- 05 Sep, 2022 20 commits
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Liang He authored
In ls_uarts_init(), add an of_node_put() to keep refcount balance. Signed-off-by:
Liang He <windhl@126.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220620065904.4071787-1-windhl@126.com
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Liang He authored
In ibmebus_match_path(), use of_node_put() to drop the reference returned by of_find_node_by_path() before testing for equality of the pointers. Signed-off-by:
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Liang He authored
In cell_iommu_init_disabled(), hold the reference returned by of_find_node_by_name() and use it to call of_node_put() for reference balance. Signed-off-by:
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Liang He authored
There are several bugs as following: (1) In cbe_get_be_node(), hold the reference returned by of_find_xxx and of_get_xxx OF APIs and use it to call of_node_put(). (2) In cbe_fill_regs_map(), same as above. (3) In cbe_regs_init(), during the iteration of for_each_node_by_type(), the refcount of 'cpu' will be automatically increased and decreased. However, there is a reference escaped out into 'map->cpu_node' and it should be properly handled. Signed-off-by: -
Liang He authored
Use of_node_put() for of_find_node_by_path() and of_find_node_by_phandle() to keep refcount balance. Signed-off-by:
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Liang He authored
In find_legacy_serial_ports(), of_find_node_by_path() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() when it is not used anymore. Signed-off-by:
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Liang He authored
In update_events_in_group(), of_find_node_by_phandle() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() in the failure path or when it is not used anymore. Signed-off-by:
Athira Rajeev <atrajeev@linux.vnet.ibm.com> Link: https://lore.kernel.org/r/20220618071353.4059000-1-windhl@126.com
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Liang He authored
Add missing of_node_put()s in various paths. Signed-off-by:
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Liang He authored
In init_ioports(), of_find_node_by_name() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() when it is not used anymore. Signed-off-by:
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Liang He authored
In maple_get_boot_time(), of_find_compatible_node() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() when it is not used anymore. Signed-off-by:
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Liang He authored
In gpio_halt_probe(), of_find_matching_node() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() in the failure path. Signed-off-by:
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Liang He authored
In media5200_init_irq(), of_find_compatible_node() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() in the failure path or when it is not used anymore. Don't worry about 'fpga_np == NULL' as of_node_put() can correctly handle that. Signed-off-by:
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Liang He authored
In ksi8560_setup_arch(), of_find_compatible_node() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() when it is not used anymore. Signed-off-by:
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Liang He authored
In mpc5121_clk_init(), of_find_compatible_node() will return a node pointer with refcount incremented. The reference should be dropped with of_node_put() when it is not used anymore. Signed-off-by:
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Christophe Leroy authored
With recent binutils, the following warning appears: VDSO32L arch/powerpc/kernel/vdso/vdso32.so.dbg /opt/gcc-12.2.0-nolibc/powerpc64-linux/bin/../lib/gcc/powerpc64-linux/12.2.0/../../../../powerpc64-linux/bin/ld: warning: arch/powerpc/kernel/vdso/getcpu-32.o: missing .note.GNU-stack section implies executable stack /opt/gcc-12.2.0-nolibc/powerpc64-linux/bin/../lib/gcc/powerpc64-linux/12.2.0/../../../../powerpc64-linux/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker To avoid that, explicitly tell the linker we don't want executable stack. For more explanations, see commit ffcf9c57 ("x86: link vdso and boot with -z noexecstack --no-warn-rwx-segments") Signed-off-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
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Christophe Leroy authored
As reported by Nathan, the module_init() macro was not taken into account because the header was missing. That means spe_mathemu_init() was never called. This should have been detected by gcc at build time, but due to '-w' flag it went undetected. Removing that flag leads to many warnings hence errors. Fix those warnings then remove the -w flag. Reported-by:
Nathan Chancellor <nathan@kernel.org> Signed-off-by:
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Nathan Chancellor authored
When building with a recent version of clang, there are a couple of errors around the call to module_init(): arch/powerpc/math-emu/math_efp.c:927:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int] module_init(spe_mathemu_init); ^ int arch/powerpc/math-emu/math_efp.c:927:13: error: a parameter list without types is only allowed in a function definition module_init(spe_mathemu_init); ^ 2 errors generated. module_init() is a macro, which is not getting expanded because module.h is not included in this file. Add the include so that the macro can expand properly, clearing up the build failure. Fixes: ac6f1203 ("powerpc/85xx: Workaroudn e500 CPU erratum A005") [chleroy: added fixes tag] Reported-by:kernel test robot <lkp@intel.com> Signed-off-by:
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Nicholas Piggin authored
dtl is the PAPR Dispatch Trace Log, which is entirely a pseries feature. The pseries platform alrady has a file dealing with the dtl, so move scanning for stolen time accounting there from kernel/time.c. Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
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Nicholas Piggin authored
Distro kernels tend to be moving to VIRT_CPU_ACCOUNTING_GEN, and there is not much reason why PPC64 should be special here. Remove the special case and make the ppc64 and pseries defconfigs use GEN accounting (others will use TICK, as-per Kconfig defaults). VIRT_CPU_ACCOUNTING_NATIVE does provide scaled vtime and stolen time apportioned between system and user time, and vtime accounting is not unconditionally enabled, and possibly other things. But it would be better at this point to extend GEN to cover important missing features rather than directing users back to a less used option. Signed-off-by:
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Nicholas Piggin authored
CONFIG_VIRT_CPU_ACCOUNTING_GEN under pseries does not provide stolen time accounting unless CONFIG_PARAVIRT_TIME_ACCOUNTING is enabled. Implement this using the VPA accumulated wait counters. Note this will not work on current KVM hosts because KVM does not implement the VPA dispatch counters (yet). It could be implemented with the dispatch trace log as it is for VIRT_CPU_ACCOUNTING_NATIVE, but that is not necessary for the more limited accounting provided by PARAVIRT_TIME_ACCOUNTING, and it is more expensive, complex, and has downsides like potential log wrap. From Shrikanth: [...] it was tested on Power10 [PowerVM] Shared LPAR. system has two LPAR. we will call first one LPAR1 and second one as LPAR2. Test was carried out in SMT=1. Similar observation was seen in SMT=8 as well. LPAR config header from each LPAR is below. LPAR1 is twice as big as LPAR2. Since Both are sharing the same underlying hardware, work stealing will happen when both the LPAR's are contending for the same resource. LPAR1: type=Shared mode=Uncapped smt=Off lcpu=40 cpus=40 ent=20.00 LPAR2: type=Shared mode=Uncapped smt=Off lcpu=20 cpus=40 ent=10.00 mpstat was used to check for the utilization. stress-ng has been used as the workload. Few cases are tested. when the both LPAR are idle there is no steal time. when LPAR1 starts running at 100% which consumes all of the physical resource, steal time starts to get accounted. With LPAR1 running at 100% and LPAR2 starts running, steal time starts increasing. This is as expected. When the LPAR2 Load is increased further, steal time increases further. Case 1: 0% LPAR1; 0% LPAR2 %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 99.95 Case 2: 100% LPAR1; 0% LPAR2 %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 97.68 0.00 0.00 0.00 0.00 0.00 2.32 0.00 0.00 0.00 Case 3: 100% LPAR1; 50% LPAR2 %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 86.34 0.00 0.10 0.00 0.00 0.03 13.54 0.00 0.00 0.00 Case 4: 100% LPAR1; 100% LPAR2 %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 78.54 0.00 0.07 0.00 0.00 0.02 21.36 0.00 0.00 0.00 Case 5: 50% LPAR1; 100% LPAR2 %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle 49.37 0.00 0.00 0.00 0.00 0.00 1.17 0.00 0.00 49.47 Patch is accounting for the steal time and basic tests are holding good. Signed-off-by:
Shrikanth Hegde <sshegde@linux.ibm.com> [mpe: Add SPDX tag to new paravirt_api_clock.h] Signed-off-by:
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- 04 Sep, 2022 3 commits
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Nicholas Piggin authored
The hypervisor exposes accumulated partition scheduling interval times in the VPA (lppaca). These can be used to implement a simple stolen time in the guest without complex and costly dtl scanning. Signed-off-by:
Fabiano Rosas <farosas@linux.ibm.com> Link: https://lore.kernel.org/r/20220902085316.2071519-2-npiggin@gmail.com
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Michael Ellerman authored
Systems using the hash MMU with a 4K page size don't support 4PB address space, so skip the test because the bug it tests for can't be triggered. Signed-off-by:
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Michael Ellerman authored
My commit to add PAPR_SCM to pseries_defconfig failed to add the required dependencies, meaning the driver doesn't get built. Add the required LIBNVDIMM=m. Fixes: d6481a71 ("powerpc/configs: Add PAPR_SCM to pseries_defconfig") Signed-off-by:
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- 01 Sep, 2022 4 commits
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Christophe Leroy authored
wii_memory_fixups() is not called anymore, remove it. Also remove left-overs in mmu_decl.h which were forgotten by commit 160985f3 ("powerpc/wii: remove wii_mmu_mapin_mem2()") Signed-off-by:
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Christophe Leroy authored
Since commit 9e849f23 ("powerpc/mm/32s: use generic mmu_mapin_ram() for all blocks.") it is possible to map all blocks as RAM on any PPC32. Remove related restrictions. And remove call to wii_memory_fixups() which doesn't do anything else than checks since commit 160985f3 ("powerpc/wii: remove wii_mmu_mapin_mem2()") Signed-off-by:
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Christophe Leroy authored
A comment about the reservation of gigantic pages was left in MMU_init() after commit 79cc38de ("powerpc/mm/hugetlb: Add support for reserving gigantic huge pages via kernel command line") Remove it. Signed-off-by:
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Christophe Leroy authored
Since commit 591b4b26 ("powerpc/code-patching: Pre-map patch area") the patch area is premapped so intermediate page tables are already allocated. Use __set_pte_at() directly instead of the heavy map_kernel_page(), at for unmapping just do a pte_clear() followed by a flush. __set_pte_at() can be used directly without the filters in set_pte_at() because we are mapping a normal page non executable. Make sure gcc knows text_poke_area is page aligned in order to optimise the flush. This change reduces by 66% the time needed to activate ftrace on an 8xx (588000 tb ticks instead of 1744000). Signed-off-by:
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- 26 Aug, 2022 12 commits
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Wolfram Sang authored
Commit 956b200a ("spi: spidev: Warn loudly if instantiated from DT as "spidev"") states that there should not be spidev nodes in DTs. Remove this non-HW description. There won't be a regression because it won't bind since 2015 anyhow. Fixes: 5d1d67e3 ("powerpc/82xx: add SPI support for mgcoge") Signed-off-by:
Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by:
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Joel Stanley authored
Enable the LiteX MMC device and it's dependency the common clock framework. Signed-off-by:
Joel Stanley <joel@jms.id.au> Acked-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
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Nicholas Miehlbradt authored
This selftest is designed to cover execute-only protections on the Radix MMU but will also work with Hash. The tests are based on those found in pkey_exec_test with modifications to use the generic mprotect() instead of the pkey variants. Signed-off-by:
Nicholas Miehlbradt <nicholas@linux.ibm.com> Signed-off-by:
Russell Currey <ruscur@russell.cc> Signed-off-by:
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Russell Currey authored
Add support for execute-only memory (XOM) for the Radix MMU by using an execute-only mapping, as opposed to the RX mapping used by powerpc's other MMUs. The Hash MMU already supports XOM through the execute-only pkey, which is a separate mechanism shared with x86. A PROT_EXEC-only mapping will map to RX, and then the pkey will be applied on top of it. mmap() and mprotect() consumers in userspace should observe the same behaviour on Hash and Radix despite the differences in implementation. Replacing the vma_is_accessible() check in access_error() with a read check should be functionally equivalent for non-Radix MMUs, since it follows write and execute checks. For Radix, the change enables detecting faults on execute-only mappings where vma_is_accessible() would return true. Signed-off-by:
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Wolfram Sang authored
Follow the advice of the below link and prefer 'strscpy' in this subsystem. Conversion is 1:1 because the return value is not used. Generated by a coccinelle script. Signed-off-by:
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Wolfram Sang authored
Follow the advice of the below link and prefer 'strscpy' in this subsystem. Conversion is 1:1 because the return value is not used. Generated by a coccinelle script. Signed-off-by:
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Christophe Leroy authored
calc_cam_sz() is used only in fsl_book3e.c, make it static. Signed-off-by:
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Christophe Leroy authored
rtas_size and rtas_data are not used anymore since at least commit 7c8c6b97 ("powerpc: Merge lmb.c and make MM initialization use it.") Remove them. Since commit 4b74a35f ("powerpc/32s: Make Hash var static") the forward declaration of struct hash_pte is unneeded. Remove it. __initial_memory_limit_addr was removed by commit e63075a3 ("memblock: Introduce default allocation limit and use it to replace explicit ones") Remove the declaration. Signed-off-by:
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Michael Ellerman authored
Add the NXP (nee Freescale) e5500 and e6500 to the ISA versions documentation. Signed-off-by:
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Michael Ellerman authored
The definitions for the patch sites etc. don't belong in asm-prototypes.h, they are not EXPORT'ed asm symbols. Move them into sections.h which is traditionally used for asm symbols. Signed-off-by:
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Michael Ellerman authored
The last use of dummy.c was dropped in commit 2bf11819 ("[POWERPC] Create a "wrapper" script and use it in arch/powerpc/boot"). Signed-off-by:
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Michael Ellerman authored
These files are all plain GPL 2.0, with a second sentence about being licensed as-is. Similar to the rule in commit 577b61ce ("treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_398.RULE"). Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20220819110430.433984-1-mpe@ellerman.id.au
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- 22 Aug, 2022 1 commit
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Christophe Leroy authored
PPC64 removed default mapping address from VDSO in commit 30d0b368 ("powerpc: Move 64bit VDSO to improve context switch performance"). Do like PPC64 and let get_unmapped_area() place the VDSO mapping at the address it wants, don't force a default address. This allows randomisation of VDSO address. Signed-off-by:
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