diff options
| -rw-r--r-- | src/arch/x86/core/cpuid.c | 4 | ||||
| -rw-r--r-- | src/arch/x86/include/ipxe/cpuid.h | 3 |
2 files changed, 5 insertions, 2 deletions
diff --git a/src/arch/x86/core/cpuid.c b/src/arch/x86/core/cpuid.c index 1a7c93e83..b7d9fb6c6 100644 --- a/src/arch/x86/core/cpuid.c +++ b/src/arch/x86/core/cpuid.c @@ -84,8 +84,8 @@ int cpuid_supported ( uint32_t function ) { return rc; /* Find highest supported function number within this family */ - cpuid ( ( function & CPUID_EXTENDED ), 0, &max_function, &discard_b, - &discard_c, &discard_d ); + cpuid ( ( function & ( CPUID_EXTENDED | CPUID_HYPERVISOR ) ), 0, + &max_function, &discard_b, &discard_c, &discard_d ); /* Fail if maximum function number is meaningless (e.g. if we * are attempting to call an extended function on a CPU which diff --git a/src/arch/x86/include/ipxe/cpuid.h b/src/arch/x86/include/ipxe/cpuid.h index 90d1bf01d..99b91c5c8 100644 --- a/src/arch/x86/include/ipxe/cpuid.h +++ b/src/arch/x86/include/ipxe/cpuid.h @@ -33,6 +33,9 @@ struct x86_features { /** CPUID extended function */ #define CPUID_EXTENDED 0x80000000UL +/** CPUID hypervisor function */ +#define CPUID_HYPERVISOR 0x40000000UL + /** Get vendor ID and largest standard function */ #define CPUID_VENDOR_ID 0x00000000UL |