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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 096A1C433E1 for ; Tue, 18 Aug 2020 13:28:37 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id B864020786 for ; Tue, 18 Aug 2020 13:28:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="RMX1/2Ga" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B864020786 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 6179B4B850; Tue, 18 Aug 2020 09:28:36 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org 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 j-zPVl13AJe7; Tue, 18 Aug 2020 09:28:35 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4DBF64BC5F; Tue, 18 Aug 2020 09:28:35 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 80FB54BC43 for ; Tue, 18 Aug 2020 09:28:32 -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 lrRawIRiE9ng for ; Tue, 18 Aug 2020 09:28:31 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 817114BA0F for ; Tue, 18 Aug 2020 09:28:31 -0400 (EDT) Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 45CD420786; Tue, 18 Aug 2020 13:28:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597757310; bh=e0DnMZYSpHAG3cOE9gkUfbLB2zI+Heb7Ik00ZTvLhqM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RMX1/2Ga9+jRx6jToNmCF7ruzAWlHFaUZpLVzK4hsbquCQ9rHx4vIvRTPmSM3spor Tyu8ZIFtpB5f/3S6i0nZqdh6rY3MKl/nL29aixHYCct/CKQAqVnIWyT/7msY2+wHC1 L0OzeG1u9g5VKaOY431UPyPO1OXGY6S4G6DVdqlQ= From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v2 01/22] KVM: arm64: Don't free memcache pages in kvm_phys_addr_ioremap() Date: Tue, 18 Aug 2020 14:27:57 +0100 Message-Id: <20200818132818.16065-2-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200818132818.16065-1-will@kernel.org> References: <20200818132818.16065-1-will@kernel.org> MIME-Version: 1.0 Cc: kernel-team@android.com, Marc Zyngier , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.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: , 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 kvm_phys_addr_ioremap() unconditionally empties out the memcache pages for the current vCPU on return. This causes subsequent topups to allocate fresh pages and is at odds with the behaviour when mapping memory in user_mem_abort(). Remove the call to kvm_mmu_free_memory_cache() from kvm_phys_addr_ioremap(), allowing the cached pages to be used by a later mapping. Cc: Marc Zyngier Cc: Quentin Perret Signed-off-by: Will Deacon --- arch/arm64/kvm/mmu.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 662b0c99a63d..4a24ebdc6fc6 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1489,19 +1489,17 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, ret = kvm_mmu_topup_memory_cache(&cache, kvm_mmu_cache_min_pages(kvm)); if (ret) - goto out; + break; spin_lock(&kvm->mmu_lock); ret = stage2_set_pte(&kvm->arch.mmu, &cache, addr, &pte, KVM_S2PTE_FLAG_IS_IOMAP); spin_unlock(&kvm->mmu_lock); if (ret) - goto out; + break; pfn++; } -out: - kvm_mmu_free_memory_cache(&cache); return ret; } -- 2.28.0.220.ged08abb693-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 9C0B5C433DF for ; Tue, 18 Aug 2020 13:30:40 +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 530342076D for ; Tue, 18 Aug 2020 13:30:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="SRMwfnq4"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="RMX1/2Ga" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 530342076D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.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=Gsve4RsaRdr+KfBsB0VE7VICDtWGydD5hL0Bf8DqJ6g=; b=SRMwfnq47c2nTD13WtNLtg/ZN bUPUfyY2KdFlH9/LOgWOSOYhSLRmIMbzhEFA4vcFTdDgjqS9XC2W5H3uK2dhGBI2bVy79Xty0W39H QZclhjvwU/RgAXFoJu0BX46ZlRJ3LLPu0CkwFUoS/GYgE0fD4FBJ5qL8iOiRL0YDBRz6U4Dk/lx96 fXY9SGGF4eazlrMwSfzWK1sL0mnIT2Fld5z8L6KIvPZsHMi0J3OtTOfZhLCltykFzcGFfbstuH6rB QsKUQPAC/y8+6R+pqMTj/U52ISjdSfGiB5Y81wUdwPVQcL3pFNm0/ekH+j6uHsXNkVaV3dQ1/oCzT +g+cvvvOw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k81fH-0007gW-Nr; Tue, 18 Aug 2020 13:28:35 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k81fD-0007fX-CA for linux-arm-kernel@lists.infradead.org; Tue, 18 Aug 2020 13:28:32 +0000 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 45CD420786; Tue, 18 Aug 2020 13:28:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597757310; bh=e0DnMZYSpHAG3cOE9gkUfbLB2zI+Heb7Ik00ZTvLhqM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RMX1/2Ga9+jRx6jToNmCF7ruzAWlHFaUZpLVzK4hsbquCQ9rHx4vIvRTPmSM3spor Tyu8ZIFtpB5f/3S6i0nZqdh6rY3MKl/nL29aixHYCct/CKQAqVnIWyT/7msY2+wHC1 L0OzeG1u9g5VKaOY431UPyPO1OXGY6S4G6DVdqlQ= From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v2 01/22] KVM: arm64: Don't free memcache pages in kvm_phys_addr_ioremap() Date: Tue, 18 Aug 2020 14:27:57 +0100 Message-Id: <20200818132818.16065-2-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200818132818.16065-1-will@kernel.org> References: <20200818132818.16065-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200818_092831_500772_7CC77B09 X-CRM114-Status: GOOD ( 13.73 ) 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: kernel-team@android.com, Suzuki Poulose , Marc Zyngier , Quentin Perret , James Morse , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org kvm_phys_addr_ioremap() unconditionally empties out the memcache pages for the current vCPU on return. This causes subsequent topups to allocate fresh pages and is at odds with the behaviour when mapping memory in user_mem_abort(). Remove the call to kvm_mmu_free_memory_cache() from kvm_phys_addr_ioremap(), allowing the cached pages to be used by a later mapping. Cc: Marc Zyngier Cc: Quentin Perret Signed-off-by: Will Deacon --- arch/arm64/kvm/mmu.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 662b0c99a63d..4a24ebdc6fc6 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1489,19 +1489,17 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, ret = kvm_mmu_topup_memory_cache(&cache, kvm_mmu_cache_min_pages(kvm)); if (ret) - goto out; + break; spin_lock(&kvm->mmu_lock); ret = stage2_set_pte(&kvm->arch.mmu, &cache, addr, &pte, KVM_S2PTE_FLAG_IS_IOMAP); spin_unlock(&kvm->mmu_lock); if (ret) - goto out; + break; pfn++; } -out: - kvm_mmu_free_memory_cache(&cache); return ret; } -- 2.28.0.220.ged08abb693-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel