[src/trunk]: src/sys/arch Just use struct cpu_info members for the Xen clock ...

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

details:   https://anonhg.NetBSD.org/src/rev/d8cbbe496948
branches:  trunk
changeset: 324353:d8cbbe496948
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sat Jun 30 14:21:19 2018 +0000

description:
Just use struct cpu_info members for the Xen clock state.

Silly to use percpu(9) for some things and struct cpu_info for
others.

diffstat:

 sys/arch/x86/include/cpu.h |   5 ++++-
 sys/arch/xen/xen/clock.c   |  37 +++++++++----------------------------
 2 files changed, 13 insertions(+), 29 deletions(-)

diffs (127 lines):

diff -r 3451a3f396cf -r d8cbbe496948 sys/arch/x86/include/cpu.h
--- a/sys/arch/x86/include/cpu.h        Sat Jun 30 13:44:50 2018 +0000
+++ b/sys/arch/x86/include/cpu.h        Sat Jun 30 14:21:19 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cpu.h,v 1.93 2018/06/29 21:53:12 riastradh Exp $       */
+/*     $NetBSD: cpu.h,v 1.94 2018/06/30 14:21:19 riastradh Exp $       */
 
 /*
  * Copyright (c) 1990 The Regents of the University of California.
@@ -253,6 +253,9 @@
         */
        uint64_t        ci_xen_systime_ns_skew;
 
+       /* Xen periodic timer interrupt handle.  */
+       struct intrhand *ci_xen_timer_intrhand;
+
        /* Event counters for various pathologies that might happen.  */
        struct evcnt    ci_xen_cpu_tsc_backwards_evcnt;
        struct evcnt    ci_xen_tsc_delta_negative_evcnt;
diff -r 3451a3f396cf -r d8cbbe496948 sys/arch/xen/xen/clock.c
--- a/sys/arch/xen/xen/clock.c  Sat Jun 30 13:44:50 2018 +0000
+++ b/sys/arch/xen/xen/clock.c  Sat Jun 30 14:21:19 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: clock.c,v 1.68 2018/06/29 21:53:12 riastradh Exp $     */
+/*     $NetBSD: clock.c,v 1.69 2018/06/30 14:21:19 riastradh Exp $     */
 
 /*-
  * Copyright (c) 2017, 2018 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
 #endif
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.68 2018/06/29 21:53:12 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.69 2018/06/30 14:21:19 riastradh Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -48,7 +48,6 @@
 #include <sys/intr.h>
 #include <sys/kernel.h>
 #include <sys/lwp.h>
-#include <sys/percpu.h>
 #include <sys/proc.h>
 #include <sys/sysctl.h>
 #include <sys/systm.h>
@@ -111,11 +110,6 @@
        .todr_settime = xen_rtc_set,
 };
 
-/*
- * xen timer interrupt handles -- per-CPU struct intrhand *
- */
-static struct percpu *xen_timer_ih_percpu __read_mostly;
-
 #ifdef DOM0OPS
 /*
  * xen timepush state:
@@ -724,22 +718,18 @@
 void
 xen_suspendclocks(struct cpu_info *ci)
 {
-       struct intrhand **ihp, *ih;
        int evtch;
 
        KASSERT(ci == curcpu());
        KASSERT(kpreempt_disabled());
+       KASSERT(ci->ci_xen_timer_intrhand != NULL);
 
        evtch = unbind_virq_from_evtch(VIRQ_TIMER);
        KASSERT(evtch != -1);
 
        hypervisor_mask_event(evtch);
-       ihp = percpu_getref(xen_timer_ih_percpu);
-       ih = *ihp;
-       KASSERT(ih != NULL);
-       intr_disestablish(ih);
-       *ihp = NULL;
-       percpu_putref(xen_timer_ih_percpu);
+       intr_disestablish(ci->ci_xen_timer_intrhand);
+       ci->ci_xen_timer_intrhand = NULL;
 
        aprint_verbose("Xen clock: removed event channel %d\n", evtch);
 
@@ -760,28 +750,23 @@
 xen_resumeclocks(struct cpu_info *ci)
 {
        char intr_xname[INTRDEVNAMEBUF];
-       struct intrhand **ihp, *ih;
        int evtch;
 
        KASSERT(ci == curcpu());
        KASSERT(kpreempt_disabled());
+       KASSERT(ci->ci_xen_timer_intrhand == NULL);
 
        evtch = bind_virq_to_evtch(VIRQ_TIMER);
        KASSERT(evtch != -1);
 
        snprintf(intr_xname, sizeof(intr_xname), "%s clock",
            device_xname(ci->ci_dev));
-
-       ihp = percpu_getref(xen_timer_ih_percpu);
-       KASSERT(*ihp == NULL);
        /* XXX sketchy function pointer cast -- fix the API, please */
-       ih = intr_establish_xname(0, &xen_pic, evtch, IST_LEVEL,
-           IPL_CLOCK, (int (*)(void *))xen_timer_handler, ci, true,
+       ci->ci_xen_timer_intrhand = intr_establish_xname(0, &xen_pic, evtch,
+           IST_LEVEL, IPL_CLOCK, (int (*)(void *))xen_timer_handler, ci, true,
            intr_xname);
-       if (ih == NULL)
+       if (ci->ci_xen_timer_intrhand == NULL)
                panic("failed to establish timer interrupt handler");
-       *ihp = ih;
-       percpu_putref(xen_timer_ih_percpu);
 
        hypervisor_enable_event(evtch);
 
@@ -867,10 +852,6 @@
 
        /* If this is the primary CPU, do global initialization first.  */
        if (ci == &cpu_info_primary) {
-               /* Allocate the per-CPU interrupt handle array.  */
-               xen_timer_ih_percpu = percpu_alloc(sizeof(struct intrhand *));
-               KASSERT(xen_timer_ih_percpu != NULL);
-
                /* Initialize the systemwide Xen timecounter.  */
                tc_init(&xen_timecounter);