On 11/16/2009 01:17 PM, Dietmar Maurer wrote:
38f0: 0f 85 82 01 00 00 jne 3a78<svm_get_msr+0x2b8> 38f6: 48 8b 87 e0 27 00 00 mov 0x27e0(%rdi),%rax 38fd: 48 8b 48 50 mov 0x50(%rax),%rcx 3901: 0f 31 rdtsc 3903: 48 01 c8 add %rcx,%rax # this is svm_get_msr+0x146 3906: 48 89 02 mov %rax,(%rdx)
Looks like a miscompile of native_read_tsc(), it needs to use %edx:%eax, not assume the result is in %rax.
Jan, looks like the culprit is static inline unsigned long long kvm_native_read_tsc(void) { unsigned long long val; asm volatile("rdtsc" : "=A" (val)); return val; } "=A" only works correctly on i386, need to use "=a" "=d" for portability. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html