- 01 Jun, 2018 1 commit
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Vaibhav Jain authored
Currently we see a kernel-oops reported on Power-9 while attaching a context to an AFU, with radix-mode and sysfs attr 'prefault_mode' set to anything other than 'none'. The backtrace of the oops is of this form: Unable to handle kernel paging request for data at address 0x00000080 Faulting instruction address: 0xc00800000bcf3b20 cpu 0x1: Vector: 300 (Data Access) at [c00000037f003800] pc: c00800000bcf3b20: cxl_load_segment+0x178/0x290 [cxl] lr: c00800000bcf39f0: cxl_load_segment+0x48/0x290 [cxl] sp: c00000037f003a80 msr: 9000000000009033 dar: 80 dsisr: 40000000 current = 0xc00000037f280000 paca = 0xc0000003ffffe600 softe: 3 irq_happened: 0x01 pid = 3529, comm = afp_no_int <snip> cxl_prefault+0xfc/0x248 [cxl] process_element_entry_psl9+0xd8/0x1a0 [cxl] cxl_attach_dedicated_process_psl9+0x44/0x130 [cxl] native_attach_process+0xc0/0x130 [cxl] afu_ioctl+0x3f4/0x5e0 [cxl] do_vfs_ioctl+0xdc/0x890 ksys_ioctl+0x68/0xf0 sys_ioctl+0x40/0xa0 system_call+0x58/0x6c The issue is caused as on Power-8 the AFU attr 'prefault_mode' was used to improve initial storage fault performance by prefaulting process segments. However on Power-9 with radix mode we don't have Storage-Segments that we can prefault. Also prefaulting process Pages will be too costly and fine-grained. Hence, since the prefaulting mechanism doesn't makes sense of radix-mode, this patch updates prefault_mode_store() to not allow any other value apart from CXL_PREFAULT_NONE when radix mode is enabled. Fixes: f24be42a ("cxl: Add psl9 specific code") Cc: stable@vger.kernel.org # v4.12+ Signed-off-by:Vaibhav Jain <vaibhav@linux.ibm.com> Acked-by:
Frederic Barrat <fbarrat@linux.vnet.ibm.com> Acked-by:
Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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- 29 May, 2018 1 commit
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Aneesh Kumar K.V authored
arch/powerpc/kernel/stacktrace.c: In function ‘save_stack_trace_tsk_reliable’: arch/powerpc/kernel/stacktrace.c:176:28: error: ‘kretprobe_trampoline’ undeclared if (ip == (unsigned long)kretprobe_trampoline) ^~~~~~~~~~~~~~~~~~~~ Fixes: df78d3f6 ("powerpc/livepatch: Implement reliable stack tracing for the consistency model") Signed-off-by:Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by:
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- 28 May, 2018 4 commits
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Thiago Jung Bauermann authored
This test verifies that the AMR, IAMR and UAMOR are being written to a process' core file. Signed-off-by:
Thiago Jung Bauermann <bauerman@linux.ibm.com> [mpe: Simplify make rule] Signed-off-by:
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Thiago Jung Bauermann authored
This test exercises read and write access to the AMR, IAMR and UAMOR. Signed-off-by:
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Josh Poimboeuf authored
The toc field in the mod_arch_specific struct isn't actually used anywhere, so remove it. Also the ftrace-specific fields are now common between 32-bit and 64-bit, so simplify the struct definition a bit by moving them out of the __powerpc64__ #ifdef. Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by:
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by:
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Akshay Adiga authored
Init all present cpus for deep states instead of "all possible" cpus. Init fails if a possible cpu is guarded. Resulting in making only non-deep states available for cpuidle/hotplug. Stewart says, this means that for single threaded workloads, if you guard out a CPU core you'll not get WoF (Workload Optimised Frequency), which means that performance goes down when you wouldn't expect it to. Fixes: 77b54e9f ("powernv/powerpc: Add winkle support for offline cpus") Cc: stable@vger.kernel.org # v3.19+ Signed-off-by:
Akshay Adiga <akshay.adiga@linux.vnet.ibm.com> Signed-off-by:
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- 25 May, 2018 23 commits
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Madhavan Srinivasan authored
Comment explanning the raw event code encoding for Power8 was moved to isa207_common.h file when re-factoring the code to support power9. But then Power9 pmu branched out due to changes specific to power9. So move the encoding comment back to power8-pmu.c Just comment movement and no logic change. Fixes: 4d3576b2 ('powerpc/perf: factor out power8 pmu macros and defines') Signed-off-by:
Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by:
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Mathieu Malaterre authored
The header file <asm/switch_to.h> was missing from the includes. Fix the following warning, treated as error with W=1: arch/powerpc/kernel/vecemu.c:260:5: error: no previous prototype for ‘emulate_altivec’ [-Werror=missing-prototypes] Signed-off-by:
Mathieu Malaterre <malat@debian.org> Signed-off-by:
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Mathieu Malaterre authored
The header file <linux/syscalls.h> was missing from the includes. Fix the following warning, treated as error with W=1: arch/powerpc/kernel/pci_32.c:286:6: error: no previous prototype for ‘sys_pciconfig_iobase’ [-Werror=missing-prototypes] Signed-off-by:
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Mathieu Malaterre authored
Add a missing include <platforms/chrp/chrp.h>. These functions can all be static, make it so. Fix warnings treated as errors with W=1: arch/powerpc/platforms/chrp/time.c:41:13: error: no previous prototype for ‘chrp_time_init’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/time.c:66:5: error: no previous prototype for ‘chrp_cmos_clock_read’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/time.c:74:6: error: no previous prototype for ‘chrp_cmos_clock_write’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/time.c:86:5: error: no previous prototype for ‘chrp_set_rtc_time’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/time.c:130:6: error: no previous prototype for ‘chrp_get_rtc_time’ [-Werror=missing-prototypes] Signed-off-by:
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Mathieu Malaterre authored
These functions can all be static, make it so. Fix warnings treated as errors with W=1: arch/powerpc/kernel/tau_6xx.c:53:6: error: no previous prototype for ‘set_thresholds’ [-Werror=missing-prototypes] arch/powerpc/kernel/tau_6xx.c:73:6: error: no previous prototype for ‘TAUupdate’ [-Werror=missing-prototypes] arch/powerpc/kernel/tau_6xx.c:208:13: error: no previous prototype for ‘TAU_init_smp’ [-Werror=missing-prototypes] arch/powerpc/kernel/tau_6xx.c:220:12: error: no previous prototype for ‘TAU_init’ [-Werror=missing-prototypes] arch/powerpc/kernel/tau_6xx.c:126:6: error: no previous prototype for ‘TAUException’ [-Werror=missing-prototypes] Signed-off-by:
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Mathieu Malaterre authored
This function can be static, make it so, this fix a warning treated as error with W=1: arch/powerpc/kernel/btext.c:173:5: error: no previous prototype for ‘btext_initialize’ [-Werror=missing-prototypes] Signed-off-by:
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Mathieu Malaterre authored
Some function prototypes and body for Thermal Assist Units were not in sync. Update the function definition to match the existing function declaration found in `setup-common.c`, changing an `int` return type to a `u32` return type. Move the prototypes to a header file. Fix the following warnings, treated as error with W=1: arch/powerpc/kernel/tau_6xx.c:257:5: error: no previous prototype for ‘cpu_temp_both’ [-Werror=missing-prototypes] arch/powerpc/kernel/tau_6xx.c:262:5: error: no previous prototype for ‘cpu_temp’ [-Werror=missing-prototypes] arch/powerpc/kernel/tau_6xx.c:267:5: error: no previous prototype for ‘tau_interrupts’ [-Werror=missing-prototypes] Compile tested with CONFIG_TAU_INT. Suggested-by:
Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by:
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Mathieu Malaterre authored
Add one missing prototype for function rh_dump_blk. Fix warning treated as error in W=1: arch/powerpc/lib/rheap.c:740:6: error: no previous prototype for ‘rh_dump_blk’ [-Werror=missing-prototypes] Suggested-by:
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Mathieu Malaterre authored
The function prototypes were declared within a `#ifdef CONFIG_PPC_LITE5200` block which would prevent them from being visible when compiling `mpc52xx_pm.c`. Move the prototypes outside of the `#ifdef` block to fix the following warnings treated as errors with W=1: arch/powerpc/platforms/52xx/mpc52xx_pm.c:58:5: error: no previous prototype for ‘mpc52xx_pm_prepare’ [-Werror=missing-prototypes] arch/powerpc/platforms/52xx/mpc52xx_pm.c:113:5: error: no previous prototype for ‘mpc52xx_pm_enter’ [-Werror=missing-prototypes] arch/powerpc/platforms/52xx/mpc52xx_pm.c:181:6: error: no previous prototype for ‘mpc52xx_pm_finish’ [-Werror=missing-prototypes] Suggested-by:
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Mathieu Malaterre authored
Add a missing prototype for function `note_bootable_part` to silence a warning treated as error with W=1: arch/powerpc/platforms/powermac/setup.c:361:12: error: no previous prototype for ‘note_bootable_part’ [-Werror=missing-prototypes] Suggested-by:
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Mathieu Malaterre authored
The pmac_pfunc_base_install prototype was declared in powermac/smp.c since function was used there, move it to pmac_pfunc.h header to be visible in pfunc_base.c. Fix a warning treated as error with W=1: arch/powerpc/platforms/powermac/pfunc_base.c:330:12: error: no previous prototype for ‘pmac_pfunc_base_install’ [-Werror=missing-prototypes] Suggested-by:
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Mathieu Malaterre authored
These functions can all be static, make it so. Fix warnings treated as errors with W=1: arch/powerpc/platforms/chrp/pci.c:34:5: error: no previous prototype for ‘gg2_read_config’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/pci.c:61:5: error: no previous prototype for ‘gg2_write_config’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/pci.c:97:5: error: no previous prototype for ‘rtas_read_config’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/pci.c:112:5: error: no previous prototype for ‘rtas_write_config’ [-Werror=missing-prototypes] Signed-off-by:
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Mathieu Malaterre authored
Since the value of x is never intended to be read, declare it with gcc attribute as unused. Fix warning treated as error with W=1: arch/powerpc/platforms/powermac/bootx_init.c:471:21: error: variable ‘x’ set but not used [-Werror=unused-but-set-variable] Suggested-by:
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Mathieu Malaterre authored
Remove variable declaration idu_size and associated code since not used. These functions can all be static, make it so. Fix warnings treated as errors with W=1: arch/powerpc/platforms/chrp/setup.c:97:6: error: no previous prototype for ‘chrp_show_cpuinfo’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/setup.c:302:13: error: no previous prototype for ‘chrp_setup_arch’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/setup.c:385:16: error: variable ‘idu_size’ set but not used [-Werror=unused-but-set-variable] arch/powerpc/platforms/chrp/setup.c:526:13: error: no previous prototype for ‘chrp_init_IRQ’ [-Werror=missing-prototypes] arch/powerpc/platforms/chrp/setup.c:559:1: error: no previous prototype for ‘chrp_init2’ [-Werror=missing-prototypes] Suggested-by:
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Mathieu Malaterre authored
The function hlwd_pic_init can be made static, so do it. Fix the following warning treated as error (W=1): ../arch/powerpc/platforms/embedded6xx/hlwd-pic.c:158:20: error: no previous prototype for ‘hlwd_pic_init’ [-Werror=missing-prototypes] Signed-off-by:
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Mathieu Malaterre authored
In commit 7a22d632 ("powerpc/mm/radix: Update command line parsing for disable_radix") an `if` statement was added for a possible empty body (prom_debug). Fix the following warning, treated as error with W=1: arch/powerpc/kernel/prom_init.c:656:46: error: suggest braces around empty body in an ‘if’ statement [-Werror=empty-body] Suggested-by:
Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
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Mathieu Malaterre authored
Trivial fix to remove the following sparse warnings: arch/powerpc/kernel/module_32.c:112:74: warning: Using plain integer as NULL pointer arch/powerpc/kernel/module_32.c:117:74: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:1155:28: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:1230:20: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:1385:36: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:1752:23: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:2084:19: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:2110:32: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:2167:19: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:2183:19: warning: Using plain integer as NULL pointer drivers/macintosh/via-pmu.c:277:20: warning: Using plain integer as NULL pointer arch/powerpc/platforms/powermac/setup.c:155:67: warning: Using plain integer as NULL pointer arch/powerpc/platforms/powermac/setup.c:247:27: warning: Using plain integer as NULL pointer arch/powerpc/platforms/powermac/setup.c:249:27: warning: Using plain integer as NULL pointer arch/powerpc/platforms/powermac/setup.c:252:37: warning: Using plain integer as NULL pointer arch/powerpc/mm/tlb_hash32.c:127:21: warning: Using plain integer as NULL pointer arch/powerpc/mm/tlb_hash32.c:148:21: warning: Using plain integer as NULL pointer arch/powerpc/mm/tlb_hash32.c:44:21: warning: Using plain integer as NULL pointer arch/powerpc/mm/tlb_hash32.c:57:21: warning: Using plain integer as NULL pointer arch/powerpc/mm/tlb_hash32.c:87:21: warning: Using plain integer as NULL pointer arch/powerpc/kernel/btext.c:160:31: warning: Using plain integer as NULL pointer arch/powerpc/kernel/btext.c:167:22: warning: Using plain integer as NULL pointer arch/powerpc/kernel/btext.c:274:21: warning: Using plain integer as NULL pointer arch/powerpc/kernel/btext.c:285:31: warning: Using plain integer as NULL pointer arch/powerpc/include/asm/hugetlb.h:204:16: warning: Using plain integer as NULL pointer arch/powerpc/mm/ppc_mmu_32.c:170:21: warning: Using plain integer as NULL pointer arch/powerpc/platforms/powermac/pci.c:1227:23: warning: Using plain integer as NULL pointer arch/powerpc/platforms/powermac/pci.c:65:24: warning: Using plain integer as NULL pointer Also use `--fix` command line option from `script/checkpatch --strict` to remove the following: CHECK: Comparison to NULL could be written "!dispDeviceBase" #72: FILE: arch/powerpc/kernel/btext.c:160: + if (dispDeviceBase == NULL) CHECK: Comparison to NULL could be written "!vbase" #80: FILE: arch/powerpc/kernel/btext.c:167: + if (vbase == NULL) CHECK: Comparison to NULL could be written "!base" #89: FILE: arch/powerpc/kernel/btext.c:274: + if (base == NULL) CHECK: Comparison to NULL could be written "!dispDeviceBase" #98: FILE: arch/powerpc/kernel/btext.c:285: + if (dispDeviceBase == NULL) CHECK: Comparison to NULL could be written "strstr" #117: FILE: arch/powerpc/kernel/module_32.c:117: + if (strstr(secstrings + sechdrs[i].sh_name, ".debug") != NULL) CHECK: Comparison to NULL could be written "!Hash" #130: FILE: arch/powerpc/mm/ppc_mmu_32.c:170: + if (Hash == NULL) CHECK: Comparison to NULL could be written "Hash" #143: FILE: arch/powerpc/mm/tlb_hash32.c:44: + if (Hash != NULL) { CHECK: Comparison to NULL could be written "!Hash" #152: FILE: arch/powerpc/mm/tlb_hash32.c:57: + if (Hash == NULL) { CHECK: Comparison to NULL could be written "!Hash" #161: FILE: arch/powerpc/mm/tlb_hash32.c:87: + if (Hash == NULL) { CHECK: Comparison to NULL could be written "!Hash" #170: FILE: arch/powerpc/mm/tlb_hash32.c:127: + if (Hash == NULL) { CHECK: Comparison to NULL could be written "!Hash" #179: FILE: arch/powerpc/mm/tlb_hash32.c:148: + if (Hash == NULL) { ERROR: space required after that ';' (ctx:VxV) #192: FILE: arch/powerpc/platforms/powermac/pci.c:65: + for (; node != NULL;node = node->sibling) { CHECK: Comparison to NULL could be written "node" #192: FILE: arch/powerpc/platforms/powermac/pci.c:65: + for (; node != NULL;node = node->sibling) { CHECK: Comparison to NULL could be written "!region" #201: FILE: arch/powerpc/platforms/powermac/pci.c:1227: + if (region == NULL) CHECK: Comparison to NULL could be written "of_get_property" #214: FILE: arch/powerpc/platforms/powermac/setup.c:155: + if (of_get_property(np, "cache-unified", NULL) != NULL && dc) { CHECK: Comparison to NULL could be written "!np" #223: FILE: arch/powerpc/platforms/powermac/setup.c:247: + if (np == NULL) CHECK: Comparison to NULL could be written "np" #226: FILE: arch/powerpc/platforms/powermac/setup.c:249: + if (np != NULL) { CHECK: Comparison to NULL could be written "l2cr" #230: FILE: arch/powerpc/platforms/powermac/setup.c:252: + if (l2cr != NULL) { CHECK: Comparison to NULL could be written "via" #243: FILE: drivers/macintosh/via-pmu.c:277: + if (via != NULL) CHECK: Comparison to NULL could be written "current_req" #252: FILE: drivers/macintosh/via-pmu.c:1155: + if (current_req != NULL) { CHECK: Comparison to NULL could be written "!req" #261: FILE: drivers/macintosh/via-pmu.c:1230: + if (req == NULL || pmu_state != idle CHECK: Comparison to NULL could be written "!req" #270: FILE: drivers/macintosh/via-pmu.c:1385: + if (req == NULL) { CHECK: Comparison to NULL could be written "!pp" #288: FILE: drivers/macintosh/via-pmu.c:2084: + if (pp == NULL) CHECK: Comparison to NULL could be written "!pp" #297: FILE: drivers/macintosh/via-pmu.c:2110: + if (count < 1 || pp == NULL) CHECK: Comparison to NULL could be written "!pp" #306: FILE: drivers/macintosh/via-pmu.c:2167: + if (pp == NULL) CHECK: Comparison to NULL could be written "pp" #315: FILE: drivers/macintosh/via-pmu.c:2183: + if (pp != NULL) { Link: https://github.com/linuxppc/linux/issues/37Signed-off-by: -
Mathieu Malaterre authored
Some functions prototypes were missing for the non-altivec code. Add the missing prototypes in a new header file, fix warnings treated as errors with W=1: arch/powerpc/lib/xor_vmx_glue.c:18:6: error: no previous prototype for ‘xor_altivec_2’ [-Werror=missing-prototypes] arch/powerpc/lib/xor_vmx_glue.c:29:6: error: no previous prototype for ‘xor_altivec_3’ [-Werror=missing-prototypes] arch/powerpc/lib/xor_vmx_glue.c:40:6: error: no previous prototype for ‘xor_altivec_4’ [-Werror=missing-prototypes] arch/powerpc/lib/xor_vmx_glue.c:52:6: error: no previous prototype for ‘xor_altivec_5’ [-Werror=missing-prototypes] The prototypes were already present in <asm/xor.h> but this header file is meant to be included after <include/linux/raid/xor.h>. Trying to re-use <asm/xor.h> directly would lead to warnings such as: arch/powerpc/include/asm/xor.h:39:15: error: variable ‘xor_block_altivec’ has initializer but incomplete type Trying to re-use <asm/xor.h> after <include/linux/raid/xor.h> in xor_vmx_glue.c would in turn trigger the following warnings: include/asm-generic/xor.h:688:34: error: ‘xor_block_32regs’ defined but not used [-Werror=unused-variable] Signed-off-by:
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Mathieu Malaterre authored
__printf is useful to verify format and arguments. Fix arg mismatch reported by gcc, remove the following warnings (with W=1): arch/powerpc/kernel/prom_init.c:1467:31: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1471:31: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1504:33: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1505:33: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1506:33: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1507:33: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1508:33: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1509:33: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:1975:39: error: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 2 has type ‘unsigned int’ arch/powerpc/kernel/prom_init.c:1986:27: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:2567:38: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:2567:46: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:2569:38: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ arch/powerpc/kernel/prom_init.c:2569:46: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long unsigned int’ The patch also include arg mismatch fix for case with #define DEBUG_PROM (warning not listed here). This patch fix also the following warnings revealed by checkpatch: WARNING: Prefer using '"%s...", __func__' to using 'alloc_up', this function's name, in a string #101: FILE: arch/powerpc/kernel/prom_init.c:1235: + prom_debug("alloc_up(%lx, %lx)\n", size, align); and WARNING: Prefer using '"%s...", __func__' to using 'alloc_down', this function's name, in a string #138: FILE: arch/powerpc/kernel/prom_init.c:1278: + prom_debug("alloc_down(%lx, %lx, %s)\n", size, align, Signed-off-by: -
Michael Ellerman authored
The set of paca fields we dump in xmon has gotten somewhat out of date. Update to add some recently added fields. Signed-off-by: -
Michael Ellerman authored
We've added some fields with longer names since we originally wrote this, so the fields are no longer lined up. Adjust the widths to make it all look nice again, eg: 0:mon> dp paca for cpu 0x0 @ c000000001fa0000: possible = yes ... slb_shadow [0] = 0xc000000008000000 0x400ea1b217000500 slb_shadow [1] = 0xd000000008000001 0x400d43642f000510 ... rfi_flush_fallback_area = c0000000fff80000 (0xcc8) ... accounting.starttime_user = 0x51582f07 (0xae8) Signed-off-by: -
Mathieu Malaterre authored
This allows the compiler to verify the format strings vs the types of the arguments. Update the other prototype declarations in asm/xmon.h. Silence warnings (triggered at W=1) by adding relevant __printf attribute. Move #define at bottom of the file to prevent conflict with gcc attribute. Solves the original warning: arch/powerpc/xmon/nonstdio.c:178:2: error: function might be possible candidate for ‘gnu_printf’ format attribute In turn this uncovered many formatting errors in xmon.c, all fixed in this patch. Signed-off-by:
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Michael Ellerman authored
In dump_one_paca() the DUMP macro unconditionally prepends '#' to the printf format specifier. In most cases we're using either 'x' or 'lx' etc. and that is OK. But for 'p' and other formats using '#' is actually undefined, and once we enable printf() checking for xmon_printf() we will get warnings from the compiler. So just have each usage specify the full format, that way we can omit '#' when it's inappropriate. Signed-off-by:
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- 24 May, 2018 6 commits
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Michal Suchanek authored
When single-stepping kernel code from xmon without a debug hook enabled the kernel crashes. This can happen when kernel starts with xmon on crash disabled but xmon is entered using sysrq. Call force_enable_xmon when single-stepping in xmon to install the xmon debug hooks. Fixes: e1368d0c ("powerpc/xmon: Setup debugger hooks when first break-point is set") Signed-off-by:
Michal Suchanek <msuchanek@suse.de> Reviewed-by:
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Christophe Leroy authored
New binutils generate the following warning AS arch/powerpc/kernel/head_8xx.o arch/powerpc/kernel/head_8xx.S: Assembler messages: arch/powerpc/kernel/head_8xx.S:916: Warning: invalid register expression This patch fixes it. Signed-off-by:
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Michael Neuling authored
This test the ptrace hw breakpoints via PTRACE_SET_DEBUGREG and PPC_PTRACE_SETHWDEBUG. This test was use to find the bugs fixed by these recent commits: 4f7c06e2 powerpc/ptrace: Fix setting 512B aligned breakpoints with PTRACE_SET_DEBUGREG cd6ef7ee powerpc/ptrace: Fix enforcement of DAWR constraints Signed-off-by:
Michael Neuling <mikey@neuling.org> [mpe: Add SPDX tag, clang format it] Signed-off-by:
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Michael Neuling authored
Signed-off-by:
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Christophe Leroy authored
Commit a7a9dcd8 ("powerpc: Avoid taking a data miss on every userspace instruction miss") has shown that limiting the read of faulting instruction to likely cases improves performance. This patch goes further into this direction by limiting the read of the faulting instruction to the only cases where it is likely needed. On an MPC885, with the same benchmark app as in the commit referred above, we see a reduction of about 3900 dTLB misses (approx 3%): Before the patch: Performance counter stats for './fault 500' (10 runs): 683033312 cpu-cycles ( +- 0.03% ) 134538 dTLB-load-misses ( +- 0.03% ) 46099 iTLB-load-misses ( +- 0.02% ) 19681 faults ( +- 0.02% ) 5.389747878 seconds time elapsed ( +- 0.06% ) With the patch: Performance counter stats for './fault 500' (10 runs): 682112862 cpu-cycles ( +- 0.03% ) 130619 dTLB-load-misses ( +- 0.03% ) 46073 iTLB-load-misses ( +- 0.05% ) 19681 faults ( +- 0.01% ) 5.381342641 seconds time elapsed ( +- 0.07% ) The proper work of the huge stack expansion was tested with the following app: int main(int argc, char **argv) { char buf[1024 * 1025]; sprintf(buf, "Hello world !\n"); printf(buf); exit(0); } Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> [mpe: Add include of pagemap.h to fix build errors] Signed-off-by:
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Christophe Leroy authored
Use symbolic names defined in asm/ppc-opcode.h instead of hardcoded values. Signed-off-by:
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- 21 May, 2018 5 commits
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Shilpasri G Bhat authored
This patch exports the accumulated power numbers of each power sensor maintained by OCC. Signed-off-by:
Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Acked-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
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Shilpasri G Bhat authored
The firmware has supported for reading sensor values of size u32. This patch adds support to use newer firmware functions which allows to read the sensors of size u64. Signed-off-by:
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Shilpasri G Bhat authored
This patch adds support to read 64-bit sensor values. This method is used to read energy sensors and counters which are of type u64. Signed-off-by:
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Michael Neuling authored
Paste on POWER9 only works on accelerators and no longer on real memory. Hence this test is broken so remove it. Signed-off-by:
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Peter Rosin authored
The sanctioned compatible is "nxp,pca9547". Signed-off-by:
Peter Rosin <peda@axentia.se> Signed-off-by:
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