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2023-08-16powerpc: remove <asm/export.h>Masahiro Yamada
All *.S files under arch/powerpc/ have been converted to include <linux/export.h> instead of <asm/export.h>. Remove <asm/export.h>. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230806150954.394189-3-masahiroy@kernel.org
2023-08-16powerpc: replace #include <asm/export.h> with #include <linux/export.h>Masahiro Yamada
Commit ddb5cdbafaaa ("kbuild: generate KSYMTAB entries by modpost") deprecated <asm/export.h>, which is now a wrapper of <linux/export.h>. Replace #include <asm/export.h> with #include <linux/export.h>. After all the <asm/export.h> lines are converted, <asm/export.h> and <asm-generic/export.h> will be removed. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> [mpe: Fixup selftests that stub asm/export.h] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230806150954.394189-2-masahiroy@kernel.org
2023-08-16powerpc: remove unneeded #include <asm/export.h>Masahiro Yamada
There is no EXPORT_SYMBOL line there, hence #include <asm/export.h> is unneeded. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230806150954.394189-1-masahiroy@kernel.org
2023-08-16powerpc/inst: add PPC_TLBILX_LPIDNick Desaulniers
Clang didn't recognize the instruction tlbilxlpid. This was fixed in clang-18 [0] then backported to clang-17 [1]. To support clang-16 and older, rather than using that instruction bare in inline asm, add it to ppc-opcode.h and use that macro as is done elsewhere for other instructions. Link: https://github.com/ClangBuiltLinux/linux/issues/1891 Link: https://github.com/llvm/llvm-project/issues/64080 Link: https://github.com/llvm/llvm-project/commit/53648ac1d0c953ae6d008864dd2eddb437a92468 [0] Link: https://github.com/llvm/llvm-project-release-prs/commit/0af7e5e54a8c7ac665773ac1ada328713e8338f5 [1] Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/llvm/202307211945.TSPcyOhh-lkp@intel.com/ Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230803-ppc_tlbilxlpid-v3-1-ca84739bfd73@google.com
2023-08-16powerpc/reg: Remove #ifdef around mtspr macroChristophe Leroy
That ifdef was introduced by commit 1458dd951f7c ("powerpc/8xx: Handle CPU6 ERRATA directly in mtspr() macro") and left over by commit 2a45addd21de ("powerpc/8xx: Remove CPU6 ERRATA Workaround") Remove it. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/cf652e47ea9e453e89813611b6f76d0939a12063.1687344017.git.christophe.leroy@csgroup.eu
2023-08-16powerpc/step: Mark __copy_mem_out() and __emulate_dcbz() __always_inlineChristophe Leroy
objtool reports two folliwng warnings: arch/powerpc/lib/sstep.o: warning: objtool: copy_mem_out+0x3c (.text+0x30c): call to __copy_mem_out() with UACCESS enabled arch/powerpc/lib/sstep.o: warning: objtool: emulate_dcbz+0x70 (.text+0x4dc): call to __emulate_dcbz() with UACCESS enabled Mark __copy_mem_out() and __emulate_dcbz() __always_inline Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/f1d4a15da70190f8c2fcddb377bbc1e09827242c.1687343857.git.christophe.leroy@csgroup.eu
2023-08-16powerpc/cpm2: Remove cpm2_map() and cpm2_unmap()Christophe Leroy
Since commit 449012daa92a ("[POWERPC] cpm2: Infrastructure code cleanup.") cpm2_map() is just returning cpm2_immr pointer and cpm2_unmap() does nothing. We already have parts of code that use cpm2_immr directly so get rid of cpm2_map() and cpm2_unmap() by using cpm2_immr directly. And avoid going through local pointers that hide the pointed structure. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/9fe6ff7284e9f968b12abe7de7c08d7ea40e29d6.1691474658.git.christophe.leroy@csgroup.eu
2023-08-16powerpc/8xx: Remove immr_map() and immr_unmap()Christophe Leroy
Since commit fb533d0c5a97 ("[POWERPC] 8xx: Infrastructure code cleanup.") immr_map() is just returning mpc8xxx_immr pointer and immr_unmap() do nothing. We already have parts of code that use mpc8xxx_immr directly so get rid of immr_map() and immr_unmap() by using mpc8xxx_immr directly. And avoid going through local pointers that hide the pointed structure. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/633ed46f6015ff44d5599258647ea517f75d6a1d.1691474658.git.christophe.leroy@csgroup.eu
2023-08-16powerpc: Remove CONFIG_PCI_8260Christophe Leroy
CONFIG_PCI_8260 is not used anymore, remove it. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/19a4c07466ce8b80f287a06eadcc80c4ab1d2c9e.1691474658.git.christophe.leroy@csgroup.eu
2023-08-16powerpc/include: Remove mpc8260.h and m82xx_pci.hChristophe Leroy
SIU_INT_IRQ1 is not used anywhere and __IO_BASE is defined in asm/io.h Remove m82xx_pci.h Then the only thing remaining in mpc8260.h is MPC82XX_BCR_PLDP Move MPC82XX_BCR_PLDP into asm/cpm2.h then remove mpc8260.h Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/afe23bf3624c389ff17e9789884c78c124b7b202.1691474658.git.christophe.leroy@csgroup.eu
2023-08-16powerpc/include: Declare mpc8xx_immr in 8xx_immap.hChristophe Leroy
Do the same as for cmp2_immr : declare it at the same place as its type immap_t, that is in 8xx_immap.h instead of fs_pd.h Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/62d490b65899c2f2667ca7045c5f0fad9cbda458.1691474658.git.christophe.leroy@csgroup.eu
2023-08-16powerpc/include: Remove unneeded #include <asm/fs_pd.h>Christophe Leroy
tqm8xx_setup.c and fs_enet.h don't use any items provided by fs_pd.h Remove unneeded #include <asm/fs_pd.h> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/b056c4e986a4a7707fc1994304c34f7bd15d6871.1691474658.git.christophe.leroy@csgroup.eu
2023-08-16ocxl: Use pci_dev_id() to simplify the codeZheng Zengkai
PCI core API pci_dev_id() can be used to get the BDF number for a pci device. We don't need to compose it mannually. Use pci_dev_id() to simplify the code a little bit. Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Acked-by: Andrew Donnellan <ajd@linux.ibm.com> Acked-by: Frederic Barrat <fbarrat@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230811102039.17257-1-zhengzengkai@huawei.com
2023-08-14powerpc/pseries: PLPKS: undo kernel-doc comment notationRandy Dunlap
Don't use kernel-doc "/**" comment format for non-kernel-doc comments. This prevents a kernel-doc warning: arch/powerpc/platforms/pseries/plpks.c:186: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Label is combination of label attributes + name. Fixes: 2454a7af0f2a ("powerpc/pseries: define driver for Platform KeyStore") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kernel test robot <lkp@intel.com> Link: lore.kernel.org/r/202308040430.GxmPAnwZ-lkp@intel.com Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230810000740.23756-1-rdunlap@infradead.org
2023-08-14powerpc/radix: Move some functions into #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLEChristophe Leroy
With skiboot_defconfig, Clang reports: CC arch/powerpc/mm/book3s64/radix_tlb.o arch/powerpc/mm/book3s64/radix_tlb.c:419:20: error: unused function '_tlbie_pid_lpid' [-Werror,-Wunused-function] static inline void _tlbie_pid_lpid(unsigned long pid, unsigned long lpid, ^ arch/powerpc/mm/book3s64/radix_tlb.c:663:20: error: unused function '_tlbie_va_range_lpid' [-Werror,-Wunused-function] static inline void _tlbie_va_range_lpid(unsigned long start, unsigned long end, ^ This is because those functions are only called from functions enclosed in a #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE Move below functions inside that #ifdef * __tlbie_pid_lpid(unsigned long pid, * __tlbie_va_lpid(unsigned long va, unsigned long pid, * fixup_tlbie_pid_lpid(unsigned long pid, unsigned long lpid) * _tlbie_pid_lpid(unsigned long pid, unsigned long lpid, * fixup_tlbie_va_range_lpid(unsigned long va, * __tlbie_va_range_lpid(unsigned long start, unsigned long end, * _tlbie_va_range_lpid(unsigned long start, unsigned long end, Fixes: f0c6fbbb9050 ("KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202307260802.Mjr99P5O-lkp@intel.com/ Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/3d72efd39f986ee939d068af69fdce28bd600766.1691568093.git.christophe.leroy@csgroup.eu
2023-08-14powerpc: xmon: remove unused variablesArnd Bergmann
Randconfig testing with W=1 showed up these warnings that I'd like to enable by default: arch/powerpc/xmon/xmon.c: In function 'dump_tlb_book3e': arch/powerpc/xmon/xmon.c:3833:42: error: variable 'lrat' set but not used [-Werror=unused-but-set-variable] 3833 | int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; | ^~~~ arch/powerpc/xmon/xmon.c:3831:23: error: variable 'lpidmask' set but not used [-Werror=unused-but-set-variable] 3831 | u32 mmucfg, pidmask, lpidmask; | ^~~~~~~~ arch/powerpc/xmon/xmon.c:3831:14: error: variable 'pidmask' set but not used [-Werror=unused-but-set-variable] 3831 | u32 mmucfg, pidmask, lpidmask; | ^~~~~~~ Just remove these as they have been unused since the code was added in 2010. Fixes: 03247157f7391 ("powerpc/book3e: Add TLB dump in xmon for Book3E") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230809131024.2039647-2-arnd@kernel.org
2023-08-14powerpc: mark more local variables as volatileArnd Bergmann
A while ago I created a2305e3de8193 ("powerpc: mark local variables around longjmp as volatile") in order to allow building powerpc with -Wextra enabled on gcc-11. I tried this again with gcc-13 and found two more of the same issues, presumably based on slightly different optimization paths being taken here: arch/powerpc/xmon/xmon.c:3306:27: error: variable 'mm' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] arch/powerpc/kexec/crash.c:353:22: error: variable 'i' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] I checked a bunch of randconfigs and found only these two, so just address them the same way as the others. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230809131024.2039647-1-arnd@kernel.org
2023-08-14powerpc/pmac32: enable serial options by default in defconfigYuan Tan
Serial is a critical feature for logging and debuging, and the other architectures enable serial by default. Let's enable CONFIG_SERIAL_PMACZILOG and CONFIG_SERIAL_PMACZILOG_CONSOLE by default. Signed-off-by: Yuan Tan <tanyuan@tinylab.org> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/bb7b5f9958b3e3a20f6573ff7ce7c5dc566e7e32.1690982937.git.tanyuan@tinylab.org
2023-08-14Merge branch 'topic/cpu-smt' into nextMichael Ellerman
Merge SMT changes we are sharing with the tip tree.
2023-08-12locking: remove spin_lock_prefetchMateusz Guzik
The only remaining consumer is new_inode, where it showed up in 2001 as commit c37fa164f793 ("v2.4.9.9 -> v2.4.9.10") in a historical repo [1] with a changelog which does not mention it. Since then the line got only touched up to keep compiling. While it may have been of benefit back in the day, it is guaranteed to at best not get in the way in the multicore setting -- as the code performs *a lot* of work between the prefetch and actual lock acquire, any contention means the cacheline is already invalid by the time the routine calls spin_lock(). It adds spurious traffic, for short. On top of it prefetch is notoriously tricky to use for single-threaded purposes, making it questionable from the get go. As such, remove it. I admit upfront I did not see value in benchmarking this change, but I can do it if that is deemed appropriate. Removal from new_inode and of the entire thing are in the same patch as requested by Linus, so whatever weird looks can be directed at that guy. Link: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/fs/inode.c?id=c37fa164f793735b32aa3f53154ff1a7659e6442 [1] Signed-off-by: Mateusz Guzik <mjguzik@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-08-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR. No conflicts. Adjacent changes: drivers/net/ethernet/intel/igc/igc_main.c 06b412589eef ("igc: Add lock to safeguard global Qbv variables") d3750076d464 ("igc: Add TransmissionOverrun counter") drivers/net/ethernet/microsoft/mana/mana_en.c a7dfeda6fdec ("net: mana: Fix MANA VF unload when hardware is unresponsive") a9ca9f9ceff3 ("page_pool: split types and declarations from page_pool.h") 92272ec4107e ("eth: add missing xdp.h includes in drivers") net/mptcp/protocol.h 511b90e39250 ("mptcp: fix disconnect vs accept race") b8dc6d6ce931 ("mptcp: fix rcv buffer auto-tuning") tools/testing/selftests/net/mptcp/mptcp_join.sh c8c101ae390a ("selftests: mptcp: join: fix 'implicit EP' test") 03668c65d153 ("selftests: mptcp: join: rework detailed report") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-08-08net: fs_enet: Don't include fs_enet_pd.h when not neededChristophe Leroy
Three platforms in arch/powerpc/platforms/8xx/ include fs_enet_pd.h but don't use anything from it. Remove the includes. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/de62ad1261a801c4a8ae4238bd4842ff278d2ddf.1691155347.git.christophe.leroy@csgroup.eu Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-08-08net: fs_enet: Remove stale prototypes from fsl_soc.cChristophe Leroy
Commit 3dd82a1ea724 ("[POWERPC] CPM: Always use new binding.") removed last use of init_fec_ioports() and init_fcc_ioports(). Remove stale prototypes then don't include anymore fs_enet_pd.h which was only included to provide fs_platform_info structure for the prototypes. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/f2f2db5dce3242eaa4a2aad6c226ba587fb0f513.1691155347.git.christophe.leroy@csgroup.eu Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-08-05Merge tag 'powerpc-6.5-5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Fix vmemmap altmap boundary check which could cause memory hotunplug failure - Create a dummy stackframe to fix ftrace stack unwind - Fix secondary thread bringup for Book3E ELFv2 kernels - Use early_ioremap/unmap() in via_calibrate_decr() Thanks to Aneesh Kumar K.V, Benjamin Gray, Christophe Leroy, David Hildenbrand, and Naveen N Rao. * tag 'powerpc-6.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/powermac: Use early_* IO variants in via_calibrate_decr() powerpc/64e: Fix secondary thread bringup for ELFv2 kernels powerpc/ftrace: Create a dummy stackframe to fix stack unwind powerpc/mm/altmap: Fix altmap boundary check
2023-08-04serial: cpm_uart: Don't include fs_uart_pd.h when not neededChristophe Leroy
Remove inclusion of fs_uart_pd.h from all files not using anything from that file. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/c7996ef4de56e7ee42a434e37d214cba337a146c.1691068700.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-04serial: cpm_uart: Remove stale prototype in powerpc/fsl_soc.cChristophe Leroy
Commit 0b5cf10691eb ("[POWERPC] 8xx: Convert mpc866ads to the new device binding.") removed last definition of init_smc_ioports(). Remove it. And don't include anymore fs_uart_pd.h which is only included to provide fs_uart_platform_info structure. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/2869659e7faa20b0a506347bc4d1059e22709f19.1691068700.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-04serial: cpm_uart: Use get_baudrate() instead of uart_baudrate()Christophe Leroy
uart_baudrate() is just a trivial wrapper to get_baudrate(). Use get_baudrate() directly and remove assignment in if condition. And also remove uart_clock() which is not used since commit 0b2a2e5b7747 ("cpm_uart: Remove !CONFIG_PPC_CPM_NEW_BINDING code") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/4d497386f576a3df768e44a04f9bb512e424c311.1691068700.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-02word-at-a-time: use the same return type for has_zero regardless of endiannessndesaulniers@google.com
Compiling big-endian targets with Clang produces the diagnostic: fs/namei.c:2173:13: warning: use of bitwise '|' with boolean operands [-Wbitwise-instead-of-logical] } while (!(has_zero(a, &adata, &constants) | has_zero(b, &bdata, &constants))); ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ || fs/namei.c:2173:13: note: cast one or both operands to int to silence this warning It appears that when has_zero was introduced, two definitions were produced with different signatures (in particular different return types). Looking at the usage in hash_name() in fs/namei.c, I suspect that has_zero() is meant to be invoked twice per while loop iteration; using logical-or would not update `bdata` when `a` did not have zeros. So I think it's preferred to always return an unsigned long rather than a bool than update the while loop in hash_name() to use a logical-or rather than bitwise-or. [ Also changed powerpc version to do the same - Linus ] Link: https://github.com/ClangBuiltLinux/linux/issues/1832 Link: https://lore.kernel.org/lkml/20230801-bitwise-v1-1-799bec468dc4@google.com/ Fixes: 36126f8f2ed8 ("word-at-a-time: make the interfaces truly generic") Debugged-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-08-02powerpc/powermac: Use early_* IO variants in via_calibrate_decr()Benjamin Gray
On a powermac platform, via the call path: start_kernel() time_init() ppc_md.calibrate_decr() (pmac_calibrate_decr) via_calibrate_decr() ioremap() and iounmap() are called. The unmap can enable interrupts unexpectedly (cond_resched() in vunmap_pmd_range()), which causes a warning later in the boot sequence in start_kernel(). Use the early_* variants of these IO functions to prevent this. The issue is pre-existing, but is surfaced by commit 721255b9826b ("genirq: Use a maple tree for interrupt descriptor management"). Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230706010816.72682-1-bgray@linux.ibm.com
2023-08-02powerpc/pseries: Honour current SMT state when DLPAR onlining CPUsMichael Ellerman
Integrate with the generic SMT support, so that when a CPU is DLPAR onlined it is brought up with the correct SMT mode. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230705145143.40545-11-ldufour@linux.ibm.com
2023-08-02powerpc: Add HOTPLUG_SMT supportMichael Ellerman
Add support for HOTPLUG_SMT, which enables the generic sysfs SMT support files in /sys/devices/system/cpu/smt, as well as the "nosmt" boot parameter. Implement the recently added hooks to allow partial SMT states, allow any number of threads per core. Tie the config symbol to HOTPLUG_CPU, which enables it on the major platforms that support SMT. If there are other platforms that want the SMT support that can be tweaked in future. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> [ldufour: remove topology_smt_supported] [ldufour: remove topology_smt_threads_supported] [ldufour: select CONFIG_SMT_NUM_THREADS_DYNAMIC] [ldufour: update kernel-parameters.txt] Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com> Link: https://msgid.link/20230705145143.40545-10-ldufour@linux.ibm.com
2023-08-02powerpc/pseries: Initialise CPU hotplug callbacks earlierMichael Ellerman
As part of the generic HOTPLUG_SMT code, there is support for disabling secondary SMT threads at boot time, by passing "nosmt" on the kernel command line. The way that is implemented is the secondary threads are brought partly online, and then taken back offline again. That is done to support x86 CPUs needing certain initialisation done on all threads. However powerpc has similar needs, see commit d70a54e2d085 ("powerpc/powernv: Ignore smt-enabled on Power8 and later"). For that to work the powerpc CPU hotplug callbacks need to be registered before secondary CPUs are brought online, otherwise __cpu_disable() fails due to smp_ops->cpu_disable being NULL. So split the basic initialisation into pseries_cpu_hotplug_init() which can be called early from setup_arch(). The DLPAR related initialisation can still be done later, because it needs to do allocations. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230705145143.40545-9-ldufour@linux.ibm.com
2023-08-02powerpc/kexec: fix minor typoLaurent Dufour
Function name in the descriptor was not correct. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202307251721.bUGcsCeQ-lkp@intel.com/ Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230725132759.53975-1-ldufour@linux.ibm.com
2023-08-02powerpc/ep8248e: Mark driver as non removableUwe Kleine-König
Instead of resorting to BUG() ensure that the driver isn't unbound by suppressing its bind and unbind sysfs attributes. As the driver is built-in there is no way to remove a device once bound. As a nice side effect this allows to drop the remove function. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230726081442.461026-1-u.kleine-koenig@pengutronix.de
2023-08-02powerpc: address missing-prototypes warningsArnd Bergmann
There are a few warnings in powerpc64 defconfig builds after -Wmissing-prototypes gets promoted from W=1 to the default warning set: arch/powerpc/mm/book3s64/pgtable.c:422:6: error: no previous prototype for 'arch_report_meminfo' [-Werror=missing-prototypes] arch/powerpc/platforms/cell/ras.c:275:5: error: no previous prototype for 'cbe_sysreset_hack' [-Werror=missing-prototypes] arch/powerpc/platforms/cell/spu_manage.c:29:21: error: no previous prototype for 'spu_devnode' [-Werror=missing-prototypes] arch/powerpc/platforms/pasemi/time.c:12:17: error: no previous prototype for 'pas_get_boot_time' [-Werror=missing-prototypes] arch/powerpc/platforms/powermac/feature.c:1532:13: error: no previous prototype for 'g5_phy_disable_cpu1' [-Werror=missing-prototypes] arch/powerpc/platforms/86xx/pic.c:28:13: error: no previous prototype for 'mpc86xx_init_irq' [-Werror=missing-prototypes] drivers/pci/pci-sysfs.c:936:13: error: no previous prototype for 'pci_adjust_legacy_attr' [-Werror=missing-prototypes] Address these by including the right header files or marking the functions static. The audit.c one is a bit tricky since compat_audit.h cannot include regular kernel headers tht have conflicting types on 32-bit powerpc. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [mpe: Drop change to __vmemmap_free() which only exists in mm] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230727122720.2558065-1-arnd@kernel.org
2023-08-02powerpc: Explicitly include correct DT includesRob Herring
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> [mpe: Fixup maple/setup.c which needs platform_device] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230724210247.778034-1-robh@kernel.org
2023-08-02powerpc/64s/radix: combine final TLB flush and lazy tlb mm shootdown IPIsNicholas Piggin
This performs lazy tlb mm shootdown when doing the exit TLB flush when all mm users go away and user mappings are removed, which avoids having to do the lazy tlb mm shootdown IPIs on the final mmput when all kernel references disappear. powerpc/64s uses a broadcast TLBIE for the exit TLB flush if remote CPUs need to be invalidated (unless TLBIE is disabled), so this doesn't necessarily save IPIs but it does avoid a broadcast TLBIE which is quite expensive. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Squash in preempt_disable/enable() fix from Nick] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230524060821.148015-5-npiggin@gmail.com
2023-08-02powerpc: Add mm_cpumask warning when context switchingNicholas Piggin
When context switching away from an mm, add a CONFIG_DEBUG_VM warning check to ensure this CPU is still set in the mask. This could catch bugs where the mask is improperly trimmed while the CPU is still using the mm. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230524060821.148015-4-npiggin@gmail.com
2023-08-02powerpc/64s: Use dec_mm_active_cpus helperNicholas Piggin
Avoid open-coded atomic_dec on mm->context.active_cpus and use the function made for it. Add CONFIG_DEBUG_VM underflow checking on the counter. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230524060821.148015-3-npiggin@gmail.com
2023-08-02powerpc: Account mm_cpumask and active_cpus in init_mmNicholas Piggin
init_mm mm_cpumask and context.active_cpus is not maintained at boot and hotplug. This seems to be harmless because init_mm does not have a userspace and so never gets user TLBs flushed, but it looks odd and it prevents some sanity checks being added. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230524060821.148015-2-npiggin@gmail.com
2023-08-02powerpc/64: Enable accelerated crypto algorithms in defconfigMichael Ellerman
Enable all the acclerated crypto algorithms as modules in the 64-bit defconfig, to get more test coverage. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230717115223.286158-1-mpe@ellerman.id.au
2023-08-02powerpc/crypto: don't build aes-gcm-p10 by defaultOmar Sandoval
None of the other accelerated crypto modules are built by default. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/40d9c7ebe82c9a9d4ace542ac433753d2f22c6a0.1689007370.git.osandov@osandov.com
2023-08-02powerpc/crypto: fix missing skcipher dependency for aes-gcm-p10Omar Sandoval
My stripped down configuration fails to build with: ERROR: modpost: "skcipher_walk_aead_encrypt" [arch/powerpc/crypto/aes-gcm-p10-crypto.ko] undefined! ERROR: modpost: "skcipher_walk_done" [arch/powerpc/crypto/aes-gcm-p10-crypto.ko] undefined! ERROR: modpost: "skcipher_walk_aead_decrypt" [arch/powerpc/crypto/aes-gcm-p10-crypto.ko] undefined! Fix it by selecting CRYPTO_SKCIPHER. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/c55ad70799e027a3d2756b85ccadc0af52ae8915.1689007370.git.osandov@osandov.com
2023-08-02powerpc/kuap: Use ASM feature fixups instead of static branchesChristophe Leroy
To avoid a useless nop on top of every uaccess enable/disable and make life easier for objtool, replace static branches by ASM feature fixups that will nop KUAP enabling instructions out in the unlikely case KUAP is disabled at boottime. Leave it as is on book3s/64 for now, it will be handled later when objtool is activated on PPC64. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/671948788024fd890ec4ed175bc332dab8664ea5.1689091022.git.christophe.leroy@csgroup.eu
2023-08-02powerpc/kuap: KUAP enabling/disabling functions must be __always_inlineChristophe Leroy
Objtool reports following warnings: arch/powerpc/kernel/signal_32.o: warning: objtool: __prevent_user_access.constprop.0+0x4 (.text+0x4): redundant UACCESS disable arch/powerpc/kernel/signal_32.o: warning: objtool: user_access_begin+0x2c (.text+0x4c): return with UACCESS enabled arch/powerpc/kernel/signal_32.o: warning: objtool: handle_rt_signal32+0x188 (.text+0x360): call to __prevent_user_access.constprop.0() with UACCESS enabled arch/powerpc/kernel/signal_32.o: warning: objtool: handle_signal32+0x150 (.text+0x4d4): call to __prevent_user_access.constprop.0() with UACCESS enabled This is due to some KUAP enabling/disabling functions being outline allthough they are marked inline. Use __always_inline instead. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/ca5e50ddbec3867db5146ebddbc9a1dc0e443bc8.1689091022.git.christophe.leroy@csgroup.eu
2023-08-02powerpc/kuap: Simplify KUAP lock/unlock on BOOK3S/32Christophe Leroy
On book3s/32 KUAP is performed at segment level. At the moment, when enabling userspace access, only current segment is modified. Then if a write is performed on another user segment, a fault is taken and all other user segments get enabled for userspace access. This then require special attention when disabling userspace access. Having a userspace write access crossing a segment boundary is unlikely. Having a userspace write access crossing a segment boundary back and forth is even more unlikely. So, instead of enabling userspace access on all segments when a write fault occurs, just change which segment has userspace access enabled in order to eliminate the case when more than one segment has userspace access enabled. That simplifies userspace access deactivation. There is however a corner case which is even more unlikely but has to be handled anyway: an unaligned access which is crossing a segment boundary. That would definitely require at least having userspace access enabled on the two segments. To avoid complicating the likely case for a so unlikely happening, handle such situation like an alignment exception and emulate the store. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/8de8580513c1a6e880bad1ba9a69d3efad3d4fa5.1689091022.git.christophe.leroy@csgroup.eu
2023-08-02powerpc/kuap: Use MMU_FTR_KUAP on all and refactor disabling kuapChristophe Leroy
All but book3s/64 use a static branch key for disabling kuap. book3s/64 uses an mmu feature. Refactor all targets to use MMU_FTR_KUAP like book3s/64. For PPC32 that implies updating mmu features fixups once KUAP has been initialised. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/6b3d7c977bad73378ea368bc6818e9c94ea95ab0.1689091022.git.christophe.leroy@csgroup.eu
2023-08-02powerpc/kuap: MMU_FTR_BOOK3S_KUAP becomes MMU_FTR_KUAPChristophe Leroy
In order to reuse MMU_FTR_BOOK3S_KUAP for other targets than BOOK3S, rename it MMU_FTR_KUAP. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/c8b6f7b8cd0eeaace96879ed0e0a157faa619451.1689091022.git.christophe.leroy@csgroup.eu
2023-08-02powerpc/features: Add capability to update mmu features laterChristophe Leroy
On powerpc32, features fixup is performed very early and that's too early to read the cmdline and take into account 'nosmap' parameter. On the other hand, no userspace access is performed that early and KUAP feature fixup can be performed later. Add a function to update mmu features. The function is passed a mask with the features that can be updated. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/31b27ee2c9d338f4f82cd8cd69d6bff979495290.1689091022.git.christophe.leroy@csgroup.eu
2023-08-02powerpc/kuap: Fold kuep_is_disabled() into its only userChristophe Leroy
kuep_is_disabled() was introduced by commit 91bb30822a2e ("powerpc/32s: Refactor update of user segment registers") but then all users but one were removed by commit 526d4a4c77ae ("powerpc/32s: Do kuep_lock() and kuep_unlock() in assembly"). Fold kuep_is_disabled() into init_new_context() which is its only user. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/b2247147c0a8c830ac82966451647850df4a64da.1689091022.git.christophe.leroy@csgroup.eu
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