linux-kernel - Re: [PATCH v3 0/2] x86/xen: simplify irq pvops

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Date:   Fri, 29 Oct 2021 08:21:41 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Cc:     Stefano Stabellini <sstabellini@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Deep Shah <sdeep@...are.com>,
        "VMware, Inc." <pv-drivers@...are.com>
Subject: Re: [PATCH v3 0/2] x86/xen: simplify irq pvops


On 10/28/21 3:27 AM, Juergen Gross wrote:
> The pvops function for Xen PV guests handling the interrupt flag are
> much more complex than needed.
>
> With the supported Xen hypervisor versions they can be simplified a
> lot, especially by removing the need for disabling preemption.
>
> Juergen Gross (2):
>    x86/xen: remove xen_have_vcpu_info_placement flag
>    x86/xen: switch initial pvops IRQ functions to dummy ones
>
>   arch/x86/include/asm/paravirt_types.h |   2 +
>   arch/x86/kernel/paravirt.c            |  13 ++-
>   arch/x86/xen/enlighten.c              | 116 ++++++--------------------
>   arch/x86/xen/enlighten_hvm.c          |   6 +-
>   arch/x86/xen/enlighten_pv.c           |  28 ++-----
>   arch/x86/xen/irq.c                    |  61 +-------------
>   arch/x86/xen/smp.c                    |  24 ------
>   arch/x86/xen/xen-ops.h                |   4 +-
>   8 files changed, 53 insertions(+), 201 deletions(-)
>

Applied to for-linus-5.16


-boris