linux-kernel - Re: [RFC PATCH v2] PCI: hv: Avoid the retarget interrupt hypercall in irq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <164621616889.27346.10460850825594773169.b4-ty@arm.com>
Date:   Wed,  2 Mar 2022 10:16:25 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Boqun Feng <boqun.feng@...il.com>, Wei Liu <wei.liu@...nel.org>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sunil Muthuswamy <sunilmut@...ux.microsoft.com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        linux-kernel@...r.kernel.org, Rob Herring <robh@...nel.org>,
        Dexuan Cui <decui@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        linux-hyperv@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-pci@...r.kernel.org, "K. Y. Srinivasan" <kys@...rosoft.com>
Subject: Re: [RFC PATCH v2] PCI: hv: Avoid the retarget interrupt hypercall in irq_unmask() on ARM64

On Thu, 17 Feb 2022 11:45:19 +0800, Boqun Feng wrote:
> On ARM64 Hyper-V guests, SPIs are used for the interrupts of virtual PCI
> devices, and SPIs can be managed directly via GICD registers. Therefore
> the retarget interrupt hypercall is not needed on ARM64.
> 
> An arch-specific interface hv_arch_irq_unmask() is introduced to handle
> the architecture level differences on this. For x86, the behavior
> remains unchanged, while for ARM64 no hypercall is invoked when
> unmasking an irq for virtual PCI devices.
> 
> [...]

Applied to pci/hv, thanks!

[1/1] PCI: hv: Avoid the retarget interrupt hypercall in irq_unmask() on ARM64
      https://git.kernel.org/lpieralisi/pci/c/d06957d7a6

Thanks,
Lorenzo