From mboxrd@z Thu Jan 1 00:00:00 1970 From: andre.przywara@arm.com (Andre Przywara) Date: Fri, 13 Mar 2015 16:10:12 +0000 Subject: [PATCH 12/12] KVM: arm/arm64: remove now obsolete VGIC specific MMIO handling code In-Reply-To: <1426263012-22935-1-git-send-email-andre.przywara@arm.com> References: <1426263012-22935-1-git-send-email-andre.przywara@arm.com> Message-ID: <1426263012-22935-13-git-send-email-andre.przywara@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org With all of the virtual GIC emulation code now being registered with the kvm_io_bus, we can remove all of the old MMIO handling code and its dispatching functionality. Signed-off-by: Andre Przywara --- include/kvm/arm_vgic.h | 2 -- virt/kvm/arm/vgic-v2-emul.c | 19 ------------ virt/kvm/arm/vgic-v3-emul.c | 39 ------------------------ virt/kvm/arm/vgic.c | 71 ------------------------------------------- virt/kvm/arm/vgic.h | 5 --- 5 files changed, 136 deletions(-) diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 91976c8..14d8401 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -140,8 +140,6 @@ struct vgic_params { }; struct vgic_vm_ops { - bool (*handle_mmio)(struct kvm_vcpu *, struct kvm_run *, - struct kvm_exit_mmio *); bool (*queue_sgi)(struct kvm_vcpu *, int irq); void (*add_sgi_source)(struct kvm_vcpu *, int irq, int source); int (*init_model)(struct kvm *); diff --git a/virt/kvm/arm/vgic-v2-emul.c b/virt/kvm/arm/vgic-v2-emul.c index 6f685c9..ff264e7 100644 --- a/virt/kvm/arm/vgic-v2-emul.c +++ b/virt/kvm/arm/vgic-v2-emul.c @@ -388,24 +388,6 @@ static const struct vgic_io_range vgic_dist_ranges[] = { {} }; -static bool vgic_v2_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run, - struct kvm_exit_mmio *mmio) -{ - unsigned long base = vcpu->kvm->arch.vgic.vgic_dist_base; - - if (!is_in_range(mmio->phys_addr, mmio->len, base, - KVM_VGIC_V2_DIST_SIZE)) - return false; - - /* GICv2 does not support accesses wider than 32 bits */ - if (mmio->len > 4) { - kvm_inject_dabt(vcpu, mmio->phys_addr); - return true; - } - - return vgic_handle_mmio_range(vcpu, run, mmio, vgic_dist_ranges, base); -} - static void vgic_dispatch_sgi(struct kvm_vcpu *vcpu, u32 reg) { struct kvm *kvm = vcpu->kvm; @@ -559,7 +541,6 @@ void vgic_v2_init_emulation(struct kvm *kvm) { struct vgic_dist *dist = &kvm->arch.vgic; - dist->vm_ops.handle_mmio = vgic_v2_handle_mmio; dist->vm_ops.queue_sgi = vgic_v2_queue_sgi; dist->vm_ops.add_sgi_source = vgic_v2_add_sgi_source; dist->vm_ops.init_model = vgic_v2_init_model; diff --git a/virt/kvm/arm/vgic-v3-emul.c b/virt/kvm/arm/vgic-v3-emul.c index 8a81c67..4957577 100644 --- a/virt/kvm/arm/vgic-v3-emul.c +++ b/virt/kvm/arm/vgic-v3-emul.c @@ -710,45 +710,7 @@ static const struct vgic_io_range vgic_redist_ranges[] = { {}, }; -/* - * This function splits accesses between the distributor and the two - * redistributor parts (private/SPI). As each redistributor is accessible - * from any CPU, we have to determine the affected VCPU by taking the faulting - * address into account. We then pass this VCPU to the handler function via - * the private parameter. - */ #define SGI_BASE_OFFSET SZ_64K -static bool vgic_v3_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run, - struct kvm_exit_mmio *mmio) -{ - struct vgic_dist *dist = &vcpu->kvm->arch.vgic; - unsigned long dbase = dist->vgic_dist_base; - unsigned long rdbase = dist->vgic_redist_base; - int nrcpus = atomic_read(&vcpu->kvm->online_vcpus); - int vcpu_id; - const struct vgic_io_range *mmio_range; - - if (is_in_range(mmio->phys_addr, mmio->len, dbase, GIC_V3_DIST_SIZE)) { - return vgic_handle_mmio_range(vcpu, run, mmio, - vgic_v3_dist_ranges, dbase); - } - - if (!is_in_range(mmio->phys_addr, mmio->len, rdbase, - GIC_V3_REDIST_SIZE * nrcpus)) - return false; - - vcpu_id = (mmio->phys_addr - rdbase) / GIC_V3_REDIST_SIZE; - rdbase += (vcpu_id * GIC_V3_REDIST_SIZE); - mmio->private = kvm_get_vcpu(vcpu->kvm, vcpu_id); - - if (mmio->phys_addr >= rdbase + SGI_BASE_OFFSET) { - rdbase += SGI_BASE_OFFSET; - mmio_range = vgic_redist_sgi_ranges; - } else { - mmio_range = vgic_redist_ranges; - } - return vgic_handle_mmio_range(vcpu, run, mmio, mmio_range, rdbase); -} static bool vgic_v3_queue_sgi(struct kvm_vcpu *vcpu, int irq) { @@ -862,7 +824,6 @@ void vgic_v3_init_emulation(struct kvm *kvm) { struct vgic_dist *dist = &kvm->arch.vgic; - dist->vm_ops.handle_mmio = vgic_v3_handle_mmio; dist->vm_ops.queue_sgi = vgic_v3_queue_sgi; dist->vm_ops.add_sgi_source = vgic_v3_add_sgi_source; dist->vm_ops.init_model = vgic_v3_init_model; diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index f762738..f8a79d4 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -729,53 +729,6 @@ static bool call_range_handler(struct kvm_vcpu *vcpu, } /** - * vgic_handle_mmio_range - handle an in-kernel MMIO access - * @vcpu: pointer to the vcpu performing the access - * @run: pointer to the kvm_run structure - * @mmio: pointer to the data describing the access - * @ranges: array of MMIO ranges in a given region - * @mmio_base: base address of that region - * - * returns true if the MMIO access could be performed - */ -bool vgic_handle_mmio_range(struct kvm_vcpu *vcpu, struct kvm_run *run, - struct kvm_exit_mmio *mmio, - const struct vgic_io_range *ranges, - unsigned long mmio_base) -{ - const struct vgic_io_range *range; - struct vgic_dist *dist = &vcpu->kvm->arch.vgic; - bool updated_state; - unsigned long offset; - - offset = mmio->phys_addr - mmio_base; - range = vgic_find_range(ranges, mmio->len, offset); - if (unlikely(!range || !range->handle_mmio)) { - pr_warn("Unhandled access %d %08llx %d\n", - mmio->is_write, mmio->phys_addr, mmio->len); - return false; - } - - spin_lock(&vcpu->kvm->arch.vgic.lock); - offset -= range->base; - if (vgic_validate_access(dist, range, offset)) { - updated_state = call_range_handler(vcpu, mmio, offset, range); - } else { - if (!mmio->is_write) - memset(mmio->data, 0, mmio->len); - updated_state = false; - } - spin_unlock(&vcpu->kvm->arch.vgic.lock); - kvm_prepare_mmio(run, mmio); - kvm_handle_mmio_return(vcpu, run); - - if (updated_state) - vgic_kick_vcpus(vcpu->kvm); - - return true; -} - -/** * vgic_handle_mmio_access - handle an in-kernel MMIO access * This is called by the read/write KVM IO device wrappers below. * @vcpu: pointer to the vcpu performing the access @@ -835,30 +788,6 @@ static int vgic_handle_mmio_access(struct kvm_vcpu *vcpu, return 0; } -/** - * vgic_handle_mmio - handle an in-kernel MMIO access for the GIC emulation - * @vcpu: pointer to the vcpu performing the access - * @run: pointer to the kvm_run structure - * @mmio: pointer to the data describing the access - * - * returns true if the MMIO access has been performed in kernel space, - * and false if it needs to be emulated in user space. - * Calls the actual handling routine for the selected VGIC model. - */ -bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run, - struct kvm_exit_mmio *mmio) -{ - if (!irqchip_in_kernel(vcpu->kvm)) - return false; - - /* - * This will currently call either vgic_v2_handle_mmio() or - * vgic_v3_handle_mmio(), which in turn will call - * vgic_handle_mmio_range() defined above. - */ - return vcpu->kvm->arch.vgic.vm_ops.handle_mmio(vcpu, run, mmio); -} - static int vgic_handle_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this, gpa_t addr, int len, void *val) diff --git a/virt/kvm/arm/vgic.h b/virt/kvm/arm/vgic.h index f2063a7..5dc55f2 100644 --- a/virt/kvm/arm/vgic.h +++ b/virt/kvm/arm/vgic.h @@ -99,11 +99,6 @@ const struct vgic_io_range *vgic_find_range(const struct vgic_io_range *ranges, int len, gpa_t offset); -bool vgic_handle_mmio_range(struct kvm_vcpu *vcpu, struct kvm_run *run, - struct kvm_exit_mmio *mmio, - const struct vgic_io_range *ranges, - unsigned long mmio_base); - bool vgic_handle_enable_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio, phys_addr_t offset, int vcpu_id, int access); -- 1.7.9.5