| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
The mixed mode thunking routine requires a part of it to be
mapped 1:1, and for this reason, we currently map the entire
kernel .text read/write in the EFI page tables, which is bad.
In fact, the kernel_map_pages_in_pgd() invocation that installs
this mapping is entirely redundant, since all of DRAM is already
1:1 mapped read/write in the EFI page tables when we reach this
point, which means that .rodata is mapped read-write as well.
So let's remap both .text and .rodata read-only in the EFI
page tables.
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
|
|
msm needs 5.5-rc4, go to the latest.
Signed-off-by: Dave Airlie <[email protected]>
|
|
On x86 we need to thunk through assembler stubs to call the EFI services
for mixed mode, and for runtime services in 64-bit mode. The assembler
stubs have limits on how many arguments it handles. Introduce a few
macros to check that we do not try to pass too many arguments to the
stubs.
Signed-off-by: Arvind Sankar <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Remove some code that is guaranteed to be unreachable, given
that we have already bailed by this time if EFI_OLD_MEMMAP is
set.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The logic in __efi_enter_virtual_mode() does a number of steps in
sequence, all of which may fail in one way or the other. In most
cases, we simply print an error and disable EFI runtime services
support, but in some cases, we BUG() or panic() and bring down the
system when encountering conditions that we could easily handle in
the same way.
While at it, replace a pointless page-to-virt-phys conversion with
one that goes straight from struct page to physical.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Clean up the efi_systab_init() routine which maps the EFI system
table and copies the relevant pieces of data out of it.
The current routine is very difficult to read, so let's clean that
up. Also, switch to a R/O mapping of the system table since that is
all we need.
Finally, use a plain u64 variable to record the physical address of
the system table instead of pointlessly stashing it in a struct efi
that is never used for anything else.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The routines efi_runtime_init32() and efi_runtime_init64() are
almost indistinguishable, and the only relevant difference is
the offset in the runtime struct from where to obtain the physical
address of the SetVirtualAddressMap() routine.
However, this address is only used once, when installing the virtual
address map that the OS will use to invoke EFI runtime services, and
at the time of the call, we will necessarily be running with a 1:1
mapping, and so there is no need to do the map/unmap dance here to
retrieve the address. In fact, in the preceding changes to these users,
we stopped using the address recorded here entirely.
So let's just get rid of all this code since it no longer serves a
purpose. While at it, tweak the logic so that we handle unsupported
and disable EFI runtime services in the same way, and unmap the EFI
memory map in both cases.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Calling 32-bit EFI runtime services from a 64-bit OS involves
switching back to the flat mapping with a stack carved out of
memory that is 32-bit addressable.
There is no need to actually execute the 64-bit part of this
routine from the flat mapping as well, as long as the entry
and return address fit in 32 bits. There is also no need to
preserve part of the calling context in global variables: we
can simply push the old stack pointer value to the new stack,
and keep the return address from the code32 section in EBX.
While at it, move the conditional check whether to invoke
the mixed mode version of SetVirtualAddressMap() into the
64-bit implementation of the wrapper routine.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The efi_call() wrapper used to invoke EFI runtime services serves
a number of purposes:
- realign the stack to 16 bytes
- preserve FP and CR0 register state
- translate from SysV to MS calling convention.
Preserving CR0.TS is no longer necessary in Linux, and preserving the
FP register state is also redundant in most cases, since efi_call() is
almost always used from within the scope of a pair of kernel_fpu_begin()/
kernel_fpu_end() calls, with the exception of the early call to
SetVirtualAddressMap() and the SGI UV support code.
So let's add a pair of kernel_fpu_begin()/_end() calls there as well,
and remove the unnecessary code from the assembly implementation of
efi_call(), and only keep the pieces that deal with the stack
alignment and the ABI translation.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The variadic efi_call_phys() wrapper that exists on i386 was
originally created to call into any EFI firmware runtime service,
but in practice, we only use it once, to call SetVirtualAddressMap()
during early boot.
The flexibility provided by the variadic nature also makes it
type unsafe, and makes the assembler code more complicated than
needed, since it has to deal with an unknown number of arguments
living on the stack.
So clean this up, by renaming the helper to efi_call_svam(), and
dropping the unneeded complexity. Let's also drop the reference
to the efi_phys struct and grab the address from the EFI system
table directly.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Split the phys_efi_set_virtual_address_map() routine into 32 and 64 bit
versions, so we can simplify them individually in subsequent patches.
There is very little overlap between the logic anyway, and this has
already been factored out in prolog/epilog routines which are completely
different between 32 bit and 64 bit. So let's take it one step further,
and get rid of the overlap completely.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
In a subsequent patch, we will fold the prolog/epilog routines that are
part of the support code to call SetVirtualAddressMap() with a 1:1
mapping into the callers. However, the 64-bit version mostly consists
of ugly mapping code that is only used when efi=old_map is in effect,
which is extremely rare. So let's move this code out of the way so it
does not clutter the common code.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Fix a couple of issues with the way we map and copy the vendor string:
- we map only 2 bytes, which usually works since you get at least a
page, but if the vendor string happens to cross a page boundary,
a crash will result
- only call early_memunmap() if early_memremap() succeeded, or we will
call it with a NULL address which it doesn't like,
- while at it, switch to early_memremap_ro(), and array indexing rather
than pointer dereferencing to read the CHAR16 characters.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: [email protected]
Fixes: 5b83683f32b1 ("x86: EFI runtime service support")
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
We use special wrapper routines to invoke firmware services in the
native case as well as the mixed mode case. For mixed mode, the need
is obvious, but for the native cases, we can simply rely on the
compiler to generate the indirect call, given that GCC now has
support for the MS calling convention (and has had it for quite some
time now). Note that on i386, the decompressor and the EFI stub are not
built with -mregparm=3 like the rest of the i386 kernel, so we can
safely allow the compiler to emit the indirect calls here as well.
So drop all the wrappers and indirection, and switch to either native
calls, or direct calls into the thunk routine for mixed mode.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: James Morse <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
We will soon remove another level of pointer casting, so let's make
sure all type handling involving firmware calls at boot time is correct.
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: James Morse <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
The ARM architecture does not permit combining 32-bit and 64-bit code
at the same privilege level, and so EFI mixed mode is strictly a x86
concept.
In preparation of turning the 32/64 bit distinction in shared stub
code to a native vs mixed one, refactor x86's current use of the
helper function efi_is_native() into efi_is_mixed().
Signed-off-by: Ard Biesheuvel <[email protected]>
Cc: Arvind Sankar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: James Morse <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
git://anongit.freedesktop.org/drm/drm-misc into drm-next
drm-misc-next for v5.6:
UAPI Changes:
- Add support for DMA-BUF HEAPS.
Cross-subsystem Changes:
- mipi dsi definition updates, pulled into drm-intel as well.
- Add lockdep annotations for dma_resv vs mmap_sem and fs_reclaim.
- Remove support for dma-buf kmap/kunmap.
- Constify fb_ops in all fbdev drivers, including drm drivers and drm-core, and media as well.
Core Changes:
- Small cleanups to ttm.
- Fix SCDC definition.
- Assorted cleanups to core.
- Add todo to remove load/unload hooks, and use generic fbdev emulation.
- Assorted documentation updates.
- Use blocking ww lock in ttm fault handler.
- Remove drm_fb_helper_fbdev_setup/teardown.
- Warning fixes with W=1 for atomic.
- Use drm_debug_enabled() instead of drm_debug flag testing in various drivers.
- Fallback to nontiled mode in fbdev emulation when not all tiles are present. (Later on reverted)
- Various kconfig indentation fixes in core and drivers.
- Fix freeing transactions in dp-mst correctly.
- Sean Paul is steping down as core maintainer. :-(
- Add lockdep annotations for atomic locks vs dma-resv.
- Prevent use-after-free for a bad job in drm_scheduler.
- Fill out all block sizes in the P01x and P210 definitions.
- Avoid division by zero in drm/rect, and fix bounds.
- Add drm/rect selftests.
- Add aspect ratio and alternate clocks for HDMI 4k modes.
- Add todo for drm_framebuffer_funcs and fb_create cleanup.
- Drop DRM_AUTH for prime import/export ioctls.
- Clear DP-MST payload id tables downstream when initializating.
- Fix for DSC throughput definition.
- Add extra FEC definitions.
- Fix fake offset in drm_gem_object_funs.mmap.
- Stop using encoder->bridge in core directly
- Handle bridge chaining slightly better.
- Add backlight support to drm/panel, and use it in many panel drivers.
- Increase max number of y420 modes from 128 to 256, as preparation to add the new modes.
Driver Changes:
- Small fixes all over.
- Fix documentation in vkms.
- Fix mmap_sem vs dma_resv in nouveau.
- Small cleanup in komeda.
- Add page flip support in gma500 for psb/cdv.
- Add ddc symlink in the connector sysfs directory for many drivers.
- Add support for analogic an6345, and fix small bugs in it.
- Add atomic modesetting support to ast.
- Fix radeon fault handler VMA race.
- Switch udl to use generic shmem helpers.
- Unconditional vblank handling for mcde.
- Miscellaneous fixes to mcde.
- Tweak debug output from komeda using debugfs.
- Add gamma and color transform support to komeda for DOU-IPS.
- Add support for sony acx424AKP panel.
- Various small cleanups to gma500.
- Use generic fbdev emulation in udl, and replace udl_framebuffer with generic implementation.
- Add support for Logic PD Type 28 panel.
- Use drm_panel_* wrapper functions in exynos/tegra/msm.
- Add devicetree bindings for generic DSI panels.
- Don't include drm_pci.h directly in many drivers.
- Add support for begin/end_cpu_access in udmabuf.
- Stop using drm_get_pci_dev in gma500 and mga200.
- Fixes to UDL damage handling, and use dma_buf_begin/end_cpu_access.
- Add devfreq thermal support to panfrost.
- Fix hotplug with daisy chained monitors by removing VCPI when disabling topology manager.
- meson: Add support for OSD1 plane AFBC commit.
- Stop displaying garbage when toggling ast primary plane on/off.
- More cleanups and fixes to UDL.
- Add D32 suport to komeda.
- Remove globle copy of drm_dev in gma500.
- Add support for Boe Himax8279d MIPI-DSI LCD panel.
- Add support for ingenic JZ4770 panel.
- Small null pointer deference fix in ingenic.
- Remove support for the special tfp420 driver, as there is a generic way to do it.
Signed-off-by: Daniel Vetter <[email protected]>
From: Maarten Lankhorst <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
|
|
The GMA500 driver is using the legacy GPIO API to fetch
three optional display control GPIO lines from the SFI
description used by the Medfield platform.
Switch this over to use GPIO descriptors and delete the
custom platform data.
We create three new static locals in the tc35876x bridge
code but it is hardly any worse than the I2C client static
local already there: I tried first to move it to the DRM
driver state container but there are workarounds for
probe order in the code so I just stayed off it, as the
result is unpredictable.
People wanting to do a more throrugh and proper cleanup
of the GMA500 driver can work on top of this, I can't
solve much more since I don't have access to the hardware,
I can only attempt to tidy up my GPIO corner.
Cc: Daniel Stone <[email protected]>
Cc: Daniel Vetter <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Acked-by: Patrik Jakobsson <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Linus Walleij <[email protected]>
|
|
Explicitly include asm/realmode.h, which is needed to handle a real mode
trampoline quirk in efi_free_boot_services(), instead of picking it up
by way of linux/acpi.h. acpi.h will soon stop including realmode.h so
that changing realmode.h doesn't require a full kernel rebuild.
Signed-off-by: Sean Christopherson <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Similarly to the previous patches by Sean Christopherson:
"Through a labyrinthian sequence of includes, usage of virt_to_phys() is
dependent on the include of asm/io.h in x86's asm/realmode.h, which is
included in x86's asm/acpi.h and thus by linux/acpi.h. Explicitly
include linux/io.h to break the dependency on realmode.h so that a
future patch can remove the realmode.h include from acpi.h without
breaking the build."
Reviewed-by: Andy Shevchenko <[email protected]>
Cc: Sean Christopherson <[email protected]>
Link: https://lkml.kernel.org/r/157475520975.21853.16355518818746065226.tip-bot2@tip-bot2
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Michael Weiser reported that he got this error during a kexec rebooting:
esrt: Unsupported ESRT version 2904149718861218184.
The ESRT memory stays in EFI boot services data, and it was reserved
in kernel via efi_mem_reserve(). The initial purpose of the reservation
is to reuse the EFI boot services data across kexec reboot. For example
the BGRT image data and some ESRT memory like Michael reported.
But although the memory is reserved it is not updated in the X86 E820 table,
and kexec_file_load() iterates system RAM in the IO resource list to find places
for kernel, initramfs and other stuff. In Michael's case the kexec loaded
initramfs overwrote the ESRT memory and then the failure happened.
Since kexec_file_load() depends on the E820 table being updated, just fix this
by updating the reserved EFI boot services memory as reserved type in E820.
Originally any memory descriptors with EFI_MEMORY_RUNTIME attribute are
bypassed in the reservation code path because they are assumed as reserved.
But the reservation is still needed for multiple kexec reboots,
and it is the only possible case we come here thus just drop the code
chunk, then everything works without side effects.
On my machine the ESRT memory sits in an EFI runtime data range, it does
not trigger the problem, but I successfully tested with BGRT instead.
both kexec_load() and kexec_file_load() work and kdump works as well.
[ mingo: Edited the changelog. ]
Reported-by: Michael Weiser <[email protected]>
Tested-by: Michael Weiser <[email protected]>
Signed-off-by: Dave Young <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"Core Frameworks:
- Add support for a "resource managed strongly uncachable ioremap"
call
- Provide a collection of MFD helper macros
- Remove mfd_clone_cell() from MFD core
- Add NULL de-reference protection in MFD core
- Remove superfluous function fd_platform_add_cell() from MFD core
- Honour Device Tree's request to disable a device
New Drivers:
- Add support for MediaTek MT6323 PMIC
New Device Support:
- Add support for Gemini Lake to Intel LPSS PCI
- Add support for Cherry Trail Crystal Cover PMIC to Intel SoC PMIC
CRC
- Add support for PM{I}8950 to Qualcomm SPMI PMIC
- Add support for U8420 to ST-Ericsson DB8500
- Add support for Comet Lake PCH-H to Intel LPSS PCI
New Functionality:
- Add support for requested supply clocks; madera-core
Fix-ups:
- Lower interrupt priority; rk808
- Use provided helpers (macros, group functions, defines); rk808,
ipaq-micro, ab8500-core, db8500-prcmu, mt6397-core, cs5535-mfd
- Only allocate IRQs on request; max77620
- Use simplified API; arizona-core
- Remove redundant and/or duplicated code; wm8998-tables, arizona,
syscon
- Device Tree binding fix-ups; madera, max77650, max77693
- Remove mfd_cell->id abuse hack; cs5535-mfd
- Remove only user of mfd_clone_cell(); cs5535-mfd
- Make resources static; rohm-bd70528
Bug Fixes:
- Fix product ID for RK818; rk808
- Fix Power Key; rk808
- Fix booting on the BananaPi; mt6397-core
- Endian fix-ups; twl.h
- Fix static error checker warnings; ti_am335x_tscadc"
* tag 'mfd-next-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (47 commits)
Revert "mfd: syscon: Set name of regmap_config"
mfd: ti_am335x_tscadc: Fix static checker warning
mfd: bd70528: Staticize bit value definitions
mfd: mfd-core: Honour Device Tree's request to disable a child-device
dt-bindings: mfd: max77693: Fix missing curly brace
mfd: intel-lpss: Add Intel Comet Lake PCH-H PCI IDs
mfd: db8500-prcmu: Support U8420-sysclk firmware
dt-bindings: mfd: max77650: Convert the binding document to yaml
mfd: mfd-core: Move pdev->mfd_cell creation back into mfd_add_device()
mfd: mfd-core: Remove usage counting for .{en,dis}able() call-backs
x86: olpc-xo1-sci: Remove invocation of MFD's .enable()/.disable() call-backs
x86: olpc-xo1-pm: Remove invocation of MFD's .enable()/.disable() call-backs
mfd: mfd-core: Remove mfd_clone_cell()
mfd: mfd-core: Protect against NULL call-back function pointer
mfd: cs5535-mfd: Register clients using their own dedicated MFD cell entries
mfd: cs5535-mfd: Request shared IO regions centrally
mfd: cs5535-mfd: Remove mfd_cell->id hack
mfd: cs5535-mfd: Use PLATFORM_DEVID_* defines and tidy error message
mfd: intel_soc_pmic_crc: Add "cht_crystal_cove_pmic" cell to CHT cells
mfd: madera: Add support for requesting the supply clocks
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These update the ACPICA code in the kernel to upstream revision
20191018, add support for EFI specific purpose memory, update the ACPI
EC driver to make it work on systems with hardware-reduced ACPI,
improve ACPI-based device enumeration for some platforms, rework the
lid blacklist handling in the button driver and add more lid quirks to
it, unify ACPI _HID/_UID matching, fix assorted issues and clean up
the code and documentation.
Specifics:
- Update the ACPICA code in the kernel to upstream revision 20191018
including:
* Fixes for Clang warnings (Bob Moore)
* Fix for possible overflow in get_tick_count() (Bob Moore)
* Introduction of acpi_unload_table() (Bob Moore)
* Debugger and utilities updates (Erik Schmauss)
* Fix for unloading tables loaded via configfs (Nikolaus Voss)
- Add support for EFI specific purpose memory to optionally allow
either application-exclusive or core-kernel-mm managed access to
differentiated memory (Dan Williams)
- Fix and clean up processing of the HMAT table (Brice Goglin, Qian
Cai, Tao Xu)
- Update the ACPI EC driver to make it work on systems with
hardware-reduced ACPI (Daniel Drake)
- Always build in support for the Generic Event Device (GED) to allow
one kernel binary to work both on systems with full hardware ACPI
and hardware-reduced ACPI (Arjan van de Ven)
- Fix the table unload mechanism to unregister platform devices
created when the given table was loaded (Andy Shevchenko)
- Rework the lid blacklist handling in the button driver and add more
lid quirks to it (Hans de Goede)
- Improve ACPI-based device enumeration for some platforms based on
Intel BayTrail SoCs (Hans de Goede)
- Add an OpRegion driver for the Cherry Trail Crystal Cove PMIC and
prevent handlers from being registered for unhandled PMIC OpRegions
(Hans de Goede)
- Unify ACPI _HID/_UID matching (Andy Shevchenko)
- Clean up documentation and comments (Cao jin, James Pack, Kacper
Piwiński)"
* tag 'acpi-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (52 commits)
ACPI: OSI: Shoot duplicate word
ACPI: HMAT: use %u instead of %d to print u32 values
ACPI: NUMA: HMAT: fix a section mismatch
ACPI: HMAT: don't mix pxm and nid when setting memory target processor_pxm
ACPI: NUMA: HMAT: Register "soft reserved" memory as an "hmem" device
ACPI: NUMA: HMAT: Register HMAT at device_initcall level
device-dax: Add a driver for "hmem" devices
dax: Fix alloc_dax_region() compile warning
lib: Uplevel the pmem "region" ida to a global allocator
x86/efi: Add efi_fake_mem support for EFI_MEMORY_SP
arm/efi: EFI soft reservation to memblock
x86/efi: EFI soft reservation to E820 enumeration
efi: Common enable/disable infrastructure for EFI soft reservation
x86/efi: Push EFI_MEMMAP check into leaf routines
efi: Enumerate EFI_MEMORY_SP
ACPI: NUMA: Establish a new drivers/acpi/numa/ directory
ACPICA: Update version to 20191018
ACPICA: debugger: remove leading whitespaces when converting a string to a buffer
ACPICA: acpiexec: initialize all simple types and field units from user input
ACPICA: debugger: add field unit support for acpi_db_get_next_token
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm updates from Ingo Molnar:
"The main changes in this cycle were:
- Cross-arch changes to move the linker sections for NOTES and
EXCEPTION_TABLE into the RO_DATA area, where they belong on most
architectures. (Kees Cook)
- Switch the x86 linker fill byte from x90 (NOP) to 0xcc (INT3), to
trap jumps into the middle of those padding areas instead of
sliding execution. (Kees Cook)
- A thorough cleanup of symbol definitions within x86 assembler code.
The rather randomly named macros got streamlined around a
(hopefully) straightforward naming scheme:
SYM_START(name, linkage, align...)
SYM_END(name, sym_type)
SYM_FUNC_START(name)
SYM_FUNC_END(name)
SYM_CODE_START(name)
SYM_CODE_END(name)
SYM_DATA_START(name)
SYM_DATA_END(name)
etc - with about three times of these basic primitives with some
label, local symbol or attribute variant, expressed via postfixes.
No change in functionality intended. (Jiri Slaby)
- Misc other changes, cleanups and smaller fixes"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits)
x86/entry/64: Remove pointless jump in paranoid_exit
x86/entry/32: Remove unused resume_userspace label
x86/build/vdso: Remove meaningless CFLAGS_REMOVE_*.o
m68k: Convert missed RODATA to RO_DATA
x86/vmlinux: Use INT3 instead of NOP for linker fill bytes
x86/mm: Report actual image regions in /proc/iomem
x86/mm: Report which part of kernel image is freed
x86/mm: Remove redundant address-of operators on addresses
xtensa: Move EXCEPTION_TABLE to RO_DATA segment
powerpc: Move EXCEPTION_TABLE to RO_DATA segment
parisc: Move EXCEPTION_TABLE to RO_DATA segment
microblaze: Move EXCEPTION_TABLE to RO_DATA segment
ia64: Move EXCEPTION_TABLE to RO_DATA segment
h8300: Move EXCEPTION_TABLE to RO_DATA segment
c6x: Move EXCEPTION_TABLE to RO_DATA segment
arm64: Move EXCEPTION_TABLE to RO_DATA segment
alpha: Move EXCEPTION_TABLE to RO_DATA segment
x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment
x86/vmlinux: Actually use _etext for the end of the text segment
vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform updates from Ingo Molnar:
"UV platform updates (with a 'hubless' variant) and Jailhouse updates
for better UART support"
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/jailhouse: Only enable platform UARTs if available
x86/jailhouse: Improve setup data version comparison
x86/platform/uv: Account for UV Hubless in is_uvX_hub Ops
x86/platform/uv: Check EFI Boot to set reboot type
x86/platform/uv: Decode UVsystab Info
x86/platform/uv: Add UV Hubbed/Hubless Proc FS Files
x86/platform/uv: Setup UV functions for Hubless UV Systems
x86/platform/uv: Add return code to UV BIOS Init function
x86/platform/uv: Return UV Hubless System Type
x86/platform/uv: Save OEM_ID from ACPI MADT probe
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek:
- Allow to print symbolic error names via new %pe modifier.
- Use pr_warn() instead of the remaining pr_warning() calls. Fix
formatting of the related lines.
- Add VSPRINTF entry to MAINTAINERS.
* tag 'printk-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk: (32 commits)
checkpatch: don't warn about new vsprintf pointer extension '%pe'
MAINTAINERS: Add VSPRINTF
tools lib api: Renaming pr_warning to pr_warn
ASoC: samsung: Use pr_warn instead of pr_warning
lib: cpu_rmap: Use pr_warn instead of pr_warning
trace: Use pr_warn instead of pr_warning
dma-debug: Use pr_warn instead of pr_warning
vgacon: Use pr_warn instead of pr_warning
fs: afs: Use pr_warn instead of pr_warning
sh/intc: Use pr_warn instead of pr_warning
scsi: Use pr_warn instead of pr_warning
platform/x86: intel_oaktrail: Use pr_warn instead of pr_warning
platform/x86: asus-laptop: Use pr_warn instead of pr_warning
platform/x86: eeepc-laptop: Use pr_warn instead of pr_warning
oprofile: Use pr_warn instead of pr_warning
of: Use pr_warn instead of pr_warning
macintosh: Use pr_warn instead of pr_warning
idsn: Use pr_warn instead of pr_warning
ide: Use pr_warn instead of pr_warning
crypto: n2: Use pr_warn instead of pr_warning
...
|
|
IO regions are now requested and released by this device's parent.
Signed-off-by: Lee Jones <[email protected]>
Reviewed-by: Daniel Thompson <[email protected]>
|
|
IO regions are now requested and released by this device's parent.
Signed-off-by: Lee Jones <[email protected]>
Reviewed-by: Daniel Thompson <[email protected]>
|
|
Given that EFI_MEMORY_SP is platform BIOS policy decision for marking
memory ranges as "reserved for a specific purpose" there will inevitably
be scenarios where the BIOS omits the attribute in situations where it
is desired. Unlike other attributes if the OS wants to reserve this
memory from the kernel the reservation needs to happen early in init. So
early, in fact, that it needs to happen before e820__memblock_setup()
which is a pre-requisite for efi_fake_memmap() that wants to allocate
memory for the updated table.
Introduce an x86 specific efi_fake_memmap_early() that can search for
attempts to set EFI_MEMORY_SP via efi_fake_mem and update the e820 table
accordingly.
The KASLR code that scans the command line looking for user-directed
memory reservations also needs to be updated to consider
"efi_fake_mem=nn@ss:0x40000" requests.
Acked-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Dave Hansen <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
|
|
UEFI 2.8 defines an EFI_MEMORY_SP attribute bit to augment the
interpretation of the EFI Memory Types as "reserved for a specific
purpose".
The proposed Linux behavior for specific purpose memory is that it is
reserved for direct-access (device-dax) by default and not available for
any kernel usage, not even as an OOM fallback. Later, through udev
scripts or another init mechanism, these device-dax claimed ranges can
be reconfigured and hot-added to the available System-RAM with a unique
node identifier. This device-dax management scheme implements "soft" in
the "soft reserved" designation by allowing some or all of the
reservation to be recovered as typical memory. This policy can be
disabled at compile-time with CONFIG_EFI_SOFT_RESERVE=n, or runtime with
efi=nosoftreserve.
This patch introduces 2 new concepts at once given the entanglement
between early boot enumeration relative to memory that can optionally be
reserved from the kernel page allocator by default. The new concepts
are:
- E820_TYPE_SOFT_RESERVED: Upon detecting the EFI_MEMORY_SP
attribute on EFI_CONVENTIONAL memory, update the E820 map with this
new type. Only perform this classification if the
CONFIG_EFI_SOFT_RESERVE=y policy is enabled, otherwise treat it as
typical ram.
- IORES_DESC_SOFT_RESERVED: Add a new I/O resource descriptor for
a device driver to search iomem resources for application specific
memory. Teach the iomem code to identify such ranges as "Soft Reserved".
Note that the comment for do_add_efi_memmap() needed refreshing since it
seemed to imply that the efi map might overflow the e820 table, but that
is not an issue as of commit 7b6e4ba3cb1f "x86/boot/e820: Clean up the
E820_X_MAX definition" that removed the 128 entry limit for
e820__range_add().
A follow-on change integrates parsing of the ACPI HMAT to identify the
node and sub-range boundaries of EFI_MEMORY_SP designated memory. For
now, just identify and reserve memory of this type.
Acked-by: Ard Biesheuvel <[email protected]>
Reported-by: kbuild test robot <[email protected]>
Reviewed-by: Dave Hansen <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
|
|
In preparation for adding another EFI_MEMMAP dependent call that needs
to occur before e820__memblock_setup() fixup the existing efi calls to
check for EFI_MEMMAP internally. This ends up being cleaner than the
alternative of checking EFI_MEMMAP multiple times in setup_arch().
Reviewed-by: Dave Hansen <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
|
|
As said in commit f2c2cbcc35d4 ("powerpc: Use pr_warn instead of
pr_warning"), removing pr_warning so all logging messages use a
consistent <prefix>_warn style. Let's do it.
Link: http://lkml.kernel.org/r/[email protected]
To: [email protected]
Cc: Ingo Molnar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Robert Richter <[email protected]>
Cc: Darren Hart <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Signed-off-by: Kefeng Wang <[email protected]>
Reviewed-by: Sergey Senozhatsky <[email protected]>
Signed-off-by: Petr Mladek <[email protected]>
|
|
These are all functions which are invoked from elsewhere, so annotate
them as global using the new SYM_FUNC_START and their ENDPROC's by
SYM_FUNC_END.
Now, ENTRY/ENDPROC can be forced to be undefined on X86, so do so.
Signed-off-by: Jiri Slaby <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Allison Randal <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Bill Metzenthen <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Darren Hart <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Herbert Xu <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: linux-efi <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Mark Rutland <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: [email protected]
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
|
|
These are all functions which are invoked from elsewhere, so annotate
them as global using the new SYM_FUNC_START and their ENDPROC's by
SYM_FUNC_END.
Make sure ENTRY/ENDPROC is not defined on X86_64, given these were the
last users.
Signed-off-by: Jiri Slaby <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Rafael J. Wysocki <[email protected]> [hibernate]
Reviewed-by: Boris Ostrovsky <[email protected]> [xen bits]
Acked-by: Herbert Xu <[email protected]> [crypto]
Cc: Allison Randal <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Armijn Hemel <[email protected]>
Cc: Cao jin <[email protected]>
Cc: Darren Hart <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Enrico Weigelt <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Herbert Xu <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jim Mattson <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: kvm ML <[email protected]>
Cc: Len Brown <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: linux-efi <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Mark Rutland <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Cc: "Radim Krčmář" <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Stefano Stabellini <[email protected]>
Cc: "Steven Rostedt (VMware)" <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: Wanpeng Li <[email protected]>
Cc: Wei Huang <[email protected]>
Cc: x86-ml <[email protected]>
Cc: [email protected]
Cc: Xiaoyao Li <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
|
|
All these are functions which are invoked from elsewhere but they are
not typical C functions. So annotate them using the new SYM_CODE_START.
All these were not balanced with any END, so mark their ends by
SYM_CODE_END appropriately too.
Signed-off-by: Jiri Slaby <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Boris Ostrovsky <[email protected]> [xen bits]
Acked-by: Rafael J. Wysocki <[email protected]> [power mgmt]
Cc: Andy Shevchenko <[email protected]>
Cc: Cao jin <[email protected]>
Cc: Darren Hart <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Pavel Machek <[email protected]>
Cc: Pingfan Liu <[email protected]>
Cc: [email protected]
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Stefano Stabellini <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Wei Huang <[email protected]>
Cc: x86-ml <[email protected]>
Cc: [email protected]
Cc: Xiaoyao Li <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
|
|
There are a couple of assembly functions which are invoked only locally
in the file they are defined. In C, they are marked "static". In
assembly, annotate them using SYM_{FUNC,CODE}_START_LOCAL (and switch
their ENDPROC to SYM_{FUNC,CODE}_END too). Whether FUNC or CODE is used,
depends on whether ENDPROC or END was used for a particular function
before.
Signed-off-by: Jiri Slaby <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Darren Hart <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: [email protected]
Cc: linux-efi <[email protected]>
Cc: [email protected]
Cc: Matt Fleming <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Cc: Stefano Stabellini <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: x86-ml <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
|
|
Use the new SYM_DATA_START_LOCAL, and SYM_DATA_END* macros to get:
0000 8 OBJECT LOCAL DEFAULT 6 gdt
0008 32 OBJECT LOCAL DEFAULT 6 gdt_start
0028 0 OBJECT LOCAL DEFAULT 6 gdt_end
0028 256 OBJECT LOCAL DEFAULT 6 early_stack
0128 0 OBJECT LOCAL DEFAULT 6 early_stack
Signed-off-by: Jiri Slaby <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Boris Ostrovsky <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Darren Hart <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Stefano Stabellini <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: x86-ml <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
|
|
kexec reboot fails randomly in UEFI based KVM guest. The firmware
just resets while calling efi_delete_dummy_variable(); Unfortunately
I don't know how to debug the firmware, it is also possible a potential
problem on real hardware as well although nobody reproduced it.
The intention of the efi_delete_dummy_variable is to trigger garbage collection
when entering virtual mode. But SetVirtualAddressMap can only run once
for each physical reboot, thus kexec_enter_virtual_mode() is not necessarily
a good place to clean a dummy object.
Drop the efi_delete_dummy_variable so that kexec reboot can work.
Signed-off-by: Dave Young <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Acked-by: Matthew Garrett <[email protected]>
Cc: Ben Dooks <[email protected]>
Cc: Jarkko Sakkinen <[email protected]>
Cc: Jerry Snitselaar <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Lukas Wunner <[email protected]>
Cc: Lyude Paul <[email protected]>
Cc: Octavian Purdila <[email protected]>
Cc: Peter Jones <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Scott Talbert <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
Add a return code to the UV BIOS init function that indicates the
successful initialization of the kernel/BIOS callback interface.
Signed-off-by: Mike Travis <[email protected]>
Reviewed-by: Steve Wahl <[email protected]>
Reviewed-by: Dimitri Sivanich <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Hedi Berriche <[email protected]>
Cc: Justin Ernst <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Russ Anderson <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg Kroah-Hartman:
"Here is the big driver core update for 5.4-rc1.
There was a bit of a churn in here, with a number of core and OF
platform patches being added to the tree, and then after much
discussion and review and a day-long in-person meeting, they were
decided to be reverted and a new set of patches is currently being
reviewed on the mailing list.
Other than that churn, there are two "persistent" branches in here
that other trees will be pulling in as well during the merge window.
One branch to add support for drivers to have the driver core
automatically add sysfs attribute files when a driver is bound to a
device so that the driver doesn't have to manually do it (and then
clean it up, as it always gets it wrong).
There's another branch in here for generic lookup helpers for the
driver core that lots of busses are starting to use. That's the
majority of the non-driver-core changes in this patch series.
There's also some on-going debugfs file creation cleanup that has been
slowly happening over the past few releases, with the goal to
hopefully get that done sometime next year.
All of these have been in linux-next for a while now with no reported
issues"
[ Note that the above-mentioned generic lookup helpers branch was
already brought in by the LED merge (commit 4feaab05dc1e) that had
shared it.
Also note that that common branch introduced an i2c bug due to a bad
conversion, which got fixed here. - Linus ]
* tag 'driver-core-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (49 commits)
coccinelle: platform_get_irq: Fix parse error
driver-core: add include guard to linux/container.h
sysfs: add BIN_ATTR_WO() macro
driver core: platform: Export platform_get_irq_optional()
hwmon: pwm-fan: Use platform_get_irq_optional()
driver core: platform: Introduce platform_get_irq_optional()
Revert "driver core: Add support for linking devices during device addition"
Revert "driver core: Add edit_links() callback for drivers"
Revert "of/platform: Add functional dependency link from DT bindings"
Revert "driver core: Add sync_state driver/bus callback"
Revert "of/platform: Pause/resume sync state during init and of_platform_populate()"
Revert "of/platform: Create device links for all child-supplier depencencies"
Revert "of/platform: Don't create device links for default busses"
Revert "of/platform: Fix fn definitons for of_link_is_valid() and of_link_property()"
Revert "of/platform: Fix device_links_supplier_sync_state_resume() warning"
Revert "of/platform: Disable generic device linking code for PowerPC"
devcoredump: fix typo in comment
devcoredump: use memory_read_from_buffer
of/platform: Disable generic device linking code for PowerPC
device.h: Fix warnings for mismatched parameter names in comments
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform update from Ingo Molnar:
"The biggest change is the rework of the intel/iosf_mbi locking code
which used a few non-standard locking patterns, to make it work under
lockdep"
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/platform/uv: Fix kmalloc() NULL check routine
x86/platform/intel/iosf_mbi Rewrite locking
|
|
The result of kmalloc() should have been checked ahead of below statement:
pqp = (struct bau_pq_entry *)vp;
Move BUG_ON(!vp) before above statement.
Signed-off-by: Austin Kim <[email protected]>
Cc: Dimitri Sivanich <[email protected]>
Cc: Hedi Berriche <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mike Travis <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Russ Anderson <[email protected]>
Cc: Steve Wahl <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/20190905232951.GA28779@LGEARND20B15
Signed-off-by: Ingo Molnar <[email protected]>
|
|
There are 2 problems with the old iosf PMIC I2C bus arbritration code which
need to be addressed:
1. The lockdep code complains about a possible deadlock in the
iosf_mbi_[un]block_punit_i2c_access code:
[ 6.712662] ======================================================
[ 6.712673] WARNING: possible circular locking dependency detected
[ 6.712685] 5.3.0-rc2+ #79 Not tainted
[ 6.712692] ------------------------------------------------------
[ 6.712702] kworker/0:1/7 is trying to acquire lock:
[ 6.712712] 00000000df1c5681 (iosf_mbi_block_punit_i2c_access_count_mutex){+.+.}, at: iosf_mbi_unblock_punit_i2c_access+0x13/0x90
[ 6.712739]
but task is already holding lock:
[ 6.712749] 0000000067cb23e7 (iosf_mbi_punit_mutex){+.+.}, at: iosf_mbi_block_punit_i2c_access+0x97/0x186
[ 6.712768]
which lock already depends on the new lock.
[ 6.712780]
the existing dependency chain (in reverse order) is:
[ 6.712792]
-> #1 (iosf_mbi_punit_mutex){+.+.}:
[ 6.712808] __mutex_lock+0xa8/0x9a0
[ 6.712818] iosf_mbi_block_punit_i2c_access+0x97/0x186
[ 6.712831] i2c_dw_acquire_lock+0x20/0x30
[ 6.712841] i2c_dw_set_reg_access+0x15/0xb0
[ 6.712851] i2c_dw_probe+0x57/0x473
[ 6.712861] dw_i2c_plat_probe+0x33e/0x640
[ 6.712874] platform_drv_probe+0x38/0x80
[ 6.712884] really_probe+0xf3/0x380
[ 6.712894] driver_probe_device+0x59/0xd0
[ 6.712905] bus_for_each_drv+0x84/0xd0
[ 6.712915] __device_attach+0xe4/0x170
[ 6.712925] bus_probe_device+0x9f/0xb0
[ 6.712935] deferred_probe_work_func+0x79/0xd0
[ 6.712946] process_one_work+0x234/0x560
[ 6.712957] worker_thread+0x50/0x3b0
[ 6.712967] kthread+0x10a/0x140
[ 6.712977] ret_from_fork+0x3a/0x50
[ 6.712986]
-> #0 (iosf_mbi_block_punit_i2c_access_count_mutex){+.+.}:
[ 6.713004] __lock_acquire+0xe07/0x1930
[ 6.713015] lock_acquire+0x9d/0x1a0
[ 6.713025] __mutex_lock+0xa8/0x9a0
[ 6.713035] iosf_mbi_unblock_punit_i2c_access+0x13/0x90
[ 6.713047] i2c_dw_set_reg_access+0x4d/0xb0
[ 6.713058] i2c_dw_probe+0x57/0x473
[ 6.713068] dw_i2c_plat_probe+0x33e/0x640
[ 6.713079] platform_drv_probe+0x38/0x80
[ 6.713089] really_probe+0xf3/0x380
[ 6.713099] driver_probe_device+0x59/0xd0
[ 6.713109] bus_for_each_drv+0x84/0xd0
[ 6.713119] __device_attach+0xe4/0x170
[ 6.713129] bus_probe_device+0x9f/0xb0
[ 6.713140] deferred_probe_work_func+0x79/0xd0
[ 6.713150] process_one_work+0x234/0x560
[ 6.713160] worker_thread+0x50/0x3b0
[ 6.713170] kthread+0x10a/0x140
[ 6.713180] ret_from_fork+0x3a/0x50
[ 6.713189]
other info that might help us debug this:
[ 6.713202] Possible unsafe locking scenario:
[ 6.713212] CPU0 CPU1
[ 6.713221] ---- ----
[ 6.713229] lock(iosf_mbi_punit_mutex);
[ 6.713239] lock(iosf_mbi_block_punit_i2c_access_count_mutex);
[ 6.713253] lock(iosf_mbi_punit_mutex);
[ 6.713265] lock(iosf_mbi_block_punit_i2c_access_count_mutex);
[ 6.713276]
*** DEADLOCK ***
In practice can never happen because only the first caller which
increments iosf_mbi_block_punit_i2c_access_count will also take
iosf_mbi_punit_mutex, that is the whole purpose of the counter, which
itself is protected by iosf_mbi_block_punit_i2c_access_count_mutex.
But there is no way to tell the lockdep code about this and we really
want to be able to run a kernel with lockdep enabled without these
warnings being triggered.
2. The lockdep warning also points out another real problem, if 2 threads
both are in a block of code protected by iosf_mbi_block_punit_i2c_access
and the first thread to acquire the block exits before the second thread
then the second thread will call mutex_unlock on iosf_mbi_punit_mutex,
but it is not the thread which took the mutex and unlocking by another
thread is not allowed.
Fix this by getting rid of the notion of holding a mutex for the entire
duration of the PMIC accesses, be it either from the PUnit side, or from an
in kernel I2C driver. In general holding a mutex after exiting a function
is a bad idea and the above problems show this case is no different.
Instead 2 counters are now used, one for PMIC accesses from the PUnit
and one for accesses from in kernel I2C code. When access is requested
now the code will wait (using a waitqueue) for the counter of the other
type of access to reach 0 and on release, if the counter reaches 0 the
wakequeue is woken.
Note that the counter approach is necessary to allow nested calls.
The main reason for this is so that a series of i2c transfers can be done
with the punit blocked from accessing the bus the whole time. This is
necessary to be able to safely read/modify/write a PMIC register without
racing with the PUNIT doing the same thing.
Allowing nested iosf_mbi_block_punit_i2c_access() calls also is desirable
from a performance pov since the whole dance necessary to block the PUnit
from accessing the PMIC I2C bus is somewhat expensive.
Signed-off-by: Hans de Goede <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
|
|
System firmware advertises the address of the 'Runtime
Configuration Interface table version 2 (RCI2)' via
an EFI Configuration Table entry. This code retrieves the RCI2
table from the address and exports it to sysfs as a binary
attribute 'rci2' under /sys/firmware/efi/tables directory.
The approach adopted is similar to the attribute 'DMI' under
/sys/firmware/dmi/tables.
RCI2 table contains BIOS HII in XML format and is used to populate
BIOS setup page in Dell EMC OpenManage Server Administrator tool.
The BIOS setup page contains BIOS tokens which can be configured.
Signed-off-by: Narendra K <[email protected]>
Reviewed-by: Mario Limonciello <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
|
|
The SAL systab is an Itanium specific EFI configuration table, so
move its handling into arch/ia64 where it belongs.
Signed-off-by: Ard Biesheuvel <[email protected]>
|
|
The SGI UV UEFI machines are tightly coupled to the x86 architecture
so there is no need to keep any awareness of its existence in the
generic EFI layer, especially since we already have the infrastructure
to handle arch-specific configuration tables, and were even already
using it to some extent.
Signed-off-by: Ard Biesheuvel <[email protected]>
|
|
The function efi_is_table_address() and the associated array of table
pointers is specific to x86. Since we will be adding some more x86
specific tables, let's move this code out of the generic code first.
Signed-off-by: Ard Biesheuvel <[email protected]>
|
|
Platform drivers now have the option to have the platform core create
and remove any needed sysfs attribute files. So take advantage of that
and do not register "by hand" a lid sysfs file.
Cc: Darren Hart <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: [email protected]
Cc: [email protected]
Acked-by: Andy Shevchenko <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
|
|
git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver updates from Andy Shevchenko:
"Gathered a bunch of x86 platform driver changes. It's rather big,
since includes two big refactors and completely new driver:
- ASUS WMI driver got a big refactoring in order to support the TUF
Gaming laptops. Besides that, the regression with backlight being
permanently off on various EeePC laptops has been fixed.
- Accelerometer on HP ProBook 450 G0 shows wrong measurements due to
X axis being inverted. This has been fixed.
- Intel PMC core driver has been extended to be ACPI enumerated if
the DSDT provides device with _HID "INT33A1". This allows to
convert the driver to be pure platform and support new hardware
purely based on ACPI DSDT.
- From now on the Intel Speed Select Technology is supported thru a
corresponding driver. This driver provides an access to the
features of the ISST, such as Performance Profile, Core Power, Base
frequency and Turbo Frequency.
- Mellanox platform drivers has been refactored and now extended to
support more systems, including new coming ones.
- The OLPC XO-1.75 platform is now supported.
- CB4063 Beckhoff Automation board is using PMC clocks, provided via
pmc_atom driver, for ethernet controllers in a way that they can't
be managed by the clock driver. The quirk has been extended to
cover this case.
- Touchscreen on Chuwi Hi10 Plus tablet has been enabled. Meanwhile
the information of Chuwi Hi10 Air has been fixed to cover more
models based on the same platform.
- Xiaomi notebooks have WMI interface enabled. Thus, the driver to
support it has been provided. It required some extension of the
generic WMI library, which allows to propagate opaque context to
the ->probe() of the individual drivers.
This release includes debugfs clean up from Greg KH for several
drivers that drop return code check and make debugfs absence or
failure non-fatal.
Also miscellaneous fixes here and there, mostly for Acer WMI and
various Intel drivers"
* tag 'platform-drivers-x86-v5.3-1' of git://git.infradead.org/linux-platform-drivers-x86: (74 commits)
platform/x86: Fix PCENGINES_APU2 Kconfig warning
tools/power/x86/intel-speed-select: Add .gitignore file
platform/x86: mlx-platform: Fix error handling in mlxplat_init()
platform/x86: intel_pmc_core: Attach using APCI HID "INT33A1"
platform/x86: intel_pmc_core: transform Pkg C-state residency from TSC ticks into microseconds
platform/x86: asus-wmi: Use dev_get_drvdata()
Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces
platform/x86: mlx-platform: Add more reset cause attributes
platform/x86: mlx-platform: Modify DMI matching order
platform/x86: mlx-platform: Add regmap structure for the next generation systems
platform/x86: mlx-platform: Change API for i2c-mlxcpld driver activation
platform/x86: mlx-platform: Move regmap initialization before all drivers activation
MAINTAINERS: Update for Intel Speed Select Technology
tools/power/x86: A tool to validate Intel Speed Select commands
platform/x86: ISST: Restore state on resume
platform/x86: ISST: Add Intel Speed Select PUNIT MSR interface
platform/x86: ISST: Add Intel Speed Select mailbox interface via MSRs
platform/x86: ISST: Add Intel Speed Select mailbox interface via PCI
platform/x86: ISST: Add Intel Speed Select mmio interface
platform/x86: ISST: Add IOCTL to Translate Linux logical CPU to PUNIT CPU number
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and debugfs updates from Greg KH:
"Here is the "big" driver core and debugfs changes for 5.3-rc1
It's a lot of different patches, all across the tree due to some api
changes and lots of debugfs cleanups.
Other than the debugfs cleanups, in this set of changes we have:
- bus iteration function cleanups
- scripts/get_abi.pl tool to display and parse Documentation/ABI
entries in a simple way
- cleanups to Documenatation/ABI/ entries to make them parse easier
due to typos and other minor things
- default_attrs use for some ktype users
- driver model documentation file conversions to .rst
- compressed firmware file loading
- deferred probe fixes
All of these have been in linux-next for a while, with a bunch of
merge issues that Stephen has been patient with me for"
* tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (102 commits)
debugfs: make error message a bit more verbose
orangefs: fix build warning from debugfs cleanup patch
ubifs: fix build warning after debugfs cleanup patch
driver: core: Allow subsystems to continue deferring probe
drivers: base: cacheinfo: Ensure cpu hotplug work is done before Intel RDT
arch_topology: Remove error messages on out-of-memory conditions
lib: notifier-error-inject: no need to check return value of debugfs_create functions
swiotlb: no need to check return value of debugfs_create functions
ceph: no need to check return value of debugfs_create functions
sunrpc: no need to check return value of debugfs_create functions
ubifs: no need to check return value of debugfs_create functions
orangefs: no need to check return value of debugfs_create functions
nfsd: no need to check return value of debugfs_create functions
lib: 842: no need to check return value of debugfs_create functions
debugfs: provide pr_fmt() macro
debugfs: log errors when something goes wrong
drivers: s390/cio: Fix compilation warning about const qualifiers
drivers: Add generic helper to match by of_node
driver_find_device: Unify the match function with class_find_device()
bus_find_device: Unify the match callback with class_find_device
...
|