From 61ccede8cf6cc1442ce531fe28c25fd000263fb5 Mon Sep 17 00:00:00 2001
From: Elliott Mitchell <ehem+freebsd@m5p.com>
Date: Mon, 7 Mar 2022 15:23:23 -0800
Subject: [PATCH] xen: purge no longer used hypervisor functions

HYPERVISOR_poll(), HYPERVISOR_block(), and HYPERVISOR_crash() appear no
longer used.  Further get_system_time() appears to have disappeared at
some point in the past, so HYPERVISOR_poll() was broken anyway.

No functional change intended.

Reviewed by: royger
---
 sys/xen/hypervisor.h | 44 --------------------------------------------
 1 file changed, 44 deletions(-)

diff --git a/sys/xen/hypervisor.h b/sys/xen/hypervisor.h
index c42956d253c2..4e79423c3a8e 100644
--- a/sys/xen/hypervisor.h
+++ b/sys/xen/hypervisor.h
@@ -23,8 +23,6 @@
 #include <contrib/xen/hvm/dm_op.h>
 #include <machine/xen/hypercall.h>
 
-extern uint64_t get_system_time(int ticks);
-
 static inline int 
 HYPERVISOR_console_write(const char *str, int count)
 {
@@ -43,19 +41,6 @@ HYPERVISOR_yield(void)
         return (rc);
 }
 
-static inline int
-HYPERVISOR_block(
-        void)
-{
-        int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
-
-#if CONFIG_XEN_COMPAT <= 0x030002
-	if (rc == -ENOXENSYS)
-		rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
-#endif
-        return (rc);
-}
-
 static inline void 
 HYPERVISOR_shutdown(unsigned int reason)
 {
@@ -69,33 +54,4 @@ HYPERVISOR_shutdown(unsigned int reason)
 #endif
 }
 
-static inline void
-HYPERVISOR_crash(void) 
-{
-        HYPERVISOR_shutdown(SHUTDOWN_crash); 
-	/* NEVER REACHED */
-        for (;;) ; /* eliminate noreturn error */ 
-}
-
-/* Transfer control to hypervisor until an event is detected on one */
-/* of the specified ports or the specified number of ticks elapse */
-static inline int
-HYPERVISOR_poll(
-	evtchn_port_t *ports, unsigned int nr_ports, int ticks)
-{
-	int rc;
-	struct sched_poll sched_poll = {
-		.nr_ports = nr_ports,
-		.timeout = get_system_time(ticks)
-	};
-	set_xen_guest_handle(sched_poll.ports, ports);
-
-	rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
-#if CONFIG_XEN_COMPAT <= 0x030002
-	if (rc == -ENOXENSYS)
-		rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
-#endif	
-	return (rc);
-}
-
 #endif /* __XEN_HYPERVISOR_H__ */