From patchwork Tue May 22 07:55:08 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 10417547 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 939B860224 for ; Tue, 22 May 2018 08:01:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8820A28558 for ; Tue, 22 May 2018 08:01:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7CB8F28B5C; Tue, 22 May 2018 08:01:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A729328558 for ; Tue, 22 May 2018 08:01:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751453AbeEVIBR (ORCPT ); Tue, 22 May 2018 04:01:17 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:39638 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750707AbeEVHzi (ORCPT ); Tue, 22 May 2018 03:55:38 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3CD837D83A; Tue, 22 May 2018 07:55:38 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-116-69.ams2.redhat.com [10.36.116.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id F3FE985798; Tue, 22 May 2018 07:55:35 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, marc.zyngier@arm.com, christoffer.dall@arm.com, peter.maydell@linaro.org Cc: andre.przywara@arm.com, drjones@redhat.com, wei@redhat.com Subject: [PATCH v8 03/13] KVM: arm/arm64: Replace the single rdist region by a list Date: Tue, 22 May 2018 09:55:08 +0200 Message-Id: <1526975718-18567-4-git-send-email-eric.auger@redhat.com> In-Reply-To: <1526975718-18567-1-git-send-email-eric.auger@redhat.com> References: <1526975718-18567-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Tue, 22 May 2018 07:55:38 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Tue, 22 May 2018 07:55:38 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'eric.auger@redhat.com' RCPT:'' Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP At the moment KVM supports a single rdist region. We want to support several separate rdist regions so let's introduce a list of them. This patch currently only cares about a single entry in this list as the functionality to register several redist regions is not yet there. So this only translates the existing code into something functionally similar using that new data struct. The redistributor region handle is stored in the vgic_cpu structure to allow later computation of the TYPER last bit. Signed-off-by: Eric Auger Reviewed-by: Christoffer Dall --- v4 -> v5: - replaced some uint_t by u v3 -> v4: - Added Christoffer's R-b --- include/kvm/arm_vgic.h | 14 +++++++++---- virt/kvm/arm/vgic/vgic-init.c | 16 ++++++++++++-- virt/kvm/arm/vgic/vgic-kvm-device.c | 13 ++++++++++-- virt/kvm/arm/vgic/vgic-mmio-v3.c | 42 ++++++++++++++++++++++++++++--------- virt/kvm/arm/vgic/vgic-v3.c | 20 +++++++++++------- 5 files changed, 79 insertions(+), 26 deletions(-) diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index e7efe12..90e489f 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -201,6 +201,14 @@ struct vgic_its { struct vgic_state_iter; +struct vgic_redist_region { + u32 index; + gpa_t base; + u32 count; /* number of redistributors or 0 if single region */ + u32 free_index; /* index of the next free redistributor */ + struct list_head list; +}; + struct vgic_dist { bool in_kernel; bool ready; @@ -220,10 +228,7 @@ struct vgic_dist { /* either a GICv2 CPU interface */ gpa_t vgic_cpu_base; /* or a number of GICv3 redistributor regions */ - struct { - gpa_t vgic_redist_base; - gpa_t vgic_redist_free_offset; - }; + struct list_head rd_regions; }; /* distributor enabled */ @@ -311,6 +316,7 @@ struct vgic_cpu { */ struct vgic_io_device rd_iodev; struct vgic_io_device sgi_iodev; + struct vgic_redist_region *rdreg; /* Contains the attributes and gpa of the LPI pending tables. */ u64 pendbaser; diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index 9a5aed7..8901b2d 100644 --- a/virt/kvm/arm/vgic/vgic-init.c +++ b/virt/kvm/arm/vgic/vgic-init.c @@ -167,8 +167,11 @@ int kvm_vgic_create(struct kvm *kvm, u32 type) kvm->arch.vgic.vgic_model = type; kvm->arch.vgic.vgic_dist_base = VGIC_ADDR_UNDEF; - kvm->arch.vgic.vgic_cpu_base = VGIC_ADDR_UNDEF; - kvm->arch.vgic.vgic_redist_base = VGIC_ADDR_UNDEF; + + if (type == KVM_DEV_TYPE_ARM_VGIC_V2) + kvm->arch.vgic.vgic_cpu_base = VGIC_ADDR_UNDEF; + else + INIT_LIST_HEAD(&kvm->arch.vgic.rd_regions); out_unlock: for (; vcpu_lock_idx >= 0; vcpu_lock_idx--) { @@ -303,6 +306,7 @@ int vgic_init(struct kvm *kvm) static void kvm_vgic_dist_destroy(struct kvm *kvm) { struct vgic_dist *dist = &kvm->arch.vgic; + struct vgic_redist_region *rdreg, *next; dist->ready = false; dist->initialized = false; @@ -311,6 +315,14 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm) dist->spis = NULL; dist->nr_spis = 0; + if (kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) { + list_for_each_entry_safe(rdreg, next, &dist->rd_regions, list) { + list_del(&rdreg->list); + kfree(rdreg); + } + INIT_LIST_HEAD(&dist->rd_regions); + } + if (vgic_supports_direct_msis(kvm)) vgic_v4_teardown(kvm); } diff --git a/virt/kvm/arm/vgic/vgic-kvm-device.c b/virt/kvm/arm/vgic/vgic-kvm-device.c index 10ae6f3..76ab369 100644 --- a/virt/kvm/arm/vgic/vgic-kvm-device.c +++ b/virt/kvm/arm/vgic/vgic-kvm-device.c @@ -66,6 +66,7 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) int r = 0; struct vgic_dist *vgic = &kvm->arch.vgic; phys_addr_t *addr_ptr, alignment; + u64 undef_value = VGIC_ADDR_UNDEF; mutex_lock(&kvm->lock); switch (type) { @@ -84,7 +85,9 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) addr_ptr = &vgic->vgic_dist_base; alignment = SZ_64K; break; - case KVM_VGIC_V3_ADDR_TYPE_REDIST: + case KVM_VGIC_V3_ADDR_TYPE_REDIST: { + struct vgic_redist_region *rdreg; + r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3); if (r) break; @@ -92,8 +95,14 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) r = vgic_v3_set_redist_base(kvm, *addr); goto out; } - addr_ptr = &vgic->vgic_redist_base; + rdreg = list_first_entry(&vgic->rd_regions, + struct vgic_redist_region, list); + if (!rdreg) + addr_ptr = &undef_value; + else + addr_ptr = &rdreg->base; break; + } default: r = -ENODEV; } diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c index 671fe81..d1aab18 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c @@ -580,8 +580,10 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; struct vgic_dist *vgic = &kvm->arch.vgic; + struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; struct vgic_io_device *rd_dev = &vcpu->arch.vgic_cpu.rd_iodev; struct vgic_io_device *sgi_dev = &vcpu->arch.vgic_cpu.sgi_iodev; + struct vgic_redist_region *rdreg; gpa_t rd_base, sgi_base; int ret; @@ -591,13 +593,17 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu) * function for all VCPUs when the base address is set. Just return * without doing any work for now. */ - if (IS_VGIC_ADDR_UNDEF(vgic->vgic_redist_base)) + rdreg = list_first_entry(&vgic->rd_regions, + struct vgic_redist_region, list); + if (!rdreg) return 0; if (!vgic_v3_check_base(kvm)) return -EINVAL; - rd_base = vgic->vgic_redist_base + vgic->vgic_redist_free_offset; + vgic_cpu->rdreg = rdreg; + + rd_base = rdreg->base + rdreg->free_index * KVM_VGIC_V3_REDIST_SIZE; sgi_base = rd_base + SZ_64K; kvm_iodevice_init(&rd_dev->dev, &kvm_io_gic_ops); @@ -631,7 +637,7 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu) goto out; } - vgic->vgic_redist_free_offset += 2 * SZ_64K; + rdreg->free_index++; out: mutex_unlock(&kvm->slots_lock); return ret; @@ -673,19 +679,31 @@ static int vgic_register_all_redist_iodevs(struct kvm *kvm) int vgic_v3_set_redist_base(struct kvm *kvm, u64 addr) { struct vgic_dist *vgic = &kvm->arch.vgic; + struct vgic_redist_region *rdreg; int ret; /* vgic_check_ioaddr makes sure we don't do this twice */ - ret = vgic_check_ioaddr(kvm, &vgic->vgic_redist_base, addr, SZ_64K); - if (ret) - return ret; - - vgic->vgic_redist_base = addr; - if (!vgic_v3_check_base(kvm)) { - vgic->vgic_redist_base = VGIC_ADDR_UNDEF; + if (!list_empty(&vgic->rd_regions)) return -EINVAL; + + rdreg = kzalloc(sizeof(*rdreg), GFP_KERNEL); + if (!rdreg) + return -ENOMEM; + + rdreg->base = VGIC_ADDR_UNDEF; + + ret = vgic_check_ioaddr(kvm, &rdreg->base, addr, SZ_64K); + if (ret) + goto out; + + rdreg->base = addr; + if (!vgic_v3_check_base(kvm)) { + ret = -EINVAL; + goto out; } + list_add(&rdreg->list, &vgic->rd_regions); + /* * Register iodevs for each existing VCPU. Adding more VCPUs * afterwards will register the iodevs when needed. @@ -695,6 +713,10 @@ int vgic_v3_set_redist_base(struct kvm *kvm, u64 addr) return ret; return 0; + +out: + kfree(rdreg); + return ret; } int vgic_v3_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr) diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index bdcf8e7..0bb019f 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -427,6 +427,9 @@ bool vgic_v3_check_base(struct kvm *kvm) { struct vgic_dist *d = &kvm->arch.vgic; gpa_t redist_size = KVM_VGIC_V3_REDIST_SIZE; + struct vgic_redist_region *rdreg = + list_first_entry(&d->rd_regions, + struct vgic_redist_region, list); redist_size *= atomic_read(&kvm->online_vcpus); @@ -434,18 +437,17 @@ bool vgic_v3_check_base(struct kvm *kvm) d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE < d->vgic_dist_base) return false; - if (!IS_VGIC_ADDR_UNDEF(d->vgic_redist_base) && - d->vgic_redist_base + redist_size < d->vgic_redist_base) + if (rdreg && (rdreg->base + redist_size < rdreg->base)) return false; /* Both base addresses must be set to check if they overlap */ - if (IS_VGIC_ADDR_UNDEF(d->vgic_dist_base) || - IS_VGIC_ADDR_UNDEF(d->vgic_redist_base)) + if (IS_VGIC_ADDR_UNDEF(d->vgic_dist_base) || !rdreg) return true; - if (d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE <= d->vgic_redist_base) + if (d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE <= rdreg->base) return true; - if (d->vgic_redist_base + redist_size <= d->vgic_dist_base) + + if (rdreg->base + redist_size <= d->vgic_dist_base) return true; return false; @@ -455,12 +457,14 @@ int vgic_v3_map_resources(struct kvm *kvm) { int ret = 0; struct vgic_dist *dist = &kvm->arch.vgic; + struct vgic_redist_region *rdreg = + list_first_entry(&dist->rd_regions, + struct vgic_redist_region, list); if (vgic_ready(kvm)) goto out; - if (IS_VGIC_ADDR_UNDEF(dist->vgic_dist_base) || - IS_VGIC_ADDR_UNDEF(dist->vgic_redist_base)) { + if (IS_VGIC_ADDR_UNDEF(dist->vgic_dist_base) || !rdreg) { kvm_err("Need to set vgic distributor addresses first\n"); ret = -ENXIO; goto out;