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().
next prev parent 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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