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2021-12-23powerpc/4xx: Add __init attribute to eligible functionsNick Child2-3/+3
Some functions defined in 'arch/powerpc/platforms/4xx' are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-15-nick.child@ibm.com
2021-12-23powerpc/ps3: Add __init attribute to eligible functionsNick Child7-24/+24
Some functions defined in 'arch/powerpc/platforms/ps3' are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-14-nick.child@ibm.com
2021-12-23powerpc/pseries: Add __init attribute to eligible functionsNick Child8-15/+15
Some functions defined in 'arch/powerpc/platforms/pseries' are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-13-nick.child@ibm.com
2021-12-23powerpc/powernv: Add __init attribute to eligible functionsNick Child13-26/+26
Some functions defined in 'arch/powerpc/platforms/powernv' are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-12-nick.child@ibm.com
2021-12-23powerpc/powermac: Add __init attribute to eligible functionsNick Child6-9/+9
Some functions defined in 'arch/powerpc/platforms/powermac` are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-11-nick.child@ibm.com
2021-12-23powerpc/pasemi: Add __init attribute to eligible functionsNick Child4-4/+4
Some functions defined in 'arch/powerpc/platforms/pasemi' are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-10-nick.child@ibm.com
2021-12-23powerpc/chrp: Add __init attribute to eligible functionsNick Child1-1/+1
The function `Enable_SRAM` defined in 'arch/powerpc/platforms/chrp' is deserving of an `__init` macro attribute. This function is only called by other initialization functions and therefore should inherit the attribute. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-9-nick.child@ibm.com
2021-12-23powerpc/cell: Add __init attribute to eligible functionsNick Child5-20/+20
Some functions defined in 'arch/powerpc/platforms/cell' are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-8-nick.child@ibm.com
2021-12-20powerpc: use swap() to make code cleanerYang Guang1-4/+2
Use the macro 'swap()' defined in 'include/linux/minmax.h' to avoid opencoding it. Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: David Yang <davidcomponentone@gmail.com> Signed-off-by: Yang Guang <yang.guang5@zte.com.cn> [mpe: Add include of linux/minmax.h] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/71a702c2189b16c152affd8a8cda1d84ce32741c.1639792543.git.yang.guang5@zte.com.cn
2021-12-16powerpc/pseries: use slab context cpumask allocation in CPU hotplug initNicholas Piggin1-4/+5
Slab is up at this point, using the bootmem allocator triggers a warning. Switch to using the regular cpumask allocator. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com> Reviewed-by: Nathan Lynch <nathanl@linux.ibm.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211105132923.1582514-1-npiggin@gmail.com
2021-12-16powerpc/pseries/vas: Don't print an error when VAS is unavailableNicholas Piggin1-2/+9
KVM does not support VAS so guests always print a useless error on boot vas: HCALL(398) error -2, query_type 0, result buffer 0x57f2000 Change this to only print the message if the error is not H_FUNCTION. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211126052133.1664375-1-npiggin@gmail.com
2021-12-09powerpc/powermac: Add additional missing lockdep_register_key()Christophe Leroy1-0/+2
Commit df1f679d19ed ("powerpc/powermac: Add missing lockdep_register_key()") fixed a problem that was causing a WARNING. There are two other places in the same file with the same problem originating from commit 9e607f72748d ("i2c_powermac: shut up lockdep warning"). Add missing lockdep_register_key() Fixes: 9e607f72748d ("i2c_powermac: shut up lockdep warning") Reported-by: Erhard Furtner <erhard_f@mailbox.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Depends-on: df1f679d19ed ("powerpc/powermac: Add missing lockdep_register_key()") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://bugzilla.kernel.org/show_bug.cgi?id=200055 Link: https://lore.kernel.org/r/2c7e421874e21b2fb87813d768cf662f630c2ad4.1638984999.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/cell: Fix clang -Wimplicit-fallthrough warningAnders Roxell1-0/+1
Clang warns: arch/powerpc/platforms/cell/pervasive.c:81:2: error: unannotated fall-through between switch labels case SRR1_WAKEEE: ^ arch/powerpc/platforms/cell/pervasive.c:81:2: note: insert 'break;' to avoid fall-through case SRR1_WAKEEE: ^ break; 1 error generated. Clang is more pedantic than GCC, which does not warn when failing through to a case that is just break or return. Clang's version is more in line with the kernel's own stance in deprecated.rst. Add athe missing break to silence the warning. Fixes: 6e83985b0f6e ("powerpc/cbe: Do not process external or decremeter interrupts from sreset") Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211207110228.698956-1-anders.roxell@linaro.org
2021-12-09powerpc: Remove CONFIG_PPC_HAVE_KUAP and CONFIG_PPC_HAVE_KUEPChristophe Leroy1-21/+0
All platforms now have KUAP and KUEP so remove CONFIG_PPC_HAVE_KUAP and CONFIG_PPC_HAVE_KUEP. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/a3c007ad0951965199e6ab2ef1035966bc66e771.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/kuap: Wire-up KUAP on book3e/64Christophe Leroy1-0/+1
This adds KUAP support to book3e/64. This is done by reading the content of SPRN_MAS1 and checking the TID at the time user pgtable is loaded. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/e2c2c9375afd4bbc06aa904d0103a5f5102a2b1a.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/kuap: Wire-up KUAP on 85xx in 32 bits mode.Christophe Leroy1-0/+1
This adds KUAP support to 85xx in 32 bits mode. This is done by reading the content of SPRN_MAS1 and checking the TID at the time user pgtable is loaded. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/f8696f8980ca1532ada3a2f0e0a03e756269c7fe.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/kuap: Wire-up KUAP on 40xChristophe Leroy1-2/+5
This adds KUAP support to 40x. This is done by checking the content of SPRN_PID at the time user pgtable is loaded. 40x doesn't have KUEP, but KUAP implies KUEP because when the PID doesn't match the page's PID, the page cannot be read nor executed. So KUEP is now automatically selected when KUAP is selected and disabled when KUAP is disabled. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/aaefa91897ddc42ac11019dc0e1d1a525bd08e90.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/kuap: Wire-up KUAP on 44xChristophe Leroy1-0/+1
This adds KUAP support to 44x. This is done by checking the content of SPRN_PID at the time it is read and written into SPRN_MMUCR. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/7d6c3f1978a26feada74b084f651e8cf1e3b3a47.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/kuap: Make PPC_KUAP_DEBUG depend on PPC_KUAP onlyChristophe Leroy1-1/+1
PPC_KUAP_DEBUG is supported by all platforms doing PPC_KUAP, it doesn't depend on Radix on book3s/64. This will avoid adding one more dependency when implementing KUAP on book3e/64. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/a5ff6228a36e51783b83d8c10d058db76e450f63.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/config: Add CONFIG_BOOKE_OR_40xChristophe Leroy1-0/+5
We have many functionnalities common to 40x and BOOKE, it leads to many places with #if defined(CONFIG_BOOKE) || defined(CONFIG_40x). We are going to add a few more with KUAP for booke/40x, so create a new symbol which is defined when either BOOKE or 40x is defined. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/9a3dbd60924cb25c9f944d3d8205ac5a0d15e229.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/book3e: Activate KUEP at all timeChristophe Leroy1-0/+2
On book3e, - When using 64 bits PTE: User pages don't have the SX bit defined so KUEP is always active. - When using 32 bits PTE: Implement KUEP by clearing SX bit during TLB miss for user pages. The impact is minimal and worth neither boot time nor build time selection. Activate it at all time. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/e376b114283fb94504e2aa2de846780063252cde.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/44x: Activate KUEP at all timeChristophe Leroy1-0/+1
On 44x, KUEP is implemented by clearing SX bit during TLB miss for user pages. The impact is minimal and not worth neither boot time nor build time selection. Activate it at all time. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/2414d662558e7fb27d1ed41c8e47c591d576acac.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/8xx: Activate KUEP at all timeChristophe Leroy1-0/+1
On the 8xx, there is absolutely no runtime impact with KUEP. Protection against execution of user code in kernel mode is set up at boot time by configuring the groups with contain all user pages as having swapped protection rights, in extenso EX for user and NA for supervisor. Configure KUEP at startup and force selection of CONFIG_PPC_KUEP. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/2129e86944323ffe9ed07fffbeafdfd2e363690a.1634627931.git.christophe.leroy@csgroup.eu
2021-12-09powerpc/microwatt: add POWER9_CPU, clear PPC_64S_HASH_MMUNicholas Piggin1-1/+0
Microwatt implements a subset of ISA v3.0 (which is equivalent to the POWER9_CPU option). It is radix-only, so does not require hash MMU support. This saves 20kB compressed dtbImage and 56kB vmlinux size. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-19-npiggin@gmail.com
2021-12-09powerpc/64s: Move hash MMU support code under CONFIG_PPC_64S_HASH_MMUNicholas Piggin8-5/+29
Compiling out hash support code when CONFIG_PPC_64S_HASH_MMU=n saves 128kB kernel image size (90kB text) on powernv_defconfig minus KVM, 350kB on pseries_defconfig minus KVM, 40kB on a tiny config. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Fixup defined(ARCH_HAS_MEMREMAP_COMPAT_ALIGN), which needs CONFIG. Fix radix_enabled() use in setup_initial_memory_limit(). Add some stubs to reduce number of ifdefs.] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-18-npiggin@gmail.com
2021-12-09powerpc/64s: Make hash MMU support configurableNicholas Piggin7-4/+32
This adds Kconfig selection which allows 64s hash MMU support to be disabled. It can be disabled if radix support is enabled, the minimum supported CPU type is POWER9 (or higher), and KVM is not selected. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-17-npiggin@gmail.com
2021-12-02powerpc/pseries: lparcfg don't include slb_size line in radix modeNicholas Piggin1-1/+2
This avoids a change in behaviour in the later patch making hash support configurable. This is possibly a user interface change, so the alternative would be a hard-coded slb_size=0 here. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-7-npiggin@gmail.com
2021-12-02powerpc/pseries: move process table registration away from hash-specific codeNicholas Piggin1-28/+28
This reduces ifdefs in a later change which makes hash support configurable. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-6-npiggin@gmail.com
2021-12-02powerpc/pseries: Stop selecting PPC_HASH_MMU_NATIVENicholas Piggin1-1/+0
The pseries platform does not use the native hash code but the PAPR virtualised hash interfaces, so remove PPC_HASH_MMU_NATIVE. This requires moving tlbiel code from hash_native.c to hash_utils.c. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-4-npiggin@gmail.com
2021-12-02powerpc: Rename PPC_NATIVE to PPC_HASH_MMU_NATIVENicholas Piggin11-12/+12
PPC_NATIVE now only controls the native HPT code, so rename it to be more descriptive. Restrict it to Book3S only. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-3-npiggin@gmail.com
2021-11-30powerpc/powermac: Add missing lockdep_register_key()Christophe Leroy1-0/+1
KeyWest i2c @0xf8001003 irq 42 /uni-n@f8000000/i2c@f8001000 BUG: key c2d00cbc has not been registered! ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:4801 lockdep_init_map_type+0x4c0/0xb4c Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.15.5-gentoo-PowerMacG4 #9 NIP: c01a9428 LR: c01a9428 CTR: 00000000 REGS: e1033cf0 TRAP: 0700 Not tainted (5.15.5-gentoo-PowerMacG4) MSR: 00029032 <EE,ME,IR,DR,RI> CR: 24002002 XER: 00000000 GPR00: c01a9428 e1033db0 c2d1cf20 00000016 00000004 00000001 c01c0630 e1033a73 GPR08: 00000000 00000000 00000000 e1033db0 24002004 00000000 f8729377 00000003 GPR16: c1829a9c 00000000 18305357 c1416fc0 c1416f80 c006ac60 c2d00ca8 c1416f00 GPR24: 00000000 c21586f0 c2160000 00000000 c2d00cbc c2170000 c216e1a0 c2160000 NIP [c01a9428] lockdep_init_map_type+0x4c0/0xb4c LR [c01a9428] lockdep_init_map_type+0x4c0/0xb4c Call Trace: [e1033db0] [c01a9428] lockdep_init_map_type+0x4c0/0xb4c (unreliable) [e1033df0] [c1c177b8] kw_i2c_add+0x334/0x424 [e1033e20] [c1c18294] pmac_i2c_init+0x9ec/0xa9c [e1033e80] [c1c1a790] smp_core99_probe+0xbc/0x35c [e1033eb0] [c1c03cb0] kernel_init_freeable+0x190/0x5a4 [e1033f10] [c000946c] kernel_init+0x28/0x154 [e1033f30] [c0035148] ret_from_kernel_thread+0x14/0x1c Add missing lockdep_register_key() Reported-by: Erhard Furtner <erhard_f@mailbox.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/69e4f55565bb45ebb0843977801b245af0c666fe.1638264741.git.christophe.leroy@csgroup.eu
2021-11-29powerpc/85xx: Make c293_pcie_pic_init() staticMichael Ellerman1-1/+1
To fix the W=1 warning: linux/arch/powerpc/platforms/85xx/c293pcie.c:22:13: error: no previous prototype for ‘c293_pcie_pic_init’ Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211124093254.1054750-3-mpe@ellerman.id.au
2021-11-29powerpc/85xx: Make mpc85xx_smp_kexec_cpu_down() staticMichael Ellerman1-2/+2
To fix the W=1 warning: arch/powerpc/platforms/85xx/smp.c:369:6: error: no previous prototype for ‘mpc85xx_smp_kexec_cpu_down’ Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211124093254.1054750-2-mpe@ellerman.id.au
2021-11-29powerpc/85xx: Fix no previous prototype warning for mpc85xx_setup_pmc()Michael Ellerman1-0/+2
Fixes the following W=1 warning: arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c:89:12: warning: no previous prototype for 'mpc85xx_setup_pmc' Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211124093254.1054750-1-mpe@ellerman.id.au
2021-11-29powerpc: remove cpu_online_cores_map functionNicholas Piggin2-8/+8
This function builds the cores online map with on-stack cpumasks which can cause high stack usage with large NR_CPUS. It is not used in any performance sensitive paths, so instead just check for first thread sibling. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211105035042.1398309-1-npiggin@gmail.com
2021-11-25powerpc/microwatt: Make microwatt_get_random_darn() staticMichael Ellerman1-1/+1
Make microwatt_get_random_darn() static, because it can be. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211118004415.1706863-1-mpe@ellerman.id.au
2021-11-25powerpc/pseries: delete scanlogNathan Lynch3-200/+0
Remove the pseries scanlog driver. This code supports functions from Power4-era servers that are not present on targets currently supported by arch/powerpc. System manuals from this time have this description: Scan Dump data is a set of chip data that the service processor gathers after a system malfunction. It consists of chip scan rings, chip trace arrays, and Scan COM (SCOM) registers. This data is stored in the scan-log partition of the system’s Nonvolatile Random Access Memory (NVRAM). PowerVM partition firmware development doesn't recognize the associated function call or property, and they don't see any references to them in their codebase. It seems to have been specific to non-virtualized pseries. References: Historical Linux commit from February 2003 (interesting to note this seems to be the source of non-GPL exports for rtas_call etc): https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/?id=f92e361842d5251e50562b09664082dcbd0548bb IntelliStation and pSeries docs which refer to the feature: http://ps-2.retropc.se/basil.holloway/ALL%20PDF/380635.pdf http://ps-2.kev009.com/rs6000/manuals/p/p615-6C3-6E3/6C3_and_6E3_Users_Guide_SA38-0629.pdf Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com> Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210920173203.1800475-1-nathanl@linux.ibm.com
2021-11-25powerpc/powernv: Remove POWER9 PVR version check for entry and uaccess flushesNicholas Piggin1-3/+7
These aren't necessarily POWER9 only, and it's not to say some new vulnerability may not get discovered on other processors for which we would like the flexibility of having the workaround enabled by firmware. Remove the restriction that the workarounds only apply to POWER9. However POWER7 and POWER8 are not affected, and they may not have older firmware that does not advertise this, so clear these workarounds manually. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Joel Stanley <joel@jms.id.au> [mpe: Incorporate changes from Nick, reword comment slightly.] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210503130243.891868-5-npiggin@gmail.com
2021-11-25powerpc/cell: add missing of_node_putJulia Lawall1-0/+1
for_each_node_by_name performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put. A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr): // <smpl> @@ expression e,e1; local idexpression n; @@ for_each_node_by_name(n, e1) { ... when != of_node_put(n) when != e = n ( return n; | + of_node_put(n); ? return ...; ) ... } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1448051604-25256-7-git-send-email-Julia.Lawall@lip6.fr
2021-11-25powerpc/powernv: add missing of_node_putJulia Lawall1-0/+1
for_each_compatible_node performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put. A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr): // <smpl> @@ local idexpression n; expression e; @@ for_each_compatible_node(n,...) { ... ( of_node_put(n); | e = n | + of_node_put(n); ? break; ) ... } ... when != n // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1448051604-25256-4-git-send-email-Julia.Lawall@lip6.fr
2021-11-25powerpc/6xx: add missing of_node_putJulia Lawall1-0/+1
for_each_compatible_node performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put. A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr): // <smpl> @@ expression e; local idexpression n; @@ @@ local idexpression n; expression e; @@ for_each_compatible_node(n,...) { ... ( of_node_put(n); | e = n | + of_node_put(n); ? break; ) ... } ... when != n // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1448051604-25256-2-git-send-email-Julia.Lawall@lip6.fr
2021-11-24powerpc/64s: Keep AMOR SPR a constant ~0 at runtimeNicholas Piggin1-5/+3
This register controls supervisor SPR modifications, and as such is only relevant for KVM. KVM always sets AMOR to ~0 on guest entry, and never restores it coming back out to the host, so it can be kept constant and avoid the mtSPR in KVM guest entry. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211123095231.1036501-10-npiggin@gmail.com
2021-11-24powerpc/64s: Remove WORT SPR from POWER9/10 (take 2)Nicholas Piggin1-1/+0
This removes a missed remnant of the WORT SPR. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211123095231.1036501-2-npiggin@gmail.com
2021-11-15powerpc/pseries/ddw: Do not try direct mapping with persistent memory and ↵Alexey Kardashevskiy1-2/+4
one window There is a possibility of having just one DMA window available with a limited capacity which the existing code does not handle that well. If the window is big enough for the system RAM but less than MAX_PHYSMEM_BITS (which we want when persistent memory is present), we create 1:1 window and leave persistent memory without DMA. This disables 1:1 mapping entirely if there is persistent memory and either: - the huge DMA window does not cover the entire address space; - the default DMA window is removed. This relies on reverted 54fc3c681ded ("powerpc/pseries/ddw: Extend upper limit for huge DMA window for persistent memory") to return the actual amount RAM in ddw_memory_hotplug_max() (posted separately). Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211108040320.3857636-4-aik@ozlabs.ru
2021-11-15powerpc/pseries/ddw: simplify enable_ddw()Alexey Kardashevskiy1-7/+4
This drops rather useless ddw_enabled flag as direct_mapping implies it anyway. While at this, fix indents in enable_ddw(). This should not cause any behavioral change. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211108040320.3857636-3-aik@ozlabs.ru
2021-11-15powerpc/pseries/ddw: Revert "Extend upper limit for huge DMA window for ↵Alexey Kardashevskiy1-9/+0
persistent memory" This reverts commit 54fc3c681ded9437e4548e2501dc1136b23cfa9a which does not allow 1:1 mapping even for the system RAM which is usually possible. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211108040320.3857636-2-aik@ozlabs.ru
2021-11-15powerpc/83xx/mpc8349emitx: Drop unused variableUwe Kleine-König1-1/+0
Commit 5d354dc35ebb ("powerpc/83xx/mpc8349emitx: Make mcu_gpiochip_remove() return void") removed the usage of the variable ret, but failed to remove the variable itself, resulting in: arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c: In function ‘mcu_remove’: arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c:189:6: error: unused variable ‘ret’ [-Werror=unused-variable] 189 | int ret; | ^~~ So remove the variable now. Reported-by: Linux Kernel Functional Testing <lkft@linaro.org> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211110110739.1072634-1-u.kleine-koenig@pengutronix.de
2021-11-08Merge tag 'cxl-for-5.16' of ↵Linus Torvalds1-1/+2
git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl Pull cxl updates from Dan Williams: "More preparation and plumbing work in the CXL subsystem. From an end user perspective the highlight here is lighting up the CXL Persistent Memory related commands (label read / write) with the generic ioctl() front-end in LIBNVDIMM. Otherwise, the ability to instantiate new persistent and volatile memory regions is still on track for v5.17. Summary: - Fix support for platforms that do not enumerate every ACPI0016 (CXL Host Bridge) in the CHBS (ACPI Host Bridge Structure). - Introduce a common pci_find_dvsec_capability() helper, clean up open coded implementations in various drivers. - Add 'cxl_test' for regression testing CXL subsystem ABIs. 'cxl_test' is a module built from tools/testing/cxl/ that mocks up a CXL topology to augment the nascent support for emulation of CXL devices in QEMU. - Convert libnvdimm to use the uuid API. - Complete the definition of CXL namespace labels in libnvdimm. - Tunnel libnvdimm label operations from nd_ioctl() back to the CXL mailbox driver. Enable 'ndctl {read,write}-labels' for CXL. - Continue to sort and refactor functionality into distinct driver and core-infrastructure buckets. For example, mailbox handling is now a generic core capability consumed by the PCI and cxl_test drivers" * tag 'cxl-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (34 commits) ocxl: Use pci core's DVSEC functionality cxl/pci: Use pci core's DVSEC functionality PCI: Add pci_find_dvsec_capability to find designated VSEC cxl/pci: Split cxl_pci_setup_regs() cxl/pci: Add @base to cxl_register_map cxl/pci: Make more use of cxl_register_map cxl/pci: Remove pci request/release regions cxl/pci: Fix NULL vs ERR_PTR confusion cxl/pci: Remove dev_dbg for unknown register blocks cxl/pci: Convert register block identifiers to an enum cxl/acpi: Do not fail cxl_acpi_probe() based on a missing CHBS cxl/pci: Disambiguate cxl_pci further from cxl_mem Documentation/cxl: Add bus internal docs cxl/core: Split decoder setup into alloc + add tools/testing/cxl: Introduce a mock memory device + driver cxl/mbox: Move command definitions to common location cxl/bus: Populate the target list at decoder create tools/testing/cxl: Introduce a mocked-up CXL port hierarchy cxl/pmem: Add support for multiple nvdimm-bridge objects cxl/pmem: Translate NVDIMM label commands to CXL label commands ...
2021-11-06Merge tag 'pci-v5.16-changes' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull pci updates from Bjorn Helgaas: "Enumeration: - Conserve IRQs by setting up portdrv IRQs only when there are users (Jan Kiszka) - Rework and simplify _OSC negotiation for control of PCIe features (Joerg Roedel) - Remove struct pci_dev.driver pointer since it's redundant with the struct device.driver pointer (Uwe Kleine-König) Resource management: - Coalesce contiguous host bridge apertures from _CRS to accommodate BARs that cover more than one aperture (Kai-Heng Feng) Sysfs: - Check CAP_SYS_ADMIN before parsing user input (Krzysztof Wilczyński) - Return -EINVAL consistently from "store" functions (Krzysztof Wilczyński) - Use sysfs_emit() in endpoint "show" functions to avoid buffer overruns (Kunihiko Hayashi) PCIe native device hotplug: - Ignore Link Down/Up caused by resets during error recovery so endpoint drivers can remain bound to the device (Lukas Wunner) Virtualization: - Avoid bus resets on Atheros QCA6174, where they hang the device (Ingmar Klein) - Work around Pericom PI7C9X2G switch packet drop erratum by using store and forward mode instead of cut-through (Nathan Rossi) - Avoid trying to enable AtomicOps on VFs; the PF setting applies to all VFs (Selvin Xavier) MSI: - Document that /sys/bus/pci/devices/.../irq contains the legacy INTx interrupt or the IRQ of the first MSI (not MSI-X) vector (Barry Song) VPD: - Add pci_read_vpd_any() and pci_write_vpd_any() to access anywhere in the possible VPD space; use these to simplify the cxgb3 driver (Heiner Kallweit) Peer-to-peer DMA: - Add (not subtract) the bus offset when calculating DMA address (Wang Lu) ASPM: - Re-enable LTR at Downstream Ports so they don't report Unsupported Requests when reset or hot-added devices send LTR messages (Mingchuang Qiao) Apple PCIe controller driver: - Add driver for Apple M1 PCIe controller (Alyssa Rosenzweig, Marc Zyngier) Cadence PCIe controller driver: - Return success when probe succeeds instead of falling into error path (Li Chen) HiSilicon Kirin PCIe controller driver: - Reorganize PHY logic and add support for external PHY drivers (Mauro Carvalho Chehab) - Support PERST# GPIOs for HiKey970 external PEX 8606 bridge (Mauro Carvalho Chehab) - Add Kirin 970 support (Mauro Carvalho Chehab) - Make driver removable (Mauro Carvalho Chehab) Intel VMD host bridge driver: - If IOMMU supports interrupt remapping, leave VMD MSI-X remapping enabled (Adrian Huang) - Number each controller so we can tell them apart in /proc/interrupts (Chunguang Xu) - Avoid building on UML because VMD depends on x86 bare metal APIs (Johannes Berg) Marvell Aardvark PCIe controller driver: - Define macros for PCI_EXP_DEVCTL_PAYLOAD_* (Pali Rohár) - Set Max Payload Size to 512 bytes per Marvell spec (Pali Rohár) - Downgrade PIO Response Status messages to debug level (Marek Behún) - Preserve CRS SV (Config Request Retry Software Visibility) bit in emulated Root Control register (Pali Rohár) - Fix issue in configuring reference clock (Pali Rohár) - Don't clear status bits for masked interrupts (Pali Rohár) - Don't mask unused interrupts (Pali Rohár) - Avoid code repetition in advk_pcie_rd_conf() (Marek Behún) - Retry config accesses on CRS response (Pali Rohár) - Simplify emulated Root Capabilities initialization (Pali Rohár) - Fix several link training issues (Pali Rohár) - Fix link-up checking via LTSSM (Pali Rohár) - Fix reporting of Data Link Layer Link Active (Pali Rohár) - Fix emulation of W1C bits (Marek Behún) - Fix MSI domain .alloc() method to return zero on success (Marek Behún) - Read entire 16-bit MSI vector in MSI handler, not just low 8 bits (Marek Behún) - Clear Root Port I/O Space, Memory Space, and Bus Master Enable bits at startup; PCI core will set those as necessary (Pali Rohár) - When operating as a Root Port, set class code to "PCI Bridge" instead of the default "Mass Storage Controller" (Pali Rohár) - Add emulation for PCI_BRIDGE_CTL_BUS_RESET since aardvark doesn't implement this per spec (Pali Rohár) - Add emulation of option ROM BAR since aardvark doesn't implement this per spec (Pali Rohár) MediaTek MT7621 PCIe controller driver: - Add MediaTek MT7621 PCIe host controller driver and DT binding (Sergio Paracuellos) Qualcomm PCIe controller driver: - Add SC8180x compatible string (Bjorn Andersson) - Add endpoint controller driver and DT binding (Manivannan Sadhasivam) - Restructure to use of_device_get_match_data() (Prasad Malisetty) - Add SC7280-specific pcie_1_pipe_clk_src handling (Prasad Malisetty) Renesas R-Car PCIe controller driver: - Remove unnecessary includes (Geert Uytterhoeven) Rockchip DesignWare PCIe controller driver: - Add DT binding (Simon Xue) Socionext UniPhier Pro5 controller driver: - Serialize INTx masking/unmasking (Kunihiko Hayashi) Synopsys DesignWare PCIe controller driver: - Run dwc .host_init() method before registering MSI interrupt handler so we can deal with pending interrupts left by bootloader (Bjorn Andersson) - Clean up Kconfig dependencies (Andy Shevchenko) - Export symbols to allow more modular drivers (Luca Ceresoli) TI DRA7xx PCIe controller driver: - Allow host and endpoint drivers to be modules (Luca Ceresoli) - Enable external clock if present (Luca Ceresoli) TI J721E PCIe driver: - Disable PHY when probe fails after initializing it (Christophe JAILLET) MicroSemi Switchtec management driver: - Return error to application when command execution fails because an out-of-band reset has cleared the device BARs, Memory Space Enable, etc (Kelvin Cao) - Fix MRPC error status handling issue (Kelvin Cao) - Mask out other bits when reading of management VEP instance ID (Kelvin Cao) - Return EOPNOTSUPP instead of ENOTSUPP from sysfs show functions (Kelvin Cao) - Add check of event support (Logan Gunthorpe) Miscellaneous: - Remove unused pci_pool wrappers, which have been replaced by dma_pool (Cai Huoqing) - Use 'unsigned int' instead of bare 'unsigned' (Krzysztof Wilczyński) - Use kstrtobool() directly, sans strtobool() wrapper (Krzysztof Wilczyński) - Fix some sscanf(), sprintf() format mismatches (Krzysztof Wilczyński) - Update PCI subsystem information in MAINTAINERS (Krzysztof Wilczyński) - Correct some misspellings (Krzysztof Wilczyński)" * tag 'pci-v5.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (137 commits) PCI: Add ACS quirk for Pericom PI7C9X2G switches PCI: apple: Configure RID to SID mapper on device addition iommu/dart: Exclude MSI doorbell from PCIe device IOVA range PCI: apple: Implement MSI support PCI: apple: Add INTx and per-port interrupt support PCI: kirin: Allow removing the driver PCI: kirin: De-init the dwc driver PCI: kirin: Disable clkreq during poweroff sequence PCI: kirin: Move the power-off code to a common routine PCI: kirin: Add power_off support for Kirin 960 PHY PCI: kirin: Allow building it as a module PCI: kirin: Add MODULE_* macros PCI: kirin: Add Kirin 970 compatible PCI: kirin: Support PERST# GPIOs for HiKey970 external PEX 8606 bridge PCI: apple: Set up reference clocks when probing PCI: apple: Add initial hardware bring-up PCI: of: Allow matching of an interrupt-map local to a PCI device of/irq: Allow matching of an interrupt-map local to an interrupt controller irqdomain: Make of_phandle_args_to_fwspec() generally available PCI: Do not enable AtomicOps on VFs ...
2021-11-06Merge branch 'akpm' (patches from Andrew)Linus Torvalds4-6/+5
Merge misc updates from Andrew Morton: "257 patches. Subsystems affected by this patch series: scripts, ocfs2, vfs, and mm (slab-generic, slab, slub, kconfig, dax, kasan, debug, pagecache, gup, swap, memcg, pagemap, mprotect, mremap, iomap, tracing, vmalloc, pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, tools, memblock, oom-kill, hugetlbfs, migration, thp, readahead, nommu, ksm, vmstat, madvise, memory-hotplug, rmap, zsmalloc, highmem, zram, cleanups, kfence, and damon)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (257 commits) mm/damon: remove return value from before_terminate callback mm/damon: fix a few spelling mistakes in comments and a pr_debug message mm/damon: simplify stop mechanism Docs/admin-guide/mm/pagemap: wordsmith page flags descriptions Docs/admin-guide/mm/damon/start: simplify the content Docs/admin-guide/mm/damon/start: fix a wrong link Docs/admin-guide/mm/damon/start: fix wrong example commands mm/damon/dbgfs: add adaptive_targets list check before enable monitor_on mm/damon: remove unnecessary variable initialization Documentation/admin-guide/mm/damon: add a document for DAMON_RECLAIM mm/damon: introduce DAMON-based Reclamation (DAMON_RECLAIM) selftests/damon: support watermarks mm/damon/dbgfs: support watermarks mm/damon/schemes: activate schemes based on a watermarks mechanism tools/selftests/damon: update for regions prioritization of schemes mm/damon/dbgfs: support prioritization weights mm/damon/vaddr,paddr: support pageout prioritization mm/damon/schemes: prioritize regions within the quotas mm/damon/selftests: support schemes quotas mm/damon/dbgfs: support quotas of schemes ...
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