linux/drivers/base
Yicong Yang 5c2712387d cacheinfo: Fix LLC is not exported through sysfs
After entering 6.3-rc1 the LLC cacheinfo is not exported on our ACPI
based arm64 server. This is because the LLC cacheinfo is partly reset
when secondary CPUs boot up. On arm64 the primary cpu will allocate
and setup cacheinfo:
init_cpu_topology()
  for_each_possible_cpu()
    fetch_cache_info() // Allocate cacheinfo and init levels
detect_cache_attributes()
  cache_shared_cpu_map_setup()
    if (!last_level_cache_is_valid()) // not valid, setup LLC
      cache_setup_properties() // setup LLC

On secondary CPU boot up:
detect_cache_attributes()
  populate_cache_leaves()
    get_cache_type() // Get cache type from clidr_el1,
                     // for LLC type=CACHE_TYPE_NOCACHE
  cache_shared_cpu_map_setup()
    if (!last_level_cache_is_valid()) // Valid and won't go to this branch,
                                      // leave LLC's type=CACHE_TYPE_NOCACHE

The last_level_cache_is_valid() use cacheinfo->{attributes, fw_token} to
test it's valid or not, but populate_cache_leaves() will only reset
LLC's type, so we won't try to re-setup LLC's type and leave it
CACHE_TYPE_NOCACHE and won't export it through sysfs.

This patch tries to fix this by not re-populating the cache leaves if
the LLC is valid.

Fixes: 5944ce092b ("arch_topology: Build cacheinfo from primary CPU")
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20230328114915.33340-1-yangyicong@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-29 12:04:10 +02:00
..
firmware_loader Kbuild updates for v6.2 2022-12-19 12:33:32 -06:00
power We have one small patch to the clk core this time around. It fixes a corner 2023-02-25 15:16:23 -08:00
regmap Merge remote-tracking branch 'regmap/for-6.3' into regmap-next 2023-02-17 02:14:50 +00:00
test Merge 6.2-rc5 into driver-core-next 2023-01-22 12:56:55 +01:00
arch_numa.c mm: percpu: add generic pcpu_populate_pte() function 2022-01-20 08:52:52 +02:00
arch_topology.c arch_topology: Build cacheinfo from primary CPU 2023-01-18 09:58:40 +00:00
attribute_container.c driver core: attribute_container: fix W=1 warnings 2021-05-14 13:37:10 +02:00
auxiliary.c driver core: make struct bus_type.uevent() take a const * 2023-01-27 13:45:52 +01:00
base.h Revert "devtmpfs: remove return value of devtmpfs_delete_node()" 2023-02-14 09:01:21 +01:00
bus.c driver core: bus: Handle early calls to bus_to_subsys() 2023-02-25 10:51:21 +01:00
cacheinfo.c cacheinfo: Fix LLC is not exported through sysfs 2023-03-29 12:04:10 +02:00
class.c driver core: class: move EXPORT_SYMBOL_GPL() lines to the correct place 2023-02-14 15:46:56 +01:00
component.c drivers: base: component: fix memory leak with using debugfs_lookup() 2023-02-08 13:33:10 +01:00
container.c
core.c driver core: fw_devlink: Print full path and name of fwnode 2023-02-25 10:52:02 +01:00
cpu.c driver core: cpu: don't hand-override the uevent bus_type callback. 2023-02-11 11:50:41 +01:00
dd.c drivers: base: dd: fix memory leak with using debugfs_lookup() 2023-02-08 13:33:13 +01:00
devcoredump.c devcoredump : Serialize devcd_del work 2022-09-24 14:01:40 +02:00
devres.c devres: Use kmalloc_size_roundup() to match ksize() usage 2022-11-09 15:11:46 +01:00
devtmpfs.c Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
driver.c driver core: create bus_is_registered() 2023-02-09 10:43:35 +01:00
firmware.c
hypervisor.c
init.c init: Initialize noop_backing_dev_info early 2022-06-16 10:55:57 +02:00
isa.c bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
Kconfig devtmpfs: mount with noexec and nosuid 2021-12-30 13:54:42 +01:00
Makefile genirq: Get rid of GENERIC_MSI_IRQ_DOMAIN 2022-11-17 15:15:20 +01:00
map.c driver: base: Prefer unsigned int to bare use of unsigned 2021-07-21 17:30:09 +02:00
memory.c drivers/base/memory: Fix comments for phys_index_show() 2023-01-20 14:15:00 +01:00
module.c
node.c mm: memory-failure: add memory failure stats to sysfs 2023-02-02 22:33:28 -08:00
physical_location.c driver core: location: Free struct acpi_pld_info *pld before return false 2023-01-20 14:20:30 +01:00
physical_location.h driver core: Add sysfs support for physical location of a device 2022-04-27 09:51:57 +02:00
pinctrl.c
platform-msi.c genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced 2023-03-02 18:09:44 +01:00
platform.c driver core: platform: simplify __platform_driver_probe() 2023-02-01 14:08:10 +01:00
property.c device property: fix of node refcount leak in fwnode_graph_get_next_endpoint() 2023-01-19 14:45:41 +01:00
soc.c driver core: soc: remove layering violation for the soc_bus 2023-01-31 09:09:53 +01:00
swnode.c driver core: make kobj_type structures constant 2023-02-08 13:34:30 +01:00
syscore.c syscore: Use pm_pr_dbg() for syscore_{suspend,resume}() 2020-09-08 13:32:06 +02:00
topology.c drivers/base: fix userspace break from using bin_attributes for cpumap and cpulist 2022-07-15 17:36:33 +02:00
trace.c devres: Enable trace events 2021-06-15 17:14:36 +02:00
trace.h devres: Enable trace events 2021-06-15 17:14:36 +02:00
transport_class.c drivers: base: transport_class: fix resource leak when transport_add_device() fails 2023-01-20 14:22:53 +01:00