From 2e66cdb715b2df674a9dd1b2899b958a46a98bdc Mon Sep 17 00:00:00 2001 From: =?utf8?q?C=C3=A9dric=20Le=20Goater?= Date: Wed, 13 Feb 2019 22:07:55 +0100 Subject: [PATCH] spapr/irq: add an 'nr_irq' parameter to initialize the backend. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit When using the 'dual' interrupt mode, the source numbers of both sPAPR IRQ backends are aligned to share a common IRQ number space and to use a similar mapping of the machine qemu_irq array which is indexed by the source number. The XICS IRQ number range initially being [ 0x1000 - 0x2000 ], this requires to change the XICS ICSState offset to 0 and to provision for an extra 4K of source numbers and qemu_irqs which will never be used by the machine when running under the XICS interrupt mode. This is not an optimal solution. Change the init() method to allocate an IRQ number space of the expected size for the XICS sPAPR IRQ backend. It breaks the interrupt signaling when under the 'dual' mode because source numbers have unexpected values but next patch will fix that. Signed-off-by: Cédric Le Goater Message-Id: <20190213210756.27032-2-clg@kaod.org> Signed-off-by: David Gibson --- hw/ppc/spapr_irq.c | 18 ++++++++++-------- include/hw/ppc/spapr_irq.h | 2 +- 2 files changed, 11 insertions(+), 9 deletions(-) diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c index 80b0083b8e..da52a46e80 100644 --- a/hw/ppc/spapr_irq.c +++ b/hw/ppc/spapr_irq.c @@ -93,10 +93,10 @@ error: return NULL; } -static void spapr_irq_init_xics(sPAPRMachineState *spapr, Error **errp) +static void spapr_irq_init_xics(sPAPRMachineState *spapr, int nr_irqs, + Error **errp) { MachineState *machine = MACHINE(spapr); - int nr_irqs = spapr->irq->nr_irqs; Error *local_err = NULL; if (kvm_enabled()) { @@ -262,7 +262,8 @@ sPAPRIrq spapr_irq_xics = { /* * XIVE IRQ backend. */ -static void spapr_irq_init_xive(sPAPRMachineState *spapr, Error **errp) +static void spapr_irq_init_xive(sPAPRMachineState *spapr, int nr_irqs, + Error **errp) { MachineState *machine = MACHINE(spapr); uint32_t nr_servers = spapr_max_server_number(spapr); @@ -278,7 +279,7 @@ static void spapr_irq_init_xive(sPAPRMachineState *spapr, Error **errp) } dev = qdev_create(NULL, TYPE_SPAPR_XIVE); - qdev_prop_set_uint32(dev, "nr-irqs", spapr->irq->nr_irqs); + qdev_prop_set_uint32(dev, "nr-irqs", nr_irqs); /* * 8 XIVE END structures per CPU. One for each available priority */ @@ -435,7 +436,8 @@ static sPAPRIrq *spapr_irq_current(sPAPRMachineState *spapr) &spapr_irq_xive : &spapr_irq_xics; } -static void spapr_irq_init_dual(sPAPRMachineState *spapr, Error **errp) +static void spapr_irq_init_dual(sPAPRMachineState *spapr, int nr_irqs, + Error **errp) { MachineState *machine = MACHINE(spapr); Error *local_err = NULL; @@ -445,7 +447,7 @@ static void spapr_irq_init_dual(sPAPRMachineState *spapr, Error **errp) return; } - spapr_irq_xics.init(spapr, &local_err); + spapr_irq_xics.init(spapr, spapr_irq_xics.nr_irqs, &local_err); if (local_err) { error_propagate(errp, local_err); return; @@ -462,7 +464,7 @@ static void spapr_irq_init_dual(sPAPRMachineState *spapr, Error **errp) */ spapr->ics->offset = 0; - spapr_irq_xive.init(spapr, &local_err); + spapr_irq_xive.init(spapr, spapr_irq_xive.nr_irqs, &local_err); if (local_err) { error_propagate(errp, local_err); return; @@ -618,7 +620,7 @@ void spapr_irq_init(sPAPRMachineState *spapr, Error **errp) spapr_irq_msi_init(spapr, spapr->irq->nr_msis); } - spapr->irq->init(spapr, errp); + spapr->irq->init(spapr, spapr->irq->nr_irqs, errp); spapr->qirqs = qemu_allocate_irqs(spapr->irq->set_irq, spapr, spapr->irq->nr_irqs); diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h index 14b02c3aca..488511c3d8 100644 --- a/include/hw/ppc/spapr_irq.h +++ b/include/hw/ppc/spapr_irq.h @@ -35,7 +35,7 @@ typedef struct sPAPRIrq { uint32_t nr_msis; uint8_t ov5; - void (*init)(sPAPRMachineState *spapr, Error **errp); + void (*init)(sPAPRMachineState *spapr, int nr_irqs, Error **errp); int (*claim)(sPAPRMachineState *spapr, int irq, bool lsi, Error **errp); void (*free)(sPAPRMachineState *spapr, int irq, int num); qemu_irq (*qirq)(sPAPRMachineState *spapr, int irq); -- 2.11.4.GIT