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 F1877EE49A5 for ; Mon, 21 Aug 2023 08:49:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234106AbjHUIt6 (ORCPT ); Mon, 21 Aug 2023 04:49:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234168AbjHUItz (ORCPT ); Mon, 21 Aug 2023 04:49:55 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B86E8F for ; Mon, 21 Aug 2023 01:49:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1692607746; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=dmyDG4iJYYAx+AQ3QidNKVuxAstbv5AT9k9zWWqn+/I=; b=b7nNae1v2uqdh2ddjxp1tn87tP9TzDJcRl14PZhnQVGxzNDeD4ykB/Le0jVMd04DoVm5AQ TZI6eP4DXVqEkAIeZpXRiqvuOQyi3uktuXTm0xS56Z73NQCkCzjT0MAPAB/dkWGf0KRv/b HDSdDyJpVccuvXdpRvj9p63OXGER2FM= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-630-_ILulIkLNLeMUmPVJkC-Nw-1; Mon, 21 Aug 2023 04:49:03 -0400 X-MC-Unique: _ILulIkLNLeMUmPVJkC-Nw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id BE05F185A792; Mon, 21 Aug 2023 08:49:02 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.139]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1B67D2166B25; Mon, 21 Aug 2023 08:49:00 +0000 (UTC) Date: Mon, 21 Aug 2023 09:48:58 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Xiaoyao Li Cc: Paolo Bonzini , Richard Henderson , "Michael S. Tsirkin" , Marcel Apfelbaum , Igor Mammedov , Ani Sinha , Peter Xu , David Hildenbrand , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Cornelia Huck , Eric Blake , Markus Armbruster , Marcelo Tosatti , Gerd Hoffmann , qemu-devel@nongnu.org, kvm@vger.kernel.org, Eduardo Habkost , Laszlo Ersek , Isaku Yamahata , erdemaktas@google.com, Chenyi Qiang Subject: Re: [PATCH v2 07/58] i386/tdx: Introduce is_tdx_vm() helper and cache tdx_guest object Message-ID: Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= References: <20230818095041.1973309-1-xiaoyao.li@intel.com> <20230818095041.1973309-8-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230818095041.1973309-8-xiaoyao.li@intel.com> User-Agent: Mutt/2.2.9 (2022-11-12) X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, Aug 18, 2023 at 05:49:50AM -0400, Xiaoyao Li wrote: > It will need special handling for TDX VMs all around the QEMU. > Introduce is_tdx_vm() helper to query if it's a TDX VM. > > Cache tdx_guest object thus no need to cast from ms->cgs every time. > > Signed-off-by: Xiaoyao Li > Acked-by: Gerd Hoffmann > --- > target/i386/kvm/tdx.c | 13 +++++++++++++ > target/i386/kvm/tdx.h | 10 ++++++++++ > 2 files changed, 23 insertions(+) > > diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c > index 255c47a2a553..56cb826f6125 100644 > --- a/target/i386/kvm/tdx.c > +++ b/target/i386/kvm/tdx.c > @@ -21,8 +21,16 @@ > #include "kvm_i386.h" > #include "tdx.h" > > +static TdxGuest *tdx_guest; > + > static struct kvm_tdx_capabilities *tdx_caps; > > +/* It's valid after kvm_confidential_guest_init()->kvm_tdx_init() */ > +bool is_tdx_vm(void) > +{ > + return !!tdx_guest; > +} > + > enum tdx_ioctl_level{ > TDX_PLATFORM_IOCTL, > TDX_VM_IOCTL, > @@ -109,10 +117,15 @@ static void get_tdx_capabilities(void) > > int tdx_kvm_init(MachineState *ms, Error **errp) > { > + TdxGuest *tdx = (TdxGuest *)object_dynamic_cast(OBJECT(ms->cgs), > + TYPE_TDX_GUEST); This method can return NULL. Presumably tdx_kvm_init() should only be called if we already checked ms->cgs == TYPE_TDX_GUEST. If so then use object_dynamic_cast_assert() instead. > + > if (!tdx_caps) { > get_tdx_capabilities(); > } > > + tdx_guest = tdx; > + > return 0; > } > > diff --git a/target/i386/kvm/tdx.h b/target/i386/kvm/tdx.h > index c8a23d95258d..4036ca2f3f99 100644 > --- a/target/i386/kvm/tdx.h > +++ b/target/i386/kvm/tdx.h > @@ -1,6 +1,10 @@ > #ifndef QEMU_I386_TDX_H > #define QEMU_I386_TDX_H > > +#ifndef CONFIG_USER_ONLY > +#include CONFIG_DEVICES /* CONFIG_TDX */ > +#endif > + > #include "exec/confidential-guest-support.h" > > #define TYPE_TDX_GUEST "tdx-guest" > @@ -16,6 +20,12 @@ typedef struct TdxGuest { > uint64_t attributes; /* TD attributes */ > } TdxGuest; > > +#ifdef CONFIG_TDX > +bool is_tdx_vm(void); > +#else > +#define is_tdx_vm() 0 > +#endif /* CONFIG_TDX */ > + > int tdx_kvm_init(MachineState *ms, Error **errp); > > #endif /* QEMU_I386_TDX_H */ > -- > 2.34.1 > With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|