linux-stable/drivers/base
Pierre Gondois f0b58720f2 cacheinfo: Check sib_leaf in cache_leaves_are_shared()
[ Upstream commit 7a306e3eab ]

If there is no ACPI/DT information, it is assumed that L1 caches
are private and L2 (and higher) caches are shared. A cache is
'shared' between two CPUs if it is accessible from these two
CPUs.

Each CPU owns a representation (i.e. has a dedicated cacheinfo struct)
of the caches it has access to. cache_leaves_are_shared() tries to
identify whether two representations are designating the same actual
cache.

In cache_leaves_are_shared(), if 'this_leaf' is a L2 cache (or higher)
and 'sib_leaf' is a L1 cache, the caches are detected as shared as
only this_leaf's cache level is checked.
This is leads to setting sib_leaf as being shared with another CPU,
which is incorrect as this is a L1 cache.

Check 'sib_leaf->level'. Also update the comment as the function is
called when populating 'shared_cpu_map'.

Fixes: f16d1becf9 ("cacheinfo: Use cache identifiers to check if the caches are shared if available")
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230414081453.244787-2-pierre.gondois@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-05-11 23:03:29 +09:00
..
firmware_loader
power PM: domains: fix memory leak with using debugfs_lookup() 2023-03-10 09:33:52 +01:00
regmap regmap: apply reg_base and reg_downshift for single register ops 2023-03-10 09:33:19 +01:00
test driver core: Fix test_async_probe_init saves device in wrong array 2023-02-01 08:34:26 +01:00
arch_numa.c
arch_topology.c RISC-V Patches for the 6.1 Merge Window, Part 1 2022-10-09 13:24:01 -07:00
attribute_container.c
auxiliary.c
base.h
bus.c
cacheinfo.c cacheinfo: Check sib_leaf in cache_leaves_are_shared() 2023-05-11 23:03:29 +09:00
class.c class: fix possible memory leak in __class_register() 2022-12-31 13:32:38 +01:00
component.c drivers: base: component: fix memory leak with using debugfs_lookup() 2023-03-11 13:55:39 +01:00
container.c
core.c driver core: fw_devlink: Avoid spurious error message 2023-03-10 09:34:01 +01:00
cpu.c tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem 2023-05-11 23:03:01 +09:00
dd.c driver core: Don't require dynamic_debug for initcall_debug probe timing 2023-05-01 08:26:27 +09:00
devcoredump.c
devres.c
devtmpfs.c
driver.c
firmware.c
hypervisor.c
init.c
isa.c
Kconfig
Makefile
map.c
memory.c
module.c
node.c - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
physical_location.c driver core: location: Free struct acpi_pld_info *pld before return false 2023-03-10 09:33:33 +01:00
physical_location.h
pinctrl.c
platform-msi.c
platform.c
property.c device property: fix of node refcount leak in fwnode_graph_get_next_endpoint() 2023-02-01 08:34:26 +01:00
soc.c
swnode.c
syscore.c
topology.c
trace.c
trace.h
transport_class.c drivers: base: transport_class: fix resource leak when transport_add_device() fails 2023-03-10 09:33:34 +01:00