Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933037AbbBBIOJ (ORCPT ); Mon, 2 Feb 2015 03:14:09 -0500 Received: from mga09.intel.com ([134.134.136.24]:3197 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932551AbbBBIOG (ORCPT ); Mon, 2 Feb 2015 03:14:06 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,505,1418112000"; d="scan'208";a="660196970" From: Feng Wu To: dwmw2@infradead.org, joro@8bytes.or Cc: jiang.liu@linux.intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Feng Wu Subject: [v4 3/8] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Date: Mon, 2 Feb 2015 16:01:49 +0800 Message-Id: <1422864114-19324-4-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1422864114-19324-1-git-send-email-feng.wu@intel.com> References: <1422864114-19324-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3014 Lines: 91 Implement irq_set_vcpu_affinity for intel_ir_chip. Signed-off-by: Feng Wu Reviewed-by: Jiang Liu Acked-by: David Woodhouse --- arch/x86/include/asm/irq_remapping.h | 5 ++++ drivers/iommu/intel_irq_remapping.c | 35 ++++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h index f67ae08..f87ac70 100644 --- a/arch/x86/include/asm/irq_remapping.h +++ b/arch/x86/include/asm/irq_remapping.h @@ -60,6 +60,11 @@ static inline struct irq_domain *arch_get_ir_parent_domain(void) return x86_vector_domain; } +struct vcpu_data { + u64 pi_desc_addr; /* Physical address of PI Descriptor */ + u32 vector; /* Guest vector of the interrupt */ +}; + #else /* CONFIG_IRQ_REMAP */ static inline void setup_irq_remapping_ops(void) { } diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index f6da3b2..48c2051 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -42,6 +42,7 @@ struct irq_2_iommu { struct intel_ir_data { struct irq_2_iommu irq_2_iommu; struct irte irte_entry; + struct irte_pi irte_pi_entry; union { struct msi_msg msi_entry; }; @@ -1010,10 +1011,44 @@ static void intel_ir_compose_msi_msg(struct irq_data *irq_data, *msg = ir_data->msi_entry; } +static int intel_ir_set_vcpu_affinity(struct irq_data *data, void *vcpu_info) +{ + struct intel_ir_data *ir_data = data->chip_data; + struct irte_pi *irte_pi = &ir_data->irte_pi_entry; + struct vcpu_data *vcpu_pi_info; + + /* stop posting interrupts, back to remapping mode */ + if (!vcpu_info) + modify_irte(&ir_data->irq_2_iommu, &ir_data->irte_entry); + else { + vcpu_pi_info = (struct vcpu_data *)vcpu_info; + memcpy(irte_pi, &ir_data->irte_entry, sizeof(struct irte)); + + irte_pi->urg = 0; + irte_pi->vector = vcpu_pi_info->vector; + irte_pi->pda_l = (vcpu_pi_info->pi_desc_addr >> + (32 - PDA_LOW_BIT)) & ~(-1UL << PDA_LOW_BIT); + irte_pi->pda_h = (vcpu_pi_info->pi_desc_addr >> 32) & + ~(-1UL << PDA_HIGH_BIT); + + irte_pi->__reserved_1 = 0; + irte_pi->__reserved_2 = 0; + irte_pi->__reserved_3 = 0; + irte_pi->__reserved_4 = 0; + + irte_pi->pst = 1; + + modify_irte(&ir_data->irq_2_iommu, (struct irte *)irte_pi); + } + + return 0; +} + static struct irq_chip intel_ir_chip = { .irq_ack = ir_ack_apic_edge, .irq_set_affinity = intel_ir_set_affinity, .irq_compose_msi_msg = intel_ir_compose_msi_msg, + .irq_set_vcpu_affinity = intel_ir_set_vcpu_affinity, }; static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data, -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/