- 14 Jan, 2021 23 commits
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Guo Ren authored
This enables the use of per-task stack canary values if GCC has support for emitting the stack canary reference relative to the value of tp, which holds the task struct pointer in the riscv kernel. After compare arm64 and x86 implementations, seems arm64's is more flexible and readable. The key point is how gcc get the offset of stack_canary from gs/el0_sp. x86: Use a fix offset from gs, not flexible. struct fixed_percpu_data { /* * GCC hardcodes the stack canary as %gs:40. Since the * irq_stack is the object at %gs:0, we reserve the bottom * 48 bytes of the irq stack for the canary. */ char gs_base[40]; // :( unsigned long stack_canary; }; arm64: Use -mstack-protector-guard-offset & guard-reg gcc options: -mstack-protector-guard=sysreg -mstack-protector-guard-reg=sp_el0 -mstack-protector-guard-offset=xxx riscv: Use -mstack-protector-guard-offset & guard-reg gcc options: -mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-guard-offset=xxx GCC's implementation has been merged: commit c931e8d5a96463427040b0d11f9c4352ac22b2b0 Author: Cooper Qu <cooper.qu@linux.alibaba.com> Date: Mon Jul 13 16:15:08 2020 +0800 RISC-V: Add support for TLS stack protector canary access In the end, these codes are inserted by gcc before return: * 0xffffffe00020b396 <+120>: ld a5,1008(tp) # 0x3f0 * 0xffffffe00020b39a <+124>: xor a5,a5,a4 * 0xffffffe00020b39c <+126>: mv a0,s5 * 0xffffffe00020b39e <+128>: bnez a5,0xffffffe00020b61c <_do_fork+766> 0xffffffe00020b3a2 <+132>: ld ra,136(sp) 0xffffffe00020b3a4 <+134>: ld s0,128(sp) 0xffffffe00020b3a6 <+136>: ld s1,120(sp) 0xffffffe00020b3a8 <+138>: ld s2,112(sp) 0xffffffe00020b3aa <+140>: ld s3,104(sp) 0xffffffe00020b3ac <+142>: ld s4,96(sp) 0xffffffe00020b3ae <+144>: ld s5,88(sp) 0xffffffe00020b3b0 <+146>: ld s6,80(sp) 0xffffffe00020b3b2 <+148>: ld s7,72(sp) 0xffffffe00020b3b4 <+150>: addi sp,sp,144 0xffffffe00020b3b6 <+152>: ret ... * 0xffffffe00020b61c <+766>: auipc ra,0x7f8 * 0xffffffe00020b620 <+770>: jalr -1764(ra) # 0xffffffe000a02f38 <__stack_chk_fail> Signed-off-by:Guo Ren <guoren@linux.alibaba.com> Signed-off-by:
Cooper Qu <cooper.qu@linux.alibaba.com> Reviewed-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
Palmer Dabbelt <palmerdabbelt@google.com>
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Guo Ren authored
Inspired by the commit 42d038c4 ("arm64: Add support for function error injection"), this patch supports function error injection for riscv. This patch mainly support two functions: one is regs_set_return_value() which is used to overwrite the return value; the another function is override_function_with_return() which is to override the probed function returning and jump to its caller. Test log: cd /sys/kernel/debug/fail_function echo sys_clone > inject echo 100 > probability echo 1 > interval ls / [ 313.176875] FAULT_INJECTION: forcing a failure. [ 313.176875] name fail_function, interval 1, probability 100, space 0, times 1 [ 313.184357] CPU: 0 PID: 87 Comm: sh Not tainted 5.8.0-rc5-00007-g6a758cc #117 [ 313.187616] Call Trace: [ 313.189100] [<ffffffe0002036b6>] walk_stackframe+0x0/0xc2 [ 313.191626] [<ffffffe00020395c>] show_stack+0x40/0x4c [ 313.193927] [<ffffffe000556c60>] dump_stack+0x7c/0x96 [ 313.194795] [<ffffffe0005522e8>] should_fail+0x140/0x142 [ 313.195923] [<ffffffe000299ffc>] fei_kprobe_handler+0x2c/0x5a [ 313.197687] [<ffffffe0009e2ec4>] kprobe_breakpoint_handler+0xb4/0x18a [ 313.200054] [<ffffffe00020357e>] do_trap_break+0x36/0xca [ 313.202147] [<ffffffe000201bca>] ret_from_exception+0x0/0xc [ 313.204556] [<ffffffe000201bbc>] ret_from_syscall+0x0/0x2 -sh: can't fork: Invalid argument Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Cc: Palmer Dabbelt <palmerdabbelt@google.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Signed-off-by:
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Guo Ren authored
This patch adds support for uprobes on riscv architecture. Just like kprobe, it support single-step and simulate instructions. Signed-off-by:
Pekka Enberg <penberg@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by:
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Guo Ren authored
This patch adds support for kprobes on ftrace call sites to avoids much of the overhead with regular kprobes. Try it with simple steps: echo 'p:myprobe sys_clone a0=%a0 a1=%a1 stack_val=+4($stack)' > /sys/kernel/de bug/tracing/kprobe_events echo 1 > /sys/kernel/debug/tracing/events/kprobes/enable cat /sys/kernel/debug/tracing/trace tracer: nop entries-in-buffer/entries-written: 1/1 #P:1 _-----=> irqs-off / _----=> need-resched | / _---=> hardirq/softirq || / _--=> preempt-depth ||| / delay TASK-PID CPU# |||| TIMESTAMP FUNCTION | | | |||| | | sh-92 [000] .... 369.899962: myprobe: (sys_clone+0x0/0x28) a0=0x1200011 a1=0x0 stack_val=0x201c20ffffffe0 cat /sys/kernel/debug/kprobes/list ffffffe00020b584 k sys_clone+0x0 [FTRACE] ^^^^^^ Signed-off-by: -
Guo Ren authored
This patch enables "kprobe & kretprobe" to work with ftrace interface. It utilized software breakpoint as single-step mechanism. Some instructions which can't be single-step executed must be simulated in kernel execution slot, such as: branch, jal, auipc, la ... Some instructions should be rejected for probing and we use a blacklist to filter, such as: ecall, ebreak, ... We use ebreak & c.ebreak to replace origin instruction and the kprobe handler prepares an executable memory slot for out-of-line execution with a copy of the original instruction being probed. In execution slot we add ebreak behind original instruction to simulate a single-setp mechanism. The patch is based on packi's work [1] and csky's work [2]. - The kprobes_trampoline.S is all from packi's patch - The single-step mechanism is new designed for riscv without hw single-step trap - The simulation codes are from csky - Frankly, all codes refer to other archs' implementation [1] https://lore.kernel.org/linux-riscv/20181113195804.22825-1-me@packi.ch/ [2] https://lore.kernel.org/linux-csky/20200403044150.20562-9-guoren@kernel.org/Signed-off-by:
Patrick Stählin <me@packi.ch> Signed-off-by:
Zong Li <zong.li@sifive.com> Reviewed-by:
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Guo Ren authored
This patch changes the current detour mechanism of dynamic ftrace which has been discussed during LPC 2020 RISCV-MC [1]. Before the patch, we used mcount for detour: <funca>: addi sp,sp,-16 sd ra,8(sp) sd s0,0(sp) addi s0,sp,16 mv a5,ra mv a0,a5 auipc ra,0x0 -> nop jalr -296(ra) <_mcount@plt> ->nop ... After the patch, we use nop call site area for detour: <funca>: nop -> REG_S ra, -SZREG(sp) nop -> auipc ra, 0x? nop -> jalr ?(ra) nop -> REG_L ra, -SZREG(sp) ... The mcount mechanism is mixed with gcc function prologue which is not very clear. The patchable function entry just put 16 bytes nop before the front of the function prologue which could be filled with a separated detour mechanism. [1] https://www.linuxplumbersconf.org/event/7/contributions/807/Signed-off-by:
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Guo Ren authored
Just like arm64, we can't trace the function in the patch_text path. Here is the bug log: [ 45.234334] Unable to handle kernel paging request at virtual address ffffffd38ae80900 [ 45.242313] Oops [#1] [ 45.244600] Modules linked in: [ 45.247678] CPU: 0 PID: 11 Comm: migration/0 Not tainted 5.9.0-00025-g9b7db83-dirty #215 [ 45.255797] epc: ffffffe00021689a ra : ffffffe00021718e sp : ffffffe01afabb58 [ 45.262955] gp : ffffffe00136afa0 tp : ffffffe01af94d00 t0 : 0000000000000002 [ 45.270200] t1 : 0000000000000000 t2 : 0000000000000001 s0 : ffffffe01afabc08 [ 45.277443] s1 : ffffffe0013718a8 a0 : 0000000000000000 a1 : ffffffe01afabba8 [ 45.284686] a2 : 0000000000000000 a3 : 0000000000000000 a4 : c4c16ad38ae80900 [ 45.291929] a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000052464e43 [ 45.299173] s2 : 0000000000000001 s3 : ffffffe000206a60 s4 : ffffffe000206a60 [ 45.306415] s5 : 00000000000009ec s6 : ffffffe0013718a8 s7 : c4c16ad38ae80900 [ 45.313658] s8 : 0000000000000004 s9 : 0000000000000001 s10: 0000000000000001 [ 45.320902] s11: 0000000000000003 t3 : 0000000000000001 t4 : ffffffffd192fe79 [ 45.328144] t5 : ffffffffb8f80000 t6 : 0000000000040000 [ 45.333472] status: 0000000200000100 badaddr: ffffffd38ae80900 cause: 000000000000000f [ 45.341514] ---[ end trace d95102172248fdcf ]--- [ 45.346176] note: migration/0[11] exited with preempt_count 1 (gdb) x /2i $pc => 0xffffffe00021689a <__do_proc_dointvec+196>: sd zero,0(s7) 0xffffffe00021689e <__do_proc_dointvec+200>: li s11,0 (gdb) bt 0 __do_proc_dointvec (tbl_data=0x0, table=0xffffffe01afabba8, write=0, buffer=0x0, lenp=0x7bf897061f9a0800, ppos=0x4, conv=0x0, data=0x52464e43) at kernel/sysctl.c:581 1 0xffffffe00021718e in do_proc_dointvec (data=<optimized out>, conv=<optimized out>, ppos=<optimized out>, lenp=<optimized out>, buffer=<optimized out>, write=<optimized out>, table=<optimized out>) at kernel/sysctl.c:964 2 proc_dointvec_minmax (ppos=<optimized out>, lenp=<optimized out>, buffer=<optimized out>, write=<optimized out>, table=<optimized out>) at kernel/sysctl.c:964 3 proc_do_static_key (table=<optimized out>, write=1, buffer=0x0, lenp=0x0, ppos=0x7bf897061f9a0800) at kernel/sysctl.c:1643 4 0xffffffe000206792 in ftrace_make_call (rec=<optimized out>, addr=<optimized out>) at arch/riscv/kernel/ftrace.c:109 5 0xffffffe0002c9c04 in __ftrace_replace_code (rec=0xffffffe01ae40c30, enable=3) at kernel/trace/ftrace.c:2503 6 0xffffffe0002ca0b2 in ftrace_replace_code (mod_flags=<optimized out>) at kernel/trace/ftrace.c:2530 7 0xffffffe0002ca26a in ftrace_modify_all_code (command=5) at kernel/trace/ftrace.c:2677 8 0xffffffe0002ca30e in __ftrace_modify_code (data=<optimized out>) at kernel/trace/ftrace.c:2703 9 0xffffffe0002c13b0 in multi_cpu_stop (data=0x0) at kernel/stop_machine.c:224 10 0xffffffe0002c0fde in cpu_stopper_thread (cpu=<optimized out>) at kernel/stop_machine.c:491 11 0xffffffe0002343de in smpboot_thread_fn (data=0x0) at kernel/smpboot.c:165 12 0xffffffe00022f8b4 in kthread (_create=0xffffffe01af0c040) at kernel/kthread.c:292 13 0xffffffe000201fac in handle_exception () at arch/riscv/kernel/entry.S:236 0xffffffe00020678a <+114>: auipc ra,0xffffe 0xffffffe00020678e <+118>: jalr -118(ra) # 0xffffffe000204714 <patch_text_nosync> 0xffffffe000206792 <+122>: snez a0,a0 (gdb) disassemble patch_text_nosync Dump of assembler code for function patch_text_nosync: 0xffffffe000204714 <+0>: addi sp,sp,-32 0xffffffe000204716 <+2>: sd s0,16(sp) 0xffffffe000204718 <+4>: sd ra,24(sp) 0xffffffe00020471a <+6>: addi s0,sp,32 0xffffffe00020471c <+8>: auipc ra,0x0 0xffffffe000204720 <+12>: jalr -384(ra) # 0xffffffe00020459c <patch_insn_write> 0xffffffe000204724 <+16>: beqz a0,0xffffffe00020472e <patch_text_nosync+26> 0xffffffe000204726 <+18>: ld ra,24(sp) 0xffffffe000204728 <+20>: ld s0,16(sp) 0xffffffe00020472a <+22>: addi sp,sp,32 0xffffffe00020472c <+24>: ret 0xffffffe00020472e <+26>: sd a0,-24(s0) 0xffffffe000204732 <+30>: auipc ra,0x4 0xffffffe000204736 <+34>: jalr -1464(ra) # 0xffffffe00020817a <flush_icache_all> 0xffffffe00020473a <+38>: ld a0,-24(s0) 0xffffffe00020473e <+42>: ld ra,24(sp) 0xffffffe000204740 <+44>: ld s0,16(sp) 0xffffffe000204742 <+46>: addi sp,sp,32 0xffffffe000204744 <+48>: ret (gdb) disassemble flush_icache_all-4 Dump of assembler code for function flush_icache_all: 0xffffffe00020817a <+0>: addi sp,sp,-8 0xffffffe00020817c <+2>: sd ra,0(sp) 0xffffffe00020817e <+4>: auipc ra,0xfffff 0xffffffe000208182 <+8>: jalr -1822(ra) # 0xffffffe000206a60 <ftrace_caller> 0xffffffe000208186 <+12>: ld ra,0(sp) 0xffffffe000208188 <+14>: addi sp,sp,8 0xffffffe00020818a <+0>: addi sp,sp,-16 0xffffffe00020818c <+2>: sd s0,0(sp) 0xffffffe00020818e <+4>: sd ra,8(sp) 0xffffffe000208190 <+6>: addi s0,sp,16 0xffffffe000208192 <+8>: li a0,0 0xffffffe000208194 <+10>: auipc ra,0xfffff 0xffffffe000208198 <+14>: jalr -410(ra) # 0xffffffe000206ffa <sbi_remote_fence_i> 0xffffffe00020819c <+18>: ld s0,0(sp) 0xffffffe00020819e <+20>: ld ra,8(sp) 0xffffffe0002081a0 <+22>: addi sp,sp,16 0xffffffe0002081a2 <+24>: ret (gdb) frame 5 (rec=0xffffffe01ae40c30, enable=3) at kernel/trace/ftrace.c:2503 2503 return ftrace_make_call(rec, ftrace_addr); (gdb) p /x rec->ip $2 = 0xffffffe00020817a -> flush_icache_all ! When we modified flush_icache_all's patchable-entry with ftrace_caller: - Insert ftrace_caller at flush_icache_all prologue. - Call flush_icache_all to sync I/Dcache, but flush_icache_all is just we modified by half. Link: https://lore.kernel.org/linux-riscv/CAJF2gTT=oDWesWe0JVWvTpGi60-gpbNhYLdFWN_5EbyeqoEDdw@mail.gmail.com/T/#tSigned-off-by:
Atish Patra <atish.patra@wdc.com> Signed-off-by:
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Guo Ren authored
We must use $(CC_FLAGS_FTRACE) instead of directly using -pg. It will cause -fpatchable-function-entry error. Signed-off-by:
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Guo Ren authored
Unfortunately, the current code couldn't be compiled: CC arch/riscv/kernel/patch.o In file included from ./include/linux/kernel.h:11, from ./include/linux/list.h:9, from ./include/linux/preempt.h:11, from ./include/linux/spinlock.h:51, from arch/riscv/kernel/patch.c:6: In function ‘fix_to_virt’, inlined from ‘patch_map’ at arch/riscv/kernel/patch.c:37:17: ./include/linux/compiler.h:392:38: error: call to ‘__compiletime_assert_205’ declared with attribute error: BUILD_BUG_ON failed: idx >= __end_of_fixed_addresses _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ ./include/linux/compiler.h:373:4: note: in definition of macro ‘__compiletime_assert’ prefix ## suffix(); \ ^~~~~~ ./include/linux/compiler.h:392:2: note: in expansion of macro ‘_compiletime_assert’ _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’ #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:50:2: note: in expansion of macro ‘BUILD_BUG_ON_MSG’ BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ ./include/asm-generic/fixmap.h:32:2: note: in expansion of macro ‘BUILD_BUG_ON’ BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ^~~~~~~~~~~~ Because fix_to_virt(, idx) needs a const value, not a dynamic variable of reg-a0 or BUILD_BUG_ON failed with "idx >= __end_of_fixed_addresses". Signed-off-by: -
Patrick Stählin authored
Needed for kprobes support. Copied and adapted from arm64 code. Guo Ren fixup pt_regs type for linux-5.8-rc1. Signed-off-by:
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Kefeng Wang authored
Add the machine name to kernel boot-up log, and install the machine name to stack dump for DT boot mode. Signed-off-by:
Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by:
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Atish Patra authored
Use the generic numa implementation to add NUMA support for RISC-V. This is based on Greentime's patch[1] but modified to use generic NUMA implementation and few more fixes. [1] https://lkml.org/lkml/2020/1/10/233Co-developed-by:
Greentime Hu <greentime.hu@sifive.com> Signed-off-by:
Anup Patel <anup@brainfault.org> Reviewed-by:
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Greentime Hu authored
These two functions are used to distinguish between PROT_NONENUMA protections and hinting fault protections. Signed-off-by:
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Atish Patra authored
Currently, we perform some memory init functions in paging init. But, that will be an issue for NUMA support where DT needs to be flattened before numa initialization and memblock_present can only be called after numa initialization. Move memory initialization related functions to a separate function. Signed-off-by:
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Atish Patra authored
ARM64 numa implementation is generic enough that RISC-V can reuse that implementation with very minor cosmetic changes. This will help both ARM64 and RISC-V in terms of maintanace and feature improvement Move the numa implementation code to common directory so that both ISAs can reuse this. This doesn't introduce any function changes for ARM64. Signed-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com> Tested-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
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Atish Patra authored
This is a preparatory patch for unifying numa implementation between ARM64 & RISC-V. As the numa implementation will be moved to generic code, rename the arm64 related functions to a generic one. Signed-off-by:
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Damien Le Moal authored
Add a reset controller driver for the Canaan Kendryte K210 SoC. This driver relies on its syscon compatible parent node (sysctl) for its register mapping. Default this driver compilation to y when the SOC_CANAAN option is selected. The MAINTAINERS file is updated, adding the entry "CANAAN/KENDRYTE K210 SOC RESET CONTROLLER DRIVER" with myself listed as maintainer for this driver. Signed-off-by:
Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by:
Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by:
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Damien Le Moal authored
Document the device tree bindings for the Canaan Kendryte K210 SoC Fully Programmable IO Array (FPIOA) pinctrl driver in Documentation/devicetree/bindings/pinctrl/canaan,k210-fpioa.yaml. The new header file include/dt-bindings/pinctrl/k210-fpioa.h is added to define all 256 possible pin functions of the SoC IO pins, as well as macros simplifying the definition of pin functions in a device tree. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Damien Le Moal authored
Document the device tree bindings for the Canaan Kendryte K210 SoC reset controller driver in Documentation/devicetree/bindings/reset/canaan,k210-rst.yaml. The header file include/dt-bindings/reset/k210-rst.h is added to define all possible reset lines of the SoC. Signed-off-by:
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Damien Le Moal authored
Document the device tree bindings of the Canaan Kendryte K210 SoC system controller driver in Documentation/devicetree/bindings/mfd/canaan,k210-sysctl.yaml. Signed-off-by:
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Damien Le Moal authored
Introduce the header file include/soc/canaan/k210-sysctl.h to have a common definition of the Canaan Kendryte K210 SoC system controller registers. Simplify the k210 system controller driver code by removing unused register bits definition. The MAINTAINERS file is updated, adding the entry "CANAAN/KENDRYTE K210 SOC SYSTEM CONTROLLER DRIVER" with myself listed as maintainer for this driver. This is a preparatory patch for introducing the K210 clock driver. No functional changes are introduced. Signed-off-by:
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Damien Le Moal authored
Remove the clocks property from the cpu and clint nodes as these are ignored. Also remove the clock-frequency property from the cpu nodes as riscv relies on the timebase-frequency property. Signed-off-by:
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Damien Le Moal authored
Rename configuration options and directories related to the Kendryte K210 SoC to use the SoC vendor name (canaan) instead of the "kendryte" branding name. Signed-off-by:
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- 08 Jan, 2021 12 commits
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Damien Le Moal authored
All SiPeed K210 MAIX boards have the exact same vendor, arch and implementation IDs, preventing differentiation to select the correct device tree to use through the SOC_BUILTIN_DTB_DECLARE() macro. This result in this macro to be useless and mandates changing the code of the sysctl driver to change the builtin device tree suitable for the target board. Fix this problem by removing the SOC_BUILTIN_DTB_DECLARE() macro since it is used only for the K210 support. The code searching the builtin DTBs using the vendor, arch an implementation IDs is also removed. Support for builtin DTB falls back to the simpler and more traditional handling of builtin DTB using the CONFIG_BUILTIN_DTB option, similarly to other architectures. Signed-off-by:
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Yash Shah authored
Add initial board data for the SiFive HiFive Unmatched A00. This patch is dependent on Zong's Patchset[0]. [0]: https://lore.kernel.org/linux-riscv/20201130082330.77268-4-zong.li@sifive.com/T/#uSigned-off-by:
Yash Shah <yash.shah@sifive.com> Signed-off-by:
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Yash Shah authored
Add new compatible strings to the YAML DT binding document to support SiFive's HiFive Unmatched board Signed-off-by:
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Yash Shah authored
Add initial support for the SiFive FU540-C000 SoC. FU740-C000 is built around the SiFIve U7 Core Complex and a TileLink interconnect. This file is expected to grow as more device drivers are added to the kernel. Signed-off-by:
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Yash Shah authored
Add new compatible strings to the DT binding documents to support SiFive FU740-C000. Signed-off-by:
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Yash Shah authored
Add new compatible strings to the DT binding documents to support SiFive FU740-C000. Signed-off-by:
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Yash Shah authored
Add new compatible strings in cpus.yaml to support the E71 and U74 CPU cores ("harts") that are present on FU740-C000 SoC. Signed-off-by: -
Yash Shah authored
SiFive FU740 has 4 ECC interrupt sources as compared to 3 in FU540. Update the L2 cache controller driver to support this additional interrupt in case of FU740-C000 chip. Signed-off-by:
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Yash Shah authored
The L2 cache controller in SiFive FU740 has 4 ECC interrupt sources as compared to 3 in FU540. Update the DT documentation accordingly with "compatible" and "interrupt" property changes. Signed-off-by:
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Eric Lin authored
We found this issue in an legacy out-of-tree kernel module which didn't properly access user space pointer by get/put_user(). Such an illegal access loops in the page fault handler. To resolve this, let it die here. Signed-off-by:
Eric Lin <tesheng@andestech.com> Reviewed-by:
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Eric Lin authored
Like arm64, this patch adds a die_kernel_fault() helper to ensure the same semantics for the different kernel faults. Signed-off-by:
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Kefeng Wang authored
Fix sbi_init() function declaration mismatch between RISCV_SBI enable and disable, as it always returned 0, make it void function. Drop some stubs which won't be used if RISCV_SBI disabled. Signed-off-by:
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- 03 Jan, 2021 1 commit
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Linus Torvalds authored
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- 02 Jan, 2021 3 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds authored
Pull s390 cleanups from Vasily Gorbik: "Update defconfigs and sort config select list" * tag 's390-5.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/Kconfig: sort config S390 select list once again s390: update defconfigs
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull power management fixes from Rafael Wysocki: "These fix a crash in intel_pstate during resume from suspend-to-RAM that may occur after recent changes and two resource leaks in error paths in the operating performance points (OPP) framework, add a new C-states table to intel_idle and update the cpuidle MAINTAINERS entry to cover the governors too. Specifics: - Fix recently introduced crash in the intel_pstate driver that occurs if scale-invariance is disabled during resume from suspend-to-RAM due to inconsistent changes of APERF or MPERF MSR values made by the platform firmware (Rafael Wysocki). - Fix a memory leak and add a missing clk_put() in error paths in the OPP framework (Quanyang Wang, Viresh Kumar). - Add new C-states table for SnowRidge processors to the intel_idle driver (Artem Bityutskiy). - Update the MAINTAINERS entry for cpuidle to make it clear that the governors are covered by it too (Lukas Bulwahn)" * tag 'pm-5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: intel_idle: add SnowRidge C-state table cpufreq: intel_pstate: Fix fast-switch fallback path opp: Call the missing clk_put() on error opp: fix memory leak in _allocate_opp_table MAINTAINERS: include governors into CPU IDLE TIME MANAGEMENT FRAMEWORK -
Rafael J. Wysocki authored
* pm-cpufreq: cpufreq: intel_pstate: Fix fast-switch fallback path * pm-cpuidle: intel_idle: add SnowRidge C-state table MAINTAINERS: include governors into CPU IDLE TIME MANAGEMENT FRAMEWORK
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- 01 Jan, 2021 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "This is a load of driver fixes (12 ufs, 1 mpt3sas, 1 cxgbi). The big core two fixes are for power management ("block: Do not accept any requests while suspended" and "block: Fix a race in the runtime power management code") which finally sorts out the resume problems we've occasionally been having. To make the resume fix, there are seven necessary precursors which effectively renames REQ_PREEMPT to REQ_PM, so every "special" request in block is automatically a power management exempt one. All of the non-PM preempt cases are removed except for the one in the SCSI Parallel Interface (spi) domain validation which is a genuine case where we have to run requests at high priority to validate the bus so this becomes an autopm get/put protected request" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (22 commits) scsi: cxgb4i: Fix TLS dependency scsi: ufs: Un-inline ufshcd_vops_device_reset function scsi: ufs: Re-enable WriteBooster after device reset scsi: ufs-mediatek: Use correct path to fix compile error scsi: mpt3sas: Signedness bug in _base_get_diag_triggers() scsi: block: Do not accept any requests while suspended scsi: block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT scsi: core: Only process PM requests if rpm_status != RPM_ACTIVE scsi: scsi_transport_spi: Set RQF_PM for domain validation commands scsi: ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT scsi: ide: Do not set the RQF_PREEMPT flag for sense requests scsi: block: Introduce BLK_MQ_REQ_PM scsi: block: Fix a race in the runtime power management code scsi: ufs-pci: Enable UFSHCD_CAP_RPM_AUTOSUSPEND for Intel controllers scsi: ufs-pci: Fix recovery from hibernate exit errors for Intel controllers scsi: ufs-pci: Ensure UFS device is in PowerDown mode for suspend-to-disk ->poweroff() scsi: ufs-pci: Fix restore from S4 for Intel controllers scsi: ufs-mediatek: Keep VCC always-on for specific devices scsi: ufs: Allow regulators being always-on scsi: ufs: Clear UAC for RPMB after ufshcd resets ...
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