linux-kernel - [PATCH RESEND v2 12/17] KVM: selftests: Sync uapi/linux/kvm.h to tools/

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Date:   Fri, 20 Dec 2019 21:04:40 -0500
From:   Peter Xu <peterx@...hat.com>
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Dr David Alan Gilbert <dgilbert@...hat.com>,
        Christophe de Dinechin <dinechin@...hat.com>,
        peterx@...hat.com,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: [PATCH RESEND v2 12/17] KVM: selftests: Sync uapi/linux/kvm.h to tools/

This will be needed to extend the kvm selftest program.

Signed-off-by: Peter Xu <peterx@...hat.com>
---
 tools/include/uapi/linux/kvm.h | 36 ++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h
index 52641d8ca9e8..17df0de21cce 100644
--- a/tools/include/uapi/linux/kvm.h
+++ b/tools/include/uapi/linux/kvm.h
@@ -235,6 +235,7 @@ struct kvm_hyperv_exit {
 #define KVM_EXIT_S390_STSI        25
 #define KVM_EXIT_IOAPIC_EOI       26
 #define KVM_EXIT_HYPERV           27
+#define KVM_EXIT_DIRTY_RING_FULL  28
 
 /* For KVM_EXIT_INTERNAL_ERROR */
 /* Emulate instruction failed. */
@@ -246,6 +247,11 @@ struct kvm_hyperv_exit {
 /* Encounter unexpected vm-exit reason */
 #define KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON	4
 
+struct kvm_dirty_ring_indices {
+	__u32 avail_index; /* set by kernel */
+	__u32 fetch_index; /* set by userspace */
+};
+
 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
 struct kvm_run {
 	/* in */
@@ -415,6 +421,13 @@ struct kvm_run {
 		struct kvm_sync_regs regs;
 		char padding[SYNC_REGS_SIZE_BYTES];
 	} s;
+
+	struct kvm_dirty_ring_indices vcpu_ring_indices;
+};
+
+/* Returned by mmap(kvm->fd, offset=0) */
+struct kvm_vm_run {
+	struct kvm_dirty_ring_indices vm_ring_indices;
 };
 
 /* for KVM_REGISTER_COALESCED_MMIO / KVM_UNREGISTER_COALESCED_MMIO */
@@ -1000,6 +1013,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_PMU_EVENT_FILTER 173
 #define KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 174
 #define KVM_CAP_HYPERV_DIRECT_TLBFLUSH 175
+#define KVM_CAP_DIRTY_LOG_RING 176
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
@@ -1461,6 +1475,9 @@ struct kvm_enc_region {
 /* Available with KVM_CAP_ARM_SVE */
 #define KVM_ARM_VCPU_FINALIZE	  _IOW(KVMIO,  0xc2, int)
 
+/* Available with KVM_CAP_DIRTY_LOG_RING */
+#define KVM_RESET_DIRTY_RINGS     _IO(KVMIO, 0xc3)
+
 /* Secure Encrypted Virtualization command */
 enum sev_cmd_id {
 	/* Guest initialization commands */
@@ -1611,4 +1628,23 @@ struct kvm_hyperv_eventfd {
 #define KVM_HYPERV_CONN_ID_MASK		0x00ffffff
 #define KVM_HYPERV_EVENTFD_DEASSIGN	(1 << 0)
 
+/*
+ * The following are the requirements for supporting dirty log ring
+ * (by enabling KVM_DIRTY_LOG_PAGE_OFFSET).
+ *
+ * 1. Memory accesses by KVM should call kvm_vcpu_write_* instead
+ *    of kvm_write_* so that the global dirty ring is not filled up
+ *    too quickly.
+ * 2. kvm_arch_mmu_enable_log_dirty_pt_masked should be defined for
+ *    enabling dirty logging.
+ * 3. There should not be a separate step to synchronize hardware
+ *    dirty bitmap with KVM's.
+ */
+
+struct kvm_dirty_gfn {
+	__u32 pad;
+	__u32 slot;
+	__u64 offset;
+};
+
 #endif /* __LINUX_KVM_H */
-- 
2.24.1