From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751848Ab3LPXgp (ORCPT ); Mon, 16 Dec 2013 18:36:45 -0500 Received: from mail.skyhub.de ([78.46.96.112]:44153 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750939Ab3LPXgn (ORCPT ); Mon, 16 Dec 2013 18:36:43 -0500 From: Borislav Petkov To: Linux EFI , X86 ML , LKML Cc: Borislav Petkov , Matt Fleming , Matthew Garrett , "H. Peter Anvin" , Dave Young , James Bottomley , Vivek Goyal , Toshi Kani , Arjan van de Ven Subject: [PATCH 2/3] efi: Dump the EFI page table Date: Tue, 17 Dec 2013 00:36:36 +0100 Message-Id: <1387236997-26975-3-git-send-email-bp@alien8.de> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1387236997-26975-1-git-send-email-bp@alien8.de> References: <1387236997-26975-1-git-send-email-bp@alien8.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov This is very useful for debugging issues with the recently added pagetable switching code for EFI virtual mode. Signed-off-by: Borislav Petkov --- arch/x86/platform/efi/efi.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 7d8caccbf2f3..51d6285701e9 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -740,6 +740,15 @@ void efi_memory_uc(u64 addr, unsigned long size) set_memory_uc(addr, npages); } +static void efi_dump_pagetable(void) +{ +#if defined(EFI_DEBUG) && defined(CONFIG_X86_PTDUMP) + pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); + + walk_pgd_level(NULL, pgd); +#endif +} + void __init old_map_region(efi_memory_desc_t *md) { u64 start_pfn, end_pfn, end; @@ -869,6 +878,8 @@ void __init efi_enter_virtual_mode(void) efi_setup_page_tables(); efi_sync_low_kernel_mappings(); + efi_dump_pagetable(); + status = phys_efi_set_virtual_address_map( memmap.desc_size * count, memmap.desc_size, -- 1.8.4