From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B300C1BE66 for ; Thu, 20 Jul 2023 20:20:14 +0000 (UTC) Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-c5cea5773e8so1037170276.1 for ; Thu, 20 Jul 2023 13:20:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689884413; x=1690489213; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=s1/m4T5EZ9UQZdIAs+CFQOUhGGMJn3z6NAlZtvxtssM=; b=mbsHztlENnOTDgeCIXRdF8x4x9OfLSlTRQf7EJhk2yHC8ssudjPjJb663muGwwAUde HXusCSecX8QAy71He4xwRicW2VAZ7RFVOVmJQZun5eygpfocaFcEhJVdz1DXPqrP14f5 Q9r/63tqP/iMmto5FytBtXhV7bicbpwNBGhhzc7AVroN6uvn7SvVpiEQCLnIHWcphWhi L6PAVpT/JWEQDmjGRRbXmNFkgwEJImoyKV1xDjpLesAAmXECVa9yb/PUNJmSrVHElsLh RUk/Cxj/0yokxjf+pISM5EmdcaPLl3odQz7EeG720kJEtO6hviZvCg7ubhY+cpI9tJBr NkXw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689884413; x=1690489213; 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=s1/m4T5EZ9UQZdIAs+CFQOUhGGMJn3z6NAlZtvxtssM=; b=DvL7ENAb25TZUFXtpVDsbVDakZIvJq5nou+TztWAIxMV+TbGvgHaqfspbnbgSNWvYk KE5blm63EN9H9xSVBP39nSqnd5e9xuZJT6PI9YOcHqUMreETTahMc5u9v6sWku6zmwdj qzwqbEp+3huQtXGBKtCFY4vWdnTmbvdYC4q8HHWu31EGXEBzBSPY3yOyvxWCJwXlWJCJ gkT+WnSUcX9vH1c/XrxkzizJlE3ANt1rtisnvUS8a5jizfCBhynJsFZ8u2fn0jVUbB1s dArpHXPTThZ9bse2Wb1/0lpvtPbi3iNG4gkLdVABDz2g9N2iKdxrTPpIHEoSwbywhFH0 hgdA== X-Gm-Message-State: ABy/qLZZMWyRuAv5sMQe6mZ7MkyQO85XMjW0gngQZr+3HttCELmol9o+ W6cZlBasskIu+URP9vyGuaEwCnqhsI8= X-Google-Smtp-Source: APBJJlHJCm6H269xOtL/2AMirqWxt3kOhxlKiB8lLLwF2CbQnv6wXW7fNhFjFSiI4U52DqkXiLsyKn98s/w= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a25:4d08:0:b0:c6c:6122:5b69 with SMTP id a8-20020a254d08000000b00c6c61225b69mr236ybb.8.1689884413509; Thu, 20 Jul 2023 13:20:13 -0700 (PDT) Date: Thu, 20 Jul 2023 13:20:11 -0700 In-Reply-To: <20230720190211.GF25699@ls.amr.corp.intel.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20230718234512.1690985-1-seanjc@google.com> <20230718234512.1690985-9-seanjc@google.com> <20230720080912.g56zi5hywazrhnam@yy-desk-7060> <20230720190211.GF25699@ls.amr.corp.intel.com> Message-ID: Subject: Re: [RFC PATCH v11 08/29] KVM: Introduce per-page memory attributes From: Sean Christopherson To: Isaku Yamahata Cc: Yuan Yao , Paolo Bonzini , Marc Zyngier , Oliver Upton , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , "Matthew Wilcox (Oracle)" , Andrew Morton , Paul Moore , James Morris , "Serge E. Hallyn" , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Chao Peng , Fuad Tabba , Jarkko Sakkinen , Yu Zhang , Vishal Annapurve , Ackerley Tng , Maciej Szmigiero , Vlastimil Babka , David Hildenbrand , Quentin Perret , Michael Roth , Wang , Liam Merwick , "Kirill A . Shutemov" Content-Type: text/plain; charset="us-ascii" On Thu, Jul 20, 2023, Isaku Yamahata wrote: > On Thu, Jul 20, 2023 at 04:09:12PM +0800, > Yuan Yao wrote: > > > On Tue, Jul 18, 2023 at 04:44:51PM -0700, Sean Christopherson wrote: > > > @@ -2301,4 +2305,14 @@ static inline void kvm_account_pgtable_pages(void *virt, int nr) > > > /* Max number of entries allowed for each kvm dirty ring */ > > > #define KVM_DIRTY_RING_MAX_ENTRIES 65536 > > > > > > +#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES > > > +static inline unsigned long kvm_get_memory_attributes(struct kvm *kvm, gfn_t gfn) > > > +{ > > > + return xa_to_value(xa_load(&kvm->mem_attr_array, gfn)); > > > +} > > > + > > > +bool kvm_arch_post_set_memory_attributes(struct kvm *kvm, > > > + struct kvm_gfn_range *range); > > > > Used but no definition in this patch, it's defined in next patch 09. > > How about add weak version in this patch and let ARCHs to overide it ? > > It is guarded by CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES. Yep. I don't love the ordering, e.g. this patch can't even be compile tested until later in the series, but I wanted to separate x86 usage from the generic support code.