From: Ard Biesheuvel <ardb@kernel.org>
To: linux-efi@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: Ard Biesheuvel <ardb@kernel.org>,
linux-kernel@vger.kernel.org,
Arvind Sankar <nivedita@alum.mit.edu>,
Atish Patra <atish.patra@wdc.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Zou Wei <zou_wei@huawei.com>
Subject: [PATCH 02/33] efi/libstub: Make initrd file loader configurable
Date: Fri, 24 Apr 2020 15:05:00 +0200 [thread overview]
Message-ID: <20200424130531.30518-3-ardb@kernel.org> (raw)
In-Reply-To: <20200424130531.30518-1-ardb@kernel.org>
Loading an initrd passed via the kernel command line is deprecated: it
is limited to files that reside in the same volume as the one the kernel
itself was loaded from, and we have more flexible ways to achieve the
same. So make it configurable so new architectures can decide not to
enable it.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
drivers/firmware/efi/Kconfig | 11 ++++++++
drivers/firmware/efi/libstub/efistub.h | 38 ++++++++++++++++++++------
drivers/firmware/efi/libstub/file.c | 32 +++++-----------------
3 files changed, 47 insertions(+), 34 deletions(-)
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index 2a2b2b96a1dc..4e788dd55b03 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -124,6 +124,17 @@ config EFI_ARMSTUB_DTB_LOADER
functionality for bootloaders that do not have such support
this option is necessary.
+config EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER
+ bool "Enable the command line initrd loader"
+ depends on EFI_GENERIC_STUB
+ default y
+ help
+ Select this config option to add support for the initrd= command
+ line parameter, allowing an initrd that resides on the same volume
+ as the kernel image to be loaded into memory.
+
+ This method is deprecated.
+
config EFI_BOOTLOADER_CONTROL
tristate "EFI Bootloader Control"
depends on EFI_VARS
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 67d26949fd26..7517683b31e9 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -651,15 +651,35 @@ efi_status_t efi_parse_options(char const *cmdline);
efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
unsigned long size);
-efi_status_t efi_load_dtb(efi_loaded_image_t *image,
- unsigned long *load_addr,
- unsigned long *load_size);
-
-efi_status_t efi_load_initrd(efi_loaded_image_t *image,
- unsigned long *load_addr,
- unsigned long *load_size,
- unsigned long soft_limit,
- unsigned long hard_limit);
+efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
+ const efi_char16_t *optstr,
+ int optstr_size,
+ unsigned long soft_limit,
+ unsigned long hard_limit,
+ unsigned long *load_addr,
+ unsigned long *load_size);
+
+
+static inline efi_status_t efi_load_dtb(efi_loaded_image_t *image,
+ unsigned long *load_addr,
+ unsigned long *load_size)
+{
+ return handle_cmdline_files(image, L"dtb=", sizeof(L"dtb=") - 2,
+ ULONG_MAX, ULONG_MAX, load_addr, load_size);
+}
+
+static inline efi_status_t efi_load_initrd(efi_loaded_image_t *image,
+ unsigned long *load_addr,
+ unsigned long *load_size,
+ unsigned long soft_limit,
+ unsigned long hard_limit)
+{
+ if (!IS_ENABLED(CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER))
+ return EFI_SUCCESS;
+
+ return handle_cmdline_files(image, L"initrd=", sizeof(L"initrd=") - 2,
+ soft_limit, hard_limit, load_addr, load_size);
+}
efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
unsigned long *load_size,
diff --git a/drivers/firmware/efi/libstub/file.c b/drivers/firmware/efi/libstub/file.c
index ea66b1f16a79..27e014ea4459 100644
--- a/drivers/firmware/efi/libstub/file.c
+++ b/drivers/firmware/efi/libstub/file.c
@@ -121,13 +121,13 @@ static int find_file_option(const efi_char16_t *cmdline, int cmdline_len,
* We only support loading a file from the same filesystem as
* the kernel image.
*/
-static efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
- const efi_char16_t *optstr,
- int optstr_size,
- unsigned long soft_limit,
- unsigned long hard_limit,
- unsigned long *load_addr,
- unsigned long *load_size)
+efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
+ const efi_char16_t *optstr,
+ int optstr_size,
+ unsigned long soft_limit,
+ unsigned long hard_limit,
+ unsigned long *load_addr,
+ unsigned long *load_size)
{
const efi_char16_t *cmdline = image->load_options;
int cmdline_len = image->load_options_size / 2;
@@ -239,21 +239,3 @@ static efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
efi_free(alloc_size, alloc_addr);
return status;
}
-
-efi_status_t efi_load_dtb(efi_loaded_image_t *image,
- unsigned long *load_addr,
- unsigned long *load_size)
-{
- return handle_cmdline_files(image, L"dtb=", sizeof(L"dtb=") - 2,
- ULONG_MAX, ULONG_MAX, load_addr, load_size);
-}
-
-efi_status_t efi_load_initrd(efi_loaded_image_t *image,
- unsigned long *load_addr,
- unsigned long *load_size,
- unsigned long soft_limit,
- unsigned long hard_limit)
-{
- return handle_cmdline_files(image, L"initrd=", sizeof(L"initrd=") - 2,
- soft_limit, hard_limit, load_addr, load_size);
-}
--
2.17.1
next prev parent reply other threads:[~2020-04-24 13:06 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-24 13:04 [GIT PULL 00/33] EFI updates for v5.8 Ard Biesheuvel
2020-04-24 13:04 ` [PATCH 01/33] efi/libstub: Move arm-stub to a common file Ard Biesheuvel
2020-04-24 13:05 ` Ard Biesheuvel [this message]
2020-04-24 13:15 ` [PATCH 02/33] efi/libstub: Make initrd file loader configurable Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 03/33] efi/libstub: Unify EFI call wrappers for non-x86 Ard Biesheuvel
2020-05-03 15:09 ` Guenter Roeck
2020-05-03 16:09 ` Arvind Sankar
2020-05-03 16:11 ` Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 04/33] efi/libstub/arm: Make install_memreserve_table static Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 05/33] efi/gop: Remove redundant current_fb_base Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 06/33] efi/gop: Move check for framebuffer before con_out Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 07/33] efi/gop: Get mode information outside the loop Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 08/33] efi/gop: Factor out locating the gop into a function Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 09/33] efi/gop: Slightly re-arrange logic of find_gop Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 10/33] efi/gop: Move variable declarations into loop block Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 11/33] efi/gop: Use helper macros for populating lfb_base Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 12/33] efi/gop: Use helper macros for find_bits Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 13/33] efi/gop: Remove unreachable code from setup_pixel_info Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 14/33] efi/gop: Add prototypes for query_mode and set_mode Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 15/33] efi/gop: Allow specifying mode number on command line Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 16/33] efi/gop: Allow specifying mode by <xres>x<yres> Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 17/33] efi/gop: Allow specifying depth as well as resolution Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 18/33] efi/gop: Allow automatically choosing the best mode Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 19/33] efi/libstub/random: Align allocate size to EFI_ALLOC_ALIGN Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 20/33] efi/libstub/random: Increase random alloc granularity Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 21/33] efi/libstub/arm64: Replace 'preferred' offset with alignment check Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 22/33] efi/libstub/arm64: Simplify randomized loading of kernel image Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 23/33] efi/libstub: Add API function to allocate aligned memory Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 24/33] efi/libstub/arm64: Switch to ordinary page allocator for kernel image Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 25/33] efi/libstub: Move efi_relocate_kernel() into separate source file Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 26/33] efi/arm: Remove __efistub_global annotation Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 27/33] efi/x86: Remove __efistub_global and add relocation check Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 28/33] efi: Kill __efistub_global Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 29/33] efi/libstub: Drop __pure getter for efi_system_table Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 30/33] efi/libstub: Drop __pure getters for EFI stub options Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 31/33] efi/libstub/x86: Avoid getter function for efi_is64 Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 32/33] efi: Clean up config table description arrays Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 33/33] efi: Move arch_tables check to caller Ard Biesheuvel
2020-04-25 8:27 ` [GIT PULL 00/33] EFI updates for v5.8 Ingo Molnar
2020-04-25 9:57 ` Ard Biesheuvel
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