intercept check", default_supported, prepare_no_vmrun_int,
- default_prepare_gif_clear, null_test, default_finished,
- check_no_vmrun_int },
- { "cr3 read intercept", default_supported,
- prepare_cr3_intercept, default_prepare_gif_clear,
- test_cr3_intercept, default_finished, check_cr3_intercept },
- { "cr3 read nointercept", default_supported, default_prepare,
- default_prepare_gif_clear, test_cr3_intercept, default_finished,
- check_cr3_nointercept },
- { "cr3 read intercept emulate", smp_supported,
- prepare_cr3_intercept_bypass, default_prepare_gif_clear,
- test_cr3_intercept_bypass, default_finished, check_cr3_intercept },
- { "dr intercept check", default_supported, prepare_dr_intercept,
- default_prepare_gif_clear, test_dr_intercept, dr_intercept_finished,
- check_dr_intercept },
- { "next_rip", next_rip_supported, prepare_next_rip,
- default_prepare_gif_clear, test_next_rip,
- default_finished, check_next_rip },
- { "msr intercept check", default_supported, prepare_msr_intercept,
- default_prepare_gif_clear, test_msr_intercept,
- msr_intercept_finished, check_msr_intercept },
- { "mode_switch", default_supported, prepare_mode_switch,
- default_prepare_gif_clear, test_mode_switch,
- mode_switch_finished, check_mode_switch },
- { "asid_zero", default_supported, prepare_asid_zero,
- default_prepare_gif_clear, test_asid_zero,
- default_finished, check_asid_zero },
- { "sel_cr0_bug", default_supported, sel_cr0_bug_prepare,
- default_prepare_gif_clear, sel_cr0_bug_test,
- sel_cr0_bug_finished, sel_cr0_bug_check },
- { "npt_nx", npt_supported, npt_nx_prepare,
- default_prepare_gif_clear, null_test,
- default_finished, npt_nx_check },
- { "npt_us", npt_supported, npt_us_prepare,
- default_prepare_gif_clear, npt_us_test,
- default_finished, npt_us_check },
- { "npt_rsvd", npt_supported, npt_rsvd_prepare,
- default_prepare_gif_clear, null_test,
- default_finished, npt_rsvd_check },
- { "npt_rw", npt_supported, npt_rw_prepare,
- default_prepare_gif_clear, npt_rw_test,
- default_finished, npt_rw_check },
- { "npt_rsvd_pfwalk", npt_supported, npt_rsvd_pfwalk_prepare,
- default_prepare_gif_clear, null_test,
- default_finished, npt_rsvd_pfwalk_check },
- { "npt_rw_pfwalk", npt_supported, npt_rw_pfwalk_prepare,
- default_prepare_gif_clear, null_test,
- default_finished, npt_rw_pfwalk_check },
- { "npt_l1mmio", npt_supported, npt_l1mmio_prepare,
- default_prepare_gif_clear, npt_l1mmio_test,
- default_finished, npt_l1mmio_check },
- { "npt_rw_l1mmio", npt_supported, npt_rw_l1mmio_prepare,
- default_prepare_gif_clear, npt_rw_l1mmio_test,
- default_finished, npt_rw_l1mmio_check },
- { "tsc_adjust", default_supported, tsc_adjust_prepare,
- default_prepare_gif_clear, tsc_adjust_test,
- default_finished, tsc_adjust_check },
- { "latency_run_exit", default_supported, latency_prepare,
- default_prepare_gif_clear, latency_test,
- latency_finished, latency_check },
- { "latency_svm_insn", default_supported, lat_svm_insn_prepare,
- default_prepare_gif_clear, null_test,
- lat_svm_insn_finished, lat_svm_insn_check },
- { "pending_event", default_supported, pending_event_prepare,
- default_prepare_gif_clear,
- pending_event_test, pending_event_finished, pending_event_check },
- { "pending_event_vmask", default_supported, pending_event_prepare_vmask,
- pending_event_prepare_gif_clear_vmask,
- pending_event_test_vmask, pending_event_finished_vmask,
- pending_event_check_vmask },
-};
+extern struct svm_test svm_tests[];
int main(int ac, char **av)
{
- int i, nr;
- struct vmcb *vmcb;
+ int i = 0;
+ struct vmcb *vmcb;
- setup_vm();
- smp_init();
+ setup_vm();
+ smp_init();
- if (!this_cpu_has(X86_FEATURE_SVM)) {
- printf("SVM not availble\n");
- return report_summary();
- }
+ if (!this_cpu_has(X86_FEATURE_SVM)) {
+ printf("SVM not availble\n");
+ return report_summary();
+ }
- setup_svm();
+ setup_svm();
- vmcb = alloc_page();
+ vmcb = alloc_page();
- nr = ARRAY_SIZE(tests);
- for (i = 0; i < nr; ++i) {
- if (!tests[i].supported())
- continue;
- test_run(&tests[i], vmcb);
- }
+ for (; svm_tests[i].name != NULL; i++) {
+ if (!svm_tests[i].supported())
+ continue;
+ test_run(&svm_tests[i], vmcb);
+ }
- return report_summary();
+ return report_summary();
}
diff --git a/x86/svm.h b/x86/svm.h
index 3fdc0d3..ccc5172 100644
--- a/x86/svm.h
+++ b/x86/svm.h
@@ -324,5 +324,55 @@ struct __attribute__ ((__packed__)) vmcb {
#define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP)
-#endif
+#define MSR_BITMAP_SIZE 8192
+
+struct svm_test {
+ const char *name;
+ bool (*supported)(void);
+ void (*prepare)(struct svm_test *test);
+ void (*prepare_gif_clear)(struct svm_test *test);
+ void (*guest_func)(struct svm_test *test);
+ bool (*finished)(struct svm_test *test);
+ bool (*succeeded)(struct svm_test *test);
+ struct vmcb *vmcb;
+ int exits;
+ ulong scratch;
+};
+struct regs {
+ u64 rax;
+ u64 rbx;
+ u64 rcx;
+ u64 rdx;
+ 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;
+};
+
+u64 *npt_get_pte(u64 address);
+u64 *npt_get_pde(u64 address);
+u64 *npt_get_pdpe(void);
+bool smp_supported(void);
+bool default_supported(void);
+void default_prepare(struct svm_test *test);
+void default_prepare_gif_clear(struct svm_test *test);
+bool default_finished(struct svm_test *test);
+bool npt_supported(void);
+int get_test_stage(struct svm_test *test);
+void set_test_stage(struct svm_test *test, int s);
+void inc_test_stage(struct svm_test *test);
+void vmcb_ident(struct vmcb *vmcb);
+struct regs get_regs(void);
+void vmmcall(void);
+
+#endif
diff --git a/x86/svm_tests.c b/x86/svm_tests.c
new file mode 100644
index 0000000..264f8de
--- /dev/null
+++ b/x86/svm_tests.c
@@ -0,0 +1,1279 @@
+#include "svm.h"
+#include "libcflat.h"
+#include "processor.h"
+#include "desc.h"
+#include "msr.h"
+#include "vm.h"
+#include "smp.h"
+#include "types.h"
+#include "alloc_page.h"
+#include "isr.h"
+#include "apic.h"
+
+#define SVM_EXIT_MAX_DR_INTERCEPT 0x3f
+
+static void *scratch_page;
+
+#define LATENCY_RUNS 1000000
+
+u64 tsc_start;
+u64 tsc_end;
+
+u64 vmrun_sum, vmexit_sum;
+u64 vmsave_sum, vmload_sum;
+u64 stgi_sum, clgi_sum;
+u64 latvmrun_max;
+u64 latvmrun_min;
+u64 latvmexit_max;
+u64 latvmexit_min;
+u64 latvmload_max;
+u64 latvmload_min;
+u64 latvmsave_max;
+u64 latvmsave_min;
+u64 latstgi_max;
+u64 latstgi_min;
+u64 latclgi_max;
+u64 latclgi_min;
+u64 runs;
+
+static void null_test(struct svm_test *test)
+{
+}
+
+static bool null_check(struct svm_test *test)
+{
+ return test->vmcb->control.exit_code == SVM_EXIT_VMMCALL;
+}
+
+static void prepare_no_vmrun_int(struct svm_test *test)
+{
+ test->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMRUN);
+}
+
+static bool check_no_vmrun_int(struct svm_test *test)
+{
+ return test->vmcb->control.exit_code == SVM_EXIT_ERR;
+}
+
+static void test_vmrun(struct svm_test *test)
+{
+ asm volatile ("vmrun %0" : : "a"(virt_to_phys(test->vmcb)));
+}
+
+static bool check_vmrun(struct svm_test *test)
+{
+ return test->vmcb->control.exit_code == SVM_EXIT_VMRUN;
+}
+
+static void prepare_cr3_intercept(struct svm_test *test)
+{
+ default_prepare(test);
+ test->vmcb->control.intercept_cr_read |= 1 << 3;
+}
+
+static void test_cr3_intercept(struct svm_test *test)
+{
+ asm volatile ("mov %%cr3, %0" : "=r"(test->scratch) : : "memory");
+}
+
+static bool check_cr3_intercept(struct svm_test *test)
+{
+ return test->vmcb->control.exit_code == SVM_EXIT_READ_CR3;
+}
+
+static bool check_cr3_nointercept(struct svm_test *test)
+{
+ return null_check(test) && test->scratch == read_cr3();
+}
+
+static void corrupt_cr3_intercept_bypass(void *_test)
+{
+ struct svm_test *test = _test;
+ extern volatile u32 mmio_insn;
+
+ while (!__sync_bool_compare_and_swap(&test->scratch, 1, 2))
+ pause();
+ pause();
+ pause();
+ pause();
+ mmio_insn = 0x90d8200f; // mov %cr3, %rax; nop
+}
+
+static void prepare_cr3_intercept_bypass(struct svm_test *test)
+{
+ default_prepare(test);
+ test->vmcb->control.intercept_cr_read |= 1 << 3;
+ on_cpu_async(1, corrupt_cr3_intercept_bypass, test);
+}
+
+static void test_cr3_intercept_bypass(struct svm_test *test)
+{
+ ulong a = 0xa0000;
+
+ test->scratch = 1;
+ while (test->scratch != 2)
+ barrier();
+
+ asm volatile ("mmio_insn: mov %0, (%0); nop"
+ : "+a"(a) : : "memory");
+ test->scratch = a;
+}
+
+static void prepare_dr_intercept(struct svm_test *test)
+{
+ default_prepare(test);
+ test->vmcb->control.intercept_dr_read = 0xff;
+ test->vmcb->control.intercept_dr_write = 0xff;
+}
+
+static void test_dr_intercept(struct svm_test *test)
+{
+ unsigned int i, failcnt = 0;
+
+ /* Loop testing debug register reads */
+ for (i = 0; i < 8; i++) {
+
+ switch (i) {
+ case 0:
+ asm volatile ("mov %%dr0, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ case 1:
+ asm volatile ("mov %%dr1, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ case 2:
+ asm volatile ("mov %%dr2, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ case 3:
+ asm volatile ("mov %%dr3, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ case 4:
+ asm volatile ("mov %%dr4, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ case 5:
+ asm volatile ("mov %%dr5, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ case 6:
+ asm volatile ("mov %%dr6, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ case 7:
+ asm volatile ("mov %%dr7, %0" : "=r"(test->scratch) : : "memory");
+ break;
+ }
+
+ if (test->scratch != i) {
+ report(false, "dr%u read intercept", i);
+ failcnt++;
+ }
+ }
+
+ /* Loop testing debug register writes */
+ for (i = 0; i < 8; i++) {
+
+ switch (i) {
+ case 0:
+ asm volatile ("mov %0, %%dr0" : : "r"(test->scratch) : "memory");
+ break;
+ case 1:
+ asm volatile ("mov %0, %%dr1" : : "r"(test->scratch) : "memory");
+ break;
+ case 2:
+ asm volatile ("mov %0, %%dr2" : : "r"(test->scratch) : "memory");
+ break;
+ case 3:
+ asm volatile ("mov %0, %%dr3" : : "r"(test->scratch) : "memory");
+ break;
+ case 4:
+ asm volatile ("mov %0, %%dr4" : : "r"(test->scratch) : "memory");
+ break;
+ case 5:
+ asm volatile ("mov %0, %%dr5" : : "r"(test->scratch) : "memory");
+ break;
+ case 6:
+ asm volatile ("mov %0, %%dr6" : : "r"(test->scratch) : "memory");
+ break;
+ case 7:
+ asm volatile ("mov %0, %%dr7" : : "r"(test->scratch) : "memory");
+ break;
+ }
+
+ if (test->scratch != i) {
+ report(false, "dr%u write intercept", i);
+ failcnt++;
+ }
+ }
+
+ test->scratch = failcnt;
+}
+
+static bool dr_intercept_finished(struct svm_test *test)
+{
+ ulong n = (test->vmcb->control.exit_code - SVM_EXIT_READ_DR0);
+
+ /* Only expect DR intercepts */
+ if (n > (SVM_EXIT_MAX_DR_INTERCEPT - SVM_EXIT_READ_DR0))
+ return true;
+
+ /*
+ * Compute debug register number.
+ * Per Appendix C "SVM Intercept Exit Codes" of AMD64 Architecture
+ * Programmer's Manual Volume 2 - System Programming:
+ * http://support.amd.com/TechDocs/24593.pdf
+ * there are 16 VMEXIT codes each for DR read and write.
+ */
+ test->scratch = (n % 16);
+
+ /* Jump over MOV instruction */
+ test->vmcb->save.rip += 3;
+
+ return false;
+}
+
+static bool check_dr_intercept(struct svm_test *test)
+{
+ return !test->scratch;
+}
+
+static bool next_rip_supported(void)
+{
+ return this_cpu_has(X86_FEATURE_NRIPS);
+}
+
+static void prepare_next_rip(struct svm_test *test)
+{
+ test->vmcb->control.intercept |= (1ULL << INTERCEPT_RDTSC);
+}
+
+
+static void test_next_rip(struct svm_test *test)
+{
+ asm volatile ("rdtsc\n\t"
+ ".globl exp_next_rip\n\t"
+ "exp_next_rip:\n\t" ::: "eax", "edx");
+}
+
+static bool check_next_rip(struct svm_test *test)
+{
+ extern char exp_next_rip;
+ unsigned long address = (unsigned long)&exp_next_rip;
+
+ return address == test->vmcb->control.next_rip;
+}
+
+extern u8 *msr_bitmap;
+
+static void prepare_msr_intercept(struct svm_test *test)
+{
+ default_prepare(test);
+ test->vmcb->control.intercept |= (1ULL << INTERCEPT_MSR_PROT);
+ test->vmcb->control.intercept_exceptions |= (1ULL << GP_VECTOR);
+ memset(msr_bitmap, 0xff, MSR_BITMAP_SIZE);
+}
+
+static void test_msr_intercept(struct svm_test *test)
+{
+ unsigned long msr_value = 0xef8056791234abcd; /* Arbitrary value */
+ unsigned long msr_index;
+
+ for (msr_index = 0; msr_index <= 0xc0011fff; msr_index++) {
+ if (msr_index == 0xC0010131 /* MSR_SEV_STATUS */) {
+ /*
+ * Per section 15.34.10 "SEV_STATUS MSR" of AMD64 Architecture
+ * Programmer's Manual volume 2 - System Programming:
+ * http://support.amd.com/TechDocs/24593.pdf
+ * SEV_STATUS MSR (C001_0131) is a non-interceptable MSR.
+ */
+ continue;
+ }
+
+ /* Skips gaps between supported MSR ranges */
+ if (msr_index == 0x2000)
+ msr_index = 0xc0000000;
+ else if (msr_index == 0xc0002000)
+ msr_index = 0xc0010000;
+
+ test->scratch = -1;
+
+ rdmsr(msr_index);
+
+ /* Check that a read intercept occurred for MSR at msr_index */
+ if (test->scratch != msr_index)
+ report(false, "MSR 0x%lx read intercept", msr_index);
+
+ /*
+ * Poor man approach to generate a value that
+ * seems arbitrary each time around the loop.
+ */
+ msr_value += (msr_value << 1);
+
+ wrmsr(msr_index, msr_value);
+
+ /* Check that a write intercept occurred for MSR with msr_value */
+ if (test->scratch != msr_value)
+ report(false, "MSR 0x%lx write intercept", msr_index);
+ }
+
+ test->scratch = -2;
+}
+
+static bool msr_intercept_finished(struct svm_test *test)
+{
+ u32 exit_code = test->vmcb->control.exit_code;
+ u64 exit_info_1;
+ u8 *opcode;
+
+ if (exit_code == SVM_EXIT_MSR) {
+ exit_info_1 = test->vmcb->control.exit_info_1;
+ } else {
+ /*
+ * If #GP exception occurs instead, check that it was
+ * for RDMSR/WRMSR and set exit_info_1 accordingly.
+ */
+
+ if (exit_code != (SVM_EXIT_EXCP_BASE + GP_VECTOR))
+ return true;
+
+ opcode = (u8 *)test->vmcb->save.rip;
+ if (opcode[0] != 0x0f)
+ return true;
+
+ switch (opcode[1]) {
+ case 0x30: /* WRMSR */
+ exit_info_1 = 1;
+ break;
+ case 0x32: /* RDMSR */
+ exit_info_1 = 0;
+ break;
+ default:
+ return true;
+ }
+
+ /*
+ * Warn that #GP exception occured instead.
+ * RCX holds the MSR index.
+ */
+ printf("%s 0x%lx #GP exception\n",
+ exit_info_1 ? "WRMSR" : "RDMSR", get_regs().rcx);
+ }
+
+ /* Jump over RDMSR/WRMSR instruction */
+ test->vmcb->save.rip += 2;
+
+ /*
+ * Test whether the intercept was for RDMSR/WRMSR.
+ * For RDMSR, test->scratch is set to the MSR index;
+ * RCX holds the MSR index.
+ * For WRMSR, test->scratch is set to the MSR value;
+ * RDX holds the upper 32 bits of the MSR value,
+ * while RAX hold its lower 32 bits.
+ */
+ if (exit_info_1)
+ test->scratch =
+ ((get_regs().rdx << 32) | (test->vmcb->save.rax & 0xffffffff));
+ else
+ test->scratch = get_regs().rcx;
+
+ return false;
+}
+
+static bool check_msr_intercept(struct svm_test *test)
+{
+ memset(msr_bitmap, 0, MSR_BITMAP_SIZE);
+ return (test->scratch == -2);
+}
+
+static void prepare_mode_switch(struct svm_test *test)
+{
+ test->vmcb->control.intercept_exceptions |= (1ULL << GP_VECTOR)
+ | (1ULL << UD_VECTOR)
+ | (1ULL << DF_VECTOR)
+ | (1ULL << PF_VECTOR);
+ test->scratch = 0;
+}
+
+static void test_mode_switch(struct svm_test *test)
+{
+ asm volatile(" cli\n"
+ " ljmp *1f\n" /* jump to 32-bit code segment */
+ "1:\n"
+ " .long 2f\n"
+ " .long " xstr(KERNEL_CS32) "\n"
+ ".code32\n"
+ "2:\n"
+ " movl %%cr0, %%eax\n"
+ " btcl $31, %%eax\n" /* clear PG */
+ " movl %%eax, %%cr0\n"
+ " movl $0xc0000080, %%ecx\n" /* EFER */
+ " rdmsr\n"
+ " btcl $8, %%eax\n" /* clear LME */
+ " wrmsr\n"
+ " movl %%cr4, %%eax\n"
+ " btcl $5, %%eax\n" /* clear PAE */
+ " movl %%eax, %%cr4\n"
+ " movw %[ds16], %%ax\n"
+ " movw %%ax, %%ds\n"
+ " ljmpl %[cs16], $3f\n" /* jump to 16 bit protected-mode */
+ ".code16\n"
+ "3:\n"
+ " movl %%cr0, %%eax\n"
+ " btcl $0, %%eax\n" /* clear PE */
+ " movl %%eax, %%cr0\n"
+ " ljmpl $0, $4f\n" /* jump to real-mode */
+ "4:\n"
+ " vmmcall\n"
+ " movl %%cr0, %%eax\n"
+ " btsl $0, %%eax\n" /* set PE */
+ " movl %%eax, %%cr0\n"
+ " ljmpl %[cs32], $5f\n" /* back to protected mode */
+ ".code32\n"
+ "5:\n"
+ " movl %%cr4, %%eax\n"
+ " btsl $5, %%eax\n" /* set PAE */
+ " movl %%eax, %%cr4\n"
+ " movl $0xc0000080, %%ecx\n" /* EFER */
+ " rdmsr\n"
+ " btsl $8, %%eax\n" /* set LME */
+ " wrmsr\n"
+ " movl %%cr0, %%eax\n"
+ " btsl $31, %%eax\n" /* set PG */
+ " movl %%eax, %%cr0\n"
+ " ljmpl %[cs64], $6f\n" /* back to long mode */
+ ".code64\n\t"
+ "6:\n"
+ " vmmcall\n"
+ :: [cs16] "i"(KERNEL_CS16), [ds16] "i"(KERNEL_DS16),
+ [cs32] "i"(KERNEL_CS32), [cs64] "i"(KERNEL_CS64)
+ : "rax", "rbx", "rcx", "rdx", "memory");
+}
+
+static bool mode_switch_finished(struct svm_test *test)
+{
+ u64 cr0, cr4, efer;
+
+ cr0 = test->vmcb->save.cr0;
+ cr4 = test->vmcb->save.cr4;
+ efer = test->vmcb->save.efer;
+
+ /* Only expect VMMCALL intercepts */
+ if (test->vmcb->control.exit_code != SVM_EXIT_VMMCALL)
+ return true;
+
+ /* Jump over VMMCALL instruction */
+ test->vmcb->save.rip += 3;
+
+ /* Do sanity checks */
+ switch (test->scratch) {
+ case 0:
+ /* Test should be in real mode now - check for this */
+ if ((cr0 & 0x80000001) || /* CR0.PG, CR0.PE */
+ (cr4 & 0x00000020) || /* CR4.PAE */
+ (efer & 0x00000500)) /* EFER.LMA, EFER.LME */
+ return true;
+ break;
+ case 2:
+ /* Test should be back in long-mode now - check for this */
+ if (((cr0 & 0x80000001) != 0x80000001) || /* CR0.PG, CR0.PE */
+ ((cr4 & 0x00000020) != 0x00000020) || /* CR4.PAE */
+ ((efer & 0x00000500) != 0x00000500)) /* EFER.LMA, EFER.LME */
+ return true;
+ break;
+ }
+
+ /* one step forward */
+ test->scratch += 1;
+
+ return test->scratch == 2;
+}
+
+static bool check_mode_switch(struct svm_test *test)
+{
+ return test->scratch == 2;
+}
+
+extern u8 *io_bitmap;
+
+static void prepare_ioio(struct svm_test *test)
+{
+ test->vmcb->control.intercept |= (1ULL << INTERCEPT_IOIO_PROT);
+ test->scratch = 0;
+ memset(io_bitmap, 0, 8192);
+ io_bitmap[8192] = 0xFF;
+}
+
+static void test_ioio(struct svm_test *test)
+{
+ // stage 0, test IO pass
+ inb(0x5000);
+ outb(0x0, 0x5000);
+ if (get_test_stage(test) != 0)
+ goto fail;
+
+ // test IO width, in/out
+ io_bitmap[0] = 0xFF;
+ inc_test_stage(test);
+ inb(0x0);
+ if (get_test_stage(test) != 2)
+ goto fail;
+
+ outw(0x0, 0x0);
+ if (get_test_stage(test) != 3)
+ goto fail;
+
+ inl(0x0);
+ if (get_test_stage(test) != 4)
+ goto fail;
+
+ // test low/high IO port
+ io_bitmap[0x5000 / 8] = (1 << (0x5000 % 8));
+ inb(0x5000);
+ if (get_test_stage(test) != 5)
+ goto fail;
+
+ io_bitmap[0x9000 / 8] = (1 << (0x9000 % 8));
+ inw(0x9000);
+ if (get_test_stage(test) != 6)
+ goto fail;
+
+ // test partial pass
+ io_bitmap[0x5000 / 8] = (1 << (0x5000 % 8));
+ inl(0x4FFF);
+ if (get_test_stage(test) != 7)
+ goto fail;
+
+ // test across pages
+ inc_test_stage(test);
+ inl(0x7FFF);
+ if (get_test_stage(test) != 8)
+ goto fail;
+
+ inc_test_stage(test);
+ io_bitmap[0x8000 / 8] = 1 << (0x8000 % 8);
+ inl(0x7FFF);
+ if (get_test_stage(test) != 10)
+ goto fail;
+
+ io_bitmap[0] = 0;
+ inl(0xFFFF);
+ if (get_test_stage(test) != 11)
+ goto fail;
+
+ io_bitmap[0] = 0xFF;
+ io_bitmap[8192] = 0;
+ inl(0xFFFF);
+ inc_test_stage(test);
+ if (get_test_stage(test) != 12)
+ goto fail;
+
+ return;
+
+fail:
+ report(false, "stage %d", get_test_stage(test));
+ test->scratch = -1;
+}
+
+static bool ioio_finished(struct svm_test *test)
+{
+ unsigned port, size;
+
+ /* Only expect IOIO intercepts */
+ if (test->vmcb->control.exit_code == SVM_EXIT_VMMCALL)
+ return true;
+
+ if (test->vmcb->control.exit_code != SVM_EXIT_IOIO)
+ return true;
+
+ /* one step forward */
+ test->scratch += 1;
+
+ port = test->vmcb->control.exit_info_1 >> 16;
+ size = (test->vmcb->control.exit_info_1 >> SVM_IOIO_SIZE_SHIFT) & 7;
+
+ while (size--) {
+ io_bitmap[port / 8] &= ~(1 << (port & 7));
+ port++;
+ }
+
+ return false;
+}
+
+static bool check_ioio(struct svm_test *test)
+{
+ memset(io_bitmap, 0, 8193);
+ return test->scratch != -1;
+}
+
+static void prepare_asid_zero(struct svm_test *test)
+{
+ test->vmcb->control.asid = 0;
+}
+
+static void test_asid_zero(struct svm_test *test)
+{
+ asm volatile ("vmmcall\n\t");
+}
+
+static bool check_asid_zero(struct svm_test *test)
+{
+ return test->vmcb->control.exit_code == SVM_EXIT_ERR;
+}
+
+static void sel_cr0_bug_prepare(struct svm_test *test)
+{
+ vmcb_ident(test->vmcb);
+ test->vmcb->control.intercept |= (1ULL << INTERCEPT_SELECTIVE_CR0);
+}
+
+static bool sel_cr0_bug_finished(struct svm_test *test)
+{
+ return true;
+}
+
+static void sel_cr0_bug_test(struct svm_test *test)
+{
+ unsigned long cr0;
+
+ /* read cr0, clear CD, and write back */
+ cr0 = read_cr0();
+ cr0 |= (1UL << 30);
+ write_cr0(cr0);
+
+ /*
+ * If we are here the test failed, not sure what to do now because we
+ * are not in guest-mode anymore so we can't trigger an intercept.
+ * Trigger a tripple-fault for now.
+ */
+ report(false, "sel_cr0 test. Can not recover from this - exiting");
+ exit(report_summary());
+}
+
+static bool sel_cr0_bug_check(struct svm_test *test)
+{
+ return test->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE;
+}
+
+static void npt_nx_prepare(struct svm_test *test)
+{
+
+ u64 *pte;
+
+ vmcb_ident(test->vmcb);
+ pte = npt_get_pte((u64)null_test);
+
+ *pte |= (1ULL << 63);
+}
+
+static bool npt_nx_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte((u64)null_test);
+
+ *pte &= ~(1ULL << 63);
+
+ test->vmcb->save.efer |= (1 << 11);
+
+ return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (test->vmcb->control.exit_info_1 == 0x100000015ULL);
+}
+
+static void npt_us_prepare(struct svm_test *test)
+{
+ u64 *pte;
+
+ scratch_page = alloc_page();
+ vmcb_ident(test->vmcb);
+ pte = npt_get_pte((u64)scratch_page);
+
+ *pte &= ~(1ULL << 2);
+}
+
+static void npt_us_test(struct svm_test *test)
+{
+ (void) *(volatile u64 *)scratch_page;
+}
+
+static bool npt_us_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte((u64)scratch_page);
+
+ *pte |= (1ULL << 2);
+
+ return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (test->vmcb->control.exit_info_1 == 0x100000005ULL);
+}
+
+u64 save_pde;
+
+static void npt_rsvd_prepare(struct svm_test *test)
+{
+ u64 *pde;
+
+ vmcb_ident(test->vmcb);
+ pde = npt_get_pde((u64) null_test);
+
+ save_pde = *pde;
+ *pde = (1ULL << 19) | (1ULL << 7) | 0x27;
+}
+
+static bool npt_rsvd_check(struct svm_test *test)
+{
+ u64 *pde = npt_get_pde((u64) null_test);
+
+ *pde = save_pde;
+
+ return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (test->vmcb->control.exit_info_1 == 0x10000001dULL);
+}
+
+static void npt_rw_prepare(struct svm_test *test)
+{
+
+ u64 *pte;
+
+ vmcb_ident(test->vmcb);
+ pte = npt_get_pte(0x80000);
+
+ *pte &= ~(1ULL << 1);
+}
+
+static void npt_rw_test(struct svm_test *test)
+{
+ u64 *data = (void*)(0x80000);
+
+ *data = 0;
+}
+
+static bool npt_rw_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte(0x80000);
+
+ *pte |= (1ULL << 1);
+
+ return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (test->vmcb->control.exit_info_1 == 0x100000007ULL);
+}
+
+static void npt_rw_pfwalk_prepare(struct svm_test *test)
+{
+
+ u64 *pte;
+
+ vmcb_ident(test->vmcb);
+ pte = npt_get_pte(read_cr3());
+
+ *pte &= ~(1ULL << 1);
+}
+
+static bool npt_rw_pfwalk_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte(read_cr3());
+
+ *pte |= (1ULL << 1);
+
+ return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (test->vmcb->control.exit_info_1 == 0x200000006ULL)
+ && (test->vmcb->control.exit_info_2 == read_cr3());
+}
+
+static void npt_rsvd_pfwalk_prepare(struct svm_test *test)
+{
+ u64 *pdpe;
+ vmcb_ident(test->vmcb);
+
+ pdpe = npt_get_pdpe();
+ pdpe[0] |= (1ULL << 8);
+}
+
+static bool npt_rsvd_pfwalk_check(struct svm_test *test)
+{
+ u64 *pdpe = npt_get_pdpe();
+ pdpe[0] &= ~(1ULL << 8);
+
+ return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (test->vmcb->control.exit_info_1 == 0x20000000eULL);
+}
+
+static void npt_l1mmio_prepare(struct svm_test *test)
+{
+ vmcb_ident(test->vmcb);
+}
+
+u32 nested_apic_version1;
+u32 nested_apic_version2;
+
+static void npt_l1mmio_test(struct svm_test *test)
+{
+ volatile u32 *data = (volatile void*)(0xfee00030UL);
+
+ nested_apic_version1 = *data;
+ nested_apic_version2 = *data;
+}
+
+static bool npt_l1mmio_check(struct svm_test *test)
+{
+ volatile u32 *data = (volatile void*)(0xfee00030);
+ u32 lvr = *data;
+
+ return nested_apic_version1 == lvr && nested_apic_version2 == lvr;
+}
+
+static void npt_rw_l1mmio_prepare(struct svm_test *test)
+{
+
+ u64 *pte;
+
+ vmcb_ident(test->vmcb);
+ pte = npt_get_pte(0xfee00080);
+
+ *pte &= ~(1ULL << 1);
+}
+
+static void npt_rw_l1mmio_test(struct svm_test *test)
+{
+ volatile u32 *data = (volatile void*)(0xfee00080);
+
+ *data = *data;
+}
+
+static bool npt_rw_l1mmio_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte(0xfee00080);
+
+ *pte |= (1ULL << 1);
+
+ return (test->vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (test->vmcb->control.exit_info_1 == 0x100000007ULL);
+}
+
+#define TSC_ADJUST_VALUE (1ll << 32)
+#define TSC_OFFSET_VALUE (-1ll << 48)
+static bool ok;
+
+static void tsc_adjust_prepare(struct svm_test *test)
+{
+ default_prepare(test);
+ test->vmcb->control.tsc_offset = TSC_OFFSET_VALUE;
+
+ wrmsr(MSR_IA32_TSC_ADJUST, -TSC_ADJUST_VALUE);
+ int64_t adjust = rdmsr(MSR_IA32_TSC_ADJUST);
+ ok = adjust == -TSC_ADJUST_VALUE;
+}
+
+static void tsc_adjust_test(struct svm_test *test)
+{
+ int64_t adjust = rdmsr(MSR_IA32_TSC_ADJUST);
+ ok &= adjust == -TSC_ADJUST_VALUE;
+
+ uint64_t l1_tsc = rdtsc() - TSC_OFFSET_VALUE;
+ wrmsr(MSR_IA32_TSC, l1_tsc - TSC_ADJUST_VALUE);
+
+ adjust = rdmsr(MSR_IA32_TSC_ADJUST);
+ ok &= adjust <= -2 * TSC_ADJUST_VALUE;
+
+ uint64_t l1_tsc_end = rdtsc() - TSC_OFFSET_VALUE;
+ ok &= (l1_tsc_end + TSC_ADJUST_VALUE - l1_tsc) < TSC_ADJUST_VALUE;
+
+ uint64_t l1_tsc_msr = rdmsr(MSR_IA32_TSC) - TSC_OFFSET_VALUE;
+ ok &= (l1_tsc_msr + TSC_ADJUST_VALUE - l1_tsc) < TSC_ADJUST_VALUE;
+}
+
+static bool tsc_adjust_check(struct svm_test *test)
+{
+ int64_t adjust = rdmsr(MSR_IA32_TSC_ADJUST);
+
+ wrmsr(MSR_IA32_TSC_ADJUST, 0);
+ return ok && adjust <= -2 * TSC_ADJUST_VALUE;
+}
+
+static void latency_prepare(struct svm_test *test)
+{
+ default_prepare(test);
+ runs = LATENCY_RUNS;
+ latvmrun_min = latvmexit_min = -1ULL;
+ latvmrun_max = latvmexit_max = 0;
+ vmrun_sum = vmexit_sum = 0;
+ tsc_start = rdtsc();
+}
+
+static void latency_test(struct svm_test *test)
+{
+ u64 cycles;
+
+start:
+ tsc_end = rdtsc();
+
+ cycles = tsc_end - tsc_start;
+
+ if (cycles > latvmrun_max)
+ latvmrun_max = cycles;
+
+ if (cycles < latvmrun_min)
+ latvmrun_min = cycles;
+
+ vmrun_sum += cycles;
+
+ tsc_start = rdtsc();
+
+ asm volatile ("vmmcall" : : : "memory");
+ goto start;
+}
+
+static bool latency_finished(struct svm_test *test)
+{
+ u64 cycles;
+
+ tsc_end = rdtsc();
+
+ cycles = tsc_end - tsc_start;
+
+ if (cycles > latvmexit_max)
+ latvmexit_max = cycles;
+
+ if (cycles < latvmexit_min)
+ latvmexit_min = cycles;
+
+ vmexit_sum += cycles;
+
+ test->vmcb->save.rip += 3;
+
+ runs -= 1;
+
+ tsc_end = rdtsc();
+
+ return runs == 0;
+}
+
+static bool latency_check(struct svm_test *test)
+{
+ printf(" Latency VMRUN : max: %ld min: %ld avg: %ld\n", latvmrun_max,
+ latvmrun_min, vmrun_sum / LATENCY_RUNS);
+ printf(" Latency VMEXIT: max: %ld min: %ld avg: %ld\n", latvmexit_max,
+ latvmexit_min, vmexit_sum / LATENCY_RUNS);
+ return true;
+}
+
+static void lat_svm_insn_prepare(struct svm_test *test)
+{
+ default_prepare(test);
+ runs = LATENCY_RUNS;
+ latvmload_min = latvmsave_min = latstgi_min = latclgi_min = -1ULL;
+ latvmload_max = latvmsave_max = latstgi_max = latclgi_max = 0;
+ vmload_sum = vmsave_sum = stgi_sum = clgi_sum;
+}
+
+static bool lat_svm_insn_finished(struct svm_test *test)
+{
+ u64 vmcb_phys = virt_to_phys(test->vmcb);
+ u64 cycles;
+
+ for ( ; runs != 0; runs--) {
+ tsc_start = rdtsc();
+ asm volatile("vmload %0\n\t" : : "a"(vmcb_phys) : "memory");
+ cycles = rdtsc() - tsc_start;
+ if (cycles > latvmload_max)
+ latvmload_max = cycles;
+ if (cycles < latvmload_min)
+ latvmload_min = cycles;
+ vmload_sum += cycles;
+
+ tsc_start = rdtsc();
+ asm volatile("vmsave %0\n\t" : : "a"(vmcb_phys) : "memory");
+ cycles = rdtsc() - tsc_start;
+ if (cycles > latvmsave_max)
+ latvmsave_max = cycles;
+ if (cycles < latvmsave_min)
+ latvmsave_min = cycles;
+ vmsave_sum += cycles;
+
+ tsc_start = rdtsc();
+ asm volatile("stgi\n\t");
+ cycles = rdtsc() - tsc_start;
+ if (cycles > latstgi_max)
+ latstgi_max = cycles;
+ if (cycles < latstgi_min)
+ latstgi_min = cycles;
+ stgi_sum += cycles;
+
+ tsc_start = rdtsc();
+ asm volatile("clgi\n\t");
+ cycles = rdtsc() - tsc_start;
+ if (cycles > latclgi_max)
+ latclgi_max = cycles;
+ if (cycles < latclgi_min)
+ latclgi_min = cycles;
+ clgi_sum += cycles;
+ }
+
+ tsc_end = rdtsc();
+
+ return true;
+}
+
+static bool lat_svm_insn_check(struct svm_test *test)
+{
+ printf(" Latency VMLOAD: max: %ld min: %ld avg: %ld\n", latvmload_max,
+ latvmload_min, vmload_sum / LATENCY_RUNS);
+ printf(" Latency VMSAVE: max: %ld min: %ld avg: %ld\n", latvmsave_max,
+ latvmsave_min, vmsave_sum / LATENCY_RUNS);
+ printf(" Latency STGI: max: %ld min: %ld avg: %ld\n", latstgi_max,
+ latstgi_min, stgi_sum / LATENCY_RUNS);
+ printf(" Latency CLGI: max: %ld min: %ld avg: %ld\n", latclgi_max,
+ latclgi_min, clgi_sum / LATENCY_RUNS);
+ return true;
+}
+
+bool pending_event_ipi_fired;
+bool pending_event_guest_run;
+
+static void pending_event_ipi_isr(isr_regs_t *regs)
+{
+ pending_event_ipi_fired = true;
+ eoi();
+}
+
+static void pending_event_prepare(struct svm_test *test)
+{
+ int ipi_vector = 0xf1;
+
+ default_prepare(test);
+
+ pending_event_ipi_fired = false;
+
+ handle_irq(ipi_vector, pending_event_ipi_isr);
+
+ pending_event_guest_run = false;
+
+ test->vmcb->control.intercept |= (1ULL << INTERCEPT_INTR);
+ test->vmcb->control.int_ctl |= V_INTR_MASKING_MASK;
+
+ apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL |
+ APIC_DM_FIXED | ipi_vector, 0);
+
+ set_test_stage(test, 0);
+}
+
+static void pending_event_test(struct svm_test *test)
+{
+ pending_event_guest_run = true;
+}
+
+static bool pending_event_finished(struct svm_test *test)
+{
+ switch (get_test_stage(test)) {
+ case 0:
+ if (test->vmcb->control.exit_code != SVM_EXIT_INTR) {
+ report(false, "VMEXIT not due to pending interrupt. Exit reason 0x%x",
+ test->vmcb->control.exit_code);
+ return true;
+ }
+
+ test->vmcb->control.intercept &= ~(1ULL << INTERCEPT_INTR);
+ test->vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
+
+ if (pending_event_guest_run) {
+ report(false, "Guest ran before host received IPI\n");
+ return true;
+ }
+
+ irq_enable();
+ asm volatile ("nop");
+ irq_disable();
+
+ if (!pending_event_ipi_fired) {
+ report(false, "Pending interrupt not dispatched after IRQ enabled\n");
+ return true;
+ }
+ break;
+
+ case 1:
+ if (!pending_event_guest_run) {
+ report(false, "Guest did not resume when no interrupt\n");
+ return true;
+ }
+ break;
+ }
+
+ inc_test_stage(test);
+
+ return get_test_stage(test) == 2;
+}
+
+static bool pending_event_check(struct svm_test *test)
+{
+ return get_test_stage(test) == 2;
+}
+
+static void pending_event_prepare_vmask(struct svm_test *test)
+{
+ default_prepare(test);
+
+ pending_event_ipi_fired = false;
+
+ handle_irq(0xf1, pending_event_ipi_isr);
+
+ apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL |
+ APIC_DM_FIXED | 0xf1, 0);
+
+ set_test_stage(test, 0);
+}
+
+static void pending_event_prepare_gif_clear_vmask(struct svm_test *test)
+{
+ asm("cli");
+}
+
+static void pending_event_test_vmask(struct svm_test *test)
+{
+ if (pending_event_ipi_fired == true) {
+ set_test_stage(test, -1);
+ report(false, "Interrupt preceeded guest");
+ vmmcall();
+ }
+
+ irq_enable();
+ asm volatile ("nop");
+ irq_disable();
+
+ if (pending_event_ipi_fired != true) {
+ set_test_stage(test, -1);
+ report(false, "Interrupt not triggered by guest");
+ }
+
+ vmmcall();
+
+ irq_enable();
+ asm volatile ("nop");
+ irq_disable();
+}
+
+static bool pending_event_finished_vmask(struct svm_test *test)
+{
+ if ( test->vmcb->control.exit_code != SVM_EXIT_VMMCALL) {
+ report(false, "VM_EXIT return to host is not EXIT_VMMCALL exit reason 0x%x",
+ test->vmcb->control.exit_code);
+ return true;
+ }
+
+ switch (get_test_stage(test)) {
+ case 0:
+ test->vmcb->save.rip += 3;
+
+ pending_event_ipi_fired = false;
+
+ test->vmcb->control.int_ctl |= V_INTR_MASKING_MASK;
+
+ apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL |
+ APIC_DM_FIXED | 0xf1, 0);
+
+ break;
+
+ case 1:
+ if (pending_event_ipi_fired == true) {
+ report(false, "Interrupt triggered by guest");
+ return true;
+ }
+
+ irq_enable();
+ asm volatile ("nop");
+ irq_disable();
+
+ if (pending_event_ipi_fired != true) {
+ report(false, "Interrupt not triggered by host");
+ return true;
+ }
+
+ break;
+
+ default:
+ return true;
+ }
+
+ inc_test_stage(test);
+
+ return get_test_stage(test) == 2;
+}
+
+static bool pending_event_check_vmask(struct svm_test *test)
+{
+ return get_test_stage(test) == 2;
+}
+
+struct svm_test svm_tests[] = {
+ { "null", default_supported, default_prepare,
+ default_prepare_gif_clear, null_test,
+ default_finished, null_check },
+ { "vmrun", default_supported, default_prepare,
+ default_prepare_gif_clear, test_vmrun,
+ default_finished, check_vmrun },
+ { "ioio", default_supported, prepare_ioio,
+ default_prepare_gif_clear, test_ioio,
+ ioio_finished, check_ioio },
+ { "vmrun intercept check", default_supported, prepare_no_vmrun_int,
+ default_prepare_gif_clear, null_test, default_finished,
+ check_no_vmrun_int },
+ { "cr3 read intercept", default_supported,
+ prepare_cr3_intercept, default_prepare_gif_clear,
+ test_cr3_intercept, default_finished, check_cr3_intercept },
+ { "cr3 read nointercept", default_supported, default_prepare,
+ default_prepare_gif_clear, test_cr3_intercept, default_finished,
+ check_cr3_nointercept },
+ { "cr3 read intercept emulate", smp_supported,
+ prepare_cr3_intercept_bypass, default_prepare_gif_clear,
+ test_cr3_intercept_bypass, default_finished, check_cr3_intercept },
+ { "dr intercept check", default_supported, prepare_dr_intercept,
+ default_prepare_gif_clear, test_dr_intercept, dr_intercept_finished,
+ check_dr_intercept },
+ { "next_rip", next_rip_supported, prepare_next_rip,
+ default_prepare_gif_clear, test_next_rip,
+ default_finished, check_next_rip },
+ { "msr intercept check", default_supported, prepare_msr_intercept,
+ default_prepare_gif_clear, test_msr_intercept,
+ msr_intercept_finished, check_msr_intercept },
+ { "mode_switch", default_supported, prepare_mode_switch,
+ default_prepare_gif_clear, test_mode_switch,
+ mode_switch_finished, check_mode_switch },
+ { "asid_zero", default_supported, prepare_asid_zero,
+ default_prepare_gif_clear, test_asid_zero,
+ default_finished, check_asid_zero },
+ { "sel_cr0_bug", default_supported, sel_cr0_bug_prepare,
+ default_prepare_gif_clear, sel_cr0_bug_test,
+ sel_cr0_bug_finished, sel_cr0_bug_check },
+ { "npt_nx", npt_supported, npt_nx_prepare,
+ default_prepare_gif_clear, null_test,
+ default_finished, npt_nx_check },
+ { "npt_us", npt_supported, npt_us_prepare,
+ default_prepare_gif_clear, npt_us_test,
+ default_finished, npt_us_check },
+ { "npt_rsvd", npt_supported, npt_rsvd_prepare,
+ default_prepare_gif_clear, null_test,
+ default_finished, npt_rsvd_check },
+ { "npt_rw", npt_supported, npt_rw_prepare,
+ default_prepare_gif_clear, npt_rw_test,
+ default_finished, npt_rw_check },
+ { "npt_rsvd_pfwalk", npt_supported, npt_rsvd_pfwalk_prepare,
+ default_prepare_gif_clear, null_test,
+ default_finished, npt_rsvd_pfwalk_check },
+ { "npt_rw_pfwalk", npt_supported, npt_rw_pfwalk_prepare,
+ default_prepare_gif_clear, null_test,
+ default_finished, npt_rw_pfwalk_check },
+ { "npt_l1mmio", npt_supported, npt_l1mmio_prepare,
+ default_prepare_gif_clear, npt_l1mmio_test,
+ default_finished, npt_l1mmio_check },
+ { "npt_rw_l1mmio", npt_supported, npt_rw_l1mmio_prepare,
+ default_prepare_gif_clear, npt_rw_l1mmio_test,
+ default_finished, npt_rw_l1mmio_check },
+ { "tsc_adjust", default_supported, tsc_adjust_prepare,
+ default_prepare_gif_clear, tsc_adjust_test,
+ default_finished, tsc_adjust_check },
+ { "latency_run_exit", default_supported, latency_prepare,
+ default_prepare_gif_clear, latency_test,
+ latency_finished, latency_check },
+ { "latency_svm_insn", default_supported, lat_svm_insn_prepare,
+ default_prepare_gif_clear, null_test,
+ lat_svm_insn_finished, lat_svm_insn_check },
+ { "pending_event", default_supported, pending_event_prepare,
+ default_prepare_gif_clear,
+ pending_event_test, pending_event_finished, pending_event_check },
+ { "pending_event_vmask", default_supported, pending_event_prepare_vmask,
+ pending_event_prepare_gif_clear_vmask,
+ pending_event_test_vmask, pending_event_finished_vmask,
+ pending_event_check_vmask },
+ { NULL, NULL, NULL, NULL, NULL, NULL, NULL }
+};
--
1.8.3.1
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