- 04 Dec, 2018 11 commits
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Christophe Leroy authored
In order to handle pte_fragment functions with single fragment without adding pte_frag in all mm_context_t, this patch creates two helpers which do nothing on platforms using a single fragment. Signed-off-by:
Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Christophe Leroy authored
This patch move pgtable_t into platform headers. It gets rid of the CONFIG_PPC_64K_PAGES case for PPC64 as nohash/64 doesn't support CONFIG_PPC_64K_PAGES. Reviewed-by:
Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by:
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Christophe Leroy authored
The purpose of this patch is to move platform specific mmu-xxx.h files in platform directories like pte-xxx.h files. In the meantime this patch creates common nohash and nohash/32 + nohash/64 mmu.h files for future common parts. Reviewed-by:
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Christophe Leroy authored
There is no point in taking the page table lock as pte_frag or pmd_frag are always NULL when we have only one fragment. Reviewed-by:
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Christophe Leroy authored
In preparation of next patch which generalises the use of pte_fragment_alloc() for all, this patch moves the related functions in a place that is common to all subarches. The 8xx will need that for supporting 16k pages, as in that mode page tables still have a size of 4k. Since pte_fragment with only once fragment is not different from what is done in the general case, we can easily migrate all subarchs to pte fragments. Reviewed-by:
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Christophe Leroy authored
commit 1bc54c03 ("powerpc: rework 4xx PTE access and TLB miss") introduced non atomic PTE updates and started the work of removing PTE updates in TLB miss handlers, but kept PTE_ATOMIC_UPDATES for the 8xx with the following comment: /* Until my rework is finished, 8xx still needs atomic PTE updates */ commit fe11dc3f ("powerpc/8xx: Update TLB asm so it behaves as linux mm expects") removed all PTE updates done in TLB miss handlers Therefore, atomic PTE updates are not needed anymore for the 8xx Signed-off-by:
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Christophe Leroy authored
BOOK3S/32 cannot be BOOKE, so remove useless code Signed-off-by:
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Stephen Rothwell authored
There is a plan to build the kernel with -Wimplicit-fallthrough and these places in the code produced warnings, but because we build arch/powerpc with -Werror, they became errors. Fix them up. This patch produces no change in behaviour, but should be reviewed in case these are actually bugs not intentional fallthoughs. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Breno Leitao authored
Commit f384796c ("powerpc/mm: Add support for handling > 512TB address in SLB miss") removed function slb_miss_bad_addr(struct pt_regs *regs), but kept its declaration in the prototype file. This patch simply removes the function definition. Signed-off-by:
Breno Leitao <leitao@debian.org> Signed-off-by:
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Breno Leitao authored
When booting a pseries kernel with PREEMPT enabled, it dumps the following warning: BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1 caller is pseries_processor_idle_init+0x5c/0x22c CPU: 13 PID: 1 Comm: swapper/0 Not tainted 4.20.0-rc3-00090-g12201a0128bc-dirty #828 Call Trace: [c000000429437ab0] [c0000000009c8878] dump_stack+0xec/0x164 (unreliable) [c000000429437b00] [c0000000005f2f24] check_preemption_disabled+0x154/0x160 [c000000429437b90] [c000000000cab8e8] pseries_processor_idle_init+0x5c/0x22c [c000000429437c10] [c000000000010ed4] do_one_initcall+0x64/0x300 [c000000429437ce0] [c000000000c54500] kernel_init_freeable+0x3f0/0x500 [c000000429437db0] [c0000000000112dc] kernel_init+0x2c/0x160 [c000000429437e20] [c00000000000c1d0] ret_from_kernel_thread+0x5c/0x6c This happens because the code calls get_lppaca() which calls get_paca() and it checks if preemption is disabled through check_preemption_disabled(). Preemption should be disabled because the per CPU variable may make no sense if there is a preemption (and a CPU switch) after it reads the per CPU data and when it is used. In this device driver specifically, it is not a problem, because this code just needs to have access to one lppaca struct, and it does not matter if it is the current per CPU lppaca struct or not (i.e. when there is a preemption and a CPU migration). That said, the most appropriate fix seems to be related to avoiding the debug_smp_processor_id() call at get_paca(), instead of calling preempt_disable() before get_paca(). Signed-off-by:
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Breno Leitao authored
Currently xmon needs to get devtree_lock (through rtas_token()) during its invocation (at crash time). If there is a crash while devtree_lock is being held, then xmon tries to get the lock but spins forever and never get into the interactive debugger, as in the following case: int *ptr = NULL; raw_spin_lock_irqsave(&devtree_lock, flags); *ptr = 0xdeadbeef; This patch avoids calling rtas_token(), thus trying to get the same lock, at crash time. This new mechanism proposes getting the token at initialization time (xmon_init()) and just consuming it at crash time. This would allow xmon to be possible invoked independent of devtree_lock being held or not. Signed-off-by:
Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by:
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- 26 Nov, 2018 17 commits
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Christophe Leroy authored
PPC_STD_MMU_32 and PPC_STD_MMU are not used anymore. Remove them. Signed-off-by:
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Christophe Leroy authored
Today we have: config PPC_BOOK3S def_bool y depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 config PPC_STD_MMU def_bool y depends on PPC_BOOK3S PPC_STD_MMU is therefore redundant with PPC_BOOK3S. Lets remove it. Signed-off-by: -
Christophe Leroy authored
Today we have: config PPC_BOOK3S_32 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx" [depends on PPC32 within a choice] config PPC_BOOK3S def_bool y depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 config PPC_STD_MMU def_bool y depends on PPC_BOOK3S config PPC_STD_MMU_32 def_bool y depends on PPC_STD_MMU && PPC32 PPC_STD_MMU_32 is therefore redundant with PPC_BOOK3S_32. In order to make the code clearer, lets use preferably PPC_BOOK3S_32. This will allow to remove CONFIG_PPC_STD_MMU_32 in a later patch. Signed-off-by: -
Christophe Leroy authored
asm/book3s/32/pgtable.h is only included when CONFIG_PPC_BOOK3S_32 is set. Whenever CONFIG_PPC_BOOK3S_32 is set, CONFIG_PPC_STD_MMU_32 is set as well. This patch removes useless CONFIG_PPC_STD_MMU_32 #ifdefs Signed-off-by:
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Christophe Leroy authored
CONFIG_6xx is not used anymore. Remove it. Signed-off-by:
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Christophe Leroy authored
Today we have: config PPC_BOOK3S_32 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx" [depends on PPC32 within a choice] config PPC_BOOK3S def_bool y depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 config 6xx def_bool y depends on PPC32 && PPC_BOOK3S 6xx is therefore redundant with PPC_BOOK3S_32. In order to make the code clearer, lets use preferably PPC_BOOK3S_32. This will allow to remove CONFIG_6xx in a later patch. Signed-off-by:
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Christophe Leroy authored
Today, powerpc has three CONFIG labels which means exactly the same: - CONFIG_6xx - CONFIG_PPC_BOOK3S_32 - CONFIG_PPC_STD_MMU_32 By consistency with PPC64, CONFIG_PPC_BOOK3S_32 is the preferred one. Using a label with includes _PPC_ also makes it clearer that it is linked to powerpc. In preparation of the removal of CONFIG_6xx, this patch replaces it by CONFIG_PPC_BOOK3S_32 Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Rob Herring authored
Remove directly accessing device_node.type pointer and use the accessors instead. This will eventually allow removing the type pointer. Signed-off-by:
Rob Herring <robh@kernel.org> Acked-by:
Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by:
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Rob Herring authored
Remove directly accessing device_node.type pointer and use the accessors instead. This will eventually allow removing the type pointer. Signed-off-by:
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Rob Herring authored
In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Convert the open coded iterating thru child nodes to for_each_child_of_node() while we're here. Signed-off-by:
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Rob Herring authored
Remove directly accessing device_node.type pointer and use the accessors instead. This will eventually allow removing the type pointer. Replace the open coded iterating over child nodes with for_each_child_of_node() while we're here. Signed-off-by:
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Rob Herring authored
Remove directly accessing device_node.type pointer and use the accessors instead. This will eventually allow removing the type pointer. In the process, the of_stdout pointer can be used instead of finding the stdout node again. Signed-off-by:
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Satheesh Rajendran authored
This patch adds new defconfig options for powerpc KVM guest and guest.config with additional config symbols enabled, which is to build kernel to boot without initramfs and can be used as place holder for guest specific additional config symbols in future. Signed-off-by:
Satheesh Rajendran <sathnaga@linux.vnet.ibm.com> Signed-off-by:
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Satheesh Rajendran authored
This patch adds missing config symbols for ppc64_defconfig to enable cgroups, memhotplug, numa balancing and XFS in core kernel image. Signed-off-by:
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Satheesh Rajendran authored
CONFIG_NR_CPUS is not set in ppc64_defconfig, So it gets default of 32 which is quite small for modern powerpc systems. Instead set a default of 2048 like other powerpc defconfigs. Signed-off-by:
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Michael Ellerman authored
Update ppc64_defconfig with savedefconfig. No symbols are added or removed, this is 100% movement. Signed-off-by: -
Michael Ellerman authored
In commit 539df7fc ("powerpc/configs: Enable function trace by default") we added: CONFIG_FTRACE=y CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y To ppc64_defconfig, powernv_defconfig and pseries_defconfig. But only CONFIG_FUNCTION_TRACER=y is required, CONFIG_FTRACE is default y if DEBUG_KERNEL is enabled, which we have. And then CONFIG_FUNCTION_GRAPH_TRACER is default y when CONFIG_FUNCTION_TRACER is enabled. The extra symbols were already removed from powernv_defconfig in commit 9a018fb1 ("powerpc/config: powernv_defconfig updates"). Signed-off-by:
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- 25 Nov, 2018 12 commits
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Sabyasachi Gupta authored
Replace dma_alloc_coherent() + memset() with dma_zalloc_coherent(). Signed-off-by:
Sabyasachi Gupta <sabyasachi.linux@gmail.com> Signed-off-by:
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Yue Haibing authored
There is no need to have the 'void __iomem *cpld_base' variable static since new value always be assigned before use it. Signed-off-by:
Yue Haibing <yuehaibing@huawei.com> Signed-off-by:
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YueHaibing authored
There is no need to have the 'intoffset' variable static since new value always be assigned before use it. Signed-off-by:
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by:
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Geert Uytterhoeven authored
Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
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Yangtao Li authored
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by:
Yangtao Li <tiny.windzz@gmail.com> Reviewed-by:
David Gibson <david@gibson.dropbear.id.au> Signed-off-by:
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Yangtao Li authored
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by:
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Daniel Axtens authored
When compiled for 64-bit, the PD_HUGE constant is a 64-bit integer. Mark it as an unsigned long. This squashes over a thousand sparse warnings on my minimal T4240RDB (e6500, ppc64be) config, of the following 2 forms: arch/powerpc/include/asm/hugetlb.h:52:49: warning: constant 0x8000000000000000 is so big it is unsigned long arch/powerpc/include/asm/nohash/pgtable.h:269:49: warning: constant 0x8000000000000000 is so big it is unsigned long Signed-off-by:
Daniel Axtens <dja@axtens.net> Signed-off-by:
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Mathieu Malaterre authored
Type qualifier on return type is ignored. Remove warning in W=1: arch/powerpc/include/asm/book3s/64/pgtable.h:1268:25: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers] Signed-off-by:
Mathieu Malaterre <malat@debian.org> Signed-off-by:
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Mathieu Malaterre authored
When both `CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y` and `CONFIG_UBSAN=y` are set, link step typically produce numberous warnings about orphan section: + powerpc-linux-gnu-ld -EB -m elf32ppc -Bstatic --orphan-handling=warn --build-id --gc-sections -X -o .tmp_vmlinux1 -T ./arch/powerpc/kernel/vmlinux.lds --who le-archive built-in.a --no-whole-archive --start-group lib/lib.a --end-group powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data393' from `init/main.o' being placed in section `.data..Lubsan_data393'. powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data394' from `init/main.o' being placed in section `.data..Lubsan_data394'. ... powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_type11' from `init/main.o' being placed in section `.data..Lubsan_type11'. powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_type12' from `init/main.o' being placed in section `.data..Lubsan_type12'. ... This commit remove those warnings produced at W=1. Link: https://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg135407.htmlSuggested-by:
Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
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Breno Leitao authored
Current core-pkey selftest fails if the test runs without privileges to write into the core pattern file (/proc/sys/kernel/core_pattern). This causes the test to fail and give the impression that the subsystem being tested is broken, when, in fact, the test is being executed without the proper privileges. This is the current error: test: core_pkey tags: git_version:v4.19-3-g9e3363be9bce-dirty Error writing to core_pattern file: Permission denied failure: core_pkey This patch simply skips this test if it runs without the proper privileges, avoiding this undesired failure. CC: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> CC: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by:
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Breno Leitao authored
This patch creates a new macro that skips a test and prints a message to stderr. This is useful to give an idea why the tests is being skipped, other than just skipping the test blindly. Signed-off-by:
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Breno Leitao authored
Some ptrace selftests are passing input operands using a constraint that can allocate any register for the operand, and using these registers on load/store operations. If the register allocated by the compiler happens to be zero (r0), it might cause an invalid memory address access, since load and store operations consider the content of 0x0 address if the base register is r0, instead of the content of the r0 register. For example: r1 := 0xdeadbeef r0 := 0xdeadbeef ld r2, 0(1) /* will load into r2 the content of r1 address */ ld r2, 0(0) /* will load into r2 the content of 0x0 */ In order to avoid this possible problem, the inline assembly constraint should be aware that these registers will be used as a base register, thus, r0 should not be allocated. Other than that, this patch removes inline assembly operands that are not used by the tests. Signed-off-by:
Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by:
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