From: Eric Auger <eric.auger@linaro.org>
To: eric.auger@st.com, eric.auger@linaro.org,
alex.williamson@redhat.com, feng.wu@intel.com,
pbonzini@redhat.com, linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: avi.kivity@gmail.com, mtosatti@redhat.com, joro@8bytes.org,
marc.zyngier@arm.com, christoffer.dall@linaro.org,
linux-kernel@vger.kernel.org, patches@linaro.org
Subject: [PATCH v4 4/5] KVM: introduce kvm_arch functions for IRQ bypass
Date: Mon, 3 Aug 2015 19:20:43 +0200 [thread overview]
Message-ID: <1438622444-25444-5-git-send-email-eric.auger@linaro.org> (raw)
In-Reply-To: <1438622444-25444-1-git-send-email-eric.auger@linaro.org>
This patch introduces
- kvm_arch_irq_bypass_add_producer
- kvm_arch_irq_bypass_del_producer
- kvm_arch_irq_bypass_stop
- kvm_arch_irq_bypass_start
They make possible to specialize the KVM IRQ bypass consumer in
case CONFIG_KVM_HAVE_IRQ_BYPASS is set.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Feng Wu <feng.wu@intel.com>
---
v2 -> v3 (Feng Wu):
- use 'kvm_arch_irq_bypass_start' instead of 'kvm_arch_irq_bypass_resume'
- Remove 'kvm_arch_irq_bypass_update', which is not needed to be
a irqbypass callback per Alex's comments.
- Make kvm_arch_irq_bypass_add_producer return 'int'
v1 -> v2:
- use CONFIG_KVM_HAVE_IRQ_BYPASS instead CONFIG_IRQ_BYPASS_MANAGER
- rename all functions according to Paolo's proposal
- add kvm_arch_irq_bypass_update according to Feng's need
---
include/linux/kvm_host.h | 33 +++++++++++++++++++++++++++++++++
virt/kvm/Kconfig | 3 +++
2 files changed, 36 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 05e99b8..84b5feb 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -24,6 +24,7 @@
#include <linux/err.h>
#include <linux/irqflags.h>
#include <linux/context_tracking.h>
+#include <linux/irqbypass.h>
#include <asm/signal.h>
#include <linux/kvm.h>
@@ -1151,5 +1152,37 @@ static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
{
}
#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
+
+#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
+
+int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
+ struct irq_bypass_producer *);
+void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
+ struct irq_bypass_producer *);
+void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
+void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
+
+#else
+
+static inline int kvm_arch_irq_bypass_add_producer(
+ struct irq_bypass_consumer *cons,
+ struct irq_bypass_producer *prod)
+{
+ return -1;
+}
+static inline void kvm_arch_irq_bypass_del_producer(
+ struct irq_bypass_consumer *cons,
+ struct irq_bypass_producer *prod)
+{
+}
+static inline void kvm_arch_irq_bypass_stop(
+ struct irq_bypass_consumer *cons)
+{
+}
+static inline void kvm_arch_irq_bypass_start(
+ struct irq_bypass_consumer *cons)
+{
+}
+#endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
#endif
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index e2c876d..9f8014d 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -47,3 +47,6 @@ config KVM_GENERIC_DIRTYLOG_READ_PROTECT
config KVM_COMPAT
def_bool y
depends on COMPAT && !S390
+
+config HAVE_KVM_IRQ_BYPASS
+ bool
--
1.9.1
next prev parent reply other threads:[~2015-08-03 17:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-03 17:20 [PATCH v4 0/5] KVM: irqfd consumer based on IRQ bypass manager Eric Auger
2015-08-03 17:20 ` [PATCH v4 1/5] KVM: x86: select IRQ_BYPASS_MANAGER Eric Auger
2015-08-03 17:20 ` [PATCH v4 2/5] KVM: arm/arm64: " Eric Auger
2015-08-03 17:20 ` [PATCH v4 3/5] KVM: create kvm_irqfd.h Eric Auger
2015-08-03 17:20 ` Eric Auger [this message]
2015-08-07 20:09 ` [PATCH v4 4/5] KVM: introduce kvm_arch functions for IRQ bypass Alex Williamson
2015-08-10 8:43 ` Eric Auger
2015-08-03 17:20 ` [PATCH v4 5/5] KVM: eventfd: add irq bypass consumer management Eric Auger
2015-08-07 20:09 ` Alex Williamson
2015-08-10 8:44 ` Eric Auger
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