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ARC: Proper kernel mapping

1

Use proper page flags for different memory sections, for example X is used only for text section. Previously we mapped kernel as an one big chunk. Now kernel mapping is...

VVIsaev

Hi Could you help me enable BPF support on Arc Linux on HS36 dual-core SMP. Thanks

jack-chen1688

Kernel build fails when CONFIG_DEBUG_INFO_BTF configuration option is enabled: ``` $ ARCH=arc CROSS_COMPILE=arc32-linux- make loader ... AR init/built-in.a LD vmlinux.o MODPOST vmlinux.symvers MODINFO modules.builtin.modinfo GEN modules.builtin LD .tmp_vmlinux.btf BTF .btf.vmlinux.bin.o...

geomatsi

Kernel build fails for HS6x (ARCv3 64-bit) configuration with enabled CONFIG_DEBUG_INFO_BTF even if workaround from https://github.com/foss-for-synopsys-dwc-arc-processors/linux/issues/87 is applied: ``` $ ARCH=arc CROSS_COMPILE=arc64-buildroot-linux-gnu- make ... CC init/version.o AR init/built-in.a LD vmlinux.o...

geomatsi

arc_pmu_device_probe: BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1

4

With enabled `CONFIG_DEBUG_PREEMPT` the following stack-trace gets printed on SMP ARC platforms with performance counters interrupts: ``` ARC perf : 8 counters (48 bits), 128 conditions, [overflow IRQ support] BUG:...

abrodkin

With current implementation of eBPF for ARCv2 processors on execution of some tests the following message appears: ```shell # ./execsnoop libbpf: BTF loading error: -22 libbpf: -- BEGIN BTF LOAD...

abrodkin

This PR enables a couple of features required for better BPF support on ARCompact/ARCv2/ARCv3 architectures: * HAVE_REGS_AND_STACK_ACCESS_API * HAVE_SYSCALL_TRACEPOINTS Known issues with BTF generation: * https://github.com/foss-for-synopsys-dwc-arc-processors/linux/issues/87 * https://github.com/foss-for-synopsys-dwc-arc-processors/linux/issues/88 With quick...

geomatsi

Possible race condition in the Linux kernel

2

After the commit [Fixed issue related to Zephyr](https://github.com/foss-for-synopsys-dwc-arc-processors/qemu/commit/2625a6fb) in QEMU, I've noticed my linux image is behaving weirdly. At random points in time, usually within the first minute, it starts...

shahab-vahedi

Hi, We need to use openamp on HS CPU base on linux to communicate with others CPU. Now we can run the linux. How can I import the openamp and...

joshualin-petaio

Earlycon fails to initialize on arcv2 properly if uncached region is below default 0xc0000000

4

Hi, I've got a complaint about missing boot output (at least with 5.10.80 version). System has UART mapped **0xac002000**, and "earlycon=uart8250,mmio32,**0xac002000**,115200n" boot args don't help. default perip_base is set to...

iguryanov