From: "Huang, Kai" <kai.huang@intel.com>
To: "seanjc@google.com" <seanjc@google.com>,
"binbin.wu@linux.intel.com" <binbin.wu@linux.intel.com>
Cc: "Gao, Chao" <chao.gao@intel.com>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
"Li, Xiaoyao" <xiaoyao.li@intel.com>,
"Chatre, Reinette" <reinette.chatre@intel.com>,
"Hunter, Adrian" <adrian.hunter@intel.com>,
"tony.lindgren@linux.intel.com" <tony.lindgren@linux.intel.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"Yamahata, Isaku" <isaku.yamahata@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Zhao, Yan Y" <yan.y.zhao@intel.com>
Subject: Re: [PATCH 11/16] KVM: TDX: Always block INIT/SIPI
Date: Thu, 9 Jan 2025 02:46:51 +0000 [thread overview]
Message-ID: <de52a2dbdcf844483cbc7aef03ffde1d7bc030d9.camel@intel.com> (raw)
In-Reply-To: <8fccaab6-fda3-489c-866d-f0463ebbad65@linux.intel.com>
On Thu, 2025-01-09 at 10:26 +0800, Binbin Wu wrote:
> > > > I think we can just say TDX doesn't support vcpu reset no matter due to
> > > > INIT event or not.
> > That's not entirely accurate either though. TDX does support KVM's version of
> > RESET, because KVM's RESET is "power-on", i.e. vCPU creation. Emulation of
> > runtime RESET is userspace's responsibility.
> >
> > The real reason why KVM doesn't do anything during KVM's RESET is that what
> > little setup KVM does/can do needs to be defered until after guest CPUID is
> > configured.
> >
> > KVM should also WARN if a TDX vCPU gets INIT, no?
>
> There was a KVM_BUG_ON() if a TDX vCPU gets INIT in v19, and later it was
> removed during the cleanup about removing WARN_ON_ONCE() and KVM_BUG_ON().
>
> Since INIT/SIPI are always blocked for TDX guests, a delivery of INIT
> event is a KVM bug and a WARN_ON_ONCE() is appropriate for this case.
Can TDX guest issue INIT via IPI? Perhaps KVM_BUG_ON() is safer?
next prev parent reply other threads:[~2025-01-09 2:46 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-09 1:07 [PATCH 00/16] KVM: TDX: TDX interrupts Binbin Wu
2024-12-09 1:07 ` [PATCH 01/16] KVM: TDX: Add support for find pending IRQ in a protected local APIC Binbin Wu
2025-01-09 15:38 ` Nikolay Borisov
2025-01-10 5:36 ` Binbin Wu
2024-12-09 1:07 ` [PATCH 02/16] KVM: VMX: Remove use of struct vcpu_vmx from posted_intr.c Binbin Wu
2024-12-09 1:07 ` [PATCH 03/16] KVM: TDX: Disable PI wakeup for IPIv Binbin Wu
2024-12-09 1:07 ` [PATCH 04/16] KVM: VMX: Move posted interrupt delivery code to common header Binbin Wu
2024-12-09 1:07 ` [PATCH 05/16] KVM: TDX: Implement non-NMI interrupt injection Binbin Wu
2024-12-09 1:07 ` [PATCH 06/16] KVM: x86: Assume timer IRQ was injected if APIC state is protected Binbin Wu
2024-12-09 1:07 ` [PATCH 07/16] KVM: TDX: Wait lapic expire when timer IRQ was injected Binbin Wu
2024-12-09 1:07 ` [PATCH 08/16] KVM: TDX: Implement methods to inject NMI Binbin Wu
2024-12-09 1:07 ` [PATCH 09/16] KVM: TDX: Complete interrupts after TD exit Binbin Wu
2024-12-09 1:07 ` [PATCH 10/16] KVM: TDX: Handle SMI request as !CONFIG_KVM_SMM Binbin Wu
2024-12-09 1:07 ` [PATCH 11/16] KVM: TDX: Always block INIT/SIPI Binbin Wu
2025-01-08 7:21 ` Xiaoyao Li
2025-01-08 7:53 ` Binbin Wu
2025-01-08 14:40 ` Sean Christopherson
2025-01-09 2:09 ` Xiaoyao Li
2025-01-09 2:26 ` Binbin Wu
2025-01-09 2:46 ` Huang, Kai [this message]
2025-01-09 3:20 ` Binbin Wu
2025-01-09 4:01 ` Huang, Kai
2025-01-09 2:51 ` Huang, Kai
2024-12-09 1:07 ` [PATCH 12/16] KVM: TDX: Inhibit APICv for TDX guest Binbin Wu
2025-01-03 21:59 ` Vishal Annapurve
2025-01-06 1:46 ` Binbin Wu
2025-01-06 22:49 ` Vishal Annapurve
2025-01-06 23:40 ` Sean Christopherson
2025-01-07 3:24 ` Chao Gao
2025-01-07 8:09 ` Binbin Wu
2025-01-07 21:15 ` Sean Christopherson
2025-01-13 2:03 ` Binbin Wu
2025-01-13 2:09 ` Binbin Wu
2025-01-13 17:16 ` Sean Christopherson
2025-01-14 8:20 ` Binbin Wu
2025-01-14 16:59 ` Sean Christopherson
2025-01-16 11:55 ` Huang, Kai
2025-01-16 14:50 ` Sean Christopherson
2025-01-16 20:16 ` Huang, Kai
2025-01-16 22:37 ` Sean Christopherson
2025-01-17 9:53 ` Huang, Kai
2025-01-17 10:46 ` Huang, Kai
2025-01-17 15:08 ` Sean Christopherson
2025-01-17 0:49 ` Binbin Wu
2024-12-09 1:07 ` [PATCH 13/16] KVM: TDX: Add methods to ignore virtual apic related operation Binbin Wu
2025-01-03 22:04 ` Vishal Annapurve
2025-01-06 2:18 ` Binbin Wu
2025-01-22 11:34 ` Paolo Bonzini
2025-01-22 13:59 ` Binbin Wu
2024-12-09 1:07 ` [PATCH 14/16] KVM: VMX: Move NMI/exception handler to common helper Binbin Wu
2024-12-09 1:07 ` [PATCH 15/16] KVM: TDX: Handle EXCEPTION_NMI and EXTERNAL_INTERRUPT Binbin Wu
2024-12-09 1:07 ` [PATCH 16/16] KVM: TDX: Handle EXIT_REASON_OTHER_SMI Binbin Wu
2024-12-10 18:24 ` [PATCH 00/16] KVM: TDX: TDX interrupts Paolo Bonzini
2025-01-06 10:51 ` Xiaoyao Li
2025-01-06 20:08 ` Sean Christopherson
2025-01-09 2:44 ` Binbin Wu
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