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: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
kvm@vger.kernel.org, Feng Wu <feng.wu@intel.com>
Subject: [v2 08/25] iommu, x86: Add intel_irq_remapping_capability() for Intel
Date: Wed, 3 Dec 2014 15:39:37 +0800 [thread overview]
Message-ID: <1417592394-24343-9-git-send-email-feng.wu@intel.com> (raw)
In-Reply-To: <1417592394-24343-1-git-send-email-feng.wu@intel.com>
Add the Intel side implementation for capability in
struct irq_remap_ops.
Signed-off-by: Feng Wu <feng.wu@intel.com>
Reviewed-by: Jiang Liu <jiang.liu@linux.intel.com>
---
drivers/iommu/intel_irq_remapping.c | 27 +++++++++++++++++++++++++++
drivers/iommu/irq_remapping.c | 2 ++
drivers/iommu/irq_remapping.h | 4 ++++
3 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 01786a8..827aeff 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -651,6 +651,32 @@ error:
return -1;
}
+static bool intel_irq_remapping_capability(enum irq_remap_cap cap)
+{
+ struct dmar_drhd_unit *drhd;
+ struct intel_iommu *iommu;
+
+ switch (cap) {
+ case IRQ_POSTING_CAP:
+ /*
+ * If 1) posted-interrupts is disabled by user
+ * or 2) irq remapping is disabled, posted-interrupts
+ * is not supported.
+ */
+ if (disable_irq_post || !irq_remapping_enabled)
+ return 0;
+
+ for_each_iommu(iommu, drhd)
+ if (!cap_pi_support(iommu->cap))
+ return 0;
+
+ return 1;
+ default:
+ pr_warn("Unknown irq remapping capability.\n");
+ return 0;
+ }
+}
+
static int ir_parse_one_hpet_scope(struct acpi_dmar_device_scope *scope,
struct intel_iommu *iommu,
struct acpi_dmar_hardware_unit *drhd)
@@ -947,6 +973,7 @@ static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
struct irq_remap_ops intel_irq_remap_ops = {
.supported = intel_irq_remapping_supported,
+ .capability = intel_irq_remapping_capability,
.prepare = dmar_table_init,
.enable = intel_enable_irq_remapping,
.disable = disable_irq_remapping,
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 3c3da04..e63e969 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -24,6 +24,8 @@ int irq_remap_broken;
int disable_sourceid_checking;
int no_x2apic_optout;
+int disable_irq_post = 1;
+
static struct irq_remap_ops *remap_ops;
static void irq_remapping_disable_io_apic(void)
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 2d991b2..cb1f46d 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -36,6 +36,8 @@ extern int disable_sourceid_checking;
extern int no_x2apic_optout;
extern int irq_remapping_enabled;
+extern int disable_irq_post;
+
struct irq_remap_ops {
/* Check whether Interrupt Remapping is supported */
int (*supported)(void);
@@ -76,6 +78,8 @@ extern void ir_ack_apic_edge(struct irq_data *data);
#define disable_irq_remap 1
#define irq_remap_broken 0
+#define disable_irq_post 1
+
#endif /* CONFIG_IRQ_REMAP */
#endif /* __IRQ_REMAPPING_H */
--
1.7.1
next prev parent reply other threads:[~2014-12-03 7:50 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-03 7:39 [v2 00/25] Add VT-d Posted-Interrupts support Feng Wu
2014-12-03 7:39 ` [v2 01/25] genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a VCPU Feng Wu
2014-12-03 7:39 ` [v2 02/25] iommu: Add new member capability to struct irq_remap_ops Feng Wu
2014-12-03 7:39 ` [v2 03/25] iommu, x86: Define new irte structure for VT-d Posted-Interrupts Feng Wu
2014-12-03 7:39 ` [v2 04/25] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Feng Wu
2014-12-03 7:39 ` [v2 05/25] x86, irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller Feng Wu
2014-12-03 7:39 ` [v2 06/25] iommu, x86: No need to migrating irq for VT-d Posted-Interrupts Feng Wu
2014-12-03 7:39 ` [v2 07/25] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Feng Wu
2014-12-03 7:39 ` Feng Wu [this message]
2014-12-03 7:39 ` [v2 09/25] iommu, x86: define irq_remapping_cap() Feng Wu
2014-12-03 7:39 ` [v2 10/25] KVM: change struct pi_desc for VT-d Posted-Interrupts Feng Wu
2014-12-03 7:39 ` [v2 11/25] KVM: Add some helper functions for Posted-Interrupts Feng Wu
2014-12-03 7:39 ` [v2 12/25] KVM: Initialize VT-d Posted-Interrupts Descriptor Feng Wu
2014-12-03 7:39 ` [v2 13/25] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI Feng Wu
2014-12-03 7:39 ` [v2 14/25] KVM: Get Posted-Interrupts descriptor address from struct kvm_vcpu Feng Wu
2014-12-03 7:39 ` [v2 15/25] KVM: Make struct kvm_irq_routing_table accessible Feng Wu
2014-12-03 7:39 ` [v2 16/25] KVM: make kvm_set_msi_irq() public Feng Wu
2014-12-03 7:39 ` [v2 17/25] KVM: kvm-vfio: User API for VT-d Posted-Interrupts Feng Wu
2014-12-04 14:04 ` Eric Auger
2014-12-08 4:58 ` Wu, Feng
2014-12-08 5:21 ` Alex Williamson
2014-12-09 11:38 ` Wu, Feng
2014-12-11 5:55 ` Wu, Feng
2014-12-11 15:45 ` Alex Williamson
2014-12-03 7:39 ` [v2 18/25] KVM: kvm-vfio: implement the VFIO skeleton " Feng Wu
2014-12-04 15:35 ` Eric Auger
2014-12-08 4:58 ` Wu, Feng
2014-12-08 5:12 ` Alex Williamson
2014-12-08 10:15 ` Eric Auger
2014-12-09 11:51 ` Wu, Feng
2014-12-03 7:39 ` [v2 19/25] KVM: x86: kvm-vfio: VT-d posted-interrupts setup Feng Wu
2014-12-03 7:39 ` [v2 20/25] x86, irq: Define a global vector for VT-d Posted-Interrupts Feng Wu
2014-12-03 7:39 ` [v2 21/25] KVM: Update Posted-Interrupts descriptor during vCPU scheduling Feng Wu
2014-12-03 7:39 ` [v2 22/25] KVM: Change NDST field after " Feng Wu
2014-12-03 7:39 ` [v2 23/25] KVM: Add the handler for Wake-up Vector Feng Wu
2014-12-03 7:39 ` [v2 24/25] KVM: Suppress posted-interrupt when 'SN' is set Feng Wu
2014-12-03 7:39 ` [v2 25/25] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts Feng Wu
2014-12-08 13:36 ` [v2 00/25] Add VT-d Posted-Interrupts support Wu, Feng
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