From: David Gibson <david@gibson.dropbear.id.au>
To: qemu-ppc@nongnu.org, clg@kaod.org, qemu-devel@nongnu.org
Cc: "Jason Wang" <jasowang@redhat.com>,
"Riku Voipio" <riku.voipio@iki.fi>,
"Laurent Vivier" <laurent@vivier.eu>,
groug@kaod.org, "Paolo Bonzini" <pbonzini@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
philmd@redhat.com, "David Gibson" <david@gibson.dropbear.id.au>
Subject: [PATCH v3 16/34] spapr, xics, xive: Better use of assert()s on irq claim/free paths
Date: Wed, 2 Oct 2019 12:51:50 +1000 [thread overview]
Message-ID: <20191002025208.3487-17-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20191002025208.3487-1-david@gibson.dropbear.id.au>
The irq claim and free paths for both XICS and XIVE check for some
validity conditions. Some of these represent genuine runtime failures,
however others - particularly checking that the basic irq number is in a
sane range - could only fail in the case of bugs in the callin code.
Therefore use assert()s instead of runtime failures for those.
In addition the non backend-specific part of the claim/free paths should
only be used for PAPR external irqs, that is in the range SPAPR_XIRQ_BASE
to the maximum irq number. Put assert()s for that into the top level
dispatchers as well.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
---
hw/intc/spapr_xive.c | 8 ++------
hw/ppc/spapr_irq.c | 18 ++++++++++--------
2 files changed, 12 insertions(+), 14 deletions(-)
diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c
index c1c97192a7..47b5ec0b56 100644
--- a/hw/intc/spapr_xive.c
+++ b/hw/intc/spapr_xive.c
@@ -532,9 +532,7 @@ bool spapr_xive_irq_claim(SpaprXive *xive, uint32_t lisn, bool lsi)
{
XiveSource *xsrc = &xive->source;
- if (lisn >= xive->nr_irqs) {
- return false;
- }
+ assert(lisn < xive->nr_irqs);
/*
* Set default values when allocating an IRQ number
@@ -559,9 +557,7 @@ bool spapr_xive_irq_claim(SpaprXive *xive, uint32_t lisn, bool lsi)
bool spapr_xive_irq_free(SpaprXive *xive, uint32_t lisn)
{
- if (lisn >= xive->nr_irqs) {
- return false;
- }
+ assert(lisn < xive->nr_irqs);
xive->eat[lisn].w &= cpu_to_be64(~EAS_VALID);
return true;
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index d2ac35bbe1..025c802e7b 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -118,11 +118,7 @@ static int spapr_irq_claim_xics(SpaprMachineState *spapr, int irq, bool lsi,
ICSState *ics = spapr->ics;
assert(ics);
-
- if (!ics_valid_irq(ics, irq)) {
- error_setg(errp, "IRQ %d is invalid", irq);
- return -1;
- }
+ assert(ics_valid_irq(ics, irq));
if (!ics_irq_free(ics, irq - ics->offset)) {
error_setg(errp, "IRQ %d is not free", irq);
@@ -138,9 +134,9 @@ static void spapr_irq_free_xics(SpaprMachineState *spapr, int irq)
ICSState *ics = spapr->ics;
uint32_t srcno = irq - ics->offset;
- if (ics_valid_irq(ics, irq)) {
- memset(&ics->irqs[srcno], 0, sizeof(ICSIRQState));
- }
+ assert(ics_valid_irq(ics, irq));
+
+ memset(&ics->irqs[srcno], 0, sizeof(ICSIRQState));
}
static void spapr_irq_print_info_xics(SpaprMachineState *spapr, Monitor *mon)
@@ -623,6 +619,9 @@ void spapr_irq_init(SpaprMachineState *spapr, Error **errp)
int spapr_irq_claim(SpaprMachineState *spapr, int irq, bool lsi, Error **errp)
{
+ assert(irq >= SPAPR_XIRQ_BASE);
+ assert(irq < (spapr->irq->nr_xirqs + SPAPR_XIRQ_BASE));
+
return spapr->irq->claim(spapr, irq, lsi, errp);
}
@@ -630,6 +629,9 @@ void spapr_irq_free(SpaprMachineState *spapr, int irq, int num)
{
int i;
+ assert(irq >= SPAPR_XIRQ_BASE);
+ assert((irq + num) <= (spapr->irq->nr_xirqs + SPAPR_XIRQ_BASE));
+
for (i = irq; i < (irq + num); i++) {
spapr->irq->free(spapr, i);
}
--
2.21.0
next prev parent reply other threads:[~2019-10-02 3:09 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-02 2:51 [PATCH v3 00/34] spapr: IRQ subsystem cleanup David Gibson
2019-10-02 2:51 ` [PATCH v3 01/34] xics: Minor fixes for XICSFabric interface David Gibson
2019-10-02 5:51 ` Cédric Le Goater
2019-10-02 5:55 ` Cédric Le Goater
2019-10-02 5:55 ` David Gibson
2019-10-02 6:56 ` Greg Kurz
2019-10-02 2:51 ` [PATCH v3 02/34] xics: Eliminate 'reject', 'resend' and 'eoi' class hooks David Gibson
2019-10-02 2:51 ` [PATCH v3 03/34] xics: Rename misleading ics_simple_*() functions David Gibson
2019-10-02 2:51 ` [PATCH v3 04/34] xics: Eliminate reset hook David Gibson
2019-10-02 2:51 ` [PATCH v3 05/34] xics: Merge TYPE_ICS_BASE and TYPE_ICS_SIMPLE classes David Gibson
2019-10-02 2:51 ` [PATCH v3 06/34] xics: Create sPAPR specific ICS subtype David Gibson
2019-10-02 2:51 ` [PATCH v3 07/34] spapr: Fold spapr_phb_lsi_qirq() into its single caller David Gibson
2019-10-02 2:51 ` [PATCH v3 08/34] spapr: Replace spapr_vio_qirq() helper with spapr_vio_irq_pulse() helper David Gibson
2019-10-02 2:51 ` [PATCH v3 09/34] spapr: Clarify and fix handling of nr_irqs David Gibson
2019-10-02 5:57 ` Cédric Le Goater
2019-10-02 2:51 ` [PATCH v3 10/34] spapr: Eliminate nr_irqs parameter to SpaprIrq::init David Gibson
2019-10-02 2:51 ` [PATCH v3 11/34] spapr: Fix indexing of XICS irqs David Gibson
2019-10-02 2:51 ` [PATCH v3 12/34] spapr: Simplify spapr_qirq() handling David Gibson
2019-10-02 2:51 ` [PATCH v3 13/34] spapr: Eliminate SpaprIrq:get_nodename method David Gibson
2019-10-02 2:51 ` [PATCH v3 14/34] spapr: Remove unhelpful tracepoints from spapr_irq_free_xics() David Gibson
2019-10-02 2:51 ` [PATCH v3 15/34] spapr: Handle freeing of multiple irqs in frontend only David Gibson
2019-10-02 5:51 ` Greg Kurz
2019-10-02 5:55 ` Cédric Le Goater
2019-10-02 2:51 ` David Gibson [this message]
2019-10-02 2:51 ` [PATCH v3 17/34] xive: Improve irq claim/free path David Gibson
2019-10-02 2:51 ` [PATCH v3 18/34] spapr: Use less cryptic representation of which irq backends are supported David Gibson
2019-10-02 2:51 ` [PATCH v3 19/34] spapr: Add return value to spapr_irq_check() David Gibson
2019-10-02 5:58 ` Cédric Le Goater
2019-10-02 6:08 ` Greg Kurz
2019-10-02 2:51 ` [PATCH v3 20/34] spapr: Eliminate SpaprIrq::init hook David Gibson
2019-10-02 2:51 ` [PATCH v3 21/34] spapr, xics, xive: Introduce SpaprInterruptController QOM interface David Gibson
2019-10-02 2:51 ` [PATCH v3 22/34] spapr, xics, xive: Move cpu_intc_create from SpaprIrq to SpaprInterruptController David Gibson
2019-10-02 6:06 ` Cédric Le Goater
2019-10-02 6:10 ` David Gibson
2019-10-02 6:13 ` Cédric Le Goater
2019-10-02 6:40 ` David Gibson
2019-10-02 7:31 ` Cédric Le Goater
2019-10-02 22:28 ` David Gibson
2019-10-02 7:13 ` Greg Kurz
2019-10-02 9:41 ` Cédric Le Goater
2019-10-02 2:51 ` [PATCH v3 23/34] spapr, xics, xive: Move irq claim and free " David Gibson
2019-10-02 6:10 ` Cédric Le Goater
2019-10-02 6:16 ` David Gibson
2019-10-02 7:59 ` Greg Kurz
2019-10-02 22:17 ` David Gibson
2019-10-02 9:23 ` Cédric Le Goater
2019-10-02 2:51 ` [PATCH v3 24/34] spapr: Formalize notion of active interrupt controller David Gibson
2019-10-02 2:51 ` [PATCH v3 25/34] spapr, xics, xive: Move set_irq from SpaprIrq to SpaprInterruptController David Gibson
2019-10-02 2:52 ` [PATCH v3 26/34] spapr, xics, xive: Move print_info " David Gibson
2019-10-02 2:52 ` [PATCH v3 27/34] spapr, xics, xive: Move dt_populate " David Gibson
2019-10-02 2:52 ` [PATCH v3 28/34] spapr, xics, xive: Match signatures for XICS and XIVE KVM connect routines David Gibson
2019-10-02 2:52 ` [PATCH v3 29/34] spapr: Remove SpaprIrq::init_kvm hook David Gibson
2019-10-02 2:52 ` [PATCH v3 30/34] spapr, xics, xive: Move SpaprIrq::reset hook logic into activate/deactivate David Gibson
2019-10-02 9:29 ` Greg Kurz
2019-10-03 0:22 ` David Gibson
2019-10-02 2:52 ` [PATCH v3 31/34] spapr, xics, xive: Move SpaprIrq::post_load hook to backends David Gibson
2019-10-02 9:50 ` Greg Kurz
2019-10-02 2:52 ` [PATCH v3 32/34] spapr: Remove SpaprIrq::nr_msis David Gibson
2019-10-02 2:52 ` [PATCH v3 33/34] spapr: Move SpaprIrq::nr_xirqs to SpaprMachineClass David Gibson
2019-10-02 2:52 ` [PATCH v3 34/34] spapr: Remove last pieces of SpaprIrq David Gibson
2019-10-02 10:20 ` Greg Kurz
2019-10-02 22:31 ` David Gibson
2019-10-03 5:19 ` David Gibson
2019-10-03 6:18 ` [PATCH v3 00/34] spapr: IRQ subsystem cleanup David Gibson
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