amd64/i386: introduce APIC hooks for different APIC implementations.

This is needed for Xen PV(H) guests, since there's no hardware lapic
available on this kind of domains. This commit should not change
functionality.

Sponsored by: Citrix Systems R&D
Reviewed by: jhb
Approved by: gibbs

amd64/include/cpu.h:
amd64/amd64/mp_machdep.c:
i386/include/cpu.h:
i386/i386/mp_machdep.c:
 - Remove lapic_ipi_vectored hook from cpu_ops, since it's now
   implemented in the lapic hooks.

amd64/amd64/mp_machdep.c:
i386/i386/mp_machdep.c:
 - Use lapic_ipi_vectored directly, since it's now an inline function
   that will call the appropiate hook.

x86/x86/local_apic.c:
 - Prefix bare metal public lapic functions with native_ and mark them
   as static.
 - Define default implementation of apic_ops.

x86/include/apicvar.h:
 - Declare the apic_ops structure and create inline functions to
   access the hooks, so the change is transparent to existing users of
   the lapic_ functions.

x86/xen/hvm.c:
 - Switch to use the new apic_ops.

1 files changed, 3 insertions, 5 deletions

diff --git a/sys/amd64/amd64/mp_machdep.c b/sys/amd64/amd64/mp_machdep.c
index 6e59645..9b12449 100644
--- a/sys/amd64/amd64/mp_machdep.c
+++ b/sys/amd64/amd64/mp_machdep.c
@@ -125,9 +125,7 @@ static u_long *ipi_hardclock_counts[MAXCPU];
 #endif
 
 /* Default cpu_ops implementation. */
-struct cpu_ops cpu_ops = {
-	.ipi_vectored = lapic_ipi_vectored
-};
+struct cpu_ops cpu_ops;
 
 extern inthand_t IDTVEC(fast_syscall), IDTVEC(fast_syscall32);
 
@@ -1125,7 +1123,7 @@ ipi_send_cpu(int cpu, u_int ipi)
 		if (old_pending)
 			return;
 	}
-	cpu_ops.ipi_vectored(ipi, cpu_apic_ids[cpu]);
+	lapic_ipi_vectored(ipi, cpu_apic_ids[cpu]);
 }
 
 /*
@@ -1395,7 +1393,7 @@ ipi_all_but_self(u_int ipi)
 		CPU_OR_ATOMIC(&ipi_nmi_pending, &other_cpus);
 
 	CTR2(KTR_SMP, "%s: ipi: %x", __func__, ipi);
-	cpu_ops.ipi_vectored(ipi, APIC_IPI_DEST_OTHERS);
+	lapic_ipi_vectored(ipi, APIC_IPI_DEST_OTHERS);
 }
 
 int