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Wed, 22 Jan 2020 18:56:38 +0000 MIME-Version: 1.0 Date: Wed, 22 Jan 2020 18:56:38 +0000 From: Marc Zyngier To: Will Deacon , Mike Rapoport Subject: Re: [PATCH v2 0/1] arm/arm64: add support for folded p4d page tables In-Reply-To: <20200122185017.GA17321@willie-the-truck> References: <20200113111323.10463-1-rppt@kernel.org> <20200122185017.GA17321@willie-the-truck> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: will@kernel.org, rppt@kernel.org, linux-arm-kernel@lists.infradead.org, anshuman.khandual@arm.com, catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, linux@armlinux.org.uk, suzuki.poulose@arm.com, kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org, linux-kernel@vger.kernel.org, rppt@linux.ibm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: Anshuman Khandual , Catalin Marinas , Russell King , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, Mike Rapoport , kvmarm@lists.cs.columbia.edu 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On 2020-01-22 18:50, Will Deacon wrote: > On Mon, Jan 13, 2020 at 01:13:22PM +0200, Mike Rapoport wrote: >> From: Mike Rapoport >> >> This is a part of clean up of the page table manipulation code that >> aims to >> remove asm-generic/5level-fixup.h and asm-generic/pgtable-nop4d-hack.h >> >> There is a single patch for both arm and arm64 because doing the >> conversion >> separately would mean breaking the shared mmu bits in virt/kvm/arm. > > Unfortunately, that's going to be really hard to merge, as the two > architectures are maintained in different trees and the breadth of this > patch series is likely to lead to conflicts in both. But maybe this is the reason we've all been waiting for, for which we sacrifice 32bit KVM host on the altar of progress, and finally move along. Will and I are the only known users, and that'd be a good incentive to experience some if this 64bit goodness... ;-) M. -- Jazz is not dead. It just smells funny... _______________________________________________ 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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 3A1F3C2D0DB for ; Wed, 22 Jan 2020 18:56:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 1831E24673 for ; Wed, 22 Jan 2020 18:56:50 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Wed, 22 Jan 2020 18:56:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579719400; bh=A1sveuLlqqQKceZWUAfaJuEVgzcWTxZ9DNy4YwMID1M=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=QZ8CdyDm7SZ5aEnXV0NmjiW3eVtkqaHu+EdT4hcHHRfmTQZepyKl8Hrn/qG/z4MdD xT/kCCT1tnBwgq5siEH90jGhstBx1yUgCoGOjf+4XEkIbP3lXVvA1jGuk1qQSDq7LQ 0/t5wVmcbzzRXcOeast0al9DP3vMqfgwn8b9JF00= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1iuLB8-000o1p-9q; Wed, 22 Jan 2020 18:56:38 +0000 MIME-Version: 1.0 Date: Wed, 22 Jan 2020 18:56:38 +0000 From: Marc Zyngier To: Will Deacon , Mike Rapoport Subject: Re: [PATCH v2 0/1] arm/arm64: add support for folded p4d page tables In-Reply-To: <20200122185017.GA17321@willie-the-truck> References: <20200113111323.10463-1-rppt@kernel.org> <20200122185017.GA17321@willie-the-truck> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: will@kernel.org, rppt@kernel.org, linux-arm-kernel@lists.infradead.org, anshuman.khandual@arm.com, catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, linux@armlinux.org.uk, suzuki.poulose@arm.com, kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org, linux-kernel@vger.kernel.org, rppt@linux.ibm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200122_105640_836337_E14AFB52 X-CRM114-Status: GOOD ( 12.15 ) 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: Anshuman Khandual , Catalin Marinas , Suzuki K Poulose , Russell King , linux-kernel@vger.kernel.org, linux-mm@kvack.org, James Morse , linux-arm-kernel@lists.infradead.org, Mike Rapoport , kvmarm@lists.cs.columbia.edu, Julien Thierry Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2020-01-22 18:50, Will Deacon wrote: > On Mon, Jan 13, 2020 at 01:13:22PM +0200, Mike Rapoport wrote: >> From: Mike Rapoport >> >> This is a part of clean up of the page table manipulation code that >> aims to >> remove asm-generic/5level-fixup.h and asm-generic/pgtable-nop4d-hack.h >> >> There is a single patch for both arm and arm64 because doing the >> conversion >> separately would mean breaking the shared mmu bits in virt/kvm/arm. > > Unfortunately, that's going to be really hard to merge, as the two > architectures are maintained in different trees and the breadth of this > patch series is likely to lead to conflicts in both. But maybe this is the reason we've all been waiting for, for which we sacrifice 32bit KVM host on the altar of progress, and finally move along. Will and I are the only known users, and that'd be a good incentive to experience some if this 64bit goodness... ;-) M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 8691DC2D0DB for ; Wed, 22 Jan 2020 18:56:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 56FD822522 for ; Wed, 22 Jan 2020 18:56:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="QZ8CdyDm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 56FD822522 Authentication-Results: mail.kernel.org; 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Wed, 22 Jan 2020 18:56:40 +0000 (UTC) Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F26B121835; Wed, 22 Jan 2020 18:56:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579719400; bh=A1sveuLlqqQKceZWUAfaJuEVgzcWTxZ9DNy4YwMID1M=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=QZ8CdyDm7SZ5aEnXV0NmjiW3eVtkqaHu+EdT4hcHHRfmTQZepyKl8Hrn/qG/z4MdD xT/kCCT1tnBwgq5siEH90jGhstBx1yUgCoGOjf+4XEkIbP3lXVvA1jGuk1qQSDq7LQ 0/t5wVmcbzzRXcOeast0al9DP3vMqfgwn8b9JF00= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1iuLB8-000o1p-9q; Wed, 22 Jan 2020 18:56:38 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 22 Jan 2020 18:56:38 +0000 From: Marc Zyngier To: Will Deacon , Mike Rapoport Cc: linux-arm-kernel@lists.infradead.org, Anshuman Khandual , Catalin Marinas , James Morse , Julien Thierry , Russell King , Suzuki K Poulose , kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Rapoport Subject: Re: [PATCH v2 0/1] arm/arm64: add support for folded p4d page tables In-Reply-To: <20200122185017.GA17321@willie-the-truck> References: <20200113111323.10463-1-rppt@kernel.org> <20200122185017.GA17321@willie-the-truck> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: will@kernel.org, rppt@kernel.org, linux-arm-kernel@lists.infradead.org, anshuman.khandual@arm.com, catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, linux@armlinux.org.uk, suzuki.poulose@arm.com, kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org, linux-kernel@vger.kernel.org, rppt@linux.ibm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2020-01-22 18:50, Will Deacon wrote: > On Mon, Jan 13, 2020 at 01:13:22PM +0200, Mike Rapoport wrote: >> From: Mike Rapoport >> >> This is a part of clean up of the page table manipulation code that >> aims to >> remove asm-generic/5level-fixup.h and asm-generic/pgtable-nop4d-hack.h >> >> There is a single patch for both arm and arm64 because doing the >> conversion >> separately would mean breaking the shared mmu bits in virt/kvm/arm. > > Unfortunately, that's going to be really hard to merge, as the two > architectures are maintained in different trees and the breadth of this > patch series is likely to lead to conflicts in both. But maybe this is the reason we've all been waiting for, for which we sacrifice 32bit KVM host on the altar of progress, and finally move along. Will and I are the only known users, and that'd be a good incentive to experience some if this 64bit goodness... ;-) M. -- Jazz is not dead. It just smells funny...