linux-kernel - Re: [PATCH v4 18/28] KVM: TDX: Combine KVM_BUG_ON + pr_tdx_error() into TDX_BUG

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Message-ID: <2bb2f7a9885bd24c4773afe15839958d30000e39.camel@intel.com>
Date: Thu, 30 Oct 2025 23:20:36 +0000
From: "Huang, Kai" <kai.huang@...el.com>
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Subject: Re: [PATCH v4 18/28] KVM: TDX: Combine KVM_BUG_ON + pr_tdx_error()
 into TDX_BUG_ON()

On Thu, 2025-10-30 at 13:09 -0700, Sean Christopherson wrote:
> Add TDX_BUG_ON() macros (with varying numbers of arguments) to deduplicate
> the myriad flows that do KVM_BUG_ON()/WARN_ON_ONCE() followed by a call to
> pr_tdx_error().  In addition to reducing boilerplate copy+paste code, this
> also helps ensure that KVM provides consistent handling of SEAMCALL errors.
> 
> Opportunistically convert a handful of bare WARN_ON_ONCE() paths to the
> equivalent of KVM_BUG_ON(), i.e. have them terminate the VM.  If a SEAMCALL
> error is fatal enough to WARN on, it's fatal enough to terminate the TD.
> 
> Reviewed-by: Rick Edgecombe <rick.p.edgecombe@...el.com>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Kai Huang <kai.huang@...el.com>