- asm volatile (
- "ftrace_test_jmp:"
- "jmp ftrace_test_p6nop\n"
- "nop\n"
- "nop\n"
- "nop\n" /* 2 byte jmp + 3 bytes */
- "ftrace_test_p6nop:"
- P6_NOP5
- "jmp 1f\n"
- "ftrace_test_nop5:"
- ".byte 0x66,0x66,0x66,0x66,0x90\n"
- "1:"
- ".section .fixup, \"ax\"\n"
- "2: movl $1, %0\n"
- " jmp ftrace_test_nop5\n"
- "3: movl $2, %0\n"
- " jmp 1b\n"
- ".previous\n"
- _ASM_EXTABLE(ftrace_test_p6nop, 2b)
- _ASM_EXTABLE(ftrace_test_nop5, 3b)
- : "=r"(faulted) : "0" (faulted));
-
- switch (faulted) {
- case 0:
- pr_info("converting mcount calls to 0f 1f 44 00 00\n");
- memcpy(ideal_nop5, ftrace_test_p6nop, IDEAL_NOP_SIZE_5);
- break;
- case 1:
- pr_info("converting mcount calls to 66 66 66 66 90\n");
- memcpy(ideal_nop5, ftrace_test_nop5, IDEAL_NOP_SIZE_5);
- break;
- case 2:
- pr_info("converting mcount calls to jmp . + 5\n");
- memcpy(ideal_nop5, ftrace_test_jmp, IDEAL_NOP_SIZE_5);
- break;
- }
-
+#ifdef CONFIG_X86_64
+ /* Don't use these on 32 bits due to broken virtualizers */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ memcpy(ideal_nop5, p6_nops[5], 5);
+#endif