- 02 Jul, 2019 27 commits
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Nicholas Piggin authored
syscall / hcall entry unnecessarily differs between KVM and non-KVM builds. Move the SMT priority instruction to the same location (after INTERRUPT_TO_KERNEL). Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Final vmlinux is changed only due to change in bug table line numbers. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
Generally, macros that result in instructions being expanded are indented by a tab, and those that don't have no indent. Fix the obvious cases that go contrary to style. No generated code change. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
These are only called in one place each. No generated code change. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
After the previous cleanup, it becomes possible to consolidate some common code outside the runtime alternate patching. Also remove unused labels. This results in some code change, but unchanged runtime instruction sequence. Signed-off-by:
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Nicholas Piggin authored
Many of these macros just specify 1-4 lines which are only called a few times each at most, and often just once. Remove this indirection. No generated code change. Signed-off-by:
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Nicholas Piggin authored
More cases of code insertion via macros that does not add a great deal. All the additions have to be specified in the macro arguments, so they can just as well go after the macro. No generated code change. Signed-off-by:
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Nicholas Piggin authored
The aim is to reduce the amount of indirection it takes to get through the exception handler macros, particularly where it provides little code sharing. No generated code change. Signed-off-by:
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Nicholas Piggin authored
No generated code change. Signed-off-by:
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Nicholas Piggin authored
Move the KVM trap HSRR bit into the KVM handler, which can be conditionally applied when hsrr parameter is set. No generated code change. Signed-off-by:
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Nicholas Piggin authored
Conditionally expand the skip case if it is specified. No generated code change. Signed-off-by:
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Nicholas Piggin authored
Conditionally expand the soft-masking test if a mask is passed in. No generated code change. Signed-off-by:
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Nicholas Piggin authored
Rather than pass in the soft-masking and KVM tests via macro that is passed to another macro to expand it, switch to usig gas macros and conditionally expand the soft-masking and KVM tests. The system reset with its idle test is open coded as it is a one-off. No generated code change. Signed-off-by:
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Nicholas Piggin authored
The sreset handler KVM test theoretically should not depend on P7. In practice KVM now only supports P7 and up so no real bug fix, but this change is made now so the quirk is not propagated through cleanup patches. Signed-off-by:
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Nicholas Piggin authored
- Re-name the macros to _REAL and _VIRT suffixes rather than no and _RELON suffix. - Move the macro definitions together in the file. - Move RELOCATABLE ifdef inside the _VIRT macro. Further consolidation between variants does not buy much here. No generated code change. Signed-off-by:
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Nicholas Piggin authored
Switch to a gas macro that conditionally expands the RI clearing instruction. No generated code change. Signed-off-by:
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Nicholas Piggin authored
Replace all instances of this with gas macros that test the hsrr parameter and use the appropriate register names / labels. No generated code change. Signed-off-by:
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Michael Ellerman authored
Remove SOFTEN_VALUE_0x980, it's been unused since commit dabe859e ("powerpc: Give hypervisor decrementer interrupts their own handler") (Sep 2012). Signed-off-by:
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- 01 Jul, 2019 13 commits
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Nicholas Piggin authored
By convention, all lines should be separated by a semicolons. Last line should have neither semicolon or line wrap. No generated code change. Signed-off-by:
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Christoph Hellwig authored
These two function have never been used anywhere in the kernel tree since they were added to the kernel. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
None of these routines were ever used anywhere in the kernel tree since they were added to the kernel. Signed-off-by:
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Christoph Hellwig authored
These have been unused anywhere in the kernel tree ever since they've been added to the kernel. Signed-off-by:
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Christoph Hellwig authored
This function has never been used anywhere in the kernel tree since it was added to the tree. We also now have proper PCIe P2P APIs in the core kernel, and any new P2P support should be using those. Signed-off-by:
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Naveen N. Rao authored
Commit ed49f7fd ("powerpc/xmon: Disable tracing when entering xmon") added code to disable recording trace entries while in xmon. The commit introduced a variable 'tracing_enabled' to record if tracing was enabled on xmon entry, and used this to conditionally enable tracing during exit from xmon. However, we are not checking the value of 'fromipi' variable in xmon_core() when setting 'tracing_enabled'. Due to this, when secondary cpus enter xmon, they will see tracing as being disabled already and tracing won't be re-enabled on exit. Fix the same. Fixes: ed49f7fd ("powerpc/xmon: Disable tracing when entering xmon") Signed-off-by:
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by:
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Denis Efremov authored
The guard macro __PPC_ASM_H in the header ppc_asm.h doesn't match the #ifndef macro _PPC_ASM_H. The patch makes them the same. Signed-off-by:
Denis Efremov <efremov@linux.com> Signed-off-by:
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Qian Cai authored
The powerpc's flush_cache_vmap() is defined as a macro and never use both of its arguments, so it will generate a compilation warning, lib/ioremap.c: In function 'ioremap_page_range': lib/ioremap.c:203:16: warning: variable 'start' set but not used [-Wunused-but-set-variable] Fix it by making it an inline function. Signed-off-by:
Qian Cai <cai@lca.pw> Signed-off-by:
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Qian Cai authored
The opening comment mark "/**" is reserved for kernel-doc comments, so it will generate a warning with "make W=1". arch/powerpc/kernel/eeh_cache.c:37: warning: cannot understand function prototype: 'struct pci_io_addr_range Since this is not a kernel-doc for the struct below, but rather an overview of this source eeh_cache.c, just use the free-form comments kernel-doc syntax instead. Signed-off-by:
Russell Currey <ruscur@russell.cc> Signed-off-by:
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Christophe Leroy authored
Selects HAVE_C_RECORDMCOUNT to use the C version of the recordmcount intead of the old Perl Version of recordmcount. This should improve build time. It also seems like the old Perl Version misses some calls to _mcount that the C version finds. Signed-off-by:
Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by:
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Naveen N. Rao authored
An impending change to enable HAVE_C_RECORDMCOUNT on powerpc leads to warnings such as the following: # modprobe kprobe_example ftrace-powerpc: Not expected bl: opcode is 3c4c0001 WARNING: CPU: 0 PID: 227 at kernel/trace/ftrace.c:2001 ftrace_bug+0x90/0x318 Modules linked in: CPU: 0 PID: 227 Comm: modprobe Not tainted 5.2.0-rc6-00678-g1c329100b942 #2 NIP: c000000000264318 LR: c00000000025d694 CTR: c000000000f5cd30 REGS: c000000001f2b7b0 TRAP: 0700 Not tainted (5.2.0-rc6-00678-g1c329100b942) MSR: 900000010282b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]> CR: 28228222 XER: 00000000 CFAR: c0000000002642fc IRQMASK: 0 <snip> NIP [c000000000264318] ftrace_bug+0x90/0x318 LR [c00000000025d694] ftrace_process_locs+0x4f4/0x5e0 Call Trace: [c000000001f2ba40] [0000000000000004] 0x4 (unreliable) [c000000001f2bad0] [c00000000025d694] ftrace_process_locs+0x4f4/0x5e0 [c000000001f2bb90] [c00000000020ff10] load_module+0x25b0/0x30c0 [c000000001f2bd00] [c000000000210cb0] sys_finit_module+0xc0/0x130 [c000000001f2be20] [c00000000000bda4] system_call+0x5c/0x70 Instruction dump: 419e0018 2f83ffff 419e00bc 2f83ffea 409e00cc 4800001c 0fe00000 3c62ff96 39000001 39400000 386386d0 480000c4 <0fe00000> 3ce20003 39000001 3c62ff96 ---[ end trace 4c438d5cebf78381 ]--- ftrace failed to modify [<c0080000012a0008>] 0xc0080000012a0008 actual: 01:00:4c:3c Initializing ftrace call sites ftrace record flags: 2000000 (0) expected tramp: c00000000006af4c Looking at the relocation records in __mcount_loc shows a few spurious entries: RELOCATION RECORDS FOR [__mcount_loc]: OFFSET TYPE VALUE 0000000000000000 R_PPC64_ADDR64 .text.unlikely+0x0000000000000008 0000000000000008 R_PPC64_ADDR64 .text.unlikely+0x0000000000000014 0000000000000010 R_PPC64_ADDR64 .text.unlikely+0x0000000000000060 0000000000000018 R_PPC64_ADDR64 .text.unlikely+0x00000000000000b4 0000000000000020 R_PPC64_ADDR64 .init.text+0x0000000000000008 0000000000000028 R_PPC64_ADDR64 .init.text+0x0000000000000014 The first entry in each section is incorrect. Looking at the relocation records, the spurious entries correspond to the R_PPC64_ENTRY records: RELOCATION RECORDS FOR [.text.unlikely]: OFFSET TYPE VALUE 0000000000000000 R_PPC64_REL64 .TOC.-0x0000000000000008 0000000000000008 R_PPC64_ENTRY *ABS* 0000000000000014 R_PPC64_REL24 _mcount <snip> The problem is that we are not validating the return value from get_mcountsym() in sift_rel_mcount(). With this entry, mcountsym is 0, but Elf_r_sym(relp) also ends up being 0. Fix this by ensuring mcountsym is valid before processing the entry. Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Tested-by:
Satheesh Rajendran <sathnaga@linux.vnet.ibm.com> Signed-off-by:
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Nathan Lynch authored
The protocol for suspending or migrating an LPAR requires all present processor threads to enter H_JOIN. So if we have threads offline, we have to temporarily bring them up. This can race with administrator actions such as SMT state changes. As of dfd718a2 ("powerpc/rtas: Fix a potential race between CPU-Offline & Migration"), rtas_ibm_suspend_me() accounts for this, but errors out with -EBUSY for what almost certainly is a transient condition in any reasonable scenario. Callers of rtas_ibm_suspend_me() already retry when -EAGAIN is returned, and it is typical during a migration for that to happen repeatedly for several minutes polling the H_VASI_STATE hcall result before proceeding to the next stage. So return -EAGAIN instead of -EBUSY when this race is encountered. Additionally: logging this event is still appropriate but use pr_info instead of pr_err; and remove use of unlikely() while here as this is not a hot path at all. Fixes: dfd718a2 ("powerpc/rtas: Fix a potential race between CPU-Offline & Migration") Signed-off-by:
Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by:
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Michael Neuling authored
commit 243e2511 ("powerpc/xive: Native exploitation of the XIVE interrupt controller") added an option to turn off Linux native XIVE usage via the xive=off kernel command line option. This documents this option. Signed-off-by:
Michael Neuling <mikey@neuling.org> Reviewed-by:
Cédric Le Goater <clg@kaod.org> Acked-by:
Stewart Smith <stewart@linux.ibm.com> Signed-off-by:
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