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From: Sean Christopherson <seanjc@google.com>
To: Yosry Ahmed <yosry.ahmed@linux.dev>
Cc: Kevin Cheng <chengkev@google.com>,
	pbonzini@redhat.com, kvm@vger.kernel.org,
	 linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2 1/5] KVM: SVM: Move STGI and CLGI intercept handling
Date: Thu, 15 Jan 2026 09:29:40 -0800	[thread overview]
Message-ID: <aWkkBPH3IWn40rVN@google.com> (raw)
In-Reply-To: <ugrjf3qqpeqafg6tnavw6p4l5seapl6mfx6ypypka25shvu6by@pq4qpwn24dyi>

On Thu, Jan 15, 2026, Yosry Ahmed wrote:
> On Thu, Jan 15, 2026 at 09:00:07AM -0800, Sean Christopherson wrote:
> > On Thu, Jan 15, 2026, Yosry Ahmed wrote:
> > > Or maybe it's clearer if we just put the checks in a helper like
> > > svm_waiting_for_gif() or svm_pending_gif_interrupt().
> > 
> > This was my first idea as well, though I would name it svm_has_pending_gif_event()
> > to better align with kvm_vcpu_has_events().
> 
> svm_has_pending_gif_event() sounds good.
> 
> > 
> > I suggested a single helper because I don't love that how to react to the pending
> > event is duplicated.  But I definitely don't object to open coding the request if
> > the consensus is that it's more readable overall.
> 
> A single helper is nice, but I can't think of a name that would read
> well. My first instinct is svm_check_pending_gif_event(), but we are not
> really checking the event as much as requesting for it to be checked.

Ya, that's the same problem I'm having.  I can't even come up with an absurdly
verbose name to describe the behavior.

> We can do svm_request_gif_event(), perhaps? Not sure if that's better or
> worse than svm_has_pending_gif_event().

Definitely worse in my opinion.  My entire motivation for a single helper would
be to avoid bleeding implementation details (use of KVM_REQ_EVENT) to trigger
the potential re-evaluation STGI/CLGI intercepts.  And then there's the fact that
in most cases, there probably isn't a pending event, i.e. not request will be
made.

Let's just go with svm_has_pending_gif_event().

  reply	other threads:[~2026-01-15 17:29 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-12 17:45 [PATCH V2 0/5] Align SVM with APM defined behaviors Kevin Cheng
2026-01-12 17:45 ` [PATCH V2 1/5] KVM: SVM: Move STGI and CLGI intercept handling Kevin Cheng
2026-01-12 20:37   ` Yosry Ahmed
2026-01-15  1:39     ` Sean Christopherson
2026-01-15 16:41       ` Yosry Ahmed
2026-01-15 17:00         ` Sean Christopherson
2026-01-15 17:05           ` Yosry Ahmed
2026-01-15 17:29             ` Sean Christopherson [this message]
2026-01-22  4:59               ` Kevin Cheng
2026-01-12 17:45 ` [PATCH V2 2/5] KVM: SVM: Inject #UD for STGI if EFER.SVME=0 and SVM Lock and DEV are not available Kevin Cheng
2026-01-12 20:50   ` Yosry Ahmed
2026-01-22  5:02     ` Kevin Cheng
2026-01-12 17:45 ` [PATCH V2 3/5] KVM: SVM: Inject #UD for INVLPGA if EFER.SVME=0 Kevin Cheng
2026-01-12 20:51   ` Yosry Ahmed
2026-01-12 17:45 ` [PATCH V2 4/5] KVM: SVM: Recalc instructions intercepts when EFER.SVME is toggled Kevin Cheng
2026-01-12 17:45 ` [PATCH V2 5/5] KVM: SVM: Raise #UD if VMMCALL instruction is not intercepted Kevin Cheng
2026-01-12 20:54   ` Yosry Ahmed
2026-01-14  5:20   ` Manali Shukla

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