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[src/trunk]: src/sys/arch/alpha Track the SSIR per-cpu, rather than globally.
details: https://anonhg.NetBSD.org/src/rev/96c4ba0de2ed
branches: trunk
changeset: 943537:96c4ba0de2ed
user: thorpej <thorpej%NetBSD.org@localhost>
date: Sat Sep 05 18:01:42 2020 +0000
description:
Track the SSIR per-cpu, rather than globally.
diffstat:
sys/arch/alpha/alpha/genassym.cf | 3 ++-
sys/arch/alpha/alpha/interrupt.c | 23 +++++++++--------------
sys/arch/alpha/alpha/locore.s | 24 ++++++++++++------------
sys/arch/alpha/include/cpu.h | 6 ++++--
sys/arch/alpha/include/intr.h | 18 +++++-------------
5 files changed, 32 insertions(+), 42 deletions(-)
diffs (208 lines):
diff -r 754c813fea02 -r 96c4ba0de2ed sys/arch/alpha/alpha/genassym.cf
--- a/sys/arch/alpha/alpha/genassym.cf Sat Sep 05 17:49:26 2020 +0000
+++ b/sys/arch/alpha/alpha/genassym.cf Sat Sep 05 18:01:42 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: genassym.cf,v 1.24 2020/09/05 16:29:07 thorpej Exp $
+# $NetBSD: genassym.cf,v 1.25 2020/09/05 18:01:42 thorpej Exp $
#
# Copyright (c) 1982, 1990, 1993
@@ -188,4 +188,5 @@
# CPU info
define CPU_INFO_CURLWP offsetof(struct cpu_info, ci_curlwp)
define CPU_INFO_IDLE_LWP offsetof(struct cpu_info, ci_data.cpu_idlelwp)
+define CPU_INFO_SSIR offsetof(struct cpu_info, ci_ssir)
define CPU_INFO_SIZEOF sizeof(struct cpu_info)
diff -r 754c813fea02 -r 96c4ba0de2ed sys/arch/alpha/alpha/interrupt.c
--- a/sys/arch/alpha/alpha/interrupt.c Sat Sep 05 17:49:26 2020 +0000
+++ b/sys/arch/alpha/alpha/interrupt.c Sat Sep 05 18:01:42 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: interrupt.c,v 1.83 2020/09/05 16:29:07 thorpej Exp $ */
+/* $NetBSD: interrupt.c,v 1.84 2020/09/05 18:01:42 thorpej Exp $ */
/*-
* Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
@@ -65,7 +65,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.83 2020/09/05 16:29:07 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.84 2020/09/05 18:01:42 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -450,24 +450,21 @@
return (rv);
}
-volatile unsigned long ssir;
-
/*
- * spl0:
+ * spllower:
*
- * Lower interrupt priority to IPL 0 -- must check for
- * software interrupts.
+ * Lower interrupt priority. May need to check for software
+ * interrupts.
*/
void
-spl0(void)
+spllower(int ipl)
{
- if (ssir) {
+ if (ipl == ALPHA_PSL_IPL_0 && curcpu()->ci_ssir) {
(void) alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT_LO);
softintr_dispatch();
}
-
- (void) alpha_pal_swpipl(ALPHA_PSL_IPL_0);
+ (void) alpha_pal_swpipl(ipl);
}
/*
@@ -491,9 +488,7 @@
void
softint_trigger(uintptr_t machdep)
{
-
- /* XXX Needs to be per-CPU */
- atomic_or_ulong(&ssir, 1 << (x))
+ atomic_or_ulong(&curcpu()->ci_ssir, 1 << (x))
}
#endif
diff -r 754c813fea02 -r 96c4ba0de2ed sys/arch/alpha/alpha/locore.s
--- a/sys/arch/alpha/alpha/locore.s Sat Sep 05 17:49:26 2020 +0000
+++ b/sys/arch/alpha/alpha/locore.s Sat Sep 05 18:01:42 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: locore.s,v 1.131 2020/09/05 16:29:07 thorpej Exp $ */
+/* $NetBSD: locore.s,v 1.132 2020/09/05 18:01:42 thorpej Exp $ */
/*-
* Copyright (c) 1999, 2000, 2019 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
#include <machine/asm.h>
-__KERNEL_RCSID(0, "$NetBSD: locore.s,v 1.131 2020/09/05 16:29:07 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: locore.s,v 1.132 2020/09/05 18:01:42 thorpej Exp $");
#include "assym.h"
@@ -239,8 +239,6 @@
* exception_return: return from trap, exception, or syscall
*/
-IMPORT(ssir, 8)
-
LEAF(exception_return, 1) /* XXX should be NESTED */
br pv, 1f
1: LDGP(pv)
@@ -249,8 +247,13 @@
and s1, ALPHA_PSL_IPL_MASK, t0 /* look at the saved IPL */
bne t0, 5f /* != 0: can't do AST or SIR */
- /* see if we can do an SIR */
-2: ldq t1, ssir /* SIR pending? */
+ /* GET_CURLWP clobbers v0, t0, t8...t11. */
+ GET_CURLWP
+ mov v0, s0 /* s0 = curlwp */
+
+ /* see if a soft interrupt is pending. */
+2: ldq t1, L_CPU(s0) /* t1 = curlwp->l_cpu */
+ ldq t1, CPU_INFO_SSIR(t1) /* soft int pending? */
bne t1, 6f /* yes */
/* no */
@@ -258,16 +261,13 @@
beq t0, 5f /* no: just return */
/* yes */
- /* GET_CURLWP clobbers v0, t0, t8...t11. */
-3: GET_CURLWP
-
/* check for AST */
- ldl t3, L_MD_ASTPENDING(v0) /* AST pending? */
+3: ldl t3, L_MD_ASTPENDING(s0) /* AST pending? */
bne t3, 7f /* yes */
/* no: headed back to user space */
/* Enable the FPU based on whether MDLWP_FPACTIVE is set. */
-4: ldq t2, L_MD_FLAGS(v0)
+4: ldq t2, L_MD_FLAGS(s0)
cmplt t2, zero, a0
call_pal PAL_OSF1_wrfen
@@ -294,7 +294,7 @@
br 2b
/* We've got an AST */
-7: stl zero, L_MD_ASTPENDING(v0) /* no AST pending */
+7: stl zero, L_MD_ASTPENDING(s0) /* no AST pending */
ldiq a0, ALPHA_PSL_IPL_0 /* drop IPL to zero */
call_pal PAL_OSF1_swpipl
diff -r 754c813fea02 -r 96c4ba0de2ed sys/arch/alpha/include/cpu.h
--- a/sys/arch/alpha/include/cpu.h Sat Sep 05 17:49:26 2020 +0000
+++ b/sys/arch/alpha/include/cpu.h Sat Sep 05 18:01:42 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.h,v 1.94 2020/09/04 15:50:09 thorpej Exp $ */
+/* $NetBSD: cpu.h,v 1.95 2020/09/05 18:01:42 thorpej Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
@@ -108,6 +108,7 @@
volatile int ci_mtx_oldspl; /* [MI] for spin mutex splx() */
u_long ci_intrdepth; /* interrupt trap depth */
+ volatile u_long ci_ssir; /* simulated software interrupt reg */
struct cpu_softc *ci_softc; /* pointer to our device */
struct pmap *ci_pmap; /* currently-activated pmap */
@@ -137,8 +138,9 @@
struct trapframe *ci_db_regs; /* registers for debuggers */
};
-/* Ensure cpu_info::ci_curlwp is within the signed 16-bit displacement. */
+/* Ensure some cpu_info fields are within the signed 16-bit displacement. */
__CTASSERT(offsetof(struct cpu_info, ci_curlwp) <= 0x7ff0);
+__CTASSERT(offsetof(struct cpu_info, ci_ssir) <= 0x7ff0);
#endif /* _KERNEL || _KMEMUSER */
diff -r 754c813fea02 -r 96c4ba0de2ed sys/arch/alpha/include/intr.h
--- a/sys/arch/alpha/include/intr.h Sat Sep 05 17:49:26 2020 +0000
+++ b/sys/arch/alpha/include/intr.h Sat Sep 05 18:01:42 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: intr.h,v 1.74 2020/09/05 16:29:08 thorpej Exp $ */
+/* $NetBSD: intr.h,v 1.75 2020/09/05 18:01:42 thorpej Exp $ */
/*-
* Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
@@ -132,20 +132,12 @@
#ifdef _KERNEL
-/* Simulated software interrupt register. */
-extern volatile unsigned long ssir;
-
/* IPL-lowering/restoring macros */
-void spl0(void);
+void spllower(int);
-static __inline void
-splx(int s)
-{
- if (s == ALPHA_PSL_IPL_0 && ssir != 0)
- spl0();
- else
- alpha_pal_swpipl(s);
-}
+#define splx(s) spllower(s)
+#define spl0() spllower(ALPHA_PSL_IPL_0)
+
/* IPL-raising functions/macros */
static __inline int
_splraise(int s)
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