[src/bouyer-xenpvh]: src/sys/arch/xen/xen Now that we return from hypervisor_...

[bouyer <bouyer%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/19d18eac95e0
branches:  bouyer-xenpvh
changeset: 1024957:19d18eac95e0
user:      bouyer <bouyer%NetBSD.org@localhost>
date:      Sun Apr 12 11:16:58 2020 +0000

description:
Now that we return from hypervisor_callback via Xdoreti, no need to emulate it
in evtchn_do_event() any more.

diffstat:

 sys/arch/xen/xen/evtchn.c |  35 ++---------------------------------
 1 files changed, 2 insertions(+), 33 deletions(-)

diffs (63 lines):

diff -r 1c83e2b73899 -r 19d18eac95e0 sys/arch/xen/xen/evtchn.c
--- a/sys/arch/xen/xen/evtchn.c Sat Apr 11 21:21:49 2020 +0000
+++ b/sys/arch/xen/xen/evtchn.c Sun Apr 12 11:16:58 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: evtchn.c,v 1.88.2.1 2020/04/10 14:38:19 bouyer Exp $   */
+/*     $NetBSD: evtchn.c,v 1.88.2.2 2020/04/12 11:16:58 bouyer Exp $   */
 
 /*
  * Copyright (c) 2006 Manuel Bouyer.
@@ -54,7 +54,7 @@
 
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: evtchn.c,v 1.88.2.1 2020/04/10 14:38:19 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: evtchn.c,v 1.88.2.2 2020/04/12 11:16:58 bouyer Exp $");
 
 #include "opt_xen.h"
 #include "isa.h"
@@ -316,8 +316,6 @@
        struct intrhand *ih;
        int     (*ih_fun)(void *, void *);
        uint32_t iplmask;
-       int i;
-       uint32_t iplbit;
 
        KASSERTMSG(evtch >= 0, "negative evtch: %d", evtch);
        KASSERTMSG(evtch < NR_EVENT_CHANNELS,
@@ -404,35 +402,6 @@
 #endif /* NPCI > 0 || NISA > 0 */              
 
 splx:
-       /*
-        * C version of spllower(). ASTs will be checked when
-        * hypevisor_callback() exits, so no need to check here.
-        */
-       iplmask = (XUNMASK(ci, ilevel) & ci->ci_xpending);
-       while (iplmask != 0) {
-               iplbit = 1 << (NIPL - 1);
-               i = (NIPL - 1);
-               while (iplmask != 0 && i > ilevel) {
-                       while (iplmask & iplbit) {
-                               ci->ci_xpending &= ~iplbit;
-                               ci->ci_ilevel = i;
-                               for (ih = ci->ci_xsources[i]->is_handlers;
-                                   ih != NULL; ih = ih->ih_next) {
-                                       KASSERT(ih->ih_cpu == ci);
-                                       x86_enable_intr();
-                                       ih_fun = (void *)ih->ih_fun;
-                                       ih_fun(ih->ih_arg, regs);
-                                       x86_disable_intr();
-                               }
-                               hypervisor_enable_ipl(i);
-                               /* more pending IPLs may have been registered */
-                               iplmask =
-                                   (XUNMASK(ci, ilevel) & ci->ci_xpending);
-                       }
-                       i--;
-                       iplbit >>= 1;
-               }
-       }
        ci->ci_ilevel = ilevel;
        return 0;
 }