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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hugei-0006ra-GK; Mon, 05 Aug 2019 17:20:20 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hugeS-0005p7-VL for linux-arm-kernel@lists.infradead.org; Mon, 05 Aug 2019 17:20:06 +0000 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 296AD344; Mon, 5 Aug 2019 10:20:04 -0700 (PDT) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.196.78]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 25F473F694; Mon, 5 Aug 2019 10:20:03 -0700 (PDT) Date: Mon, 5 Aug 2019 18:20:01 +0100 From: Catalin Marinas To: Steve Capper Subject: Re: [PATCH V4 05/11] arm64: mm: Introduce VA_BITS_MIN Message-ID: <20190805172000.GL4175@arrakis.emea.arm.com> References: <20190729162117.832-1-steve.capper@arm.com> <20190729162117.832-6-steve.capper@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190729162117.832-6-steve.capper@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190805_102005_104991_79D101EF X-CRM114-Status: GOOD ( 10.31 ) 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: crecklin@redhat.com, ard.biesheuvel@linaro.org, maz@kernel.org, bhsharma@redhat.com, will@kernel.org, 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+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jul 29, 2019 at 05:21:11PM +0100, Steve Capper wrote: > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index f7f23e47c28f..0206804b0868 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -797,6 +797,10 @@ config ARM64_VA_BITS > default 47 if ARM64_VA_BITS_47 > default 48 if ARM64_VA_BITS_48 || ARM64_USER_VA_BITS_52 > > +config ARM64_VA_BITS_MIN > + int > + default ARM64_VA_BITS > + > choice > prompt "Physical address space size" > default ARM64_PA_BITS_48 [...] > diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h > index 8b0f1599b2d1..a8a91a573bff 100644 > --- a/arch/arm64/include/asm/memory.h > +++ b/arch/arm64/include/asm/memory.h > @@ -52,6 +52,9 @@ > #define PCI_IO_END (VMEMMAP_START - SZ_2M) > #define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE) > #define FIXADDR_TOP (PCI_IO_START - SZ_2M) > +#define VA_BITS_MIN (CONFIG_ARM64_VA_BITS_MIN) Thinking about it, do we actually need a Kconfig option for VA_BITS_MIN? Can we not just generated it here based on VA_BITS as min(48, VA_BITS)? -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel