From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752677AbeBZKzJ (ORCPT ); Mon, 26 Feb 2018 05:55:09 -0500 Received: from mx2.suse.de ([195.135.220.15]:57964 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752328AbeBZKzF (ORCPT ); Mon, 26 Feb 2018 05:55:05 -0500 Date: Mon, 26 Feb 2018 11:54:40 +0100 From: Borislav Petkov To: "Kirill A. Shutemov" Cc: Ingo Molnar , tglx@linutronix.de, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, willy@infradead.org, hpa@zytor.com, kirill.shutemov@linux.intel.com, peterz@infradead.org, gorcunov@openvz.org, luto@amacapital.net, linux-tip-commits@vger.kernel.org Subject: Re: [tip:x86/boot] x86/boot/compressed/64: Prepare trampoline memory Message-ID: <20180226105440.GB14140@pd.tnic> References: <20180209142228.21231-4-kirill.shutemov@linux.intel.com> <20180224214818.GD29374@pd.tnic> <20180225105205.xicklkl3n5azdw2j@node.shutemov.name> <20180226073552.xabt55ukp24inut5@gmail.com> <20180226080256.j7jzuxyokx42uytd@node.shutemov.name> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20180226080256.j7jzuxyokx42uytd@node.shutemov.name> User-Agent: Mutt/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 26, 2018 at 11:02:56AM +0300, Kirill A. Shutemov wrote: > Yeah, good idea. > > Borislav, could you check this? No joy with: diff --git a/arch/x86/boot/compressed/pgtable_64.c b/arch/x86/boot/compressed/pgtable_64.c index dad5da7b4c1a..4c382409b740 100644 --- a/arch/x86/boot/compressed/pgtable_64.c +++ b/arch/x86/boot/compressed/pgtable_64.c @@ -32,6 +32,7 @@ struct paging_config paging_prepare(void) (native_cpuid_ecx(7) & (1 << (X86_FEATURE_LA57 & 31)))) paging_config.l5_required = 1; +#if 0 /* * Find a suitable spot for the trampoline. * This code is based on reserve_bios_regions(). @@ -49,6 +50,9 @@ struct paging_config paging_prepare(void) /* Place the trampoline just below the end of low memory, aligned to 4k */ paging_config.trampoline_start = bios_start - TRAMPOLINE_32BIT_SIZE; paging_config.trampoline_start = round_down(paging_config.trampoline_start, PAGE_SIZE); +#else + paging_config.trampoline_start = 0x40000; +#endif trampoline = (unsigned long *)paging_config.trampoline_start; --- -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --