linux-kernel - [tip:efi/core] efi/arm*: Perform hardware compatibility check

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Message-ID: <tip-b9d6769b5678dbd6cb328d20716561d35b2b1510@git.kernel.org>
Date:	Mon, 22 Feb 2016 04:16:31 -0800
From:	tip-bot for Ard Biesheuvel <tipbot@...or.com>@zytor.com
To:	linux-tip-commits@...r.kernel.org@...or.com
Cc:	mingo@...nel.org, mark.rutland@....com, hpa@...or.com,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	jeremy.linton@....com, tglx@...utronix.de,
	matt@...eblueprint.co.uk, suzuki.poulose@....com,
	ard.biesheuvel@...aro.org, torvalds@...ux-foundation.org
Subject: [tip:efi/core] efi/arm*: Perform hardware compatibility check

Commit-ID:  b9d6769b5678dbd6cb328d20716561d35b2b1510
Gitweb:     http://git.kernel.org/tip/b9d6769b5678dbd6cb328d20716561d35b2b1510
Author:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
AuthorDate: Wed, 17 Feb 2016 12:36:03 +0000
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 22 Feb 2016 08:26:27 +0100

efi/arm*: Perform hardware compatibility check

Before proceeding with relocating the kernel and parsing the command line,
insert a call to check_platform_features() to allow an arch specific check
to be performed whether the current kernel can execute on the current
hardware.

Tested-by: Suzuki K Poulose <suzuki.poulose@....com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Signed-off-by: Matt Fleming <matt@...eblueprint.co.uk>
Reviewed-by: Jeremy Linton <jeremy.linton@....com>
Acked-by: Mark Rutland <mark.rutland@....com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-efi@...r.kernel.org
Link: http://lkml.kernel.org/r/1455712566-16727-11-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 drivers/firmware/efi/libstub/arm-stub.c | 4 ++++
 drivers/firmware/efi/libstub/efistub.h  | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c
index 3397902..6086a87 100644
--- a/drivers/firmware/efi/libstub/arm-stub.c
+++ b/drivers/firmware/efi/libstub/arm-stub.c
@@ -190,6 +190,10 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,
 
 	pr_efi(sys_table, "Booting Linux Kernel...\n");
 
+	status = check_platform_features(sys_table);
+	if (status != EFI_SUCCESS)
+		goto fail;
+
 	/*
 	 * Get a handle to the loaded image protocol.  This is used to get
 	 * information about the running image, such as size and the command
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 86ff7bf..981c603 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -53,4 +53,6 @@ void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
 		     unsigned long desc_size, efi_memory_desc_t *runtime_map,
 		     int *count);
 
+efi_status_t check_platform_features(efi_system_table_t *sys_table_arg);
+
 #endif