[RFC PR] RISC-V changes for 4.17
Palmer Dabbelt
palmer at sifive.com
Tue Apr 3 11:34:04 PDT 2018
I'd just go with riscv-all: it contains all the patches here as wall as the
extra drivers. It's automatically generated from the other trees, so it should
be pretty straight-forward to check and see that everything in here is in
there. This will, of course, all be fixed when we actually manage to get
enough drivers to boot upstream :).
On Tue, 03 Apr 2018 00:22:13 PDT (-0700), Atish.Patra at wdc.com wrote:
> Hi Palmer,
> A bit off-topic question:
> What is the best way to boot/test riscv-linux tree with freedom-u-sdk setup ?
> The tag riscv-for-linus-4.17-mw0 in riscv-linux repo doesn't boot with qemu in freedom-u-sdk setup.
> I verified that riscv-all from github boots fine. So I tried cherry-picking the missing changes from riscv-linux to riscv-all branch. It still failed to boot.
>
> It might be a my work space specific issue but couldn't identify what's causing it hang.
>
> kernel hangs during the boot after:
> [ 0.000000] usbcore: registered new interface driver usb-storage
> [ 0.000000] usbcore: registered new interface driver usbhid
> [ 0.000000] usbhid: USB HID core driver
> [ 0.000000] NET: Registered protocol family 17
> [ 0.000000] Freeing unused kernel memory: 7976K
> [ 0.000000] This architecture does not have kernel memory protection.
>
> Regards,
> Atish
>
>
>> On Apr 2, 2018, at 8:58 PM, Palmer Dabbelt <palmer at sifive.com> wrote:
>>
>> Here's the PR I'm planning on submitting to Linus for the first half of the
>> 4.17 merge window. Unless anyone knows of any problems I'll submit the PR on
>> Wednesday morning. I haven't given this a much testing as I probably should
>> have, so please go give things a shot!
>>
>> I don't want to take any new code for Wednesday, but I'm planning on taking the
>> perf stuff for next week if some small issues iron themselves out.
>>
>> Thanks to everyone for all the help!
>>
>> The following changes since commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda:
>>
>> Linux 4.16 (2018-04-01 14:20:27 -0700)
>>
>> are available in the Git repository at:
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux.git tags/riscv-for-linus-4.17-mw0
>>
>> for you to fetch changes up to 7a8e7da42250138adf202ba2596ef7f68651060a:
>>
>> RISC-V: Fixes to module loading (2018-04-02 20:43:14 -0700)
>>
>> ----------------------------------------------------------------
>> RISC-V changes for 4.17
>>
>> This tag contains the new features we'd like to incorporate into the
>> RISC-V port for 4.17. We might have a bit more stuff land later in the
>> merge window, but I wanted to get this out earlier just so everyone can
>> see where we currently stand.
>>
>> A short summary of the changes is:
>>
>> * We've added support for dynamic ftrace on RISC-V targets.
>> * There have been a handful of cleanups to our atomic and locking
>> routines. They now more closely match the released RISC-V memory
>> model draft.
>> * Our module loading support has been cleaned up and is now enabled by
>> default, despite some limitations still existing.
>>
>> There's more information in the merge commits for each patch set.
>>
>> ----------------------------------------------------------------
>> Alan Kao (6):
>> riscv/ftrace: Add RECORD_MCOUNT support
>> riscv/ftrace: Add dynamic function tracer support
>> riscv/ftrace: Add dynamic function graph tracer support
>> riscv/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support
>> riscv/ftrace: Add DYNAMIC_FTRACE_WITH_REGS support
>> riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support
>>
>> Andrea Parri (3):
>> riscv/barrier: Define __smp_{store_release,load_acquire}
>> riscv/spinlock: Strengthen implementations with fences
>> riscv/atomic: Strengthen implementations with fences
>>
>> Palmer Dabbelt (3):
>> RISC-V: Add dynamic ftrace support for RISC-V platforms
>> RISC-V: Assorted memory model fixes
>> RISC-V: Fixes to module loading
>>
>> Zong Li (11):
>> RISC-V: Add sections of PLT and GOT for kernel module
>> RISC-V: Add section of GOT.PLT for kernel module
>> RISC-V: Support GOT_HI20/CALL_PLT relocation type in kernel module
>> RISC-V: Support CALL relocation type in kernel module
>> RISC-V: Support HI20/LO12_I/LO12_S relocation type in kernel module
>> RISC-V: Support RVC_BRANCH/JUMP relocation type in kernel modulewq
>> RISC-V: Support ALIGN relocation type in kernel module
>> RISC-V: Support ADD32 relocation type in kernel module
>> RISC-V: Support SUB32 relocation type in kernel module
>> RISC-V: Enable module support in defconfig
>> RISC-V: Add definition of relocation types
>>
>> arch/riscv/Kconfig | 8 +
>> arch/riscv/Makefile | 8 +
>> arch/riscv/configs/defconfig | 2 +
>> arch/riscv/include/asm/atomic.h | 417 +++++++++++++++++++++++-------------
>> arch/riscv/include/asm/barrier.h | 15 ++
>> arch/riscv/include/asm/cmpxchg.h | 391 +++++++++++++++++++++++++++------
>> arch/riscv/include/asm/fence.h | 12 ++
>> arch/riscv/include/asm/ftrace.h | 56 +++++
>> arch/riscv/include/asm/module.h | 113 ++++++++++
>> arch/riscv/include/asm/spinlock.h | 29 +--
>> arch/riscv/include/uapi/asm/elf.h | 7 +
>> arch/riscv/kernel/Makefile | 6 +-
>> arch/riscv/kernel/ftrace.c | 175 ++++++++++++++-
>> arch/riscv/kernel/mcount-dyn.S | 239 +++++++++++++++++++++
>> arch/riscv/kernel/mcount.S | 22 +-
>> arch/riscv/kernel/module-sections.c | 156 ++++++++++++++
>> arch/riscv/kernel/module.c | 179 +++++++++++++++-
>> arch/riscv/kernel/module.lds | 8 +
>> arch/riscv/kernel/stacktrace.c | 6 +
>> scripts/recordmcount.pl | 5 +
>> 20 files changed, 1601 insertions(+), 253 deletions(-)
>> create mode 100644 arch/riscv/include/asm/fence.h
>> create mode 100644 arch/riscv/include/asm/module.h
>> create mode 100644 arch/riscv/kernel/mcount-dyn.S
>> create mode 100644 arch/riscv/kernel/module-sections.c
>> create mode 100644 arch/riscv/kernel/module.lds
>>
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