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x86/kvm/hyper-v: Add support for synthetic debugger interface

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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 <vkuznets@redhat.com>
Signed-off-by: Jon Doron <arilou@gmail.com>
Message-Id: <20200529134543.1127440-4-arilou@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jon Doron 2020-05-29 16:45:40 +03:00 • committed by Paolo Bonzini
parent 22ad0026d0
commit f97f5a56f5
7 changed files with 258 additions and 3 deletions
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10
include/uapi/linux/kvm.h
View file

@ -188,6 +188,7 @@ struct kvm_s390_cmma_log {
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 {
@ -203,6 +204,15 @@ struct kvm_hyperv_exit {
__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;
};