diff options
| -rw-r--r-- | target/i386/cpu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 9fdfec9d8b..94cc4a8700 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5287,7 +5287,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, /* QEMU gives out its own APIC IDs, never pass down bits 31..26. */ *eax &= ~0xFC000000; if ((*eax & 31) && cs->nr_cores > 1) { - *eax |= (cs->nr_cores - 1) << 26; + *eax |= (pow2ceil(cs->nr_cores) - 1) << 26; } } else if (cpu->vendor_cpuid_only && IS_AMD_CPU(env)) { *eax = *ebx = *ecx = *edx = 0; |