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Diffstat (limited to 'kvm/test/x86/xsave.c')
-rw-r--r--kvm/test/x86/xsave.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/kvm/test/x86/xsave.c b/kvm/test/x86/xsave.c
deleted file mode 100644
index a22b44c7f..000000000
--- a/kvm/test/x86/xsave.c
+++ /dev/null
@@ -1,262 +0,0 @@
-#include "libcflat.h"
-#include "idt.h"
-
-#ifdef __x86_64__
-#define uint64_t unsigned long
-#else
-#define uint64_t unsigned long long
-#endif
-
-static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx)
-{
- /* ecx is often an input as well as an output. */
- asm volatile("cpuid"
- : "=a" (*eax),
- "=b" (*ebx),
- "=c" (*ecx),
- "=d" (*edx)
- : "0" (*eax), "2" (*ecx));
-}
-
-/*
- * Generic CPUID function
- * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
- * resulting in stale register contents being returned.
- */
-void cpuid(unsigned int op,
- unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx)
-{
- *eax = op;
- *ecx = 0;
- __cpuid(eax, ebx, ecx, edx);
-}
-
-/* Some CPUID calls want 'count' to be placed in ecx */
-void cpuid_count(unsigned int op, int count,
- unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx)
-{
- *eax = op;
- *ecx = count;
- __cpuid(eax, ebx, ecx, edx);
-}
-
-int xgetbv_checking(u32 index, u64 *result)
-{
- u32 eax, edx;
-
- asm volatile(ASM_TRY("1f")
- ".byte 0x0f,0x01,0xd0\n\t" /* xgetbv */
- "1:"
- : "=a" (eax), "=d" (edx)
- : "c" (index));
- *result = eax + ((u64)edx << 32);
- return exception_vector();
-}
-
-int xsetbv_checking(u32 index, u64 value)
-{
- u32 eax = value;
- u32 edx = value >> 32;
-
- asm volatile(ASM_TRY("1f")
- ".byte 0x0f,0x01,0xd1\n\t" /* xsetbv */
- "1:"
- : : "a" (eax), "d" (edx), "c" (index));
- return exception_vector();
-}
-
-unsigned long read_cr4(void)
-{
- unsigned long val;
- asm volatile("mov %%cr4,%0" : "=r" (val));
- return val;
-}
-
-int write_cr4_checking(unsigned long val)
-{
- asm volatile(ASM_TRY("1f")
- "mov %0,%%cr4\n\t"
- "1:": : "r" (val));
- return exception_vector();
-}
-
-#define CPUID_1_ECX_XSAVE (1 << 26)
-#define CPUID_1_ECX_OSXSAVE (1 << 27)
-int check_cpuid_1_ecx(unsigned int bit)
-{
- unsigned int eax, ebx, ecx, edx;
- cpuid(1, &eax, &ebx, &ecx, &edx);
- if (ecx & bit)
- return 1;
- return 0;
-}
-
-uint64_t get_supported_xcr0(void)
-{
- unsigned int eax, ebx, ecx, edx;
- cpuid_count(0xd, 0, &eax, &ebx, &ecx, &edx);
- printf("eax %x, ebx %x, ecx %x, edx %x\n",
- eax, ebx, ecx, edx);
- return eax + ((u64)edx << 32);
-}
-
-#define X86_CR4_OSXSAVE 0x00040000
-#define XCR_XFEATURE_ENABLED_MASK 0x00000000
-#define XCR_XFEATURE_ILLEGAL_MASK 0x00000010
-
-#define XSTATE_FP 0x1
-#define XSTATE_SSE 0x2
-#define XSTATE_YMM 0x4
-
-static int total_tests, fail_tests;
-
-void pass_if(int condition)
-{
- total_tests ++;
- if (condition)
- printf("Pass!\n");
- else {
- printf("Fail!\n");
- fail_tests ++;
- }
-}
-
-void test_xsave(void)
-{
- unsigned long cr4;
- uint64_t supported_xcr0;
- uint64_t test_bits;
- u64 xcr0;
- int r;
-
- printf("Legal instruction testing:\n");
- supported_xcr0 = get_supported_xcr0();
- printf("Supported XCR0 bits: 0x%x\n", supported_xcr0);
-
- printf("Check minimal XSAVE required bits: ");
- test_bits = XSTATE_FP | XSTATE_SSE;
- pass_if((supported_xcr0 & test_bits) == test_bits);
-
- printf("Set CR4 OSXSAVE: ");
- cr4 = read_cr4();
- r = write_cr4_checking(cr4 | X86_CR4_OSXSAVE);
- pass_if(r == 0);
-
- printf("Check CPUID.1.ECX.OSXSAVE - expect 1: ");
- pass_if(check_cpuid_1_ecx(CPUID_1_ECX_OSXSAVE));
-
- printf(" Legal tests\n");
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, XSTATE_FP): ");
- test_bits = XSTATE_FP;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == 0);
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, "
- "XSTATE_FP | XSTATE_SSE): ");
- test_bits = XSTATE_FP | XSTATE_SSE;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == 0);
- printf(" xgetbv(XCR_XFEATURE_ENABLED_MASK): ");
- r = xgetbv_checking(XCR_XFEATURE_ENABLED_MASK, &xcr0);
- pass_if(r == 0);
- printf(" Illegal tests\n");
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, 0) - expect #GP: ");
- test_bits = 0;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == GP_VECTOR);
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, XSTATE_SSE) "
- "- expect #GP: ");
- test_bits = XSTATE_SSE;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == GP_VECTOR);
- if (supported_xcr0 & XSTATE_YMM) {
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, "
- "XSTATE_YMM) - expect #GP: ");
- test_bits = XSTATE_YMM;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == GP_VECTOR);
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, "
- "XSTATE_FP | XSTATE_YMM) - expect #GP: ");
- test_bits = XSTATE_FP | XSTATE_YMM;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == GP_VECTOR);
- }
- printf(" xsetbv(XCR_XFEATURE_ILLEGAL_MASK, XSTATE_FP) "
- "- expect #GP: ");
- test_bits = XSTATE_SSE;
- r = xsetbv_checking(XCR_XFEATURE_ILLEGAL_MASK, test_bits);
- pass_if(r == GP_VECTOR);
- printf(" xgetbv(XCR_XFEATURE_ILLEGAL_MASK, XSTATE_FP) "
- "- expect #GP: ");
- test_bits = XSTATE_SSE;
- r = xsetbv_checking(XCR_XFEATURE_ILLEGAL_MASK, test_bits);
- pass_if(r == GP_VECTOR);
-
- printf("Unset CR4 OSXSAVE: ");
- cr4 &= ~X86_CR4_OSXSAVE;
- r = write_cr4_checking(cr4);
- pass_if(r == 0);
- printf("Check CPUID.1.ECX.OSXSAVE - expect 0: ");
- pass_if(check_cpuid_1_ecx(CPUID_1_ECX_OSXSAVE) == 0);
- printf(" Illegal tests:\n");
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, XSTATE_FP) - expect #UD: ");
- test_bits = XSTATE_FP;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == UD_VECTOR);
- printf(" xsetbv(XCR_XFEATURE_ENABLED_MASK, "
- "XSTATE_FP | XSTATE_SSE) - expect #UD: ");
- test_bits = XSTATE_FP | XSTATE_SSE;
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, test_bits);
- pass_if(r == UD_VECTOR);
- printf(" Illegal tests:\n");
- printf(" xgetbv(XCR_XFEATURE_ENABLED_MASK) - expect #UD: ");
- r = xgetbv_checking(XCR_XFEATURE_ENABLED_MASK, &xcr0);
- pass_if(r == UD_VECTOR);
-}
-
-void test_no_xsave(void)
-{
- unsigned long cr4;
- u64 xcr0;
- int r;
-
- printf("Check CPUID.1.ECX.OSXSAVE - expect 0: ");
- pass_if(check_cpuid_1_ecx(CPUID_1_ECX_OSXSAVE) == 0);
-
- printf("Illegal instruction testing:\n");
-
- printf("Set OSXSAVE in CR4 - expect #GP: ");
- cr4 = read_cr4();
- r = write_cr4_checking(cr4 | X86_CR4_OSXSAVE);
- pass_if(r == GP_VECTOR);
-
- printf("Execute xgetbv - expect #UD: ");
- r = xgetbv_checking(XCR_XFEATURE_ENABLED_MASK, &xcr0);
- pass_if(r == UD_VECTOR);
-
- printf("Execute xsetbv - expect #UD: ");
- r = xsetbv_checking(XCR_XFEATURE_ENABLED_MASK, 0x3);
- pass_if(r == UD_VECTOR);
-}
-
-int main(void)
-{
- setup_idt();
- if (check_cpuid_1_ecx(CPUID_1_ECX_XSAVE)) {
- printf("CPU has XSAVE feature\n");
- test_xsave();
- } else {
- printf("CPU don't has XSAVE feature\n");
- test_no_xsave();
- }
- printf("Total test: %d\n", total_tests);
- if (fail_tests == 0)
- printf("ALL PASS!\n");
- else {
- printf("Fail %d tests.\n", fail_tests);
- return 1;
- }
- return 0;
-}
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