From owner-dev-commits-src-main@freebsd.org Wed Jul 28 15:27:55 2021 Return-Path: Delivered-To: dev-commits-src-main@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 0944765D61E; Wed, 28 Jul 2021 15:27:55 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4GZcx66dd1z3LTj; Wed, 28 Jul 2021 15:27:54 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id B886B2071B; Wed, 28 Jul 2021 15:27:54 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 16SFRs3o087984; Wed, 28 Jul 2021 15:27:54 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 16SFRsUZ087983; Wed, 28 Jul 2021 15:27:54 GMT (envelope-from git) Date: Wed, 28 Jul 2021 15:27:54 GMT Message-Id: <202107281527.16SFRsUZ087983@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: =?utf-8?Q?Roger Pau Monn=C3=A9?= Subject: git: e627e25d761f - main - xen/xenpv: remove low memory limit for non-x86 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: royger X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: e627e25d761f8a11e9e5881e804fae5793404947 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Jul 2021 15:27:55 -0000 The branch main has been updated by royger: URL: https://cgit.FreeBSD.org/src/commit/?id=e627e25d761f8a11e9e5881e804fae5793404947 commit e627e25d761f8a11e9e5881e804fae5793404947 Author: Elliott Mitchell AuthorDate: 2021-04-06 09:28:38 +0000 Commit: Roger Pau Monné CommitDate: 2021-07-28 15:27:03 +0000 xen/xenpv: remove low memory limit for non-x86 For embedded devices reserved addresses will be known in advance. More recently added devices will also likely be correctly updated. As a result using any available address is reasonable on non-x86. Reviewed by: royger Differential Revision: https://reviews.freebsd.org/D29304 --- sys/dev/xen/bus/xenpv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sys/dev/xen/bus/xenpv.c b/sys/dev/xen/bus/xenpv.c index 080c82c73f08..42f2c88a2885 100644 --- a/sys/dev/xen/bus/xenpv.c +++ b/sys/dev/xen/bus/xenpv.c @@ -55,13 +55,17 @@ __FBSDID("$FreeBSD$"); * * Since this is not possible on i386 just use any available memory * chunk above 1MB and hope we don't clash with anything else. + * + * Other architectures better document MMIO regions and drivers more + * reliably reserve them. As such, allow using any unpopulated memory + * region. */ #ifdef __amd64__ #define LOW_MEM_LIMIT 0x100000000ul #elif defined(__i386__) #define LOW_MEM_LIMIT 0x100000ul #else -#error "Unsupported architecture" +#define LOW_MEM_LIMIT 0 #endif static devclass_t xenpv_devclass;