From owner-freebsd-virtualization@freebsd.org Tue Feb 14 16:56:06 2017 Return-Path: Delivered-To: freebsd-virtualization@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9D81CCDF9F6 for ; Tue, 14 Feb 2017 16:56:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 819FE1CFC for ; Tue, 14 Feb 2017 16:56:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v1EGu3pB031461 for ; Tue, 14 Feb 2017 16:56:06 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-virtualization@FreeBSD.org Subject: [Bug 211746] [Hyper-V] UEFI VM can't boot from the iso installation disk Date: Tue, 14 Feb 2017 16:56:04 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: marcel@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Feb 2017 16:56:06 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211746 --- Comment #10 from Marcel Moolenaar --- I just realized that efi_copy_finish() is called via trampoline(). I presume that this means that it runs with the temporary mapping that was created in elf64_exec(). We only map the 1GB of physical memory (using 2MB pages). This means that the EFI allocation must be placed below 0x40000000. However, it = is placed at 0xf37cb000. Maybe the problem is that for smaller allocations, EFI assigns low memory (= i.e. under 1GB), but for larger allocations it favors high memory? To test this theory, change efi_copy_init() and instead of passing AllocateAnyPages as the first argument, pass AllocateMaxAddress as the first argument and put a maximum address of 1GB in the staging variable before the call to AllocatePages (see also elf64_exec). Either the allocation fails, or we're guaranteed to have memory below 1GB. HTH, --=20 You are receiving this mail because: You are the assignee for the bug.=