From f97f5a56f5977311f3833056a73cdbb0ee56cb1e Mon Sep 17 00:00:00 2001 From: Jon Doron Date: Fri, 29 May 2020 16:45:40 +0300 Subject: x86/kvm/hyper-v: Add support for synthetic debugger interface Add support for Hyper-V synthetic debugger (syndbg) interface. The syndbg interface is using MSRs to emulate a way to send/recv packets data. The debug transport dll (kdvm/kdnet) will identify if Hyper-V is enabled and if it supports the synthetic debugger interface it will attempt to use it, instead of trying to initialize a network adapter. Reviewed-by: Vitaly Kuznetsov Signed-off-by: Jon Doron Message-Id: <20200529134543.1127440-4-arilou@gmail.com> Signed-off-by: Paolo Bonzini --- Documentation/virt/kvm/api.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'Documentation/virt') diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index db22e834ce2a..aad60be4884e 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -5070,6 +5070,7 @@ EOI was received. struct kvm_hyperv_exit { #define KVM_EXIT_HYPERV_SYNIC 1 #define KVM_EXIT_HYPERV_HCALL 2 + #define KVM_EXIT_HYPERV_SYNDBG 3 __u32 type; __u32 pad1; union { @@ -5085,6 +5086,15 @@ EOI was received. __u64 result; __u64 params[2]; } hcall; + struct { + __u32 msr; + __u32 pad2; + __u64 control; + __u64 status; + __u64 send_page; + __u64 recv_page; + __u64 pending_page; + } syndbg; } u; }; /* KVM_EXIT_HYPERV */ @@ -5101,6 +5111,12 @@ Hyper-V SynIC state change. Notification is used to remap SynIC event/message pages and to enable/disable SynIC messages/events processing in userspace. + - KVM_EXIT_HYPERV_SYNDBG -- synchronously notify user-space about + +Hyper-V Synthetic debugger state change. Notification is used to either update +the pending_page location or to send a control command (send the buffer located +in send_page or recv a buffer to recv_page). + :: /* KVM_EXIT_ARM_NISV */ -- cgit 1.4.1