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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 E1615C433E2 for ; Sat, 20 Mar 2021 13:28:59 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 7237761966 for ; Sat, 20 Mar 2021 13:28:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7237761966 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 46D0D4B20A; Sat, 20 Mar 2021 09:28:58 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ILzqPLOhTuLc; Sat, 20 Mar 2021 09:28:57 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 8B2AD4B2DD; Sat, 20 Mar 2021 09:28:54 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4EA7F4B65D for ; Fri, 19 Mar 2021 12:18:04 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3gxbM+VVBFR1 for ; Fri, 19 Mar 2021 12:18:03 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1FB6F4B606 for ; Fri, 19 Mar 2021 12:18:03 -0400 (EDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C38E9113E; Fri, 19 Mar 2021 09:18:02 -0700 (PDT) Received: from yoan-MS-7758.Home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 583FD3F718; Fri, 19 Mar 2021 09:18:01 -0700 (PDT) From: Yoan Picchi To: maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH 3/7] KVM: arm64: Add cached_page_invalidated counter for kvm_stat Date: Fri, 19 Mar 2021 16:17:07 +0000 Message-Id: <20210319161711.24972-4-yoan.picchi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210319161711.24972-1-yoan.picchi@arm.com> References: <20210319161711.24972-1-yoan.picchi@arm.com> X-Mailman-Approved-At: Sat, 20 Mar 2021 09:28:53 -0400 Cc: catalin.marinas@arm.com, Yoan Picchi , will@kernel.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Add some counter for when a dpage get invalidated. The counter isn't in the function that actually do it though because it doesn't have either a kvm or vcpu argument, so we would have no way to access the counters. For this reason, the counter have been added to the calling functions instead. Signed-off-by: Yoan Picchi --- arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/guest.c | 1 + arch/arm64/kvm/mmu.c | 5 ++++- 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 863603285..3609aa89d 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -547,6 +547,7 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) struct kvm_vm_stat { ulong remote_tlb_flush; + ulong cached_page_invalidated; }; struct kvm_vcpu_stat { diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 1029976ca..f6b1f0b63 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -41,6 +41,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("regular_page_mapped", regular_page_mapped), VCPU_STAT("huge_page_mapped", huge_page_mapped), VM_STAT("remote_tlb_flush", remote_tlb_flush), + VM_STAT("cached_page_invalidated", cached_page_invalidated), VCPU_STAT("exits", exits), VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 55d7fe63b..d6ddf5ab8 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -893,8 +893,10 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa, if (writable) prot |= KVM_PGTABLE_PROT_W; - if (fault_status != FSC_PERM && !device) + if (fault_status != FSC_PERM && !device) { clean_dcache_guest_page(pfn, vma_pagesize); + kvm->stat.cached_page_invalidated++; + } if (exec_fault) { prot |= KVM_PGTABLE_PROT_X; @@ -1166,6 +1168,7 @@ int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) * just like a translation fault and clean the cache to the PoC. */ clean_dcache_guest_page(pfn, PAGE_SIZE); + kvm->stat.cached_page_invalidated++; handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &pfn); return 0; } -- 2.17.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm