From patchwork Mon Jun 22 20:08:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11619057 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ADD6B138C for ; Mon, 22 Jun 2020 20:14:05 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7D4D12073E for ; Mon, 22 Jun 2020 20:14:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="XST+b4QM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7D4D12073E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=CKXE2yHH9hqZ+PRcGODcwqzZnVFM8grk2pJgEYj5uPk=; b=XST+b4QMmkNwB5sqXL8H7v+TL QujXGvQ+LUijyNP7aLeAMtsFigBN7oA4Bp8JcSGv0W9i35KCaQDIM8sMyy9+OJfuEcBkJO7MP9Dzt /VMTLZNKvlJWTwWNpb6LudxE2Cc12bOy3KgvG4raf1k8J9GRIdR1zAA1SehjphCANdMVDT1ft5ua8 N5XLfUBzalf6yNJTdcSY3bUyQ/LMWFacXTDnyx4RDQXA+P7xtZhJ6f7aTEMtsIFVnyvLKMbtlRjpO tNFF6gsLyH6au3Y+PxEm2ax2ZUj509uJAi9DrtTwakur8eW1LrsiMBvqOgacDp8SFt/suu+ekFtK8 GnQ5Zjx5w==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jnSnO-00077P-03; Mon, 22 Jun 2020 20:11:58 +0000 Received: from mga12.intel.com ([192.55.52.136]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jnSm2-0006Gp-C1 for linux-arm-kernel@lists.infradead.org; Mon, 22 Jun 2020 20:10:35 +0000 IronPort-SDR: scRGJbc/gRTFxDGOVOSigpj7QyofIW0HojSA8IMd6Hg4WsTC2LYNG+VMBNP4A8S8OmwEAUrdUI BtQYSDx0mY3w== X-IronPort-AV: E=McAfee;i="6000,8403,9660"; a="123527772" X-IronPort-AV: E=Sophos;i="5.75,268,1589266800"; d="scan'208";a="123527772" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2020 13:09:20 -0700 IronPort-SDR: fRlxaAQyOpAtUFJtU4aPsv61MGN29oTKNS8kdayKIyypwIp+KMXBcnFdHg0Jg6zwko08hy0NIe oTnziSFvoVKA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,268,1589266800"; d="scan'208";a="318877117" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.152]) by FMSMGA003.fm.intel.com with ESMTP; 22 Jun 2020 13:09:19 -0700 From: Sean Christopherson To: Marc Zyngier , Paolo Bonzini , Arnd Bergmann Subject: [PATCH v2 16/21] KVM: arm64: Drop @max param from mmu_topup_memory_cache() Date: Mon, 22 Jun 2020 13:08:17 -0700 Message-Id: <20200622200822.4426-17-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200622200822.4426-1-sean.j.christopherson@intel.com> References: <20200622200822.4426-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [192.55.52.136 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Junaid Shahid , Christoffer Dall , Wanpeng Li , kvm@vger.kernel.org, Suzuki K Poulose , Joerg Roedel , Peter Shier , linux-mips@vger.kernel.org, Sean Christopherson , linux-kernel@vger.kernel.org, James Morse , linux-arm-kernel@lists.infradead.org, Ben Gardon , Vitaly Kuznetsov , Peter Feiner , kvmarm@lists.cs.columbia.edu, Julien Thierry , Jim Mattson Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Replace the @max param in mmu_topup_memory_cache() and instead use ARRAY_SIZE() to terminate the loop to fill the cache. This removes a BUG_ON() and sets the stage for moving arm64 to the common memory cache implementation. No functional change intended. Tested-by: Marc Zyngier Signed-off-by: Sean Christopherson --- arch/arm64/kvm/mmu.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index a1f6bc70c4e4..9398b66f8a87 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -124,15 +124,13 @@ static void stage2_dissolve_pud(struct kvm *kvm, phys_addr_t addr, pud_t *pudp) put_page(virt_to_page(pudp)); } -static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, - int min, int max) +static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min) { void *page; - BUG_ON(max > KVM_NR_MEM_OBJS); if (cache->nobjs >= min) return 0; - while (cache->nobjs < max) { + while (cache->nobjs < ARRAY_SIZE(cache->objects)) { page = (void *)__get_free_page(GFP_PGTABLE_USER); if (!page) return -ENOMEM; @@ -1356,8 +1354,7 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, pte = kvm_s2pte_mkwrite(pte); ret = mmu_topup_memory_cache(&cache, - kvm_mmu_cache_min_pages(kvm), - KVM_NR_MEM_OBJS); + kvm_mmu_cache_min_pages(kvm)); if (ret) goto out; spin_lock(&kvm->mmu_lock); @@ -1737,8 +1734,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa, up_read(¤t->mm->mmap_sem); /* We need minimum second+third level pages */ - ret = mmu_topup_memory_cache(memcache, kvm_mmu_cache_min_pages(kvm), - KVM_NR_MEM_OBJS); + ret = mmu_topup_memory_cache(memcache, kvm_mmu_cache_min_pages(kvm)); if (ret) return ret;