From patchwork Thu Dec 8 19:38:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Matlack X-Patchwork-Id: 13068755 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 8E1E2C10F31 for ; Thu, 8 Dec 2022 19:39:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229834AbiLHTjn (ORCPT ); Thu, 8 Dec 2022 14:39:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229795AbiLHTjc (ORCPT ); Thu, 8 Dec 2022 14:39:32 -0500 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2340F99F30 for ; Thu, 8 Dec 2022 11:39:26 -0800 (PST) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-3bd1ff8fadfso24704487b3.18 for ; Thu, 08 Dec 2022 11:39:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=jgO+J07Uxt+qL/UpUVJ8WFrJDihM9AG5kpD8vJwjTTs=; b=QrMj5zLDlUXO+ZJ45hsRtxdfgmeW4IfijEqSAU7FIBqFwathovRwq/mzAGouVficrL gQcJIU9VmUG2hiNERRKbyTP3Lu3VIHMZ2AloTdIYXMt+wMOuMe8kDJQZMRgSvO6lAwNU Y6eBROrQrZ0gTi3qA1W8jY3mdXkghgQbhZG8f+ggIaWBggOtbOEtA4aAL9qoZ6wA6iTL UulvutyuA0lBG+LimgEdM3A93jCX+bLrq+G1CQa39qEIq4rZ4XwAKrU+qa0csJ6wjd9Z 9Ua/MZeoHkveM5nl5wYxeuSnKf6S8qPxrJT/LRGNG++VotU8B0SenTfkKWEFNecwApXV JVtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=jgO+J07Uxt+qL/UpUVJ8WFrJDihM9AG5kpD8vJwjTTs=; b=nh4VjEe6IO2LepQLLp3u9aCb3tFAH2WL+CmvY4yL/Evi6UlAypF2/4omZ5Wf7RkRaS MI7bB4yt/QkkeeaUHpO/LfgsSQkXRgLP2I970Psbj4eNG20p7M3KAv2JfEeBg30mPZQ9 PtD1c5u0n4kpnY0OK0tdBeA1aTFe87avch3XhInPzse+qiEq9AS4YswuDCB6CUwzU8yD t/di1L92Ey4q18D81YL+i+nrx+hSzZrGYCN9wd54MSEJq09peNVOSTSLFDw52Arr2eSY APY/dvUYYlqdgRzPNLKan9Q8QgqxfBUTnhi2z8sZRTQ9RCI8PJC3zsmlDo08xIxLQ0tE E/jg== X-Gm-Message-State: ANoB5pmXctZgd9mwciuW4jPsbkrgd/gwkWGJoquTzBazwQldTpM1l4YL 2W+cfePGwVlmY06CXUpFJ9wnZVFKKDcMjg== X-Google-Smtp-Source: AA0mqf4cuymNRC2hTArY/T3ebCSKh1ZW9fvhwu59cqHtPCYYXp2h3U5rWse1hGwJtXv7Z28ATD5Q6YFLoVGbsg== X-Received: from dmatlack-n2d-128.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:1309]) (user=dmatlack job=sendgmr) by 2002:a25:d03:0:b0:706:e165:f752 with SMTP id 3-20020a250d03000000b00706e165f752mr8717208ybn.510.1670528365193; Thu, 08 Dec 2022 11:39:25 -0800 (PST) Date: Thu, 8 Dec 2022 11:38:31 -0800 In-Reply-To: <20221208193857.4090582-1-dmatlack@google.com> Mime-Version: 1.0 References: <20221208193857.4090582-1-dmatlack@google.com> X-Mailer: git-send-email 2.39.0.rc1.256.g54fd8350bd-goog Message-ID: <20221208193857.4090582-12-dmatlack@google.com> Subject: [RFC PATCH 11/37] KVM: MMU: Move RET_PF_* into common code From: David Matlack To: Paolo Bonzini Cc: Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Oliver Upton , Huacai Chen , Aleksandar Markovic , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , Andrew Morton , David Matlack , Anshuman Khandual , Nadav Amit , "Matthew Wilcox (Oracle)" , Vlastimil Babka , "Liam R. Howlett" , Suren Baghdasaryan , Peter Xu , xu xin , Arnd Bergmann , Yu Zhao , Colin Cross , Hugh Dickins , Ben Gardon , Mingwei Zhang , Krish Sadhukhan , Ricardo Koller , Jing Zhang , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Move the RET_PF_* enum into common code in preparation for moving the TDP MMU into common code. Signed-off-by: David Matlack --- arch/x86/kvm/mmu/mmu_internal.h | 28 ---------------------------- include/kvm/mmu_types.h | 26 ++++++++++++++++++++++++++ 2 files changed, 26 insertions(+), 28 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h index 4abb80a3bd01..d3c1d08002af 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -79,34 +79,6 @@ static inline bool is_nx_huge_page_enabled(struct kvm *kvm) int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault); -/* - * Return values of handle_mmio_page_fault(), mmu.page_fault(), fast_page_fault(), - * and of course kvm_mmu_do_page_fault(). - * - * RET_PF_CONTINUE: So far, so good, keep handling the page fault. - * RET_PF_RETRY: let CPU fault again on the address. - * RET_PF_EMULATE: mmio page fault, emulate the instruction directly. - * RET_PF_INVALID: the spte is invalid, let the real page fault path update it. - * RET_PF_FIXED: The faulting entry has been fixed. - * RET_PF_SPURIOUS: The faulting entry was already fixed, e.g. by another vCPU. - * - * Any names added to this enum should be exported to userspace for use in - * tracepoints via TRACE_DEFINE_ENUM() in mmutrace.h - * - * Note, all values must be greater than or equal to zero so as not to encroach - * on -errno return values. Somewhat arbitrarily use '0' for CONTINUE, which - * will allow for efficient machine code when checking for CONTINUE, e.g. - * "TEST %rax, %rax, JNZ", as all "stop!" values are non-zero. - */ -enum { - RET_PF_CONTINUE = 0, - RET_PF_RETRY, - RET_PF_EMULATE, - RET_PF_INVALID, - RET_PF_FIXED, - RET_PF_SPURIOUS, -}; - static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 err, bool prefetch) { diff --git a/include/kvm/mmu_types.h b/include/kvm/mmu_types.h index 9f0ca920bf68..07c9962f9aea 100644 --- a/include/kvm/mmu_types.h +++ b/include/kvm/mmu_types.h @@ -110,4 +110,30 @@ struct kvm_page_fault { struct kvm_page_fault_arch arch; }; +/* + * Return values for page fault handling routines. + * + * RET_PF_CONTINUE: So far, so good, keep handling the page fault. + * RET_PF_RETRY: let CPU fault again on the address. + * RET_PF_EMULATE: mmio page fault, emulate the instruction directly. + * RET_PF_INVALID: the spte is invalid, let the real page fault path update it. + * RET_PF_FIXED: The faulting entry has been fixed. + * RET_PF_SPURIOUS: The faulting entry was already fixed, e.g. by another vCPU. + * + * Any names added to this enum should be exported to userspace for use in + * tracepoints via TRACE_DEFINE_ENUM() in arch/x86/kvm/mmu/mmutrace.h. + * + * Note, all values must be greater than or equal to zero so as not to encroach + * on -errno return values. Somewhat arbitrarily use '0' for CONTINUE, which + * will allow for efficient machine code when checking for CONTINUE. + */ +enum { + RET_PF_CONTINUE = 0, + RET_PF_RETRY, + RET_PF_EMULATE, + RET_PF_INVALID, + RET_PF_FIXED, + RET_PF_SPURIOUS, +}; + #endif /* !__KVM_MMU_TYPES_H */