From: Peter Xu <peterx@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Pei Zhang <pezhang@redhat.com>
Subject: Re: [patch 4/4] KVM: VMX: update vcpu posted-interrupt descriptor when assigning device
Date: Tue, 11 May 2021 10:39:11 -0400 [thread overview]
Message-ID: <YJqXD5gQCfzO4rT5@t490s> (raw)
In-Reply-To: <20210507220831.GA449495@fuller.cnet>
On Fri, May 07, 2021 at 07:08:31PM -0300, Marcelo Tosatti wrote:
> > Wondering whether we should add a pi_test_on() check in kvm_vcpu_has_events()
> > somehow, so that even without customized ->vcpu_check_block we should be able
> > to break the block loop (as kvm_arch_vcpu_runnable will return true properly)?
>
> static int kvm_vcpu_check_block(struct kvm_vcpu *vcpu)
> {
> int ret = -EINTR;
> int idx = srcu_read_lock(&vcpu->kvm->srcu);
>
> if (kvm_arch_vcpu_runnable(vcpu)) {
> kvm_make_request(KVM_REQ_UNHALT, vcpu); <---
> goto out;
> }
>
> Don't want to unhalt the vcpu.
Could you elaborate? It's not obvious to me why we can't do that if
pi_test_on() returns true.. we have pending post interrupts anyways, so
shouldn't we stop halting? Thanks!
--
Peter Xu
next prev parent reply other threads:[~2021-05-11 14:39 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-07 13:06 [patch 0/4] VMX: configure posted interrupt descriptor when assigning device Marcelo Tosatti
2021-05-07 13:06 ` [patch 1/4] KVM: x86: add start_assignment hook to kvm_x86_ops Marcelo Tosatti
2021-05-07 19:16 ` Peter Xu
2021-05-10 17:53 ` Marcelo Tosatti
2021-05-07 13:06 ` [patch 2/4] KVM: add arch specific vcpu_check_block callback Marcelo Tosatti
2021-05-07 13:06 ` [patch 3/4] KVM: x86: implement kvm_arch_vcpu_check_block callback Marcelo Tosatti
2021-05-07 13:06 ` [patch 4/4] KVM: VMX: update vcpu posted-interrupt descriptor when assigning device Marcelo Tosatti
2021-05-07 17:22 ` Sean Christopherson
2021-05-07 19:29 ` Peter Xu
2021-05-07 22:08 ` Marcelo Tosatti
2021-05-11 14:39 ` Peter Xu [this message]
2021-05-11 14:51 ` Marcelo Tosatti
2021-05-11 16:19 ` Peter Xu
2021-05-11 17:18 ` Marcelo Tosatti
2021-05-11 21:35 ` Peter Xu
2021-05-11 23:51 ` Marcelo Tosatti
2021-05-12 0:02 ` Marcelo Tosatti
2021-05-12 0:38 ` Peter Xu
2021-05-12 11:10 ` Marcelo Tosatti
2021-05-12 14:41 ` Sean Christopherson
2021-05-12 15:34 ` Peter Xu
2021-05-10 17:26 [patch 0/4] VMX: configure posted interrupt descriptor when assigning device (v3) Marcelo Tosatti
2021-05-10 17:26 ` [patch 4/4] KVM: VMX: update vcpu posted-interrupt descriptor when assigning device Marcelo Tosatti
2021-05-24 15:55 ` Paolo Bonzini
2021-05-24 17:53 ` Marcelo Tosatti
2021-05-25 11:58 ` Paolo Bonzini
2021-05-11 23:57 [patch 0/4] VMX: configure posted interrupt descriptor when assigning device (v4) Marcelo Tosatti
2021-05-11 23:57 ` [patch 4/4] KVM: VMX: update vcpu posted-interrupt descriptor when assigning device Marcelo Tosatti
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YJqXD5gQCfzO4rT5@t490s \
--to=peterx@redhat.com \
--cc=alex.williamson@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=mtosatti@redhat.com \
--cc=pbonzini@redhat.com \
--cc=pezhang@redhat.com \
--cc=seanjc@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).