From nobody Tue Feb 10 15:01:16 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1529343549607449.7427459952737; Mon, 18 Jun 2018 10:39:09 -0700 (PDT) Received: from localhost ([::1]:36267 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUy7K-0000Fe-TO for importer@patchew.org; Mon, 18 Jun 2018 13:39:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36877) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUy2t-00067u-R7 for qemu-devel@nongnu.org; Mon, 18 Jun 2018 13:34:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fUy2r-0001ma-5G for qemu-devel@nongnu.org; Mon, 18 Jun 2018 13:34:27 -0400 Received: from 16.mo1.mail-out.ovh.net ([178.33.104.224]:48455) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fUy2q-0001m3-Ic for qemu-devel@nongnu.org; Mon, 18 Jun 2018 13:34:24 -0400 Received: from player688.ha.ovh.net (unknown [10.109.122.113]) by mo1.mail-out.ovh.net (Postfix) with ESMTP id 06F17108B66 for ; Mon, 18 Jun 2018 19:34:22 +0200 (CEST) Received: from zorba.kaod.org (LFbn-TOU-1-49-10.w86-201.abo.wanadoo.fr [86.201.141.10]) (Authenticated sender: clg@kaod.org) by player688.ha.ovh.net (Postfix) with ESMTPSA id B8E7D20097; Mon, 18 Jun 2018 19:34:18 +0200 (CEST) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-ppc@nongnu.org Date: Mon, 18 Jun 2018 19:34:02 +0200 Message-Id: <20180618173402.23405-4-clg@kaod.org> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180618173402.23405-1-clg@kaod.org> References: <20180618173402.23405-1-clg@kaod.org> MIME-Version: 1.0 X-Ovh-Tracer-Id: 17086094037921336147 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedthedruddtvddgudduvdcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 178.33.104.224 Subject: [Qemu-devel] [PATCH v2 3/3] spapr: introduce a fixed IRQ number space X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , qemu-devel@nongnu.org, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" This proposal introduces a new IRQ number space layout using static numbers for all devices and a bitmap allocator for the MSI numbers which are negotiated by the guest at runtime. The previous layout is kept in machines raising the 'xics_legacy' flag. Signed-off-by: C=C3=A9dric Le Goater --- include/hw/ppc/spapr.h | 4 ++++ include/hw/ppc/spapr_irq.h | 30 +++++++++++++++++++++++++ hw/ppc/spapr.c | 31 +++++++++++++++++++++++++ hw/ppc/spapr_events.c | 12 ++++++++-- hw/ppc/spapr_irq.c | 56 ++++++++++++++++++++++++++++++++++++++++++= ++++ hw/ppc/spapr_pci.c | 28 ++++++++++++++++++----- hw/ppc/spapr_vio.c | 19 ++++++++++++---- hw/ppc/Makefile.objs | 2 +- 8 files changed, 169 insertions(+), 13 deletions(-) create mode 100644 include/hw/ppc/spapr_irq.h create mode 100644 hw/ppc/spapr_irq.c diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 9decc66a1915..4c63b1fac13b 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -7,6 +7,7 @@ #include "hw/ppc/spapr_drc.h" #include "hw/mem/pc-dimm.h" #include "hw/ppc/spapr_ovec.h" +#include "hw/ppc/spapr_irq.h" =20 struct VIOsPAPRBus; struct sPAPRPHBState; @@ -164,6 +165,9 @@ struct sPAPRMachineState { char *kvm_type; =20 const char *icp_type; + bool xics_legacy; + int32_t irq_map_nr; + unsigned long *irq_map; =20 bool cmd_line_caps[SPAPR_CAP_NUM]; sPAPRCapabilities def, eff, mig; diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h new file mode 100644 index 000000000000..345a42efd366 --- /dev/null +++ b/include/hw/ppc/spapr_irq.h @@ -0,0 +1,30 @@ +/* + * QEMU PowerPC sPAPR IRQ backend definitions + * + * Copyright (c) 2018, IBM Corporation. + * + * This code is licensed under the GPL version 2 or later. See the + * COPYING file in the top-level directory. + */ + +#ifndef HW_SPAPR_IRQ_H +#define HW_SPAPR_IRQ_H + +/* + * IRQ range offsets per device type + */ +#define SPAPR_IRQ_EPOW 0x1000 /* XICS_IRQ_BASE offset */ +#define SPAPR_IRQ_HOTPLUG 0x1001 +#define SPAPR_IRQ_VIO 0x1100 /* 256 VIO devices */ +#define SPAPR_IRQ_PCI_LSI 0x1200 /* 32+ PHBs devices */ + +#define SPAPR_IRQ_MSI 0x1300 /* Offset of the dynamic range covered + * by the bitmap allocator */ + +void spapr_irq_msi_init(sPAPRMachineState *spapr, uint32_t nr_irqs); +int spapr_irq_msi_alloc(sPAPRMachineState *spapr, uint32_t num, bool align, + Error **errp); +void spapr_irq_msi_free(sPAPRMachineState *spapr, int irq, uint32_t num); +void spapr_irq_msi_reset(sPAPRMachineState *spapr); + +#endif diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 2b6d17056012..b9ba3ae675e5 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -188,6 +188,11 @@ static void xics_system_init(MachineState *machine, in= t nr_irqs, Error **errp) sPAPRMachineState *spapr =3D SPAPR_MACHINE(machine); Error *local_err =3D NULL; =20 + /* Initialize the MSI IRQ allocator. */ + if (!spapr->xics_legacy) { + spapr_irq_msi_init(spapr, nr_irqs); + } + if (kvm_enabled()) { if (machine_kernel_irqchip_allowed(machine) && !xics_kvm_init(spapr, &local_err)) { @@ -1635,6 +1640,10 @@ static void spapr_machine_reset(void) ppc_set_compat(first_ppc_cpu, spapr->max_compat_pvr, &error_fatal); } =20 + if (!spapr->xics_legacy) { + spapr_irq_msi_reset(spapr); + } + qemu_devices_reset(); =20 /* DRC reset may cause a device to be unplugged. This will cause troub= les @@ -1909,6 +1918,24 @@ static const VMStateDescription vmstate_spapr_patb_e= ntry =3D { }, }; =20 +static bool spapr_irq_map_needed(void *opaque) +{ + sPAPRMachineState *spapr =3D opaque; + + return spapr->irq_map && !bitmap_empty(spapr->irq_map, spapr->irq_map_= nr); +} + +static const VMStateDescription vmstate_spapr_irq_map =3D { + .name =3D "spapr_irq_map", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D spapr_irq_map_needed, + .fields =3D (VMStateField[]) { + VMSTATE_BITMAP(irq_map, sPAPRMachineState, 0, irq_map_nr), + VMSTATE_END_OF_LIST() + }, +}; + static const VMStateDescription vmstate_spapr =3D { .name =3D "spapr", .version_id =3D 3, @@ -1936,6 +1963,7 @@ static const VMStateDescription vmstate_spapr =3D { &vmstate_spapr_cap_cfpc, &vmstate_spapr_cap_sbbc, &vmstate_spapr_cap_ibs, + &vmstate_spapr_irq_map, NULL } }; @@ -4093,7 +4121,10 @@ DEFINE_SPAPR_MACHINE(3_0, "3.0", true); =20 static void spapr_machine_2_12_instance_options(MachineState *machine) { + sPAPRMachineState *spapr =3D SPAPR_MACHINE(machine); + spapr_machine_3_0_instance_options(machine); + spapr->xics_legacy =3D true; } =20 static void spapr_machine_2_12_class_options(MachineClass *mc) diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c index e4f5946a2188..c82dc40be0d5 100644 --- a/hw/ppc/spapr_events.c +++ b/hw/ppc/spapr_events.c @@ -709,7 +709,11 @@ void spapr_events_init(sPAPRMachineState *spapr) { int epow_irq; =20 - epow_irq =3D spapr_irq_findone(spapr, &error_fatal); + if (spapr->xics_legacy) { + epow_irq =3D spapr_irq_findone(spapr, &error_fatal); + } else { + epow_irq =3D SPAPR_IRQ_EPOW; + } =20 spapr_irq_claim(spapr, epow_irq, false, &error_fatal); =20 @@ -731,7 +735,11 @@ void spapr_events_init(sPAPRMachineState *spapr) if (spapr->use_hotplug_event_source) { int hp_irq; =20 - hp_irq =3D spapr_irq_findone(spapr, &error_fatal); + if (spapr->xics_legacy) { + hp_irq =3D spapr_irq_findone(spapr, &error_fatal); + } else { + hp_irq =3D SPAPR_IRQ_HOTPLUG; + } =20 spapr_irq_claim(spapr, hp_irq, false, &error_fatal); =20 diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c new file mode 100644 index 000000000000..4e311023bab2 --- /dev/null +++ b/hw/ppc/spapr_irq.c @@ -0,0 +1,56 @@ +/* + * QEMU PowerPC sPAPR IRQ interface + * + * Copyright (c) 2018, IBM Corporation. + * + * This code is licensed under the GPL version 2 or later. See the + * COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "qemu/error-report.h" +#include "qapi/error.h" +#include "hw/ppc/spapr.h" +#include "hw/ppc/xics.h" + +void spapr_irq_msi_init(sPAPRMachineState *spapr, uint32_t nr_irqs) +{ + spapr->irq_map_nr =3D XICS_IRQ_BASE + nr_irqs - SPAPR_IRQ_MSI; + spapr->irq_map =3D bitmap_new(spapr->irq_map_nr); +} + +int spapr_irq_msi_alloc(sPAPRMachineState *spapr, uint32_t num, bool align, + Error **errp) +{ + int irq; + + /* + * The 'align_mask' parameter of bitmap_find_next_zero_area() + * should be one less than a power of 2; 0 means no + * alignment. Adapt the 'align' value of the former allocator + * to fit the requirements of bitmap_find_next_zero_area() + */ + align -=3D 1; + + irq =3D bitmap_find_next_zero_area(spapr->irq_map, spapr->irq_map_nr, = 0, num, + align); + if (irq =3D=3D spapr->irq_map_nr) { + error_setg(errp, "can't find a free %d-IRQ block", num); + return -1; + } + + bitmap_set(spapr->irq_map, irq, num); + + return irq + SPAPR_IRQ_MSI; +} + +void spapr_irq_msi_free(sPAPRMachineState *spapr, int irq, uint32_t num) +{ + bitmap_clear(spapr->irq_map, irq - SPAPR_IRQ_MSI, num); +} + +void spapr_irq_msi_reset(sPAPRMachineState *spapr) +{ + bitmap_clear(spapr->irq_map, 0, spapr->irq_map_nr); +} diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 497b896c7d24..bbf48fd3503d 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -334,6 +334,9 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRM= achineState *spapr, return; } =20 + if (!spapr->xics_legacy) { + spapr_irq_msi_free(spapr, msi->first_irq, msi->num); + } spapr_irq_free(spapr, msi->first_irq, msi->num); if (msi_present(pdev)) { spapr_msi_setmsg(pdev, 0, false, 0, 0); @@ -372,7 +375,13 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPR= MachineState *spapr, } =20 /* Allocate MSIs */ - irq =3D spapr_irq_find(spapr, req_num, ret_intr_type =3D=3D RTAS_TYPE_= MSI, &err); + if (spapr->xics_legacy) { + irq =3D spapr_irq_find(spapr, req_num, ret_intr_type =3D=3D RTAS_T= YPE_MSI, + &err); + } else { + irq =3D spapr_irq_msi_alloc(spapr, req_num, + ret_intr_type =3D=3D RTAS_TYPE_MSI, &err= ); + } if (err) { error_reportf_err(err, "Can't allocate MSIs for device %x: ", config_addr); @@ -392,6 +401,9 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRM= achineState *spapr, =20 /* Release previous MSIs */ if (msi) { + if (!spapr->xics_legacy) { + spapr_irq_msi_free(spapr, msi->first_irq, msi->num); + } spapr_irq_free(spapr, msi->first_irq, msi->num); g_hash_table_remove(phb->msi, &config_addr); } @@ -1708,11 +1720,15 @@ static void spapr_phb_realize(DeviceState *dev, Err= or **errp) uint32_t irq; Error *local_err =3D NULL; =20 - irq =3D spapr_irq_findone(spapr, &local_err); - if (local_err) { - error_propagate(errp, local_err); - error_prepend(errp, "can't allocate LSIs: "); - return; + if (spapr->xics_legacy) { + irq =3D spapr_irq_findone(spapr, &local_err); + if (local_err) { + error_propagate(errp, local_err); + error_prepend(errp, "can't allocate LSIs: "); + return; + } + } else { + irq =3D SPAPR_IRQ_PCI_LSI + sphb->index * PCI_NUM_PINS + i; } =20 spapr_irq_claim(spapr, irq, true, &local_err); diff --git a/hw/ppc/spapr_vio.c b/hw/ppc/spapr_vio.c index daf85130b5ef..ecee4b2d03da 100644 --- a/hw/ppc/spapr_vio.c +++ b/hw/ppc/spapr_vio.c @@ -436,6 +436,9 @@ static void spapr_vio_busdev_reset(DeviceState *qdev) } } =20 +/* TODO : poor VIO device indexing ... */ +static uint32_t vio_index; + static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp) { sPAPRMachineState *spapr =3D SPAPR_MACHINE(qdev_get_machine()); @@ -476,10 +479,18 @@ static void spapr_vio_busdev_realize(DeviceState *qde= v, Error **errp) } =20 if (!dev->irq) { - dev->irq =3D spapr_irq_findone(spapr, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; + if (spapr->xics_legacy) { + dev->irq =3D spapr_irq_findone(spapr, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + } else { + dev->irq =3D SPAPR_IRQ_VIO + vio_index++; + if (dev->irq =3D=3D SPAPR_IRQ_PCI_LSI) { + error_setg(errp, "Too many VIO devices"); + return; + } } } =20 diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs index 86d82a6ec3ac..4fe3b7804d43 100644 --- a/hw/ppc/Makefile.objs +++ b/hw/ppc/Makefile.objs @@ -4,7 +4,7 @@ obj-y +=3D ppc.o ppc_booke.o fdt.o obj-$(CONFIG_PSERIES) +=3D spapr.o spapr_caps.o spapr_vio.o spapr_events.o obj-$(CONFIG_PSERIES) +=3D spapr_hcall.o spapr_iommu.o spapr_rtas.o obj-$(CONFIG_PSERIES) +=3D spapr_pci.o spapr_rtc.o spapr_drc.o spapr_rng.o -obj-$(CONFIG_PSERIES) +=3D spapr_cpu_core.o spapr_ovec.o +obj-$(CONFIG_PSERIES) +=3D spapr_cpu_core.o spapr_ovec.o spapr_irq.o # IBM PowerNV obj-$(CONFIG_POWERNV) +=3D pnv.o pnv_xscom.o pnv_core.o pnv_lpc.o pnv_psi.= o pnv_occ.o pnv_bmc.o ifeq ($(CONFIG_PCI)$(CONFIG_PSERIES)$(CONFIG_LINUX), yyy) --=20 2.13.6