From: eric.auger@linaro.org (Eric Auger)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC v5 08/13] KVM: kvm-vfio: wrappers for vfio_external_{mask|is_active|set_automasked}
Date: Thu, 19 Mar 2015 15:55:46 +0100 [thread overview]
Message-ID: <1426776951-24901-9-git-send-email-eric.auger@linaro.org> (raw)
In-Reply-To: <1426776951-24901-1-git-send-email-eric.auger@linaro.org>
Those 3 new wrapper functions call the respective VFIO external
functions.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
---
v4: creation
---
include/linux/vfio.h | 8 +++-----
virt/kvm/vfio.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+), 5 deletions(-)
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 7aa6330..78c1202 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -108,14 +108,12 @@ extern struct device *vfio_external_base_device(struct vfio_device *vdev);
struct vfio_platform_device;
extern void vfio_external_mask(struct vfio_platform_device *vdev, int index);
/*
- * returns whether the VFIO IRQ is active:
- * true if not yet deactivated at interrupt controller level or if
- * automasked (level sensitive IRQ). Unfortunately there is no way to
- * discriminate between handler auto-masking and user-space masking
+ * returns whether the VFIO IRQ is active at interrupt controller level
+ * or VFIO-masked. Note that if the use-space masked the IRQ index it
+ * cannot be discriminated from automasked handler situation.
*/
extern bool vfio_external_is_active(struct vfio_platform_device *vdev,
int index);
-
extern void vfio_external_set_automasked(struct vfio_platform_device *vdev,
int index, bool automasked);
diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c
index 80a45e4..c995e51 100644
--- a/virt/kvm/vfio.c
+++ b/virt/kvm/vfio.c
@@ -134,6 +134,50 @@ static void kvm_vfio_put_vfio_device(struct vfio_device *vdev)
kvm_vfio_device_put_external_user(vdev);
}
+bool kvm_vfio_external_is_active(struct vfio_platform_device *vpdev,
+ int index)
+{
+ bool (*fn)(struct vfio_platform_device *, int index);
+ bool active;
+
+ fn = symbol_get(vfio_external_is_active);
+ if (!fn)
+ return -1;
+
+ active = fn(vpdev, index);
+
+ symbol_put(vfio_external_is_active);
+ return active;
+}
+
+void kvm_vfio_external_mask(struct vfio_platform_device *vpdev,
+ int index)
+{
+ void (*fn)(struct vfio_platform_device *, int index);
+
+ fn = symbol_get(vfio_external_mask);
+ if (!fn)
+ return;
+
+ fn(vpdev, index);
+
+ symbol_put(vfio_external_mask);
+}
+
+void kvm_vfio_external_set_automasked(struct vfio_platform_device *vpdev,
+ int index, bool automasked)
+{
+ void (*fn)(struct vfio_platform_device *, int index, bool automasked);
+
+ fn = symbol_get(vfio_external_set_automasked);
+ if (!fn)
+ return;
+
+ fn(vpdev, index, automasked);
+
+ symbol_put(vfio_external_set_automasked);
+}
+
static bool kvm_vfio_group_is_coherent(struct vfio_group *vfio_group)
{
long (*fn)(struct vfio_group *, unsigned long);
--
1.9.1
next prev parent reply other threads:[~2015-03-19 14:55 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-19 14:55 [RFC v5 00/13] KVM-VFIO IRQ forward control Eric Auger
2015-03-19 14:55 ` [RFC v5 01/13] KVM: arm/arm64: Enable the KVM-VFIO device Eric Auger
2015-03-19 14:55 ` [RFC v5 02/13] VFIO: platform: test forwarded state when selecting IRQ handler Eric Auger
2015-03-19 14:55 ` [RFC v5 03/13] VFIO: platform: single handler using function pointer Eric Auger
2015-03-19 14:55 ` [RFC v5 04/13] KVM: kvm-vfio: User API for IRQ forwarding Eric Auger
2015-03-19 14:55 ` [RFC v5 05/13] VFIO: external user API for interaction with vfio devices Eric Auger
2015-03-19 14:55 ` [RFC v5 06/13] VFIO: platform: add vfio_external_{mask|is_active|set_automasked} Eric Auger
2015-03-31 17:20 ` Alex Williamson
2015-04-01 12:20 ` Eric Auger
2015-03-19 14:55 ` [RFC v5 07/13] KVM: kvm-vfio: wrappers to VFIO external API device helpers Eric Auger
2015-03-19 14:55 ` Eric Auger [this message]
2015-03-31 17:20 ` [RFC v5 08/13] KVM: kvm-vfio: wrappers for vfio_external_{mask|is_active|set_automasked} Alex Williamson
2015-03-19 14:55 ` [RFC v5 09/13] KVM: arm: rename pause into power_off Eric Auger
2015-03-19 14:55 ` [RFC v5 10/13] kvm: introduce kvm_arch_halt_guest and kvm_arch_resume_guest Eric Auger
2015-03-19 14:55 ` [RFC v5 11/13] kvm: arm/arm64: implement " Eric Auger
2015-03-19 14:55 ` [RFC v5 12/13] KVM: kvm-vfio: generic forwarding control Eric Auger
2015-03-31 17:20 ` Alex Williamson
2015-03-19 14:55 ` [RFC v5 13/13] KVM: arm/arm64: vgic: " Eric Auger
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