Tom Rini [Thu, 4 Jul 2024 22:11:08 +0000 (16:11 -0600)]
Merge patch series "xtensa: Enable qemu-xtensa board"
Jiaxun Yang <jiaxun.yang@flygoat.com> says:
Hi all,
This series enabled qemu-xtensa board.
For dc232b CPU it needs to be built with toolchain[1].
This is a side product of me investigating architectures
physical address != virtual address in U-Boot. Now we can
get it covered under CI and regular tests.
VirtIO devices are not working as expected, due to U-Boot's
assumption on VA == PA everywhere, I'm going to get this fixed
later.
My Xtensa knowledge is pretty limited, Xtensa people please
feel free to point out if I got anything wrong.
Tom Rini [Thu, 27 Jun 2024 13:43:20 +0000 (07:43 -0600)]
CI: Make pytest export JUnitXML
Both GitLab and Azure (and other CI systems) have native support for
displaying JUnitXML test report results. The pytest framework that we
use can generate these reports. Change our CI tests so that they will
generate these reports and then have the respective CI platform pick
them up. We write to different locations because of where each CI is
(and isn't) able to easily pass things along.
Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com>
Tom Rini [Tue, 18 Jun 2024 20:23:43 +0000 (14:23 -0600)]
test/py/tests: Update some network dependencies
On tests which require "tftpboot" we need to depend not on cmd_net but
rather cmd_tftpboot. And on tests which require cmd_pxe we do not need
to also depend on cmd_net as this should be handled already via Kconfig
logic.
Simon Glass [Sun, 23 Jun 2024 20:30:33 +0000 (14:30 -0600)]
smbios: Correct error handling when writing tables
Since write_smbios_table() returns an address, we cannot use it to
return and error number. Also, failing on sysinfo_detect() breaks
existing boards, e.g. chromebook_link
Correct this by logging and swallowing the error.
Signed-off-by: Simon Glass <sjg@chromium.org> Fixes: a5a57562856 ("lib: smbios: Detect system properties via...")
Simon Glass [Sun, 23 Jun 2024 20:30:30 +0000 (14:30 -0600)]
test: Decode exceptions only with sandbox
When a real board fails we don't want to decode the exception. Reserve
that behaviour for sandbox. Also avoid raising a new exception on
failure - just re-raise the existing one.
Simon Glass [Sun, 23 Jun 2024 20:30:27 +0000 (14:30 -0600)]
test: Make bootstd init run only on sandbox
Tests for standard boot need disks to be set up, which can only be done
on sandbox, since adjusting disks on real hardware is not currently
supported. Mark the init function as sandbox-only.
Tom Rini [Wed, 3 Jul 2024 20:44:12 +0000 (14:44 -0600)]
Merge patch series "cmd: avoid duplicate weak functions"
Heinrich Schuchardt <heinrich.schuchardt@canonical.com> says:
[trini: Patch 1/3 was replaced by my series merged just prior to this,
Heinrich's cover letter is lightly edited and any mistakes are my own]
If we have multiple weak implementations of functions, the linker might
choose any of these.
The EFI sub-systems uses invalidate_icache_all() after loading binaries.
Both the EFI sub-system and cmd/cache.c provide a weak
invalidate_icache_all() function. Remove the EFI instance.
For ARM11 functional implementation of invalidate_icache_all is missing.
Add it.
If multiple weak implementations of a weak function exist, it is unclear
which one the linker should chose. cmd/cache.c already defines a weak
invalidate_icache_all().
We don't need a call to invalidate_icache_all() on x86.
ARM, RISC-V, and Sandbox provide an implementation.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
In EFI sub-system we rely on invalidate_icache_all() to invalidate the
instruction cache after loading binaries. Add the missing implementation on
ARM1136, ARM1176.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Tom Rini [Wed, 3 Jul 2024 20:42:11 +0000 (14:42 -0600)]
Merge patch series "m68k: Implement a default flush_dcache_all"
Tom Rini <trini@konsulko.com> says:
Prior to this series we had some de-facto required cache functions that
were either unimplemented on some architectures or differently named.
This would lead in some cases to having multiple "weak" functions
available as well. Rework things so that an architecture must provide
these functions and it is up to that architecture if a "weak" default
function makes sense, or not.
Tom Rini [Wed, 19 Jun 2024 21:27:59 +0000 (15:27 -0600)]
cmd: cache: Remove weak functions
It should be up to an architecture to decide how to implement cache
functions, and if they need to use weak functions or not. Allowing the
cache command to be built without cache functionality implemented is
unhelpful. Further, guard the call to noncached_set_region with
CONFIG_SYS_NONCACHED_MEMORY as that's when it's implemented and again is
an architecture specific detail.
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Tom Rini <trini@konsulko.com>
Tom Rini [Wed, 19 Jun 2024 21:27:57 +0000 (15:27 -0600)]
powerpc: Implement a default flush_dcache_all
Implement a weak default version of flush_dcache_all which is based on
the ARM default, which is to flush the entire range via
flush_dcache_range(...).
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Tom Rini <trini@konsulko.com>
Tom Rini [Wed, 19 Jun 2024 21:27:55 +0000 (15:27 -0600)]
sh: Implement a default flush_dcache_all
Implement a weak default version of flush_dcache_all which is based on
the ARM default, which is to flush the entire range via
flush_dcache_range(...).
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Tom Rini <trini@konsulko.com>
Tom Rini [Wed, 19 Jun 2024 21:27:53 +0000 (15:27 -0600)]
m68k: Implement a default flush_dcache_all
Implement a weak default version of flush_dcache_all which is based on
the ARM default, which is to flush the entire range via
flush_dcache_range(...).
bootstd: cros: store partition type in an efi_guid_t
The scan_part() function uses a struct uuid to store the little-endian
partition type GUID, but this structure should be used only to contain a
big-endian UUID. Use an efi_guid_t instead.
Simon Glass [Sun, 23 Jun 2024 17:56:21 +0000 (11:56 -0600)]
u_boot_pylib: Use correct coverage tool within venv
When running within a Python venv we must use the 'coverage' tool (which
is within the venv) so that the venv packages are used in preference to
system packages. Otherwise the coverage tests run in a different
environment from the normal tests and may fail due to missing packages.
Handle this by detecting the venv and changing the tool name.
Signed-off-by: Simon Glass <sjg@chromium.org> Suggested-by: Tom Rini <trini@konsulko.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Simon Glass [Sun, 23 Jun 2024 17:55:15 +0000 (11:55 -0600)]
buildman: Add a way to limit the number of buildmans
Buildman uses all available CPUs by default, so running more than one or
two concurrent processes is not normally useful.
However in some CI cases we want to be able to run several jobs at once
to save time. For example, in a lab situation we may want to run a test
on 20 boards at a time, since only the build step actually takes much
CPU.
Add an option which allows such a limit. When buildman starts up, it
waits until the number of running processes goes below the limit, then
claims a spot in the list. The list is maintained with a temporary file.
Note that the temp file is user-specific, since it is hard to create a
locked temporary file which can be accessed by any user. In most cases,
only one user is running jobs on a machine, so this should not matter.
Simon Glass [Sun, 23 Jun 2024 17:55:13 +0000 (11:55 -0600)]
buildman: Add a flag to force mrproper on failure
When a file is removed by a commit (e.g. include/common.h yay!) it can
cause incremental build failures since one of the dependency files from
a previous build may mention the file.
Add an option to run 'make mrproper' automatically when a build fails.
This can be used to automatically resolve the problem, without always
adding the large overhead of 'make mrproper' to every build.
Simon Glass [Sun, 23 Jun 2024 17:55:06 +0000 (11:55 -0600)]
binman: Support an assumed size for missing binaries
Binman has a the useful feature of handling missing external blobs
gracefully, including allowing them to be missing, deciding whether the
resulting image is functional or not and faking blobs when this is
necessary for particular tools (e.g. mkimage).
This feature is widely used in CI. One drawback is that if U-Boot grows
too large to fit along with the required blobs, then this is not
discovered until someone does a 'real' build which includes the blobs.
Add a 'assume-size' property to entries to allow Binman to reserve a
given size for missing external blobs.
Simon Glass [Sun, 23 Jun 2024 17:55:02 +0000 (11:55 -0600)]
binman: efi: Correct entry docs
Somehow the class documentation has got out of sync with the generated
entries.rst file. Regenerating it causes errors, so correct these and
regenerate the entries.rst file.
Signed-off-by: Simon Glass <sjg@chromium.org> Fixes: 809f28e7213 ("binman: capsule: Use dumped capsule header...")
Ilias Apalodimas [Tue, 18 Jun 2024 17:28:20 +0000 (20:28 +0300)]
configs: enable setvariable at runtime on sandbox
We currently don't have any boards enabling CONFIG_EFI_RT_VOLATILE_STORE.
We do have EFI selftests testing the feature though, so enable it in
all the sandbox platforms and test the functionality properly
Ilias Apalodimas [Mon, 17 Jun 2024 15:14:18 +0000 (18:14 +0300)]
sandbox: cleanup linker scripts and sections
commit 6e2228fb052b ("Merge patch series "Clean up arm linker scripts"")
was cleaning up linker scripts for armv7 and v8 in a similar fashion.
Several commits in the past -- e.g
commit d0b5d9da5de2 ("arm: make _end compiler-generated")
was moving symbols to be compiler generated. They were defined as c
variables in its own section to force the compiler emit relative a
reference. However, defining those in the linker script will do the
same thing since [0].
So let's remove the special sections from the linker scripts, the
variable definitions from sections.c, and define them as a symbols.
It's worth noting that the linker was discarding the symbols in the
older binary completely since the symbol definition had an extra _.
- new binary
$~ aarch64-linux-gnu-readelf -sW u-boot | grep efi_runtim
246: 000000000004acbe 13 FUNC LOCAL DEFAULT 14 vbe_req_efi_runtime_rand
3198: 0000000000318690 16 OBJECT LOCAL DEFAULT 29 efi_runtime_mmio
6359: 00000000000dedff 217 FUNC LOCAL DEFAULT 14 efi_runtime_relocate
7942: 00000000003074c0 136 OBJECT GLOBAL HIDDEN 29 efi_runtime_services
8869: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_rel_stop
9159: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_stop
9410: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_start
10137: 00000000005981bd 0 NOTYPE WEAK HIDDEN 33 efi_runtime.c.de5bed54
10470: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_rel_start
- old binary
$~ aarch64-linux-gnu-readelf -sW u-boot.old | grep efi_runtim
246: 000000000004acbe 13 FUNC LOCAL DEFAULT 14 vbe_req_efi_runtime_rand
3198: 0000000000318690 16 OBJECT LOCAL DEFAULT 29 efi_runtime_mmio
6359: 00000000000dedff 221 FUNC LOCAL DEFAULT 14 efi_runtime_relocate
7942: 00000000003074c0 136 OBJECT GLOBAL HIDDEN 29 efi_runtime_services
10135: 0000000000598320 0 NOTYPE WEAK HIDDEN 33 efi_runtime.c.de5bed54
$~ bloat-o-meter u-bool.old u-boot
add/remove: 0/0 grow/shrink: 1/1 up/down: 7/-4 (3)
Function old new delta
efi_memory_init 343 350 +7
efi_runtime_relocate 221 217 -4
Total: Before=2009902, After=2009905, chg +0.00%
[0] binutils commit 6b3b0ab89663 ("Make linker assigned symbol dynamic only for shared object")
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> # sandbox_defconfig on amd64, arm64, riscv64 Reviewed-by: Simon Glass <sjg@chromium.org> Fixes: commit aac53d3d96a2 ("sandbox: Rename EFI runtime sections") Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Quentin Schulz [Tue, 11 Jun 2024 13:04:26 +0000 (15:04 +0200)]
dm: core: migrate debug() messages to use dm_warn
Prior to that, seeing the debug() messages required to enable DM_DEBUG
which defines DEBUG (and then _DEBUG) which in turn makes failing
assert() calls reset U-Boot which isn't necessarily what is desired.
Instead, let's migrate to dm_warn which is using log_debug when unset or
log_warn when set.
While at it, reword the DM_DEBUG symbol in Kconfig to explain what it
now actually does.
Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: Simon Glass <sjg@chromium.org>
Quentin Schulz [Tue, 11 Jun 2024 13:04:25 +0000 (15:04 +0200)]
dm: core: fix signedness in debug messages
outp always point to an unsigned type in ofnode_read_u* functions but
the format specifier is currently always using signed type.
This is an issue since the signed type can only contain half of the
unsigned type values above 0.
However, this now breaks another usecase. Indeed,
ofnode_read_s32_default is actually passing an s32 but it'll be printed
as a u32 instead. But since the function is called u32, it makes more
sense to have it print an unsigned value.
This was discovered because arm,smc-id = <0x82000010>; on RK3588S is
above the max signed value and therefore would return a negative signed
decimal value instead of its proper unsigned one.
Fixes: fa12dfa08a7b ("dm: core: support reading a single indexed u64 value") Fixes: 4bb7075c830c ("dm: core: support reading a single indexed u32 value") Fixes: 7e5196c409f1 ("dm: core: Add ofnode function to read a 64-bit int") Fixes: 9e51204527dc ("dm: core: Add operations on device tree references") Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: Simon Glass <sjg@chromium.org>
Quentin Schulz [Tue, 11 Jun 2024 13:04:24 +0000 (15:04 +0200)]
dm: core: fix misleading debug message when matching compatible
A driver can have multiple compatible. When the id->compatible matches
for that driver, the first compatible supported by the driver is
currently returned, which gives the following confusing message:
- found match at 'rk3588_syscon': 'rockchip,rk3588-sys-grf' matches 'rockchip,rk3588-pmugrf'
Considering that the compatible passed in argument is necessarily the
one that exactly matched to enter this code path, there's no need to do
some elaborate logic, just print the driver name and the compatible
passed in argument.
Fixes: d3e773613b6d ("dm: core: Use U-Boot logging instead of pr_debug()") Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: Simon Glass <sjg@chromium.org>
Rasmus Villemoes [Mon, 27 May 2024 20:04:17 +0000 (22:04 +0200)]
global_data.h: drop write-only field dm_root_f
The dm_root_f field seems to be entirely write-only and hence
redundant, unless 'git grep' fails to find some access generated via
preprocessor token concatenation or similar.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Reviewed-by: Simon Glass <sjg@chromium.org>
Jonathan Liu [Sat, 25 May 2024 08:10:53 +0000 (18:10 +1000)]
sandbox: enable support for the unlz4 command
This does not work with sandbox at present. Fix it up to use map_sysmem()
to convert an address to a pointer.
Signed-off-by: Jonathan Liu <net147@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Fix conflict and reformat to 80cols: Signed-off-by: Simon Glass <sjg@chromium.org>
Sean Anderson [Fri, 19 Apr 2024 02:36:32 +0000 (22:36 -0400)]
patman: Add a tag for when a patch gets added to a series
When a patch is added to a series after the initial version, there are no
changes to note except that it is new. This is typically done to suppress
the "(no changes in vN)" message. It's also nice to add a change to the
cover letter so reviewers know there is an additional patch. Add a tag to
automate this process a bit.
There are two nits with the current approach:
- It favors '-' as a bullet point, but some people may prefer '*' (or
something else)
- Tags (e.g. 'patman: ' in 'patman: foo bar') are not stripped. They are
probably just noise in most series, but they may be useful for treewide
series to distinguish 'gpio: frobnicate' from 'reset: frobnicate', so
I've left them in.
Suggestions for the above appreciated.
Suggested-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Douglas Anderson <dianders@chromium.org>
Sean Anderson [Fri, 19 Apr 2024 02:36:31 +0000 (22:36 -0400)]
patman: Add Commit-cc as an alias for Patch-cc
Most tags referring to commits (or patches) are named Commit-something. The
exception is Patch-cc. Add a Commit-cc alias so we can use whichever one is
convenient.
Sean Anderson [Fri, 19 Apr 2024 02:36:30 +0000 (22:36 -0400)]
patman: Fix tests if add_maintainers is set to False
If add_maintainers is set to False in the user's ~/.patman config, it will
cause the custom_get_maintainer_script to fail since that test expects
maintainers to be added. Set add_maintainer to True in the .patman config
to prevent this.
Fixes: 8c042fb7f9f ("patman: add '--get-maintainer-script' argument") Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
We should have a single place where we write the default value to the
creator revision field. If we ever will have any table created by another
tool, we can overwrite the value afterwards.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
When writing an executable, allowing other users to modify it introduces
a security issue.
Generally we should avoid giving other users write access to our files by
default.
Replace chmod(777) by chmod(755) and chmod(644).
Fixes: 47f5fcfb4169 ("sandbox: Add os_jump_to_image() to run another executable") Fixes: d9165153caea ("sandbox: add flags for open() call") Fixes: 5c2859cdc302 ("sandbox: Allow reading/writing of RAM buffer") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Sean Anderson <seanga2@gmail.com>
Martin Kurbanov [Sun, 16 Jun 2024 13:34:18 +0000 (16:34 +0300)]
cmd: ubi: check 'updating' before calling ubi_more_update_data()
If 0 is passed to the 'bytes' parameter in the ubi_start_update(),
there is no need to call the ubi_more_update_data(). Otherwise,
there will be a double-free of 'vol->upd_buf'.
Also check that the ubi_start_update() was called before calling
the ubi_more_update_data().
Signed-off-by: Martin Kurbanov <mmkurbanov@salutedevices.com>
Tom Rini [Mon, 1 Jul 2024 01:03:14 +0000 (19:03 -0600)]
Revert "Merge patch series "zlib: Address CVE-2016-9841""
This series brings our zlib code more up to date. However, it drops an
important performance improvement that is required on some of our
supported platforms in order to boot Linux before the watchdog resets
the system. Furthermore, the "post increment" version of this
performance loop was not tested, so while we can fix it, it would then
require re-testing all platforms. At this point in time, we will revert
updating zlib (which has had a potential security issue since 2016) and
fix this in the v2024.10 release.
Tom Rini [Sun, 30 Jun 2024 16:59:42 +0000 (10:59 -0600)]
Merge tag 'efi-2024-10-rc1' of https://source.denx.de/u-boot/custodians/u-boot-efi into next
Pull request efi-2024-10-rc1
Documentation:
Update requirements.txt to use current Python module versions
Add a page describing debugging U-Boot with GDB
FIT: describe data-size as a conditionally mandatory property
Correct link to FIT specification in SPL code.
Correct kaslrseed command long text description
UEFI:
Add unit test checking that don't have kaslr-seed when measuring boot
Deduplicate code for measured boot.
Alexander Dahl [Wed, 26 Jun 2024 10:47:18 +0000 (12:47 +0200)]
doc: develop: Add a general section on gdb usage
Mashed up from different sources linked below, including the now gone
Wiki and doc/README.arm-relocation file. Tested on a custom board with
AT91 SAMA5D2 SoC and Segger J-Link Base adapter. This is only generic
advice here, the usage is not board specific. Some board docs have more
specific instructions on using gdb with a particular board.
Bastian Germann [Mon, 24 Jun 2024 17:00:38 +0000 (19:00 +0200)]
doc: fit: Make data-size a conditionally mandatory property
Before 9d0750064e (doc: Move external FIT docs into the main body), the
FIT property data-size was not a mandatory property and still it is not
expected to be set alongside the data property.
Move the data-size property to the "Conditionally mandatory property"
section, where it actually belongs.
Signed-off-by: Bastian Germann <bage@debian.org> Reviewed-by: Simon Glass <sjg@chromium.org>
Ilias Apalodimas [Sun, 23 Jun 2024 11:48:18 +0000 (14:48 +0300)]
tpm: allow the user to select the compiled algorithms
Simon reports that after enabling all algorithms on the TPM some boards
fail since they don't have enough storage to accommodate the ~5KB growth.
The choice of hash algorithms is determined by the platform and the TPM
configuration. Failing to cap a PCR in a bank which the platform left
active is a security vulnerability. It might allow unsealing of secrets
if an attacker can replay a good set of measurements into an unused bank.
If MEASURED_BOOT or EFI_TCG2_PROTOCOL is enabled our Kconfig will enable
all supported hashing algorithms. We still want to allow users to add a
TPM and not enable measured boot via EFI or bootm though and at the same
time, control the compiled algorithms for size reasons.
So let's add a function tpm2_allow_extend() which checks the TPM active
PCRs banks against the one U-Boot was compiled with. We only allow
extending PCRs if the algorithms selected during build match the TPM
configuration.
It's worth noting that this is only added for TPM2.0, since TPM1.2 is
lacking a lot of code at the moment to read the available PCR banks.
We unconditionally enable SHA1 when a TPM is selected, which is the only
hashing algorithm v1.2 supports.
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> # chromebook-link
Ilias Apalodimas [Sun, 23 Jun 2024 11:48:17 +0000 (14:48 +0300)]
tpm: Untangle tpm2_get_pcr_info()
This function was used on measured boot to retrieve the number of active
PCR banks and was designed to work with the TCG protocols.
Since we now have the need to retrieve the active PCRs outside the
measured boot context -- e.g use the in the command line, decouple the
function.
Create one that will only adheres to TCG TSS2.0 [0] specification called
tpm2_get_pcr_info() which can be used by the TPM2.0 APIs and a new one that
is called from the measured boot context called tcg2_get_pcr_info()
Ilias Apalodimas [Sun, 23 Jun 2024 11:48:14 +0000 (14:48 +0300)]
tpm: Move TCG headers into a separate file
commit 97707f12fdab ("tpm: Support boot measurements") moved out code
from the EFI subsystem into the TPM one to support measurements when
booting with !EFI.
Those were moved directly into the TPM subsystem and in the tpm-v2.c
library. In hindsight, it would have been better to move it in new
files since the TCG2 is governed by its own spec, it's overeall cleaner
and also easier to enable certain parts of the TPM functionality.
So let's start moving the headers in a new file containing the TCG
specific bits.
Ilias Apalodimas [Sun, 23 Jun 2024 11:48:13 +0000 (14:48 +0300)]
efi_loader: remove unused TCG algo definitions
commit 97707f12fdab ("tpm: Support boot measurements") moved some of the
EFI TCG code to the TPM subsystem. Those definitions are now in tpm-v2.h.
Let's remove the stale entries
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Tom Rini [Fri, 28 Jun 2024 23:31:28 +0000 (17:31 -0600)]
Merge patch series "automatically add /chosen/kaslr-seed and deduplicate code"
Tim Harvey <tharvey@gateworks.com> says:
This series will automatically add /chosen/kaslr-seed to the dt if
DM_RNG is enabled
during the boot process.
If RANDOMIZE_BASE is enabled in the Linux kernel instructing it to
randomize the virtual address at which the kernel image is loaded, it
expects entropy to be provided by the bootloader by populating
/chosen/kaslr-seed with a 64-bit value from source of entropy at boot.
If we have DM_RNG enabled populate this value automatically when
fdt_chosen is called. We skip this if ARMV8_SEC_FIRMWARE_SUPPORT
is enabled as its implementation uses a different source of entropy
that is not yet implemented as DM_RNG. We also skip this if
MEASURED_BOOT is enabled as in that case any modifications to the
dt will cause measured boot to fail (although there are many other
places the dt is altered).
As this fdt node is added elsewhere create a library function and
use it to deduplicate code. We will provide a parameter to overwrite
the node if present.
For our automatic injection, we will use the first rng device and
not overwrite if already present with a non-zero value (which may
have been populated by an earlier boot stage). This way if a board
specific ft_board_setup() function wants to customize this behavior
it can call fdt_kaslrseed with a rng device index of its choosing and
set overwrite true.
Note that the kalsrseed command (CMD_KASLRSEED) is likely pointless now
but left in place in case boot scripts exist that rely on this command
existing and returning success. An informational message is printed to
alert users of this command that it is likely no longer needed.
Note that the Kernel's EFI STUB only relies on EFI_RNG_PROTOCOL for
randomization and completely ignores the kaslr-seed for its own
randomness needs (i.e the randomization of the physical placement of
the kernel). It gets weeded out from the DTB that gets handed over via
efi_install_fdt() as it would also mess up the measured boot DTB TPM
measurements as well.
Tim Harvey [Tue, 18 Jun 2024 21:06:09 +0000 (14:06 -0700)]
test: cmd: fdt: fix chosen test for DM_RNG
Now that kaslr-seed is automatically added to the chosen node if DM_RNG
is enabled, adjust the test to expect this.
Take care not to expect kaslr-seed for CONFIG_MEASURED_BOOT and
CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT as we do not add it for those.
Signed-off-by: Tim Harvey <tharvey@gateworks.com> Cc: Michal Simek <michal.simek@amd.com> Cc: Andy Yan <andy.yan@rock-chips.com> Cc: Akash Gajjar <gajjar04akash@gmail.com> Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org> Cc: Simon Glass <sjg@chromium.org> Cc: Patrick Delaunay <patrick.delaunay@foss.st.com> Cc: Patrice Chotard <patrice.chotard@foss.st.com> Cc: Devarsh Thakkar <devarsht@ti.com> Cc: Heinrich Schuchardt <xypron.glpk@gmx.de> Cc: Hugo Villeneuve <hvilleneuve@dimonoff.com> Cc: Marek Vasut <marex@denx.de> Cc: Tom Rini <trini@konsulko.com> Cc: Chris Morgan <macromorgan@hotmail.com>
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