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[src/trunk]: src/sys/arch/arm/cortex Improve priority handling for cases wher...
details: https://anonhg.NetBSD.org/src/rev/60b720cbd7f9
branches: trunk
changeset: 452057:60b720cbd7f9
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Mon Jun 17 10:15:08 2019 +0000
description:
Improve priority handling for cases where access is secure, from OpenBSD.
diffstat:
sys/arch/arm/cortex/gicv3.c | 56 ++++++++++++++++++++++++++++++++------------
sys/arch/arm/cortex/gicv3.h | 8 +++++-
2 files changed, 47 insertions(+), 17 deletions(-)
diffs (159 lines):
diff -r 3f1de3614526 -r 60b720cbd7f9 sys/arch/arm/cortex/gicv3.c
--- a/sys/arch/arm/cortex/gicv3.c Mon Jun 17 08:09:57 2019 +0000
+++ b/sys/arch/arm/cortex/gicv3.c Mon Jun 17 10:15:08 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: gicv3.c,v 1.17 2019/06/12 11:35:17 mrg Exp $ */
+/* $NetBSD: gicv3.c,v 1.18 2019/06/17 10:15:08 jmcneill Exp $ */
/*-
* Copyright (c) 2018 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -31,7 +31,7 @@
#define _INTR_PRIVATE
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: gicv3.c,v 1.17 2019/06/12 11:35:17 mrg Exp $");
+__KERNEL_RCSID(0, "$NetBSD: gicv3.c,v 1.18 2019/06/17 10:15:08 jmcneill Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
@@ -52,7 +52,9 @@
#define LPITOSOFTC(lpi) \
((void *)((uintptr_t)(lpi) - offsetof(struct gicv3_softc, sc_lpi)))
-#define IPL_TO_PRIORITY(ipl) ((IPL_HIGH - (ipl)) << 4)
+#define IPL_TO_PRIORITY(sc, ipl) (((0xff - (ipl)) << (sc)->sc_priority_shift) & 0xff)
+#define IPL_TO_PMR(sc, ipl) (((0xff - (ipl)) << (sc)->sc_pmr_shift) & 0xff)
+#define IPL_TO_LPIPRIO(sc, ipl) (((0xff - (ipl)) << 4) & 0xff)
static struct gicv3_softc *gicv3_softc;
@@ -155,7 +157,7 @@
uint64_t irouter;
u_int n;
- const u_int ipriority_val = 0x80 | IPL_TO_PRIORITY(is->is_ipl);
+ const u_int ipriority_val = IPL_TO_PRIORITY(sc, is->is_ipl);
const u_int ipriority_shift = (is->is_irq & 0x3) * 8;
const u_int icfg_shift = (is->is_irq & 0xf) * 2;
@@ -206,7 +208,9 @@
static void
gicv3_set_priority(struct pic_softc *pic, int ipl)
{
- icc_pmr_write(IPL_TO_PRIORITY(ipl) << 1);
+ struct gicv3_softc * const sc = PICTOSOFTC(pic);
+
+ icc_pmr_write(IPL_TO_PMR(sc, ipl));
}
static void
@@ -246,6 +250,8 @@
/* Enable Affinity routing and G1NS interrupts */
gicd_ctrl = GICD_CTRL_EnableGrp1A | GICD_CTRL_Enable | GICD_CTRL_ARE_NS;
+ if (ISSET(sc->sc_flags, GICV3_F_SECURE))
+ gicd_ctrl = (gicd_ctrl & ~GICD_CTRL_EnableGrp1A) << 1;
gicd_write_4(sc, GICD_CTRL, gicd_ctrl);
}
@@ -271,7 +277,7 @@
if (is == NULL)
priority |= 0xff << byte_shift;
else {
- const u_int ipriority_val = 0x80 | IPL_TO_PRIORITY(is->is_ipl);
+ const u_int ipriority_val = IPL_TO_PRIORITY(sc, is->is_ipl);
priority |= ipriority_val << byte_shift;
}
}
@@ -303,19 +309,11 @@
{
u_int aff3, aff2, aff1, aff0;
-#ifdef __aarch64__
- const register_t mpidr = reg_mpidr_el1_read();
+ const register_t mpidr = cpu_mpidr_aff_read();
aff0 = __SHIFTOUT(mpidr, MPIDR_AFF0);
aff1 = __SHIFTOUT(mpidr, MPIDR_AFF1);
aff2 = __SHIFTOUT(mpidr, MPIDR_AFF2);
aff3 = __SHIFTOUT(mpidr, MPIDR_AFF3);
-#else
- const register_t mpidr = armreg_mpidr_read();
- aff0 = __SHIFTOUT(mpidr, MPIDR_AFF0);
- aff1 = __SHIFTOUT(mpidr, MPIDR_AFF1);
- aff2 = __SHIFTOUT(mpidr, MPIDR_AFF2);
- aff3 = 0;
-#endif
return __SHIFTIN(aff0, GICR_TYPER_Affinity_Value_Aff0) |
__SHIFTIN(aff1, GICR_TYPER_Affinity_Value_Aff1) |
@@ -545,7 +543,7 @@
{
struct gicv3_softc * const sc = LPITOSOFTC(pic);
- sc->sc_lpiconf.base[is->is_irq] = 0x80 | IPL_TO_PRIORITY(is->is_ipl) | GIC_LPICONF_Res1;
+ sc->sc_lpiconf.base[is->is_irq] = IPL_TO_LPIPRIO(sc, is->is_ipl) | GIC_LPICONF_Res1;
bus_dmamap_sync(sc->sc_dmat, sc->sc_lpiconf.map, is->is_irq, 1, BUS_DMASYNC_PREWRITE);
}
@@ -719,6 +717,7 @@
gicv3_init(struct gicv3_softc *sc)
{
const uint32_t gicd_typer = gicd_read_4(sc, GICD_TYPER);
+ const uint32_t gicd_ctrl = gicd_read_4(sc, GICD_CTRL);
int n;
KASSERT(CPU_IS_PRIMARY(curcpu()));
@@ -728,6 +727,31 @@
for (n = 0; n < MAXCPUS; n++)
sc->sc_irouter[n] = UINT64_MAX;
+ sc->sc_priority_shift = 4;
+ const uint32_t oldnsacr = gicd_read_4(sc, GICD_NSACRn(2));
+ gicd_write_4(sc, GICD_NSACRn(2), oldnsacr ^ 0xffffffff);
+ if (gicd_read_4(sc, GICD_NSACRn(2)) != oldnsacr) {
+ gicd_write_4(sc, GICD_NSACRn(2), oldnsacr);
+ sc->sc_priority_shift--;
+ SET(sc->sc_flags, GICV3_F_SECURE);
+ }
+ aprint_verbose_dev(sc->sc_dev, "access is %ssecure\n",
+ ISSET(sc->sc_flags, GICV3_F_SECURE) ? "" : "in");
+
+ sc->sc_pmr_shift = 4;
+ if ((gicd_ctrl & GICD_CTRL_DS) == 0) {
+ const uint32_t icc_ctlr = icc_ctlr_read();
+ const u_int nbits = __SHIFTOUT(icc_ctlr, ICC_CTLR_EL1_PRIbits) + 1;
+ const u_int oldpmr = icc_pmr_read();
+ icc_pmr_write(0xff);
+ const u_int pmr = icc_pmr_read();
+ icc_pmr_write(oldpmr);
+ if (nbits == 8 - (ffs(pmr) - 1))
+ sc->sc_pmr_shift--;
+ }
+ aprint_verbose_dev(sc->sc_dev, "priority shift %d, pmr shift %d\n",
+ sc->sc_priority_shift, sc->sc_pmr_shift);
+
sc->sc_pic.pic_ops = &gicv3_picops;
sc->sc_pic.pic_maxsources = GICD_TYPER_LINES(gicd_typer);
snprintf(sc->sc_pic.pic_name, sizeof(sc->sc_pic.pic_name), "gicv3");
diff -r 3f1de3614526 -r 60b720cbd7f9 sys/arch/arm/cortex/gicv3.h
--- a/sys/arch/arm/cortex/gicv3.h Mon Jun 17 08:09:57 2019 +0000
+++ b/sys/arch/arm/cortex/gicv3.h Mon Jun 17 10:15:08 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: gicv3.h,v 1.4 2018/11/10 11:46:31 jmcneill Exp $ */
+/* $NetBSD: gicv3.h,v 1.5 2019/06/17 10:15:08 jmcneill Exp $ */
/*-
* Copyright (c) 2018 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -60,6 +60,12 @@
bus_space_handle_t *sc_bsh_r; /* GICR */
u_int sc_bsh_r_count;
+ u_int sc_flags;
+#define GICV3_F_SECURE 0x01
+
+ u_int sc_priority_shift;
+ u_int sc_pmr_shift;
+
uint32_t sc_enabled_sgippi;
uint64_t sc_irouter[MAXCPUS];
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