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 09/25] iommu, x86: define irq_remapping_cap()
Date: Wed, 3 Dec 2014 15:39:38 +0800 [thread overview]
Message-ID: <1417592394-24343-10-git-send-email-feng.wu@intel.com> (raw)
In-Reply-To: <1417592394-24343-1-git-send-email-feng.wu@intel.com>
This patch adds a new interface irq_remapping_cap() to detect
whether irq remapping supports new features, such as VT-d
Posted-Interrupts. We export this function out, so that KVM
code can check this and use this mechanism properly.
Signed-off-by: Feng Wu <feng.wu@intel.com>
Reviewed-by: Jiang Liu <jiang.liu@linux.intel.com>
---
arch/x86/include/asm/irq_remapping.h | 2 ++
drivers/iommu/irq_remapping.c | 12 ++++++++++++
2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index f87ac70..b3ad067 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -37,6 +37,7 @@ enum irq_remap_cap {
extern void setup_irq_remapping_ops(void);
extern int irq_remapping_supported(void);
+extern bool irq_remapping_cap(enum irq_remap_cap cap);
extern void set_irq_remapping_broken(void);
extern int irq_remapping_prepare(void);
extern int irq_remapping_enable(void);
@@ -69,6 +70,7 @@ struct vcpu_data {
static inline void setup_irq_remapping_ops(void) { }
static inline int irq_remapping_supported(void) { return 0; }
+static bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
static inline void set_irq_remapping_broken(void) { }
static inline int irq_remapping_prepare(void) { return -ENODEV; }
static inline int irq_remapping_enable(void) { return -ENODEV; }
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index e63e969..b008663 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -103,6 +103,18 @@ int irq_remapping_supported(void)
return remap_ops->supported();
}
+bool irq_remapping_cap(enum irq_remap_cap cap)
+{
+ if (disable_irq_post)
+ return 0;
+
+ if (!remap_ops || !remap_ops->capability)
+ return 0;
+
+ return remap_ops->capability(cap);
+}
+EXPORT_SYMBOL_GPL(irq_remapping_cap);
+
int __init irq_remapping_prepare(void)
{
if (!remap_ops || !remap_ops->prepare)
--
1.7.1
next prev parent reply other threads:[~2014-12-03 7:55 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 ` [v2 08/25] iommu, x86: Add intel_irq_remapping_capability() for Intel Feng Wu
2014-12-03 7:39 ` Feng Wu [this message]
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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