linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Feng Wu <feng.wu@intel.com>
To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
	x86@kernel.org, gleb@kernel.org, pbonzini@redhat.com,
	dwmw2@infradead.org, joro@8bytes.org, alex.williamson@redhat.com,
	jiang.liu@linux.intel.com
Cc: eric.auger@linaro.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org, kvm@vger.kernel.org,
	Feng Wu <feng.wu@intel.com>
Subject: [v3 20/26] KVM: x86: kvm-vfio: VT-d posted-interrupts setup
Date: Fri, 12 Dec 2014 23:14:54 +0800	[thread overview]
Message-ID: <1418397300-10870-21-git-send-email-feng.wu@intel.com> (raw)
In-Reply-To: <1418397300-10870-1-git-send-email-feng.wu@intel.com>

This patch defines macro __KVM_HAVE_ARCH_KVM_VFIO_POST and
implement kvm_arch_vfio_update_pi_irte for x86 architecture.

Signed-off-by: Feng Wu <feng.wu@intel.com>
---
 arch/x86/include/asm/kvm_host.h |  2 ++
 arch/x86/kvm/Makefile           |  2 +-
 arch/x86/kvm/kvm_vfio_x86.c     | 77 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 arch/x86/kvm/kvm_vfio_x86.c

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index cd4b174..13e3e40 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -82,6 +82,8 @@ static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
 		(base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
 }
 
+#define __KVM_HAVE_ARCH_KVM_VFIO_POST
+
 #define SELECTOR_TI_MASK (1 << 2)
 #define SELECTOR_RPL_MASK 0x03
 
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 25d22b2..8809d58 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -14,7 +14,7 @@ kvm-$(CONFIG_KVM_DEVICE_ASSIGNMENT)	+= $(KVM)/assigned-dev.o $(KVM)/iommu.o
 kvm-$(CONFIG_KVM_ASYNC_PF)	+= $(KVM)/async_pf.o
 
 kvm-y			+= x86.o mmu.o emulate.o i8259.o irq.o lapic.o \
-			   i8254.o cpuid.o pmu.o
+			   i8254.o cpuid.o pmu.o kvm_vfio_x86.o
 kvm-intel-y		+= vmx.o
 kvm-amd-y		+= svm.o
 
diff --git a/arch/x86/kvm/kvm_vfio_x86.c b/arch/x86/kvm/kvm_vfio_x86.c
new file mode 100644
index 0000000..2ba618e
--- /dev/null
+++ b/arch/x86/kvm/kvm_vfio_x86.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2014 Intel Corporation.
+ * Authors: Feng Wu <feng.wu@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kvm_host.h>
+#include <asm/irq_remapping.h>
+
+/*
+ * kvm_arch_vfio_update_pi_irte - set IRTE for Posted-Interrupts
+ *
+ * @kvm: kvm
+ * @host_irq: host irq of the interrupt
+ * @guest_irq: gsi of the interrupt
+ * @set: set or unset PI
+ * returns 0 on success, < 0 on failure
+ */
+int kvm_arch_vfio_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
+				 uint32_t guest_irq, bool set)
+{
+	struct kvm_kernel_irq_routing_entry *e;
+	struct kvm_irq_routing_table *irq_rt;
+	struct kvm_lapic_irq irq;
+	struct kvm_vcpu *vcpu;
+	struct vcpu_data vcpu_info;
+	int idx, ret = -EINVAL;
+
+	idx = srcu_read_lock(&kvm->irq_srcu);
+	irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
+	BUG_ON(guest_irq >= irq_rt->nr_rt_entries);
+
+	hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) {
+		if (e->type != KVM_IRQ_ROUTING_MSI)
+			continue;
+		/*
+		 * VT-d PI cannot support posting multicast/broadcast
+		 * interrupts to a VCPU, we still use interrupt remapping
+		 * for these kind of interrupts.
+		 */
+
+		kvm_set_msi_irq(e, &irq);
+		if (!kvm_find_dest_vcpu(kvm, &irq, &vcpu))
+			continue;
+
+		vcpu_info.pi_desc_addr = kvm_x86_ops->get_pi_desc_addr(vcpu);
+		vcpu_info.vector = irq.vector;
+
+		if (set)
+			ret = irq_set_vcpu_affinity(host_irq, &vcpu_info);
+		else {
+			/* suppress notification event before unposting */
+			kvm_x86_ops->pi_set_sn(vcpu);
+			ret = irq_set_vcpu_affinity(host_irq, NULL);
+			kvm_x86_ops->pi_clear_sn(vcpu);
+		}
+
+		if (ret < 0) {
+			printk(KERN_INFO "%s: failed to update PI IRTE\n",
+					__func__);
+			goto out;
+		}
+	}
+
+	ret = 0;
+out:
+	srcu_read_unlock(&kvm->irq_srcu, idx);
+	return ret;
+}
-- 
1.9.1


  parent reply	other threads:[~2014-12-12 15:28 UTC|newest]

Thread overview: 140+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-12 15:14 [v3 00/26] Add VT-d Posted-Interrupts support Feng Wu
2014-12-12 15:14 ` [v3 01/26] genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a VCPU Feng Wu
2014-12-12 15:14 ` [v3 02/26] iommu: Add new member capability to struct irq_remap_ops Feng Wu
2015-01-28 15:22   ` David Woodhouse
2015-01-29  8:34     ` Wu, Feng
2014-12-12 15:14 ` [v3 03/26] iommu, x86: Define new irte structure for VT-d Posted-Interrupts Feng Wu
2015-01-28 15:26   ` David Woodhouse
2014-12-12 15:14 ` [v3 04/26] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Feng Wu
2015-01-28 15:26   ` David Woodhouse
2015-01-29  7:55     ` Wu, Feng
2014-12-12 15:14 ` [v3 05/26] x86, irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller Feng Wu
2014-12-12 15:14 ` [v3 06/26] iommu, x86: No need to migrating irq for VT-d Posted-Interrupts Feng Wu
2014-12-18 14:26   ` Zhang, Yang Z
2014-12-19  1:40     ` Wu, Feng
2014-12-19  1:46       ` Zhang, Yang Z
2014-12-19 11:59         ` Paolo Bonzini
2014-12-23  0:37           ` Zhang, Yang Z
2014-12-23  8:47             ` Paolo Bonzini
2014-12-23  9:07               ` Wu, Feng
2014-12-23  9:34                 ` Paolo Bonzini
2014-12-24  1:38                   ` Zhang, Yang Z
2014-12-24  2:12                     ` Jiang Liu
2014-12-24  2:32                       ` Zhang, Yang Z
2014-12-24  3:08                         ` Wu, Feng
2014-12-24  4:04                           ` Zhang, Yang Z
2014-12-24  4:54                         ` Jiang Liu
2015-01-28 15:29   ` David Woodhouse
2014-12-12 15:14 ` [v3 07/26] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Feng Wu
2015-01-28 15:32   ` David Woodhouse
2014-12-12 15:14 ` [v3 08/26] iommu, x86: Add intel_irq_remapping_capability() for Intel Feng Wu
2015-01-28 15:37   ` David Woodhouse
2015-01-29  8:57     ` Wu, Feng
2014-12-12 15:14 ` [v3 09/26] iommu, x86: define irq_remapping_cap() Feng Wu
2014-12-12 15:14 ` [v3 10/26] KVM: change struct pi_desc for VT-d Posted-Interrupts Feng Wu
2014-12-12 15:14 ` [v3 11/26] KVM: Add some helper functions for Posted-Interrupts Feng Wu
2014-12-12 15:14 ` [v3 12/26] KVM: Initialize VT-d Posted-Interrupts Descriptor Feng Wu
2014-12-18 15:19   ` Zhang, Yang Z
2014-12-12 15:14 ` [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI Feng Wu
2014-12-18 14:49   ` Zhang, Yang Z
2014-12-18 16:58     ` Paolo Bonzini
2014-12-19  1:13       ` Zhang, Yang Z
2014-12-19  1:30         ` Wu, Feng
2014-12-19  1:30       ` Wu, Feng
2014-12-19  1:47         ` Zhang, Yang Z
2014-12-19 11:59         ` Paolo Bonzini
2014-12-19 23:48           ` Wu, Feng
2014-12-20 13:16             ` Paolo Bonzini
2014-12-22  4:48               ` Wu, Feng
2014-12-22  9:27                 ` Paolo Bonzini
2014-12-22 11:04                   ` Wu, Feng
2014-12-22 11:06                     ` Paolo Bonzini
2014-12-22 11:17                       ` Wu, Feng
2014-12-22 11:23                         ` Paolo Bonzini
2014-12-22 14:13                           ` Yong Wang
2015-01-09 14:54   ` Radim Krčmář
2015-01-09 14:56     ` Paolo Bonzini
2015-01-09 15:12       ` Radim Krčmář
2015-01-09 15:18         ` Paolo Bonzini
2015-01-09 15:47           ` Radim Krčmář
2015-01-13  0:27       ` Wu, Feng
2015-01-13 16:17         ` Radim Kr?má?
2015-01-14  1:27           ` Wu, Feng
2015-01-14 13:02             ` Paolo Bonzini
2015-01-14 16:59             ` Radim Kr?má?
2015-01-20 21:04               ` Nadav Amit
2015-01-21 21:16                 ` Radim Kr?má?
2014-12-12 15:14 ` [v3 14/26] KVM: Get Posted-Interrupts descriptor address from struct kvm_vcpu Feng Wu
2014-12-12 15:14 ` [v3 15/26] KVM: add interfaces to control PI outside vmx Feng Wu
2014-12-12 15:14 ` [v3 16/26] KVM: Make struct kvm_irq_routing_table accessible Feng Wu
2014-12-17 16:17   ` Paolo Bonzini
2014-12-19  2:19     ` Wu, Feng
2014-12-19 11:59       ` Paolo Bonzini
2014-12-19 23:39         ` Wu, Feng
2014-12-12 15:14 ` [v3 17/26] KVM: make kvm_set_msi_irq() public Feng Wu
2014-12-17 17:32   ` Paolo Bonzini
2014-12-12 15:14 ` [v3 18/26] KVM: kvm-vfio: User API for VT-d Posted-Interrupts Feng Wu
2014-12-12 15:14 ` [v3 19/26] KVM: kvm-vfio: implement the VFIO skeleton " Feng Wu
2014-12-12 15:14 ` Feng Wu [this message]
2014-12-12 15:14 ` [v3 21/26] x86, irq: Define a global vector " Feng Wu
2014-12-18 14:54   ` Zhang, Yang Z
2014-12-19  0:52     ` Wu, Feng
2015-01-30 18:18   ` H. Peter Anvin
2015-02-02  1:06     ` Wu, Feng
2015-02-23 22:04   ` Marcelo Tosatti
2014-12-12 15:14 ` [v3 22/26] KVM: Define a wakeup worker thread for vCPU Feng Wu
2014-12-12 15:14 ` [v3 23/26] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted Feng Wu
2014-12-17 17:11   ` Paolo Bonzini
2014-12-18  3:15     ` Wu, Feng
2014-12-18  8:32       ` Paolo Bonzini
2014-12-19  2:09         ` Wu, Feng
2015-02-23 22:21   ` Marcelo Tosatti
2015-03-02  9:12     ` Wu, Feng
2014-12-12 15:14 ` [v3 24/26] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked Feng Wu
2014-12-17 17:09   ` Paolo Bonzini
2014-12-18  3:16     ` Wu, Feng
2014-12-18  8:37       ` Paolo Bonzini
2014-12-19  2:51         ` Wu, Feng
2015-02-25 21:50   ` Marcelo Tosatti
2015-02-26  8:08     ` Wu, Feng
2015-02-26 23:41       ` Marcelo Tosatti
2015-02-26 23:40   ` Marcelo Tosatti
2015-03-02 13:36     ` Wu, Feng
2015-03-04 12:06       ` Marcelo Tosatti
2015-03-06  6:51         ` Wu, Feng
2015-03-12  1:15           ` Marcelo Tosatti
2015-03-16 11:42             ` Wu, Feng
2015-03-25 23:17               ` Marcelo Tosatti
2015-03-27  6:34                 ` Wu, Feng
2015-03-27 19:30                   ` Marcelo Tosatti
2015-03-30  4:46                     ` Wu, Feng
2015-03-30 23:55                       ` Marcelo Tosatti
2015-03-31  1:13                         ` Wu, Feng
2015-04-14  7:37                         ` Wu, Feng
2015-06-05 21:59                           ` Marcelo Tosatti
2015-06-08  1:43                             ` Wu, Feng
2014-12-12 15:14 ` [v3 25/26] KVM: Suppress posted-interrupt when 'SN' is set Feng Wu
2014-12-17 17:42   ` Paolo Bonzini
2014-12-18  3:14     ` Wu, Feng
2014-12-18  8:38       ` Paolo Bonzini
2014-12-18 15:09         ` Zhang, Yang Z
2014-12-19  2:58           ` Wu, Feng
2014-12-19  3:32             ` Zhang, Yang Z
2014-12-19  4:34               ` Wu, Feng
2014-12-19  4:44                 ` Zhang, Yang Z
2014-12-19  4:49                   ` Wu, Feng
2014-12-19  5:25                     ` Zhang, Yang Z
2014-12-19  5:46                       ` Wu, Feng
2014-12-19  7:04                         ` Zhang, Yang Z
2014-12-19 12:00                       ` Paolo Bonzini
2014-12-19 23:34                         ` Wu, Feng
2014-12-12 15:15 ` [v3 26/26] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts Feng Wu
2015-01-28 15:39   ` David Woodhouse
2014-12-16  9:04 ` [v3 00/26] Add VT-d Posted-Interrupts support Wu, Feng
2015-01-06  1:10 ` Wu, Feng
2015-01-09 12:46   ` joro
2015-01-09 13:58     ` Wu, Feng
2015-01-21  2:25 ` Wu, Feng
2015-01-28  3:01   ` Wu, Feng
2015-01-28  3:44     ` Alex Williamson
2015-01-28  4:44       ` Wu, Feng

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1418397300-10870-21-git-send-email-feng.wu@intel.com \
    --to=feng.wu@intel.com \
    --cc=alex.williamson@redhat.com \
    --cc=dwmw2@infradead.org \
    --cc=eric.auger@linaro.org \
    --cc=gleb@kernel.org \
    --cc=hpa@zytor.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=jiang.liu@linux.intel.com \
    --cc=joro@8bytes.org \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).