From: Ingo Molnar <mingo@kernel.org>
To: "Zhao, Yakui" <yakui.zhao@intel.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
bp@alien8.de, Jason Chen CJ <jason.cj.chen@intel.com>
Subject: Re: [RFC PATCH v5 3/4] x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector
Date: Fri, 26 Apr 2019 07:57:48 +0200 [thread overview]
Message-ID: <20190426055748.GA122831@gmail.com> (raw)
In-Reply-To: <12c00f28-a1a8-8642-6912-ec9b706b589e@intel.com>
* Zhao, Yakui <yakui.zhao@intel.com> wrote:
> > > > Does the hypervisor model the APIC EOI command, i.e. does it require the
> > > > APIC to be acked? I.e. would not acking the APIC create an IRQ storm?
> > >
> > > The hypervisor requires that the APIC EOI should be acked. If the EOI APIC
> > > is not acked, the APIC ISR bit for the HYPERVISOR_CALLBACK_VECTOR will not
> > > be cleared and then it will block the interrupt whose vector is lower than
> > > HYPERVISOR_CALLBACK_VECTOR.
> >
> > Ok!
> >
>
> I will add some comments for calling entering_ack_irq in
> acrn_hv_callback_handler. Is this ok to you?
Yeah, thanks!
Ingo
next prev parent reply other threads:[~2019-04-26 5:57 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-24 0:54 [RFC PATCH v5 0/4] x86: Add the support of ACRN guest under x86 Zhao Yakui
2019-04-24 0:54 ` [RFC PATCH v5 1/4] x86/Kconfig: Add new config symbol to unify conditional definition of hv_irq_callback_count Zhao Yakui
2019-04-24 0:54 ` [RFC PATCH v5 2/4] x86: Add the support of Linux guest on ACRN hypervisor Zhao Yakui
2019-04-24 0:54 ` [RFC PATCH v5 3/4] x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector Zhao Yakui
2019-04-25 7:17 ` Ingo Molnar
2019-04-25 12:42 ` Zhao, Yakui
2019-04-25 19:45 ` Ingo Molnar
2019-04-26 1:46 ` Zhao, Yakui
2019-04-26 5:57 ` Ingo Molnar [this message]
2019-04-24 0:54 ` [RFC PATCH v5 4/4] x86/acrn: Add hypercall for ACRN guest Zhao Yakui
2019-04-25 7:07 ` Ingo Molnar
2019-04-25 10:16 ` Zhao, Yakui
2019-04-25 11:00 ` Borislav Petkov
2019-04-26 3:18 ` Zhao, Yakui
2019-04-27 8:58 ` Borislav Petkov
2019-04-28 1:56 ` Zhao, Yakui
2019-04-28 10:03 ` Borislav Petkov
2019-04-29 1:24 ` Zhao, Yakui
2019-04-29 7:36 ` Borislav Petkov
2019-04-29 9:52 ` Zhao, Yakui
2019-04-24 22:20 ` [RFC PATCH v5 0/4] x86: Add the support of ACRN guest under x86 Thomas Gleixner
2019-04-25 5:44 ` Zhao, Yakui
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