linux-kernel - Re: [PATCH v13 21/35] KVM: Drop superfluous __KVM_VCPU_MULTIPLE_ADDRESS

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Message-ID: <CA+EHjTzk0=24wGbxQUApAY4B-K3xO3+SOfLn1tPJk-hVJY0+GQ@mail.gmail.com>
Date:   Thu, 2 Nov 2023 14:35:36 +0000
From:   Fuad Tabba <tabba@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Huacai Chen <chenhuacai@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Anup Patel <anup@...infault.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-mips@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>,
        Xu Yilun <yilun.xu@...el.com>,
        Chao Peng <chao.p.peng@...ux.intel.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Anish Moorthy <amoorthy@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Yu Zhang <yu.c.zhang@...ux.intel.com>,
        Isaku Yamahata <isaku.yamahata@...el.com>,
        Mickaël Salaün <mic@...ikod.net>,
        Vlastimil Babka <vbabka@...e.cz>,
        Vishal Annapurve <vannapurve@...gle.com>,
        Ackerley Tng <ackerleytng@...gle.com>,
        Maciej Szmigiero <mail@...iej.szmigiero.name>,
        David Hildenbrand <david@...hat.com>,
        Quentin Perret <qperret@...gle.com>,
        Michael Roth <michael.roth@....com>,
        Wang <wei.w.wang@...el.com>,
        Liam Merwick <liam.merwick@...cle.com>,
        Isaku Yamahata <isaku.yamahata@...il.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH v13 21/35] KVM: Drop superfluous __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
 macro

On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson <seanjc@...gle.com> wrote:
>
> Drop __KVM_VCPU_MULTIPLE_ADDRESS_SPACE and instead check the value of
> KVM_ADDRESS_SPACE_NUM.
>
> No functional change intended.
>
> Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---

Reviewed-by: Fuad Tabba <tabba@...gle.com>
Tested-by: Fuad Tabba <tabba@...gle.com>

Cheers,
/fuad

>  arch/x86/include/asm/kvm_host.h | 1 -
>  include/linux/kvm_host.h        | 2 +-
>  2 files changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 8d60e4745e8b..6702f795c862 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -2124,7 +2124,6 @@ enum {
>  #define HF_SMM_MASK            (1 << 1)
>  #define HF_SMM_INSIDE_NMI_MASK (1 << 2)
>
> -# define __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
>  # define KVM_ADDRESS_SPACE_NUM 2
>  # define kvm_arch_vcpu_memslots_id(vcpu) ((vcpu)->arch.hflags & HF_SMM_MASK ? 1 : 0)
>  # define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, (role).smm)
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index e3223cafd7db..c3cfe08b1300 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -692,7 +692,7 @@ bool kvm_arch_irqchip_in_kernel(struct kvm *kvm);
>  #define KVM_MEM_SLOTS_NUM SHRT_MAX
>  #define KVM_USER_MEM_SLOTS (KVM_MEM_SLOTS_NUM - KVM_INTERNAL_MEM_SLOTS)
>
> -#ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
> +#if KVM_ADDRESS_SPACE_NUM == 1
>  static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
>  {
>         return 0;
> --
> 2.42.0.820.g83a721a137-goog
>