Remove support for Xen PV domU kernels. Support for HVM domU kernels

remains.  Xen is planning to phase out support for PV upstream since it
is harder to maintain and has more overhead.  Modern x86 CPUs include
virtualization extensions that support HVM guests instead of PV guests.
In addition, the PV code was i386 only and not as well maintained recently
as the HVM code.
- Remove the i386-only NATIVE option that was used to disable certain
  components for PV kernels.  These components are now standard as they
  are on amd64.
- Remove !XENHVM bits from PV drivers.
- Remove various shims required for XEN (e.g. PT_UPDATES_FLUSH, LOAD_CR3,
  etc.)
- Remove duplicate copy of <xen/features.h>.
- Remove unused, i386-only xenstored.h.

Differential Revision:	https://reviews.freebsd.org/D2362
Reviewed by:	royger
Tested by:	royger (i386/amd64 HVM domU and amd64 PVH dom0)
Relnotes:	yes

1 files changed, 0 insertions, 7 deletions

diff --git a/sys/i386/include/smp.h b/sys/i386/include/smp.h
index 71f3121..71c830e 100644
--- a/sys/i386/include/smp.h
+++ b/sys/i386/include/smp.h
@@ -90,9 +90,7 @@ inthand_t
 void	assign_cpu_ids(void);
 void	cpu_add(u_int apic_id, char boot_cpu);
 void	cpustop_handler(void);
-#ifndef XEN
 void	cpususpend_handler(void);
-#endif
 void	init_secondary_tail(void);
 void	invltlb_handler(void);
 void	invlpg_handler(void);
@@ -101,9 +99,7 @@ void	invlcache_handler(void);
 void	init_secondary(void);
 void	ipi_startup(int apic_id, int vector);
 void	ipi_all_but_self(u_int ipi);
-#ifndef XEN
 void 	ipi_bitmap_handler(struct trapframe frame);
-#endif
 void	ipi_cpu(int cpu, u_int ipi);
 int	ipi_nmi_handler(void);
 void	ipi_selected(cpuset_t cpus, u_int ipi);
@@ -121,9 +117,6 @@ void	mem_range_AP_init(void);
 void	topo_probe(void);
 void	ipi_send_cpu(int cpu, u_int ipi);
 
-#ifdef XEN
-void ipi_to_irq_init(void);
-#endif
 #endif /* !LOCORE */
 #endif /* SMP */