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From: Jon Doron <arilou@gmail.com>
To: kvm@vger.kernel.org, linux-hyperv@vger.kernel.org
Cc: vkuznets@redhat.com, pbonzini@redhat.com
Subject: Re: [PATCH v11 0/7] x86/kvm/hyper-v: add support for synthetic debugger
Date: Thu, 7 May 2020 06:01:41 +0300
Message-ID: <20200507030141.GF2862@jondnuc> (raw)
In-Reply-To: <20200424113746.3473563-1-arilou@gmail.com>

Paolo was this merged in or by any chance in the queue?

Thanks,
-- Jon.

On 24/04/2020, Jon Doron wrote:
>Add support for the synthetic debugger interface of hyper-v, the
>synthetic debugger has 2 modes.
>1. Use a set of MSRs to send/recv information (undocumented so it's not
>   going to the hyperv-tlfs.h)
>2. Use hypercalls
>
>The first mode is based the following MSRs:
>1. Control/Status MSRs which either asks for a send/recv .
>2. Send/Recv MSRs each holds GPA where the send/recv buffers are.
>3. Pending MSR, holds a GPA to a PAGE that simply has a boolean that
>   indicates if there is data pending to issue a recv VMEXIT.
>
>The first mode implementation is to simply exit to user-space when
>either the control MSR or the pending MSR are being set.
>Then it's up-to userspace to implement the rest of the logic of sending/recving.
>
>In the second mode instead of using MSRs KNet will simply issue
>Hypercalls with the information to send/recv, in this mode the data
>being transferred is UDP encapsulated, unlike in the previous mode in
>which you get just the data to send.
>
>The new hypercalls will exit to userspace which will be incharge of
>re-encapsulating if needed the UDP packets to be sent.
>
>There is an issue though in which KDNet does not respect the hypercall
>page and simply issues vmcall/vmmcall instructions depending on the cpu
>type expecting them to be handled as it a real hypercall was issued.
>
>It's important to note that part of this feature has been subject to be
>removed in future versions of Windows, which is why some of the
>defintions will not be present the the TLFS but in the kvm hyperv header
>instead.
>
>v11:
>Fixed all reviewed by and rebased on latest origin/master
>
>Jon Doron (6):
>  x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit
>  x86/kvm/hyper-v: Simplify addition for custom cpuid leafs
>  x86/hyper-v: Add synthetic debugger definitions
>  x86/kvm/hyper-v: Add support for synthetic debugger capability
>  x86/kvm/hyper-v: enable hypercalls without hypercall page with syndbg
>  x86/kvm/hyper-v: Add support for synthetic debugger via hypercalls
>
>Vitaly Kuznetsov (1):
>  KVM: selftests: update hyperv_cpuid with SynDBG tests
>
> Documentation/virt/kvm/api.rst                |  18 ++
> arch/x86/include/asm/hyperv-tlfs.h            |   6 +
> arch/x86/include/asm/kvm_host.h               |  14 +
> arch/x86/kvm/hyperv.c                         | 242 ++++++++++++++++--
> arch/x86/kvm/hyperv.h                         |  33 +++
> arch/x86/kvm/trace.h                          |  51 ++++
> arch/x86/kvm/x86.c                            |  13 +
> include/uapi/linux/kvm.h                      |  13 +
> .../selftests/kvm/x86_64/hyperv_cpuid.c       | 143 +++++++----
> 9 files changed, 468 insertions(+), 65 deletions(-)
>
>-- 
>2.24.1
>

  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-24 11:37 Jon Doron
2020-04-24 11:37 ` [PATCH v11 1/7] x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit Jon Doron
2020-05-13  8:42   ` Roman Kagan
2020-04-24 11:37 ` [PATCH v11 2/7] x86/kvm/hyper-v: Simplify addition for custom cpuid leafs Jon Doron
2020-05-13  9:24   ` Roman Kagan
2020-05-13 12:49     ` Jon Doron
2020-05-29 11:13       ` Paolo Bonzini
2020-04-24 11:37 ` [PATCH v11 3/7] x86/hyper-v: Add synthetic debugger definitions Jon Doron
2020-04-24 11:37 ` [PATCH v11 4/7] x86/kvm/hyper-v: Add support for synthetic debugger capability Jon Doron
2020-05-29 10:46   ` Paolo Bonzini
2020-05-29 12:08     ` Vitaly Kuznetsov
2020-05-29 12:17       ` Paolo Bonzini
2020-04-24 11:37 ` [PATCH v11 5/7] x86/kvm/hyper-v: enable hypercalls without hypercall page with syndbg Jon Doron
2020-05-13  9:57   ` Roman Kagan
2020-05-13 12:37     ` Jon Doron
2020-05-29 10:48   ` Paolo Bonzini
2020-04-24 11:37 ` [PATCH v11 6/7] x86/kvm/hyper-v: Add support for synthetic debugger via hypercalls Jon Doron
2020-05-12 15:33   ` Roman Kagan
2020-05-13 12:39     ` Jon Doron
2020-04-24 11:37 ` [PATCH v11 7/7] KVM: selftests: update hyperv_cpuid with SynDBG tests Jon Doron
2020-05-07  3:01 ` Jon Doron [this message]
2020-05-07  7:57   ` [PATCH v11 0/7] x86/kvm/hyper-v: add support for synthetic debugger Paolo Bonzini

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