diff --git a/sys/x86/include/apicvar.h b/sys/x86/include/apicvar.h --- a/sys/x86/include/apicvar.h +++ b/sys/x86/include/apicvar.h @@ -265,6 +265,7 @@ extern int x2apic_mode; extern int lapic_eoi_suppression; +extern int apic_ext_dest_id; #ifdef _SYS_SYSCTL_H_ SYSCTL_DECL(_hw_apic); diff --git a/sys/x86/x86/local_apic.c b/sys/x86/x86/local_apic.c --- a/sys/x86/x86/local_apic.c +++ b/sys/x86/x86/local_apic.c @@ -2086,6 +2086,17 @@ } SYSINIT(apic_setup_local, SI_SUB_CPU, SI_ORDER_SECOND, apic_setup_local, NULL); +/* Are we in a VM which supports the Extended Destination ID standard? */ +int apic_ext_dest_id = -1; +SYSCTL_INT(_machdep, OID_AUTO, apic_ext_dest_id, CTLFLAG_RDTUN, &apic_ext_dest_id, 0, + "Use APIC Extended Destination IDs"); + +/* Detect support for Extended Destination IDs. */ +static void +detect_extended_dest_id(void) +{ +} + /* * Setup the I/O APICs. */ @@ -2097,6 +2108,10 @@ if (best_enum == NULL) return; + /* Check hypervisor support for extended destination IDs. */ + if (apic_ext_dest_id == -1) + detect_extended_dest_id(); + /* * Local APIC must be registered before other PICs and pseudo PICs * for proper suspend/resume order.