Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753886AbaAKUto (ORCPT ); Sat, 11 Jan 2014 15:49:44 -0500 Received: from mail.skyhub.de ([78.46.96.112]:56798 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751986AbaAKUtk (ORCPT ); Sat, 11 Jan 2014 15:49:40 -0500 From: Borislav Petkov To: Linux EFI , LKML Cc: Borislav Petkov , Matt Fleming , Matthew Garrett , "H. Peter Anvin" , Dave Young , Toshi Kani Subject: [PATCH 2/4] efi: Dump the EFI page table Date: Sat, 11 Jan 2014 21:49:28 +0100 Message-Id: <1389473370-1940-3-git-send-email-bp@alien8.de> X-Mailer: git-send-email 1.8.5.2.192.g7794a68 In-Reply-To: <1389473370-1940-1-git-send-email-bp@alien8.de> References: <1389473370-1940-1-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 d62ec87a2b26..c34be4ce94c9 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -54,6 +54,7 @@ #include #define EFI_DEBUG +#undef EFI_PGT_DBG #define EFI_MIN_RESERVE 5120 @@ -818,6 +819,15 @@ void efi_memory_uc(u64 addr, unsigned long size) set_memory_uc(addr, npages); } +static void dump_pagetable(void) +{ +#if defined(EFI_PGT_DBG) && 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; @@ -1033,6 +1043,7 @@ void __init efi_enter_virtual_mode(void) efi_setup_page_tables(); efi_sync_low_kernel_mappings(); + dump_pagetable(); if (!efi_setup) { status = phys_efi_set_virtual_address_map( -- 1.8.5.2.192.g7794a68 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/