From patchwork Mon Jul 28 13:57:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haojian Zhuang X-Patchwork-Id: 4634851 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E001B9F32F for ; Mon, 28 Jul 2014 14:05:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 49B5A20172 for ; Mon, 28 Jul 2014 14:05:24 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 96CF22015D for ; Mon, 28 Jul 2014 14:05:20 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XBlWC-0005eq-HY; Mon, 28 Jul 2014 14:03:12 +0000 Received: from mail-pa0-f48.google.com ([209.85.220.48]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XBlUe-0003kB-3n for linux-arm-kernel@lists.infradead.org; Mon, 28 Jul 2014 14:01:37 +0000 Received: by mail-pa0-f48.google.com with SMTP id et14so10544468pad.21 for ; Mon, 28 Jul 2014 07:01:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=xhR89XuJFfgBhu2yFx+MjHNughxcdNonor/zIHm4dwo=; b=a8nvV8jtYqZcKq2BXdqsml4mxr33hzDLh6XhKRwkW2VG7m0H607kXjGTSjz56mxHPr 4AuefCMMOrBo8MPPkk31LQ8+H9Rjm9Io9mwUlLDaqwfuJcIZDdhoLW5waAK3CFxJGoIc UHTaGBXkm2hkz3RH7xrfGUAc2zSMMnfZGlox9Dabj7P8tR6bUZIwtY+LGYcl7vWC7NoB jaaY1lzWhI6uHXF+hSrcuZUZBSfxglivp5kAVSaAJzTCmjxe+LUJ8KIRjtZCRL9i//DI y4zii14hPpfMbCnrf4QyLoKgapvdTx1WyE8uKOy42hSijTVR1IbIY4k78PzEU2Da4D8b 6gMg== X-Gm-Message-State: ALoCoQlgUR2ZhkB9PJZvFxKT8A1pb5s2KtS0PluuBj2cgP2ujNWB9dvR04NMhx626vQoIiXRk8OZ X-Received: by 10.68.173.65 with SMTP id bi1mr4192787pbc.130.1406556075590; Mon, 28 Jul 2014 07:01:15 -0700 (PDT) Received: from localhost.localdomain ([98.126.25.139]) by mx.google.com with ESMTPSA id tu10sm17773684pbc.43.2014.07.28.07.01.10 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 28 Jul 2014 07:01:14 -0700 (PDT) From: Haojian Zhuang To: marc.zyngier@arm.com, jason@lakedaemon.net, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, nicolas.pitre@linaro.org, khilman@linaro.org, xuwei5@hisilicon.com, arm@kernel.org, olof@lixom.net, liguozhu@hisilicon.com Subject: [PATCH v15 11/12] virt: arm: support hip04 gic Date: Mon, 28 Jul 2014 21:57:55 +0800 Message-Id: <1406555876-11989-12-git-send-email-haojian.zhuang@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1406555876-11989-1-git-send-email-haojian.zhuang@linaro.org> References: <1406555876-11989-1-git-send-email-haojian.zhuang@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140728_070136_209304_AB0C9BAB X-CRM114-Status: GOOD ( 21.64 ) X-Spam-Score: -1.4 (-) Cc: Haojian Zhuang X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,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 ARM standard GIC, GICH_APR offset is 0xf0 & GICH_LR0 offset is 0x100. In HiP04 GIC, GICH_APR offset is 0x70 & GICH_LR0 offset is 0x80. Now reuse the nr_lr field in struct vgic_cpu. Bit[31:16] is used to store GICH_APR offset in HiP04, and bit[15:0] is used to store real nr_lr variable. In ARM standard GIC, don't set bit[31:16]. So we could avoid to change the VGIC implementation in arm64. Signed-off-by: Haojian Zhuang --- arch/arm/kernel/asm-offsets.c | 2 +- arch/arm/kvm/interrupts_head.S | 29 +++++++++++++++++++++++------ arch/arm64/kernel/asm-offsets.c | 2 +- arch/arm64/kvm/hyp.S | 4 ++-- include/kvm/arm_vgic.h | 7 +++++-- include/linux/irqchip/arm-gic.h | 6 ++++++ virt/kvm/arm/vgic.c | 37 ++++++++++++++++++++++++++----------- 7 files changed, 64 insertions(+), 23 deletions(-) diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c index 85598b5..166cc98 100644 --- a/arch/arm/kernel/asm-offsets.c +++ b/arch/arm/kernel/asm-offsets.c @@ -189,7 +189,7 @@ int main(void) DEFINE(VGIC_CPU_ELRSR, offsetof(struct vgic_cpu, vgic_elrsr)); DEFINE(VGIC_CPU_APR, offsetof(struct vgic_cpu, vgic_apr)); DEFINE(VGIC_CPU_LR, offsetof(struct vgic_cpu, vgic_lr)); - DEFINE(VGIC_CPU_NR_LR, offsetof(struct vgic_cpu, nr_lr)); + DEFINE(VGIC_CPU_HW_CFG, offsetof(struct vgic_cpu, hw_cfg)); #ifdef CONFIG_KVM_ARM_TIMER DEFINE(VCPU_TIMER_CNTV_CTL, offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_ctl)); DEFINE(VCPU_TIMER_CNTV_CVAL, offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_cval)); diff --git a/arch/arm/kvm/interrupts_head.S b/arch/arm/kvm/interrupts_head.S index 76af9302..9fbbf99 100644 --- a/arch/arm/kvm/interrupts_head.S +++ b/arch/arm/kvm/interrupts_head.S @@ -419,7 +419,9 @@ vcpu .req r0 @ vcpu pointer always in r0 ldr r7, [r2, #GICH_EISR1] ldr r8, [r2, #GICH_ELRSR0] ldr r9, [r2, #GICH_ELRSR1] - ldr r10, [r2, #GICH_APR] + ldr r10, [r11, #VGIC_CPU_HW_CFG] + mov r10, r10, lsr #HWCFG_APR_SHIFT + ldr r10, [r2, r10] str r3, [r11, #VGIC_CPU_HCR] str r4, [r11, #VGIC_CPU_VMCR] @@ -435,9 +437,15 @@ vcpu .req r0 @ vcpu pointer always in r0 str r5, [r2, #GICH_HCR] /* Save list registers */ - add r2, r2, #GICH_LR0 + ldr r4, [r11, #VGIC_CPU_HW_CFG] + mov r10, r4, lsr #HWCFG_APR_SHIFT + /* the offset between GICH_APR & GICH_LR0 is 0x10 */ + add r10, r10, #0x10 + add r2, r2, r10 add r3, r11, #VGIC_CPU_LR - ldr r4, [r11, #VGIC_CPU_NR_LR] + /* Get NR_LR from VGIC_CPU_HW_CFG */ + ldr r6, =HWCFG_NR_LR_MASK + and r4, r4, r6 1: ldr r6, [r2], #4 str r6, [r3], #4 subs r4, r4, #1 @@ -469,12 +477,21 @@ vcpu .req r0 @ vcpu pointer always in r0 str r3, [r2, #GICH_HCR] str r4, [r2, #GICH_VMCR] - str r8, [r2, #GICH_APR] + ldr r6, [r11, #VGIC_CPU_HW_CFG] + mov r6, r6, lsr #HWCFG_APR_SHIFT + str r8, [r2, r6] /* Restore list registers */ - add r2, r2, #GICH_LR0 + ldr r4, [r11, #VGIC_CPU_HW_CFG] + mov r6, r4, lsr #HWCFG_APR_SHIFT + /* the offset between GICH_APR & GICH_LR0 is 0x10 */ + add r6, r6, #0x10 + /* get offset of GICH_LR0 */ + add r2, r2, r6 + /* Get NR_LR from VGIC_CPU_HW_CFG */ add r3, r11, #VGIC_CPU_LR - ldr r4, [r11, #VGIC_CPU_NR_LR] + ldr r6, =HWCFG_NR_LR_MASK + and r4, r4, r6 1: ldr r6, [r3], #4 str r6, [r2], #4 subs r4, r4, #1 diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 646f888..2422358 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -136,7 +136,7 @@ int main(void) DEFINE(VGIC_CPU_ELRSR, offsetof(struct vgic_cpu, vgic_elrsr)); DEFINE(VGIC_CPU_APR, offsetof(struct vgic_cpu, vgic_apr)); DEFINE(VGIC_CPU_LR, offsetof(struct vgic_cpu, vgic_lr)); - DEFINE(VGIC_CPU_NR_LR, offsetof(struct vgic_cpu, nr_lr)); + DEFINE(VGIC_CPU_HW_CFG, offsetof(struct vgic_cpu, hw_cfg)); DEFINE(KVM_VTTBR, offsetof(struct kvm, arch.vttbr)); DEFINE(KVM_VGIC_VCTRL, offsetof(struct kvm, arch.vgic.vctrl_base)); #endif diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S index b0d1512..2dbe337 100644 --- a/arch/arm64/kvm/hyp.S +++ b/arch/arm64/kvm/hyp.S @@ -426,7 +426,7 @@ CPU_BE( rev w11, w11 ) /* Save list registers */ add x2, x2, #GICH_LR0 - ldr w4, [x3, #VGIC_CPU_NR_LR] + ldr w4, [x3, #VGIC_CPU_HW_CFG] add x3, x3, #VGIC_CPU_LR 1: ldr w5, [x2], #4 CPU_BE( rev w5, w5 ) @@ -465,7 +465,7 @@ CPU_BE( rev w6, w6 ) /* Restore list registers */ add x2, x2, #GICH_LR0 - ldr w4, [x3, #VGIC_CPU_NR_LR] + ldr w4, [x3, #VGIC_CPU_HW_CFG] add x3, x3, #VGIC_CPU_LR 1: ldr w5, [x3], #4 CPU_BE( rev w5, w5 ) diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index f27000f..eba4b51 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -122,8 +122,11 @@ struct vgic_cpu { /* Bitmap of used/free list registers */ DECLARE_BITMAP( lr_used, VGIC_MAX_LRS); - /* Number of list registers on this CPU */ - int nr_lr; + /* + * bit[31:16]: GICH_APR offset + * bit[15:0]: Number of list registers on this CPU + */ + u32 hw_cfg; /* CPU vif control registers for world switch */ u32 vgic_hcr; diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h index 45e2d8c..b055f92 100644 --- a/include/linux/irqchip/arm-gic.h +++ b/include/linux/irqchip/arm-gic.h @@ -49,6 +49,8 @@ #define GICH_ELRSR1 0x34 #define GICH_APR 0xf0 #define GICH_LR0 0x100 +#define HIP04_GICH_APR 0x70 +/* GICH_LR0 offset in HiP04 is 0x80 */ #define GICH_HCR_EN (1 << 0) #define GICH_HCR_UIE (1 << 1) @@ -73,6 +75,10 @@ #define GICH_MISR_EOI (1 << 0) #define GICH_MISR_U (1 << 1) +#define HWCFG_NR_LR_MASK 0xffff +#define HWCFG_APR_SHIFT 16 +#define HWCFG_APR_MASK (0xffff << HWCFG_APR_SHIFT) + #ifndef __ASSEMBLY__ struct device_node; diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 56ff9be..6c0ee89 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -97,7 +97,7 @@ static void vgic_retire_disabled_irqs(struct kvm_vcpu *vcpu); static void vgic_update_state(struct kvm *kvm); static void vgic_kick_vcpus(struct kvm *kvm); static void vgic_dispatch_sgi(struct kvm_vcpu *vcpu, u32 reg); -static u32 vgic_nr_lr; +static u32 vgic_hw_cfg, vgic_nr_lr; static unsigned int vgic_maint_irq; @@ -625,7 +625,7 @@ static void vgic_unqueue_irqs(struct kvm_vcpu *vcpu) int i, irq, source_cpu; u32 *lr; - for_each_set_bit(i, vgic_cpu->lr_used, vgic_cpu->nr_lr) { + for_each_set_bit(i, vgic_cpu->lr_used, vgic_nr_lr) { lr = &vgic_cpu->vgic_lr[i]; irq = LR_IRQID(*lr); source_cpu = LR_CPUID(*lr); @@ -1006,7 +1006,7 @@ static void vgic_retire_disabled_irqs(struct kvm_vcpu *vcpu) struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; int lr; - for_each_set_bit(lr, vgic_cpu->lr_used, vgic_cpu->nr_lr) { + for_each_set_bit(lr, vgic_cpu->lr_used, vgic_nr_lr) { int irq = vgic_cpu->vgic_lr[lr] & GICH_LR_VIRTUALID; if (!vgic_irq_is_enabled(vcpu, irq)) { @@ -1047,8 +1047,8 @@ static bool vgic_queue_irq(struct kvm_vcpu *vcpu, u8 sgi_source_id, int irq) /* Try to use another LR for this interrupt */ lr = find_first_zero_bit((unsigned long *)vgic_cpu->lr_used, - vgic_cpu->nr_lr); - if (lr >= vgic_cpu->nr_lr) + vgic_nr_lr); + if (lr >= vgic_nr_lr) return false; kvm_debug("LR%d allocated for IRQ%d %x\n", lr, irq, sgi_source_id); @@ -1183,7 +1183,7 @@ static bool vgic_process_maintenance(struct kvm_vcpu *vcpu) int lr, irq; for_each_set_bit(lr, (unsigned long *)vgic_cpu->vgic_eisr, - vgic_cpu->nr_lr) { + vgic_nr_lr) { irq = vgic_cpu->vgic_lr[lr] & GICH_LR_VIRTUALID; vgic_irq_clear_active(vcpu, irq); @@ -1227,7 +1227,7 @@ static void __kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) /* Clear mappings for empty LRs */ for_each_set_bit(lr, (unsigned long *)vgic_cpu->vgic_elrsr, - vgic_cpu->nr_lr) { + vgic_nr_lr) { int irq; if (!test_and_clear_bit(lr, vgic_cpu->lr_used)) @@ -1241,8 +1241,8 @@ static void __kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) /* Check if we still have something up our sleeve... */ pending = find_first_zero_bit((unsigned long *)vgic_cpu->vgic_elrsr, - vgic_cpu->nr_lr); - if (level_pending || pending < vgic_cpu->nr_lr) + vgic_nr_lr); + if (level_pending || pending < vgic_nr_lr) set_bit(vcpu->vcpu_id, &dist->irq_pending_on_cpu); } @@ -1438,7 +1438,7 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu) */ vgic_cpu->vgic_vmcr = 0; - vgic_cpu->nr_lr = vgic_nr_lr; + vgic_cpu->hw_cfg = vgic_hw_cfg; vgic_cpu->vgic_hcr = GICH_HCR_EN; /* Get the show on the road... */ return 0; @@ -1470,17 +1470,31 @@ static struct notifier_block vgic_cpu_nb = { .notifier_call = vgic_cpu_notify, }; +static const struct of_device_id of_vgic_ids[] = { + { + .compatible = "arm,cortex-a15-gic", + .data = (void *)GICH_APR, + }, { + .compatible = "hisilicon,hip04-gic", + .data = (void *)HIP04_GICH_APR, + }, { + }, +}; + int kvm_vgic_hyp_init(void) { int ret; struct resource vctrl_res; struct resource vcpu_res; + const struct of_device_id *match; - vgic_node = of_find_compatible_node(NULL, NULL, "arm,cortex-a15-gic"); + vgic_node = of_find_matching_node_and_match(NULL, of_vgic_ids, &match); if (!vgic_node) { kvm_err("error: no compatible vgic node in DT\n"); return -ENODEV; } + /* High word of vgic_hw_cfg is the offset of GICH_APR. */ + vgic_hw_cfg = (unsigned long)match->data << HWCFG_APR_SHIFT; vgic_maint_irq = irq_of_parse_and_map(vgic_node, 0); if (!vgic_maint_irq) { @@ -1517,6 +1531,7 @@ int kvm_vgic_hyp_init(void) vgic_nr_lr = readl_relaxed(vgic_vctrl_base + GICH_VTR); vgic_nr_lr = (vgic_nr_lr & 0x3f) + 1; + vgic_hw_cfg |= vgic_nr_lr; ret = create_hyp_io_mappings(vgic_vctrl_base, vgic_vctrl_base + resource_size(&vctrl_res),