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From: Peter Xu <peterx@redhat.com>
To: qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
	peterx@redhat.com
Subject: [PATCH RFC v3 01/11] linux-headers: Update
Date: Sat, 23 May 2020 19:20:25 -0400
Message-ID: <20200523232035.1029349-2-peterx@redhat.com> (raw)
In-Reply-To: <20200523232035.1029349-1-peterx@redhat.com>

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 linux-headers/asm-x86/kvm.h |  1 +
 linux-headers/linux/kvm.h   | 53 +++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/linux-headers/asm-x86/kvm.h b/linux-headers/asm-x86/kvm.h
index 3f3f780c8c..99b15ce39e 100644
--- a/linux-headers/asm-x86/kvm.h
+++ b/linux-headers/asm-x86/kvm.h
@@ -12,6 +12,7 @@
 
 #define KVM_PIO_PAGE_OFFSET 1
 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
+#define KVM_DIRTY_LOG_PAGE_OFFSET 64
 
 #define DE_VECTOR 0
 #define DB_VECTOR 1
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 9804495a46..f0f3cecce1 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -236,6 +236,7 @@ struct kvm_hyperv_exit {
 #define KVM_EXIT_IOAPIC_EOI       26
 #define KVM_EXIT_HYPERV           27
 #define KVM_EXIT_ARM_NISV         28
+#define KVM_EXIT_DIRTY_RING_FULL  29
 
 /* For KVM_EXIT_INTERNAL_ERROR */
 /* Emulate instruction failed. */
@@ -1017,6 +1018,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_S390_VCPU_RESETS 179
 #define KVM_CAP_S390_PROTECTED 180
 #define KVM_CAP_PPC_SECURE_GUEST 181
+#define KVM_CAP_DIRTY_LOG_RING 182
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
@@ -1518,6 +1520,9 @@ struct kvm_pv_cmd {
 /* Available with KVM_CAP_S390_PROTECTED */
 #define KVM_S390_PV_COMMAND		_IOWR(KVMIO, 0xc5, struct kvm_pv_cmd)
 
+/* Available with KVM_CAP_DIRTY_LOG_RING */
+#define KVM_RESET_DIRTY_RINGS		_IO(KVMIO, 0xc6)
+
 /* Secure Encrypted Virtualization command */
 enum sev_cmd_id {
 	/* Guest initialization commands */
@@ -1671,4 +1676,52 @@ struct kvm_hyperv_eventfd {
 #define KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE    (1 << 0)
 #define KVM_DIRTY_LOG_INITIALLY_SET            (1 << 1)
 
+/*
+ * Arch needs to define the macro after implementing the dirty ring
+ * feature.  KVM_DIRTY_LOG_PAGE_OFFSET should be defined as the
+ * starting page offset of the dirty ring structures.
+ */
+#ifndef KVM_DIRTY_LOG_PAGE_OFFSET
+#define KVM_DIRTY_LOG_PAGE_OFFSET 0
+#endif
+
+/*
+ * KVM dirty GFN flags, defined as:
+ *
+ * |---------------+---------------+--------------|
+ * | bit 1 (reset) | bit 0 (dirty) | Status       |
+ * |---------------+---------------+--------------|
+ * |             0 |             0 | Invalid GFN  |
+ * |             0 |             1 | Dirty GFN    |
+ * |             1 |             X | GFN to reset |
+ * |---------------+---------------+--------------|
+ *
+ * Lifecycle of a dirty GFN goes like:
+ *
+ *      dirtied         collected        reset
+ * 00 -----------> 01 -------------> 1X -------+
+ *  ^                                          |
+ *  |                                          |
+ *  +------------------------------------------+
+ *
+ * The userspace program is only responsible for the 01->1X state
+ * conversion (to collect dirty bits).  Also, it must not skip any
+ * dirty bits so that dirty bits are always collected in sequence.
+ */
+#define KVM_DIRTY_GFN_F_DIRTY           BIT(0)
+#define KVM_DIRTY_GFN_F_RESET           BIT(1)
+#define KVM_DIRTY_GFN_F_MASK            0x3
+
+/*
+ * KVM dirty rings should be mapped at KVM_DIRTY_LOG_PAGE_OFFSET of
+ * per-vcpu mmaped regions as an array of struct kvm_dirty_gfn.  The
+ * size of the gfn buffer is decided by the first argument when
+ * enabling KVM_CAP_DIRTY_LOG_RING.
+ */
+struct kvm_dirty_gfn {
+	__u32 flags;
+	__u32 slot;
+	__u64 offset;
+};
+
 #endif /* __LINUX_KVM_H */
-- 
2.26.2



  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-23 23:20 [PATCH RFC v3 00/11] KVM: Dirty ring support (QEMU part) Peter Xu
2020-05-23 23:20 ` Peter Xu [this message]
2020-05-24 13:27   ` [PATCH RFC v3 01/11] linux-headers: Update Peter Maydell
2020-05-24 14:06     ` Peter Xu
2020-05-24 17:50       ` Peter Maydell
2020-05-25 14:29         ` Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 02/11] memory: Introduce log_sync_global() to memory listener Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 03/11] KVM: Fixup kvm_log_clear_one_slot() ioctl return check Peter Xu
2020-05-24 16:39   ` Philippe Mathieu-Daudé
2020-05-23 23:20 ` [PATCH RFC v3 04/11] KVM: Use a big lock to replace per-kml slots_lock Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 05/11] KVM: Create the KVMSlot dirty bitmap on flag changes Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 06/11] KVM: Provide helper to get kvm dirty log Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 07/11] KVM: Provide helper to sync dirty bitmap from slot to ramblock Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 08/11] KVM: Simplify dirty log sync in kvm_set_phys_mem Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 09/11] KVM: Cache kvm slot dirty bitmap size Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 10/11] KVM: Add dirty-gfn-count property Peter Xu
2020-05-23 23:20 ` [PATCH RFC v3 11/11] KVM: Dirty ring support Peter Xu
2020-05-24 13:06 ` [PATCH RFC v3 00/11] KVM: Dirty ring support (QEMU part) Peter Xu
2020-05-26 14:17 ` Peter Xu

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