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 X-Spam-Level: X-Spam-Status: No, score=-21.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC4A5C4338F for ; Thu, 29 Jul 2021 19:56:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 90A6A60F42 for ; Thu, 29 Jul 2021 19:56:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232506AbhG2T4s (ORCPT ); Thu, 29 Jul 2021 15:56:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229642AbhG2T4r (ORCPT ); Thu, 29 Jul 2021 15:56:47 -0400 Received: from mail-qk1-x749.google.com (mail-qk1-x749.google.com [IPv6:2607:f8b0:4864:20::749]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA8C4C0613C1 for ; Thu, 29 Jul 2021 12:56:43 -0700 (PDT) Received: by mail-qk1-x749.google.com with SMTP id e11-20020a05620a208bb02903b854c43335so3833829qka.21 for ; Thu, 29 Jul 2021 12:56:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=AybauKNFPo3SsUjhjkW3rvaT9nCugcHZc2DTga5rD+Y=; b=pDjWXDMBoqce2Uo3OFtJqZEiF7+0tG6fbwCkYp/QACm55I5LeZi6KGbTuMrSoe1cpk cKB3vxAThRuWvsRaBsGqDa70j0yjXUL+jIyrVksRTaHkqWIM7fjB12MJIG2DFRppBsET OS+SgpYNdabohr+fskGck9XrjK1I9TB5SGCPbSFDRFCvXaVN/wK3x+926RV2yAWtXm92 2RLXmBhRr2WiNQi5NX86D6YFvwO+mh5X+GudOeiT1cU81ScCAw9pXLpWtAYUlsvlEwny 7LTUROpCB9f6RyfBw38ElnczcBXFnU+VcCD28lRKwo+UoPXYplSCMMbxGekOT21/omPJ aMQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=AybauKNFPo3SsUjhjkW3rvaT9nCugcHZc2DTga5rD+Y=; b=soJeUujVPUHQW9WCjUslr6jaExgku20sWyMuYjSaTd4mf/OK7ByPys+Ymb0uTz4jFF iNPvB/RZXJ0UlOXk/FPfLOssnCcqb8VbvZu+6dz2tToWRbCxS0mDe6NOXrRZTMgiJ8Py T1zofCWE/O5SJiYszEpWdpmAyh/r/xGcA3iinA7WQIdEFTIuN0xrBRnmlJUKYTEOuZax SGsxfz3/Bw62GP5LGN0JKw9U927sY0mLdOJ+QukTCMLEap9bg7t4EBf+QfJYDc5JUiSc 32oKqVYhvdKPqkdlhKP5OJj1eOPWIvIoXOXQVYenBK6cW9PptRRwWyuNzJ/eW8BB5gya mXSw== X-Gm-Message-State: AOAM530WLl4ljxL7LsfNBx7EtYbR7j9QkToDPXH7E+/AncFSoWOq1QI2 Zb9BAJAFSEZiyUKRZL7KBGWPTepEFMI= X-Google-Smtp-Source: ABdhPJwU8WQNmo1zhH1aQzP5f0AXaA7UbdvB2nIHEOEw8XVOvuCKD7pK9ur3hioyHd+oC0Rya2glIwWuYlI= X-Received: from oupton.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:404]) (user=oupton job=sendgmr) by 2002:ad4:5c49:: with SMTP id a9mr6517273qva.27.1627588602907; Thu, 29 Jul 2021 12:56:42 -0700 (PDT) Date: Thu, 29 Jul 2021 19:56:29 +0000 Message-Id: <20210729195632.489978-1-oupton@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.32.0.554.ge1b32706d8-goog Subject: [PATCH 0/3] KVM: arm64: Use generic guest entry infrastructure From: Oliver Upton To: kvmarm@lists.cs.columbia.edu Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Catalin Marinas , Will Deacon , Thomas Gleixner , Peter Zijlstra , Andy Lutomirski , linux-arm-kernel@lists.infradead.org, Peter Shier , Shakeel Butt , Guangyu Shi , Oliver Upton Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The arm64 kernel doesn't yet support the full generic entry infrastructure. That being said, KVM/arm64 doesn't properly handle TIF_NOTIFY_RESUME and could pick this up by switching to the generic guest entry infrasturture. Patch 1 adds a missing vCPU stat to ARM64 to record the number of signal exits to userspace. Patch 2 unhitches entry-kvm from entry-generic, as ARM64 doesn't currently support the generic infrastructure. Patch 3 replaces the open-coded entry handling with the generic xfer function. This series was tested on an Ampere Mt. Jade reference system. The series cleanly applies to kvm/queue (note that this is deliberate as the generic kvm stats patches have not yet propagated to kvm-arm/queue) at the following commit: 8ad5e63649ff ("KVM: Don't take mmu_lock for range invalidation unless necessary") Oliver Upton (3): KVM: arm64: Record number of signal exits as a vCPU stat entry: KVM: Allow use of generic KVM entry w/o full generic support KVM: arm64: Use generic KVM xfer to guest work function arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/arm.c | 26 ++++++++++++++------------ arch/arm64/kvm/guest.c | 3 ++- include/linux/entry-kvm.h | 6 +++++- 5 files changed, 23 insertions(+), 14 deletions(-) -- 2.32.0.554.ge1b32706d8-goog