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2023-04-20powerpc/64: vmlinux support building with PCREL addresingNicholas Piggin
PC-Relative or PCREL addressing is an extension to the ELF ABI which uses Power ISA v3.1 PC-relative instructions to calculate addresses, rather than the traditional TOC scheme. Add an option to build vmlinux using pcrel addressing. Modules continue to use TOC addressing. - TOC address helpers and r2 are poisoned with -1 when running vmlinux. r2 could be used for something useful once things are ironed out. - Assembly must call C functions with @notoc annotation, or the linker complains aobut a missing nop after the call. This is done with the CFUNC macro introduced earlier. - Boot: with the exception of prom_init, the execution branches to the kernel virtual address early in boot, before any addresses are generated, which ensures 34-bit pcrel addressing does not miss the high PAGE_OFFSET bits. TOC relative addressing has a similar requirement. prom_init does not go to the virtual address and its addresses should not carry over to the post-prom kernel. - Ftrace trampolines are converted from TOC addressing to pcrel addressing, including module ftrace trampolines that currently use the kernel TOC to find ftrace target functions. - BPF function prologue and function calling generation are converted from TOC to pcrel. - copypage_64.S has an interesting problem, prefixed instructions have alignment restrictions so the linker can add padding, which makes the assembler treat the difference between two local labels as non-constant even if alignment is arranged so padding is not required. This may need toolchain help to solve nicely, for now move the prefix instruction out of the alternate patch section to work around it. This reduces kernel text size by about 6%. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408021752.862660-6-npiggin@gmail.com
2023-04-20powerpc: add CFUNC assembly label annotationNicholas Piggin
This macro is to be used in assembly where C functions are called. pcrel addressing mode requires branches to functions with a localentry value of 1 to have either a trailing nop or @notoc. This macro permits the latter without changing callers. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Add dummy definitions to fix selftests build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408021752.862660-5-npiggin@gmail.com
2023-04-20powerpc/64: Add support to build with prefixed instructionsNicholas Piggin
Add an option to build kernel and module with prefixed instructions if the CPU and toolchain support it. This is not related to kernel support for userspace execution of prefixed instructions. Building with prefixed instructions breaks some extended inline asm memory addressing, for example it will provide immediates that exceed the range of simple load/store displacement. Whether this is a toolchain or a kernel asm problem remains to be seen. For now, these are replaced with simpler and less efficient direct register addressing when compiling with prefixed. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408021752.862660-4-npiggin@gmail.com
2023-04-20powerpc/85xx: p2020: Enable boards by new config option CONFIG_PPC_P2020Pali Rohár
Generic unified P2020 machine description which supports all P2020-based boards is now in separate file p2020.c. So create a separate config option CONFIG_PPC_P2020 for it. Previously machine descriptions for P2020 boards were enabled by CONFIG_MPC85xx_DS or CONFIG_MPC85xx_RDB option. So set CONFIG_PPC_P2020 to be enabled by default when one of those option is enabled. This allows to compile support for P2020 boards without need to have enabled support for older mpc85xx boards. And to compile kernel for old mpc85xx boards without having enabled support for new P2020 boards. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-13-pali@kernel.org
2023-04-20powerpc/85xx: p2020: Define just one machine descriptionPali Rohár
Combine machine descriptions and code of all P2020 boards into just one generic unified P2020 machine description. This allows kernel to boot on any P2020-based board with P2020 DTS file without need to patch kernel and define a new machine description in 85xx powerpc platform directory. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-12-pali@kernel.org
2023-04-20powerpc/85xx: p2020: Unify .setup_arch and .init_IRQ callbacksPali Rohár
Make just one .setup_arch and one .init_IRQ callback implementation for all P2020 board code. This deduplicate repeated and same code. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-11-pali@kernel.org
2023-04-20powerpc/85xx: mpc85xx_ds: Move i8259 code into own filePali Rohár
In order to share mpc85xx i8259 code between DS and P2020. Prefix i8259 debug and error messages by i8259 word. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Fix some coding style warnings in the moved code] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-10-pali@kernel.org
2023-04-20powerpc/85xx: p2020: Move all P2020 RDB machine descriptions to p2020.cPali Rohár
This moves P2020 RDB machine descriptions into new p2020.c source file. This is preparation for code de-duplication and providing one unified machine description for all P2020 boards. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-9-pali@kernel.org
2023-04-20powerpc/85xx: p2020: Move all P2020 DS machine descriptions to p2020.cPali Rohár
This moves P2020 DS machine descriptions into new p2020.c source file. This is preparation for code de-duplication and providing one unified machine description for all P2020 boards. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-8-pali@kernel.org
2023-04-20powerpc/85xx: Remove #ifdef CONFIG_QUICC_ENGINE in mpc85xx_rdbChristophe Leroy
mpc85xx_qe_par_io_init() is a stub when CONFIG_QUICC_ENGINE is not set. CONFIG_UCC_GETH and CONFIG_SERIAL_QE depend on CONFIG_QUICC_ENGINE. Remove #ifdef CONFIG_QUICC_ENGINE Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-7-pali@kernel.org
2023-04-20powerpc/85xx: Remove #ifdefs CONFIG_PPC_I8259 in mpc85xx_dsChristophe Leroy
All necessary items are declared all the time, no need to use a #ifdef CONFIG_PPC_I8259. Refactor CONFIG_PPC_I8259 actions into a dedicated init function. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-6-pali@kernel.org
2023-04-20powerpc/85xx: mpc85xx_{ds/rdb} replace prink by pr_xxx macroChristophe Leroy
Use pr_debug() instead of printk(KERN_DEBUG Use pr_err() instead of printk(KERN_ERR Use pr_info() instead of printk(KERN_INFO or printk(" Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-5-pali@kernel.org
2023-04-20powerpc/85xx: mpc85xx_{ds/rdb} replace BUG_ON() by WARN_ON()Christophe Leroy
No need to BUG() in case mpic_alloc() fails. Use WARN_ON(). Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-4-pali@kernel.org
2023-04-20powerpc/85xx: mpc85xx_{ds/rdb} compact the call to mpic_alloc()Christophe Leroy
Reduce number of lines in the call to mpic_alloc(). Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-3-pali@kernel.org
2023-04-20powerpc/85xx: Remove DBG() macroChristophe Leroy
DBG() macro is defined at three places while used only one time at one place. Replace its only use by a pr_debug() and remove the macro. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230408140122.25293-2-pali@kernel.org
2023-04-20powerpc/fsl_uli1575: Mark uli_exclude_device() as staticPali Rohár
Function uli_exclude_device() is not used outside of the fsl_uli1575.c source file anymore. So mark it as static and remove public prototype. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-9-pali@kernel.org
2023-04-20powerpc/86xx: mpc86xx_hpcn: Call uli_init() instead of explicit ppc_md ↵Pali Rohár
assignment After calling fsl_pci_assign_primary(), it is possible to use uli_init() to conditionally initialize ppc_md.pci_exclude_device callback based on the uli1575 detection. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-8-pali@kernel.org
2023-04-20powerpc/fsl_uli1575: Allow to disable FSL_ULI1575 supportPali Rohár
ULI1575 PCIe south bridge exists only on some Freescale boards. Allow to disable CONFIG_FSL_ULI1575 symbol when it is not explicitly selected and only implied. This is achieved by marking symbol as visible by providing short description. Also adds dependency for this symbol to prevent enabling it on platforms on which driver does not compile. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-7-pali@kernel.org
2023-04-20powerpc/85xx: mpc85xx_rdb: Do not automatically select FSL_ULI1575Pali Rohár
Boards provided by CONFIG_MPC85xx_RDB option do not initialize fsl_uli1575.c driver. So remove explicit select dependency on it. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-6-pali@kernel.org
2023-04-20powerpc/85xx: mpc85xx_ds: Move uli_init() code into its own driver filePali Rohár
Move uli_init() function into existing driver fsl_uli1575.c file in order to share its code between more platforms and board files. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-5-pali@kernel.org
2023-04-20powerpc/fsl_uli1575: Simplify uli_exclude_device() usagePali Rohár
Function uli_exclude_device() is called only from mpc86xx_exclude_device() and mpc85xx_exclude_device() functions. Both those functions are same, so merge its logic directly into the uli_exclude_device() function. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-4-pali@kernel.org
2023-04-20powerpc/85xx: mpc85xx_ds: Simplify mpc85xx_exclude_device() functionPali Rohár
Function mpc85xx_exclude_device() is installed and used only when pci_with_uli is fsl_pci_primary. So replace check for pci_with_uli by fsl_pci_primary in mpc85xx_exclude_device() and move pci_with_uli variable declaration into function mpc85xx_ds_uli_init() where it is used. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-3-pali@kernel.org
2023-04-20powerpc/fsl_uli1575: Misc cleanupChristophe Leroy
Use a single line for uli_exclude_device(). Add uli_exclude_device() prototype in ppc-pci.h and guard it. Remove that prototype from mpc85xx_ds.c and mpc86xx_hpcn.c files. Make uli_pirq_to_irq[] static as it is used only in that file. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230409000812.18904-2-pali@kernel.org
2023-04-05powerc/mm: try VMA lock-based page fault handling firstLaurent Dufour
Attempt VMA lock-based page fault handling first, and fall back to the existing mmap_lock-based handling if that fails. Copied from "x86/mm: try VMA lock-based page fault handling first" [ldufour@linux.ibm.com: powerpc/mm: fix mmap_lock bad unlock] Link: https://lkml.kernel.org/r/20230306154244.17560-1-ldufour@linux.ibm.com Link: https://lore.kernel.org/linux-mm/842502FB-F99C-417C-9648-A37D0ECDC9CE@linux.ibm.com Link: https://lkml.kernel.org/r/20230227173632.3292573-32-surenb@google.com Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Sachin Sant <sachinp@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-05mm, treewide: redefine MAX_ORDER sanelyKirill A. Shutemov
MAX_ORDER currently defined as number of orders page allocator supports: user can ask buddy allocator for page order between 0 and MAX_ORDER-1. This definition is counter-intuitive and lead to number of bugs all over the kernel. Change the definition of MAX_ORDER to be inclusive: the range of orders user can ask from buddy allocator is 0..MAX_ORDER now. [kirill@shutemov.name: fix min() warning] Link: https://lkml.kernel.org/r/20230315153800.32wib3n5rickolvh@box [akpm@linux-foundation.org: fix another min_t warning] [kirill@shutemov.name: fixups per Zi Yan] Link: https://lkml.kernel.org/r/20230316232144.b7ic4cif4kjiabws@box.shutemov.name [akpm@linux-foundation.org: fix underlining in docs] Link: https://lore.kernel.org/oe-kbuild-all/202303191025.VRCTk6mP-lkp@intel.com/ Link: https://lkml.kernel.org/r/20230315113133.11326-11-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-04PCI: Introduce pci_dev_for_each_resource()Mika Westerberg
Instead of open-coding it everywhere introduce a tiny helper that can be used to iterate over each resource of a PCI device, and convert the most obvious users into it. While at it drop doubled empty line before pdev_sort_resources(). No functional changes intended. Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20230330162434.35055-4-andriy.shevchenko@linux.intel.com Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
2023-04-04powerpc: Use of_address_to_resource()Rob Herring
Replace open coded reading of "reg" or of_get_address()/ of_translate_address() calls with a single call to of_address_to_resource(). Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230329220337.141295-1-robh@kernel.org
2023-04-04powerpc/usbgecko: Use of_iomap()Rob Herring
Replace of_get_property()+of_translate_address()+ioremap() with a call to of_iomap() which does all those steps. Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230327223109.820381-1-robh@kernel.org
2023-04-04powerpc/papr_scm: Update the NUMA distance table for the target nodeAneesh Kumar K.V
Platform device helper routines won't update the NUMA distance table while creating a platform device, even if the device is present on a NUMA node that doesn't have memory or CPU. This is especially true for pmem devices. If the target node of the pmem device is not online, we find the nearest online node to the device and associate the pmem device with that online node. To find the nearest online node, we should have the numa distance table updated correctly. Update the distance information during the device probe. For a papr scm device on NUMA node 3 distance_lookup_table value for distance_ref_points_depth = 2 before and after fix is below: Before fix: node 3 distance depth 0 - 0 node 3 distance depth 1 - 0 node 4 distance depth 0 - 4 node 4 distance depth 1 - 2 node 5 distance depth 0 - 5 node 5 distance depth 1 - 1 After fix node 3 distance depth 0 - 3 node 3 distance depth 1 - 1 node 4 distance depth 0 - 4 node 4 distance depth 1 - 2 node 5 distance depth 0 - 5 node 5 distance depth 1 - 1 Without the fix, the nearest numa node to the pmem device (NUMA node 3) will be picked as 4. After the fix, we get the correct numa node which is 5. Fixes: da1115fdbd6e ("powerpc/nvdimm: Pick nearby online node if the device node is not online") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230404041433.1781804-1-aneesh.kumar@linux.ibm.com
2023-04-03Merge 6.3-rc5 into driver-core-nextGreg Kroah-Hartman
We need the fixes in here for testing, as well as the driver core changes for documentation updates to build on. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-30powerpc: Use of_property_read_bool() for boolean propertiesRob Herring
It is preferred to use typed property access functions (i.e. of_property_read_<type> functions) rather than low-level of_get_property/of_find_property functions for reading properties. Convert reading boolean properties to of_property_read_bool(). Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230310144659.1541127-1-robh@kernel.org
2023-03-30powerpc: Use of_property_present() for testing DT property presenceRob Herring
It is preferred to use typed property access functions (i.e. of_property_read_<type> functions) rather than low-level of_get_property/of_find_property functions for reading properties. As part of this, convert of_get_property/of_find_property calls to the recently added of_property_present() helper when we just want to test for presence of a property and nothing more. Signed-off-by: Rob Herring <robh@kernel.org> [mpe: Drop change in ppc4xx_probe_pci_bridge(), formatting] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230310144657.1541039-1-robh@kernel.org
2023-03-30powerpc/wii: fix resource printk format warningsRandy Dunlap
Use "%pa" format specifier for resource_size_t to avoid compiler printk format warnings. ../arch/powerpc/platforms/embedded6xx/flipper-pic.c: In function 'flipper_pic_init': ../include/linux/kern_levels.h:5:25: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=] ../arch/powerpc/platforms/embedded6xx/flipper-pic.c:148:9: note: in expansion of macro 'pr_info' 148 | pr_info("controller at 0x%08x mapped to 0x%p\n", res.start, io_base); | ^~~~~~~ ../arch/powerpc/platforms/embedded6xx/hlwd-pic.c: In function 'hlwd_pic_init': ../include/linux/kern_levels.h:5:25: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=] ../arch/powerpc/platforms/embedded6xx/hlwd-pic.c:174:9: note: in expansion of macro 'pr_info' 174 | pr_info("controller at 0x%08x mapped to 0x%p\n", res.start, io_base); | ^~~~~~~ ../arch/powerpc/platforms/embedded6xx/wii.c: In function 'wii_ioremap_hw_regs': ../include/linux/kern_levels.h:5:25: error: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=] ../arch/powerpc/platforms/embedded6xx/wii.c:77:17: note: in expansion of macro 'pr_info' 77 | pr_info("%s at 0x%08x mapped to 0x%p\n", name, | ^~~~~~~ Fixes: 028ee972f032 ("powerpc: gamecube/wii: flipper interrupt controller support") Fixes: 9c21025c7845 ("powerpc: wii: hollywood interrupt controller support") Fixes: 5a7ee3198dfa ("powerpc: wii: platform support") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230223070116.660-3-rdunlap@infradead.org
2023-03-30powerpc/mpc512x: fix resource printk format warningRandy Dunlap
Use "%pa" format specifier for resource_size_t to avoid a compiler printk format warning. ../arch/powerpc/platforms/512x/clock-commonclk.c: In function 'mpc5121_clk_provide_backwards_compat': ../arch/powerpc/platforms/512x/clock-commonclk.c:989:44: error: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=] 989 | snprintf(devname, sizeof(devname), "%08x.%s", res.start, np->name); \ | ^~~~~~~~~ ~~~~~~~~~ | | | resource_size_t {aka long long unsigned int} Prevents 24 such warnings. Fixes: 01f25c371658 ("clk: mpc512x: add backwards compat to the CCF code") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230223070116.660-2-rdunlap@infradead.org
2023-03-30powerpc/pseries: Add spaces around / operatorPetr Vaněk
This is follow up change after 14b5d59a261b ("powerpc/pseries: Fix formatting to make code look more beautiful") to conform to kernel coding style. Signed-off-by: Petr Vaněk <arkamar@atlas.cz> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230324220041.11378-1-arkamar@atlas.cz
2023-03-29powerpc/pseries/vas: Ignore VAS update for DLPAR if copy/paste is not enabledHaren Myneni
The hypervisor supports user-mode NX from Power10. pseries_vas_dlpar_cpu() is called from lparcfg_write() to update VAS windows for DLPAR event in shared processor mode and the kernel gets -ENOTSUPP for HCALLs if the user-mode NX is not supported. The current VAS implementation also supports only with Radix page tables. Whereas in dedicated processor mode, pseries_vas_notifier() is registered only if the copy/paste feature is enabled. So instead of displaying HCALL error messages, update VAS capabilities if the copy/paste feature is available. This patch ignores updating VAS capabilities in pseries_vas_dlpar_cpu() and returns success if the copy/paste feature is not enabled. Then lparcfg_write() completes the processor DLPAR operations without any failures. Fixes: 2147783d6bf0 ("powerpc/pseries: Use lparcfg to reconfig VAS windows for DLPAR CPU") Cc: stable@vger.kernel.org # v6.1+ Signed-off-by: Haren Myneni <haren@linux.ibm.com> Reviewed-by: Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/1d0e727e7dbd9a28627ef08ca9df9c86a50175e2.camel@linux.ibm.com
2023-03-29driver core: class: mark the struct class for sysfs callbacks as constantGreg Kroah-Hartman
struct class should never be modified in a sysfs callback as there is nothing in the structure to modify, and frankly, the structure is almost never used in a sysfs callback, so mark it as constant to allow struct class to be moved to read-only memory. While we are touching all class sysfs callbacks also mark the attribute as constant as it can not be modified. The bonding code still uses this structure so it can not be removed from the function callbacks. Cc: "David S. Miller" <davem@davemloft.net> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Bartosz Golaszewski <brgl@bgdev.pl> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Miquel Raynal <miquel.raynal@bootlin.com> Cc: Namjae Jeon <linkinjeon@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Russ Weight <russell.h.weight@intel.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Steve French <sfrench@samba.org> Cc: Vignesh Raghavendra <vigneshr@ti.com> Cc: linux-cifs@vger.kernel.org Cc: linux-gpio@vger.kernel.org Cc: linux-mtd@lists.infradead.org Cc: linux-rdma@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: netdev@vger.kernel.org Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Link: https://lore.kernel.org/r/20230325084537.3622280-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-24treewide: Trace IPIs sent via smp_send_reschedule()Valentin Schneider
To be able to trace invocations of smp_send_reschedule(), rename the arch-specific definitions of it to arch_smp_send_reschedule() and wrap it into an smp_send_reschedule() that contains a tracepoint. Changes to include the declaration of the tracepoint were driven by the following coccinelle script: @func_use@ @@ smp_send_reschedule(...); @include@ @@ #include <trace/events/ipi.h> @no_include depends on func_use && !include@ @@ #include <...> + + #include <trace/events/ipi.h> [csky bits] [riscv bits] Signed-off-by: Valentin Schneider <vschneid@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Guo Ren <guoren@kernel.org> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Link: https://lore.kernel.org/r/20230307143558.294354-6-vschneid@redhat.com
2023-03-23powerpc/40x: Add missing select OF_GPIO_MM_GPIOCHIPAndy Shevchenko
Since the split of the legacy of_mm_gpio_chip to a separate file and a specific build configuration option, the users must select it when needed. The PowerPC 40x code misses this, so we have to add the select here. Fixes: a99cc66807d6 ("gpiolib: split of_mm_gpio_chip out of linux/of_gpio.h") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2023-03-23driver core: bus: mark the struct bus_type for sysfs callbacks as constantGreg Kroah-Hartman
struct bus_type should never be modified in a sysfs callback as there is nothing in the structure to modify, and frankly, the structure is almost never used in a sysfs callback, so mark it as constant to allow struct bus_type to be moved to read-only memory. Cc: "David S. Miller" <davem@davemloft.net> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Alexandre Bounine <alex.bou9@gmail.com> Cc: Alison Schofield <alison.schofield@intel.com> Cc: Ben Widawsky <bwidawsk@kernel.org> Cc: Dexuan Cui <decui@microsoft.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Harald Freudenberger <freude@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Hu Haowen <src.res@email.cn> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Stuart Yoder <stuyoder@gmail.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Yanteng Si <siyanteng@loongson.cn> Acked-by: Ilya Dryomov <idryomov@gmail.com> # rbd Acked-by: Ira Weiny <ira.weiny@intel.com> # cxl Reviewed-by: Alex Shi <alexs@kernel.org> Acked-by: Iwona Winiarska <iwona.winiarska@intel.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> # pci Acked-by: Wei Liu <wei.liu@kernel.org> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> # scsi Link: https://lore.kernel.org/r/20230313182918.1312597-23-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-22powerpc: Simplify sysctl registration for nmi_wd_lpm_factor_ctl_tableLuis Chamberlain
There is no need to declare an extra tables to just create directory, this can be easily be done with a prefix path with register_sysctl(). Simplify this registration. Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230310232850.3960676-3-mcgrof@kernel.org
2023-03-17powerpc/pseries: move to use bus_get_dev_root()Greg Kroah-Hartman
Direct access to the struct bus_type dev_root pointer is going away soon so replace that with a call to bus_get_dev_root() instead, which is what it is there for. Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linuxppc-dev@lists.ozlabs.org Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Link: https://lore.kernel.org/r/20230313182918.1312597-14-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-17powerpc/powernv: move to use bus_get_dev_root()Greg Kroah-Hartman
Direct access to the struct bus_type dev_root pointer is going away soon so replace that with a call to bus_get_dev_root() instead, which is what it is there for. Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com> Cc: Joel Stanley <joel@jms.id.au> Cc: Liang He <windhl@126.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Julia Lawall <Julia.Lawall@inria.fr> Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20230313182918.1312597-13-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-17driver core: class: remove module * from class_create()Greg Kroah-Hartman
The module pointer in class_create() never actually did anything, and it shouldn't have been requred to be set as a parameter even if it did something. So just remove it and fix up all callers of the function in the kernel tree at the same time. Cc: "Rafael J. Wysocki" <rafael@kernel.org> Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Link: https://lore.kernel.org/r/20230313181843.1207845-4-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-16powerpc: Make generic_calibrate_decr() the defaultChristophe Leroy
ppc_md.calibrate_decr() is a mandatory item. Its nullity is never checked so it must be non null on all platforms. Most platforms define generic_calibrate_decr() as their ppc_md.calibrate_decr(). Have time_init() call generic_calibrate_decr() when ppc_md.calibrate_decr() is NULL, and remove default assignment from all machines. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/6cb9865d916231c38401ba34ad1a98c249fae135.1676711562.git.christophe.leroy@csgroup.eu
2023-03-16powerpc/85xx: Fix function naming for p1023_rdb platformChristophe Leroy
p1023_rdb platform is a copy of mpc85xx_rdb platform and some of its functions have kept mpc85xx_rdb names. Rename the said functions. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/6cb9865d916231c38401ba34ad1a98c249fae135.1676711562.git.christophe.leroy@csgroup.eu
2023-03-16powerpc/gamecube|wii : Use machine_device_initcall()Christophe Leroy
Instead of checking machine type in the function, use machine_device_initcall(). Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/6cb9865d916231c38401ba34ad1a98c249fae135.1676711562.git.christophe.leroy@csgroup.eu
2023-03-16powerpc/47x: Split ppc47x machine in twoChristophe Leroy
This machine matches two compatibles and sets .pci_irq_fixup on one of them. Split it into two machines, then the probe function can be dropped. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Drop references to ppc47x_probe() to fix build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/6cb9865d916231c38401ba34ad1a98c249fae135.1676711562.git.christophe.leroy@csgroup.eu
2023-03-15powerpc/platforms: Use 'compatible' property for simple casesChristophe Leroy
Use the new 'compatible' property for simple cases. checkpatch complains about the new compatible being undocumented but in reality nothing is new so just ignore it for the time being. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/6cb9865d916231c38401ba34ad1a98c249fae135.1676711562.git.christophe.leroy@csgroup.eu
2023-03-15powerpc/iommu: Add iommu_ops to report capabilities and allow blocking domainsAlexey Kardashevskiy
Up until now PPC64 managed to avoid using iommu_ops. The VFIO driver uses a SPAPR TCE sub-driver and all iommu_ops uses were kept in the Type1 VFIO driver. Recent development added 2 uses of iommu_ops to the generic VFIO which broke POWER: - a coherency capability check; - blocking IOMMU domain - iommu_group_dma_owner_claimed()/... This adds a simple iommu_ops which reports support for cache coherency and provides a basic support for blocking domains. No other domain types are implemented so the default domain is NULL. Since now iommu_ops controls the group ownership, this takes it out of VFIO. This adds an IOMMU device into a pci_controller (=PHB) and registers it in the IOMMU subsystem, iommu_ops is registered at this point. This setup is done in postcore_initcall_sync. This replaces iommu_group_add_device() with iommu_probe_device() as the former misses necessary steps in connecting PCI devices to IOMMU devices. This adds a comment about why explicit iommu_probe_device() is still needed. The previous discussion is here: https://lore.kernel.org/r/20220707135552.3688927-1-aik@ozlabs.ru/ https://lore.kernel.org/r/20220701061751.1955857-1-aik@ozlabs.ru/ Fixes: e8ae0e140c05 ("vfio: Require that devices support DMA cache coherence") Fixes: 70693f470848 ("vfio: Set DMA ownership for VFIO devices") Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com> Acked-by: Alex Williamson <alex.williamson@redhat.com> [mpe: Fix CONFIG_IOMMU_API=n build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/2000135730.16998523.1678123860135.JavaMail.zimbra@raptorengineeringinc.com
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