All of lore.kernel.org
 help / color / mirror / Atom feed
From: Yunhong Jiang <yunhong.jiang@linux.intel.com>
To: kvm@vger.kernel.org
Cc: mtosatti@redhat.com, rkrcmar@redhat.com, pbonzini@redhat.com,
	kernellwp@gmail.com
Subject: [RFC PATCH V2 1/4] Add the kvm sched_out hook
Date: Tue, 24 May 2016 15:27:29 -0700	[thread overview]
Message-ID: <1464128852-14138-2-git-send-email-yunhong.jiang@linux.intel.com> (raw)
In-Reply-To: <1464128852-14138-1-git-send-email-yunhong.jiang@linux.intel.com>

From: Yunhong Jiang <yunhong.jiang@gmail.com>

When a vCPU thread is scheduled out, the sched_out hook will be invoked.

Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
---
 arch/arm/include/asm/kvm_host.h     | 1 +
 arch/mips/include/asm/kvm_host.h    | 1 +
 arch/powerpc/include/asm/kvm_host.h | 1 +
 arch/s390/include/asm/kvm_host.h    | 1 +
 arch/x86/include/asm/kvm_host.h     | 1 +
 arch/x86/kvm/x86.c                  | 4 ++++
 include/linux/kvm_host.h            | 1 +
 virt/kvm/kvm_main.c                 | 1 +
 8 files changed, 11 insertions(+)

diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 0df6b1fc9655..8ea4b8a1a27b 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -292,6 +292,7 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu, int cpu) {}
 
 static inline void kvm_arm_init_debug(void) {}
 static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index 6733ac575da4..6e432a3065e3 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -812,6 +812,7 @@ static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 		struct kvm_memory_slot *slot) {}
 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu, int cpu) {}
 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index ec35af34a3fb..2a0ebb0a78eb 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -725,6 +725,7 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
 static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu, int cpu) {}
 static inline void kvm_arch_exit(void) {}
 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 37b9017c6a96..69084b874837 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -688,6 +688,7 @@ static inline void kvm_arch_check_processor_compat(void *rtn) {}
 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu, int cpu) {}
 static inline void kvm_arch_free_memslot(struct kvm *kvm,
 		struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
 static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index e0fbe7e70dc1..5e6b3ce7748f 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -959,6 +959,7 @@ struct kvm_x86_ops {
 	int (*check_nested_events)(struct kvm_vcpu *vcpu, bool external_intr);
 
 	void (*sched_in)(struct kvm_vcpu *kvm, int cpu);
+	void (*sched_out)(struct kvm_vcpu *vcpu);
 
 	/*
 	 * Arch-specific dirty logging hooks. These hooks are only supposed to
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c805cf494154..269d576520ba 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7727,6 +7727,10 @@ void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
 	kvm_x86_ops->sched_in(vcpu, cpu);
 }
 
+void kvm_arch_sched_out(struct kvm_vcpu *vcpu)
+{
+}
+
 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 {
 	if (type)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index b1fa8f11c95b..04c48c50faf3 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -722,6 +722,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 
 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
+void kvm_arch_sched_out(struct kvm_vcpu *vcpu);
 
 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index dd4ac9d9e8f5..711edf7224b1 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3533,6 +3533,7 @@ static void kvm_sched_out(struct preempt_notifier *pn,
 
 	if (current->state == TASK_RUNNING)
 		vcpu->preempted = true;
+	kvm_arch_sched_out(vcpu);
 	kvm_arch_vcpu_put(vcpu);
 }
 
-- 
1.8.3.1


  reply	other threads:[~2016-05-24 22:35 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-24 22:27 [RFC PATCH V2 0/4] Utilizing VMX preemption for timer virtualization Yunhong Jiang
2016-05-24 22:27 ` Yunhong Jiang [this message]
2016-05-24 22:27 ` [RFC PATCH V2 2/4] Utilize the vmx preemption timer Yunhong Jiang
2016-06-14 13:23   ` Roman Kagan
2016-06-14 13:41     ` Paolo Bonzini
2016-06-14 16:46       ` yunhong jiang
2016-06-14 21:56         ` Paolo Bonzini
2016-06-15 18:03           ` yunhong jiang
2016-06-14 16:46     ` yunhong jiang
2016-05-24 22:27 ` [RFC PATCH V2 3/4] Separate the start_sw_tscdeadline Yunhong Jiang
2016-05-24 22:27 ` [RFC PATCH V2 4/4] Utilize the vmx preemption timer for tsc deadline timer Yunhong Jiang
2016-05-24 23:11   ` David Matlack
2016-05-24 23:35     ` yunhong jiang
2016-05-25 11:58       ` Paolo Bonzini
2016-05-25 22:53         ` yunhong jiang
2016-05-26  7:20           ` Paolo Bonzini
2016-05-25 10:40     ` Paolo Bonzini
2016-05-25 13:38       ` Radim Krčmář
2016-05-25 11:52   ` Paolo Bonzini
2016-05-25 22:44     ` yunhong jiang
2016-05-26 14:05       ` Alan Jenkins
2016-05-26 15:32         ` Paolo Bonzini
2016-06-04  0:24     ` yunhong jiang
2016-06-06 13:49       ` Paolo Bonzini
2016-06-06 18:21         ` yunhong jiang
2016-05-25 13:27   ` Radim Krčmář
2016-05-25 13:51     ` Paolo Bonzini
2016-05-25 14:31       ` Radim Krčmář
2016-05-25 23:13         ` yunhong jiang
2016-06-14 11:34         ` Paolo Bonzini
2016-05-25 13:45   ` Radim Krčmář
2016-05-25 22:57     ` yunhong jiang

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=1464128852-14138-2-git-send-email-yunhong.jiang@linux.intel.com \
    --to=yunhong.jiang@linux.intel.com \
    --cc=kernellwp@gmail.com \
    --cc=kvm@vger.kernel.org \
    --cc=mtosatti@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=rkrcmar@redhat.com \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.