From patchwork Fri Jul 10 14:21:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 6766341 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B37D49F2F0 for ; Fri, 10 Jul 2015 14:22:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B3EBC20681 for ; Fri, 10 Jul 2015 14:22:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9C0BB206A5 for ; Fri, 10 Jul 2015 14:22:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932873AbbGJOWO (ORCPT ); Fri, 10 Jul 2015 10:22:14 -0400 Received: from foss.arm.com ([217.140.101.70]:51185 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932863AbbGJOWI (ORCPT ); Fri, 10 Jul 2015 10:22:08 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6D3E25F6; Fri, 10 Jul 2015 07:22:32 -0700 (PDT) Received: from e104803-lin.lan (unknown [10.1.203.153]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9363A3F317; Fri, 10 Jul 2015 07:22:06 -0700 (PDT) From: Andre Przywara To: marc.zyngier@arm.com, christoffer.dall@linaro.org, kvmarm@lists.cs.columbia.edu Cc: eric.auger@linaro.org, Pavel Fedin , linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Subject: [PATCH v2 07/15] KVM: arm64: handle ITS related GICv3 redistributor registers Date: Fri, 10 Jul 2015 15:21:43 +0100 Message-Id: <1436538111-4294-8-git-send-email-andre.przywara@arm.com> X-Mailer: git-send-email 2.3.5 In-Reply-To: <1436538111-4294-1-git-send-email-andre.przywara@arm.com> References: <1436538111-4294-1-git-send-email-andre.przywara@arm.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In the GICv3 redistributor there are the PENDBASER and PROPBASER registers which we did not emulate so far, as they only make sense when having an ITS. In preparation for that emulate those MMIO accesses by storing the 64-bit data written into it into a variable which we later read in the ITS emulation. Signed-off-by: Andre Przywara --- include/kvm/arm_vgic.h | 8 ++++++++ virt/kvm/arm/vgic-v3-emul.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ virt/kvm/arm/vgic.c | 35 +++++++++++++++++++++++++++++++++++ virt/kvm/arm/vgic.h | 4 ++++ 4 files changed, 91 insertions(+) diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 3ee063b..8c6cb0e 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -256,6 +256,14 @@ struct vgic_dist { struct vgic_vm_ops vm_ops; struct vgic_io_device dist_iodev; struct vgic_io_device *redist_iodevs; + + /* Address of LPI configuration table shared by all redistributors */ + u64 propbaser; + + /* Addresses of LPI pending tables per redistributor */ + u64 *pendbaser; + + bool lpis_enabled; }; struct vgic_v2_cpu_if { diff --git a/virt/kvm/arm/vgic-v3-emul.c b/virt/kvm/arm/vgic-v3-emul.c index a8cf669..5269ad1 100644 --- a/virt/kvm/arm/vgic-v3-emul.c +++ b/virt/kvm/arm/vgic-v3-emul.c @@ -651,6 +651,38 @@ static bool handle_mmio_cfg_reg_redist(struct kvm_vcpu *vcpu, return vgic_handle_cfg_reg(reg, mmio, offset); } +/* We don't trigger any actions here, just store the register value */ +static bool handle_mmio_propbaser_redist(struct kvm_vcpu *vcpu, + struct kvm_exit_mmio *mmio, + phys_addr_t offset) +{ + struct vgic_dist *dist = &vcpu->kvm->arch.vgic; + int mode = ACCESS_READ_VALUE; + + /* Storing a value with LPIs already enabled is undefined */ + mode |= dist->lpis_enabled ? ACCESS_WRITE_IGNORED : ACCESS_WRITE_VALUE; + vgic_handle_base_register(vcpu, mmio, offset, &dist->propbaser, mode); + + return false; +} + +/* We don't trigger any actions here, just store the register value */ +static bool handle_mmio_pendbaser_redist(struct kvm_vcpu *vcpu, + struct kvm_exit_mmio *mmio, + phys_addr_t offset) +{ + struct kvm_vcpu *rdvcpu = mmio->private; + struct vgic_dist *dist = &vcpu->kvm->arch.vgic; + int mode = ACCESS_READ_VALUE; + + /* Storing a value with LPIs already enabled is undefined */ + mode |= dist->lpis_enabled ? ACCESS_WRITE_IGNORED : ACCESS_WRITE_VALUE; + vgic_handle_base_register(vcpu, mmio, offset, + &dist->pendbaser[rdvcpu->vcpu_id], mode); + + return false; +} + #define SGI_base(x) ((x) + SZ_64K) static const struct vgic_io_range vgic_redist_ranges[] = { @@ -679,6 +711,18 @@ static const struct vgic_io_range vgic_redist_ranges[] = { .handle_mmio = handle_mmio_raz_wi, }, { + .base = GICR_PENDBASER, + .len = 0x08, + .bits_per_irq = 0, + .handle_mmio = handle_mmio_pendbaser_redist, + }, + { + .base = GICR_PROPBASER, + .len = 0x08, + .bits_per_irq = 0, + .handle_mmio = handle_mmio_propbaser_redist, + }, + { .base = GICR_IDREGS, .len = 0x30, .bits_per_irq = 0, diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 15e447f..49ee92b 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -446,6 +446,41 @@ void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg, } } +/* handle a 64-bit register access */ +void vgic_handle_base_register(struct kvm_vcpu *vcpu, + struct kvm_exit_mmio *mmio, + phys_addr_t offset, u64 *basereg, + int mode) +{ + u32 reg; + u64 breg; + + switch (offset & ~3) { + case 0x00: + breg = *basereg; + reg = lower_32_bits(breg); + vgic_reg_access(mmio, ®, offset & 3, mode); + if (mmio->is_write && (mode & ACCESS_WRITE_VALUE)) { + breg &= GENMASK_ULL(63, 32); + breg |= reg; + *basereg = breg; + } + break; + case 0x04: + breg = *basereg; + reg = upper_32_bits(breg); + vgic_reg_access(mmio, ®, offset & 3, mode); + if (mmio->is_write && (mode & ACCESS_WRITE_VALUE)) { + breg = lower_32_bits(breg); + breg |= (u64)reg << 32; + *basereg = breg; + } + break; + } +} + + + bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio, phys_addr_t offset) { diff --git a/virt/kvm/arm/vgic.h b/virt/kvm/arm/vgic.h index a093f5c..b2d791c 100644 --- a/virt/kvm/arm/vgic.h +++ b/virt/kvm/arm/vgic.h @@ -71,6 +71,10 @@ void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg, phys_addr_t offset, int mode); bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio, phys_addr_t offset); +void vgic_handle_base_register(struct kvm_vcpu *vcpu, + struct kvm_exit_mmio *mmio, + phys_addr_t offset, u64 *basereg, + int mode); static inline u32 mmio_data_read(struct kvm_exit_mmio *mmio, u32 mask)