linux-kernel - Re: [PATCH v9 15/19] KVM: selftests: Hook TDX support to vm and vcpu creation

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Message-ID: <CAAhR5DGC77bo427gQkvEq_BaJYaYXMgrw9ESq2xp=ER7pQPCLQ@mail.gmail.com>
Date: Tue, 26 Aug 2025 11:12:37 -0500
From: Sagi Shahar <sagis@...gle.com>
To: Chenyi Qiang <chenyi.qiang@...el.com>
Cc: linux-kselftest@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>, 
	Shuah Khan <shuah@...nel.org>, Sean Christopherson <seanjc@...gle.com>, 
	Ackerley Tng <ackerleytng@...gle.com>, Ryan Afranji <afranji@...gle.com>, 
	Andrew Jones <ajones@...tanamicro.com>, Isaku Yamahata <isaku.yamahata@...el.com>, 
	Erdem Aktas <erdemaktas@...gle.com>, Rick Edgecombe <rick.p.edgecombe@...el.com>, 
	Roger Wang <runanwang@...gle.com>, Binbin Wu <binbin.wu@...ux.intel.com>, 
	Oliver Upton <oliver.upton@...ux.dev>, "Pratik R. Sampat" <pratikrajesh.sampat@....com>, 
	Reinette Chatre <reinette.chatre@...el.com>, Ira Weiny <ira.weiny@...el.com>, 
	Chao Gao <chao.gao@...el.com>, linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v9 15/19] KVM: selftests: Hook TDX support to vm and vcpu creation

On Tue, Aug 26, 2025 at 3:28 AM Chenyi Qiang <chenyi.qiang@...el.com> wrote:
>
>
>
> On 8/21/2025 12:29 PM, Sagi Shahar wrote:
> > TDX require special handling for VM and VCPU initialization for various
>
> s/require/requires
>
> > reasons:
> > - Special ioctlss for creating VM and VCPU.
>
> s/ioctlss/ioctls
>
> > - TDX registers are inaccessible to KVM.
> > - TDX require special boot code trampoline for loading parameters.
>
> s/require/requires
>

ACK

> > - TDX only supports KVM_CAP_SPLIT_IRQCHIP.
> >
> > Hook this special handling into __vm_create() and vm_arch_vcpu_add()
> > using the utility functions added in previous patches.
> >
> > Signed-off-by: Sagi Shahar <sagis@...gle.com>
> > ---
> >  tools/testing/selftests/kvm/lib/kvm_util.c    | 24 ++++++++-
> >  .../testing/selftests/kvm/lib/x86/processor.c | 49 ++++++++++++++-----
> >  2 files changed, 61 insertions(+), 12 deletions(-)
> >
>