From: Shivam Kumar <shivam.kumar1@nutanix.com>
To: pbonzini@redhat.com
Cc: kvm@vger.kernel.org, Shivam Kumar <shivam.kumar1@nutanix.com>,
Anurag Madnawat <anurag.madnawat@nutanix.com>,
Shaju Abraham <shaju.abraham@nutanix.com>,
Manish Mishra <manish.mishra@nutanix.com>
Subject: [PATCH 1/6] Define data structures for dirty quota migration.
Date: Sun, 14 Nov 2021 14:57:16 +0000 [thread overview]
Message-ID: <20211114145721.209219-2-shivam.kumar1@nutanix.com> (raw)
In-Reply-To: <20211114145721.209219-1-shivam.kumar1@nutanix.com>
Define the data structures to be used on the KVM side:
vCPUDirtyQuotaContext: stores the dirty quota context for individual vCPUs
(shared between QEMU and KVM).
dirty_counter: number of pages dirtied by the vCPU
dirty_quota: limit on the number of pages the vCPU can dirty
dirty_quota_migration_enabled: flag to see if migration is on or off.
Co-developed-by: Anurag Madnawat <anurag.madnawat@nutanix.com>
Signed-off-by: Anurag Madnawat <anurag.madnawat@nutanix.com>
Signed-off-by: Shivam Kumar <shivam.kumar1@nutanix.com>
Signed-off-by: Shaju Abraham <shaju.abraham@nutanix.com>
Signed-off-by: Manish Mishra <manish.mishra@nutanix.com>
---
include/linux/dirty_quota_migration.h | 17 +++++++++++++++++
include/linux/kvm_host.h | 3 +++
2 files changed, 20 insertions(+)
create mode 100644 include/linux/dirty_quota_migration.h
diff --git a/include/linux/dirty_quota_migration.h b/include/linux/dirty_quota_migration.h
new file mode 100644
index 000000000000..4f4e0d80a04d
--- /dev/null
+++ b/include/linux/dirty_quota_migration.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef DIRTY_QUOTA_MIGRATION_H
+#define DIRTY_QUOTA_MIGRATION_H
+#include <linux/kvm.h>
+
+/**
+ * vCPUDirtyQuotaContext: dirty quota context of a vCPU
+ *
+ * @dirty_counter: number of pages dirtied by the vCPU
+ * @dirty_quota: limit on the number of pages the vCPU can dirty
+ */
+struct vCPUDirtyQuotaContext {
+ u64 dirty_counter;
+ u64 dirty_quota;
+};
+
+#endif /* DIRTY_QUOTA_MIGRATION_H */
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 9e0667e3723e..3cb6a43da01c 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -38,6 +38,7 @@
#include <asm/kvm_host.h>
#include <linux/kvm_dirty_ring.h>
+#include <linux/dirty_quota_migration.h>
#ifndef KVM_MAX_VCPU_IDS
#define KVM_MAX_VCPU_IDS KVM_MAX_VCPUS
@@ -360,6 +361,7 @@ struct kvm_vcpu {
* it is a valid slot.
*/
int last_used_slot;
+ struct vCPUDirtyQuotaContext *vCPUdqctx;
};
/* must be called with irqs disabled */
@@ -618,6 +620,7 @@ struct kvm {
u32 dirty_ring_size;
bool vm_bugged;
bool vm_dead;
+ bool dirty_quota_migration_enabled;
#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER
struct notifier_block pm_notifier;
--
2.22.3
next prev parent reply other threads:[~2021-11-14 14:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-14 14:57 [PATCH 0/6] KVM: Dirty Quota-Based VM Live Migration Auto-Converge Shivam Kumar
2021-11-14 14:57 ` Shivam Kumar [this message]
2021-11-14 14:57 ` [PATCH 2/6] Init dirty quota flag and allocate memory for vCPUdqctx Shivam Kumar
2021-11-14 14:57 ` [PATCH 3/6] Add KVM_CAP_DIRTY_QUOTA_MIGRATION and handle vCPU page faults Shivam Kumar
2021-11-18 17:57 ` Sean Christopherson
2021-11-19 20:03 ` Shivam Kumar
[not found] ` <02b8fa86-a86b-969e-2137-1953639cb6d2@nutanix.com>
[not found] ` <YZgD0D4536s2DMem@google.com>
2021-11-19 20:21 ` Shivam Kumar
2021-11-25 8:43 ` Shivam Kumar
2021-12-01 17:22 ` Sean Christopherson
2021-11-14 14:57 ` [PATCH 4/6] Increment dirty counter for vmexit due to page write fault Shivam Kumar
2021-11-18 17:48 ` Sean Christopherson
2021-11-19 19:54 ` Shivam Kumar
2021-11-14 14:57 ` [PATCH 5/6] Exit to userspace when dirty quota is full Shivam Kumar
2021-11-14 14:57 ` [PATCH 6/6] Free vCPUdqctx memory on vCPU destroy Shivam Kumar
2021-11-18 17:46 ` [PATCH 0/6] KVM: Dirty Quota-Based VM Live Migration Auto-Converge Sean Christopherson
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