From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E455EB64D8 for ; Tue, 13 Jun 2023 21:16:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239299AbjFMVQX (ORCPT ); Tue, 13 Jun 2023 17:16:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235998AbjFMVQU (ORCPT ); Tue, 13 Jun 2023 17:16:20 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 19171133 for ; Tue, 13 Jun 2023 14:16:19 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id d2e1a72fcca58-651ce788961so3506436b3a.2 for ; Tue, 13 Jun 2023 14:16:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686690978; x=1689282978; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=zoXsbeVfXLLEsjLQrLANrMHnuV7SIcBeWtBPaSlJE0U=; b=zQ7R5o0craf7u+8BFUd0XqKzaiFd07QQ12Eidv2oX82/8xpvNaNd5d3F1TCTk6N0Hu 7fMAmHEwJDyPmDip2pmYEeWftlaTmP5dIu41ZGeOFz45S21m6tXwg30hbcF3thUzi676 vzpD724q+62Lf8U9Gs9MKk4E/8JtwMR99WvwZB1LR98kFvEt6ayHb9QgvMry583OCgJV lblJoGrE/X04cAdDQliEfEc/u/0GX09ErJvgFy+LvpVV5l8d0IOk2DTITEBHELAeAkNh 50M+uJ4OhYkQVSE9h6BW4mKFbmJK1/oUtMREUc0flhuMb3gVbi/lwRS/0faB5gRn/RtF ddZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686690978; x=1689282978; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=zoXsbeVfXLLEsjLQrLANrMHnuV7SIcBeWtBPaSlJE0U=; b=jGJ1S2jmGXcRX+e9+anUmhe//wRy5zqt2xjz3ND0qFU0U/9Gfo3f0KguSugQc9ZCWx FZumvuuIgK6a7VlfF6shGIh6UwrxpifUCKrp8GIajGqgX9CmD+3lMklQJlzAkLxaDfP/ UkCsqFFt9/U9uwEKb4RBOgQ9iXALVMs/dogEk2cfQDdPaiSC1PuPyuyERmev3ADO66fv VTl9aPRmlI1srnuu4kF9FFnS9YRbLx/hlG550dwMOpiF3er85+DWngyNXwyDmcun+XJ+ RhG2C5aP5wIwOZp02EJTFYQf/C9/J6aKCOeheXvF3o8UAh0J4TwYGv7oCDD+QKfpo0tq UxxA== X-Gm-Message-State: AC+VfDwJSPVNzZ5zJEwekIZhh8W5cHW/1GWm5xJAEqW3TYpZwCFLOeyd vkhvzkpXZHkzGmTsKgSaPcMNdMiLdK4= X-Google-Smtp-Source: ACHHUZ7p7HWyWa7uo6JIcTCl2qEWne7t8Z1pA5sTVB2E6o4i4fbc3cAgW8yVZwQOXwCLEQAIaBcF/pXVJrY= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6a00:2d1d:b0:63a:ff2a:bf9f with SMTP id fa29-20020a056a002d1d00b0063aff2abf9fmr9201pfb.2.1686690978636; Tue, 13 Jun 2023 14:16:18 -0700 (PDT) Date: Tue, 13 Jun 2023 14:16:16 -0700 In-Reply-To: <20230315101606.10636-1-wei.w.wang@intel.com> Mime-Version: 1.0 References: <20230315101606.10636-1-wei.w.wang@intel.com> Message-ID: Subject: Re: [PATCH RESEND v2] KVM: move KVM_CAP_DEVICE_CTRL to the generic check From: Sean Christopherson To: Wei Wang Cc: pbonzini@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Marc Zyngier , Oliver Upton , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org + Please use scripts/get_maintainer.pl to generate the To/Cc lists. This may be trivial, but it still needs eyeballs from the relevant maintainers. On Wed, Mar 15, 2023, Wei Wang wrote: > KVM_CAP_DEVICE_CTRL allows userspace to check if the kvm_device > framework (e.g. KVM_CREATE_DEVICE) is supported by KVM. Move > KVM_CAP_DEVICE_CTRL to the generic check for the two reasons: > 1) it already supports arch agnostic usages (i.e. KVM_DEV_TYPE_VFIO). > For example, userspace VFIO implementation may needs to create > KVM_DEV_TYPE_VFIO on x86, riscv, or arm etc. It is simpler to have it > checked at the generic code than at each arch's code. > 2) KVM_CREATE_DEVICE has been added to the generic code. > > Link: https://lore.kernel.org/all/20221215115207.14784-1-wei.w.wang@intel.com > Signed-off-by: Wei Wang > Reviewed-by: Sean Christopherson > --- > arch/arm64/kvm/arm.c | 1 - > arch/powerpc/kvm/powerpc.c | 1 - > arch/riscv/kvm/vm.c | 1 - > arch/s390/kvm/kvm-s390.c | 1 - > virt/kvm/kvm_main.c | 1 + > 5 files changed, 1 insertion(+), 4 deletions(-) > > diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c > index 3bd732eaf087..96329e675771 100644 > --- a/arch/arm64/kvm/arm.c > +++ b/arch/arm64/kvm/arm.c > @@ -202,7 +202,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) > r = vgic_present; > break; > case KVM_CAP_IOEVENTFD: > - case KVM_CAP_DEVICE_CTRL: > case KVM_CAP_USER_MEMORY: > case KVM_CAP_SYNC_MMU: > case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: > diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c > index 4c5405fc5538..185efed23896 100644 > --- a/arch/powerpc/kvm/powerpc.c > +++ b/arch/powerpc/kvm/powerpc.c > @@ -526,7 +526,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) > case KVM_CAP_ENABLE_CAP: > case KVM_CAP_ONE_REG: > case KVM_CAP_IOEVENTFD: > - case KVM_CAP_DEVICE_CTRL: > case KVM_CAP_IMMEDIATE_EXIT: > case KVM_CAP_SET_GUEST_DEBUG: > r = 1; > diff --git a/arch/riscv/kvm/vm.c b/arch/riscv/kvm/vm.c > index 65a964d7e70d..6efe93b282e1 100644 > --- a/arch/riscv/kvm/vm.c > +++ b/arch/riscv/kvm/vm.c > @@ -57,7 +57,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) > > switch (ext) { > case KVM_CAP_IOEVENTFD: > - case KVM_CAP_DEVICE_CTRL: > case KVM_CAP_USER_MEMORY: > case KVM_CAP_SYNC_MMU: > case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: > diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c > index 39b36562c043..7b097b5253ca 100644 > --- a/arch/s390/kvm/kvm-s390.c > +++ b/arch/s390/kvm/kvm-s390.c > @@ -556,7 +556,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) > case KVM_CAP_ENABLE_CAP: > case KVM_CAP_S390_CSS_SUPPORT: > case KVM_CAP_IOEVENTFD: > - case KVM_CAP_DEVICE_CTRL: > case KVM_CAP_S390_IRQCHIP: > case KVM_CAP_VM_ATTRIBUTES: > case KVM_CAP_MP_STATE: > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index d255964ec331..71cc63640173 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -4523,6 +4523,7 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) > #endif > case KVM_CAP_BINARY_STATS_FD: > case KVM_CAP_SYSTEM_EVENT_DATA: > + case KVM_CAP_DEVICE_CTRL: > return 1; > default: > break; > -- > 2.27.0 >