diff options
| author | Colin Percival <cperciva@FreeBSD.org> | 2026-02-22 04:09:00 +0000 |
|---|---|---|
| committer | Colin Percival <cperciva@FreeBSD.org> | 2026-03-28 05:54:52 +0000 |
| commit | 8dd9a0d52175fbc5dafed851fb95a289a94fb6cd (patch) | |
| tree | 512ec05139aec335d004e2e10f6db4e9844aaddb | |
| parent | 49b6254b3e09ee741f456617111ecb18803459fb (diff) | |
Bhyve: Detect Extended Destination ID support
Bhyve advertises support for the Extended Destination ID standard via
bit 0 (aka CPUID_BHYVE_FEAT_EXT_DEST_ID) of the value returned in the
EAX register when Bhyve features are queried via CPUID.
MFC after: 3 weeks
Sponsored by: Amazon
Differential Revision: https://reviews.freebsd.org/D55431
| -rw-r--r-- | sys/x86/x86/local_apic.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sys/x86/x86/local_apic.c b/sys/x86/x86/local_apic.c index accdf853a174..20f095a13574 100644 --- a/sys/x86/x86/local_apic.c +++ b/sys/x86/x86/local_apic.c @@ -74,6 +74,7 @@ #include <x86/init.h> #include <x86/kvm.h> #include <contrib/xen/arch-x86/cpuid.h> +#include <x86/bhyve.h> #ifdef DDB #include <sys/interrupt.h> @@ -2111,6 +2112,13 @@ detect_extended_dest_id(void) if (regs[0] & KVM_FEATURE_MSI_EXT_DEST_ID) apic_ext_dest_id = 1; break; + case VM_GUEST_BHYVE: + if (hv_high < CPUID_BHYVE_FEATURES) + break; + cpuid_count(CPUID_BHYVE_FEATURES, 0, regs); + if (regs[0] & CPUID_BHYVE_FEAT_EXT_DEST_ID) + apic_ext_dest_id = 1; + break; } } |