software/src/opensbi.git/docs, branch master

lib: utils: fdt_domain: add root-regions-inheritance policy

2026-05-18T12:50:50+00:00

Introduce root-regions-inheritance DT property to control copying of root domain memregions. Support 'all' and 'm-only' modes, always inheriting firmware and M-only regions; behavior matches m-only policy when property is absent. Signed-off-by: Yu-Chien Peter Lin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260516072906.1427203-1-peter.lin@sifive.com Signed-off-by: Anup Patel

docs: platform: update qemu_virt.md

2026-05-11T04:56:36+00:00

When using GDB for debugging, if FW_TEXT_START is not set to 0x80000000 during compilation, the following error occurs: Reading symbols from build/platform/generic/firmware/fw_payload.elf... Remote debugging using localhost:1234 mips_warm_boot () at /home/zrmin/opensbi/platform/generic/mips/mips_warm_boot.S:11 11 j _start_warm (gdb) b _start Breakpoint 1 at 0x0: file /home/zrmin/opensbi/firmware/fw_base.S, line 50. (gdb) c Continuing. Remote connection closed (gdb) With FW_TEXT_START=0x80000000, debugging works correctly: Reading symbols from build/platform/generic/firmware/fw_payload.elf... Remote debugging using localhost:1234 0x0000000000001000 in ?? () (gdb) b _start Breakpoint 1 at 0x80000000: file /home/zrmin/opensbi/firmware/fw_base.S, line 50. (gdb) c Continuing. Breakpoint 1, _start () at /home/zrmin/opensbi/firmware/fw_base.S:50 50 MOV_3R s0, a0, s1, a1, s2, a2 (gdb) This is because QEMU loads OpenSBI at address 0x80000000. When FW_TEXT_START does not match this address, the debug symbols are incorrectly offset, causing GDB to fail to set breakpoints properly. Signed-off-by: Zhang RunMin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260319125641.480161-1-runmin.zhang@ingenic.com Signed-off-by: Anup Patel

lib: fdt_domain: Default boot-hart to coldboot HART for multi-domain boot

2026-05-11T04:41:06+00:00

When "boot-hart" is not specified, dom->boot_hartid was left as -1U, causing domain context switching to fail. Default it to the coldboot HART to enable SMP boot in multi-domain setups, consistent with how next-arg1 is handled. Also update its description in domain_support.md. Signed-off-by: Yu-Chien Peter Lin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260327054936.3462935-1-peter.lin@sifive.com Signed-off-by: Anup Patel

platform: generic: Tenstorrent Atlantis support

2026-05-09T15:27:50+00:00

Add the Tenstorrent Atlantis as a generic-platform. This initial support enables the single_fw_region option, and verifies and prints HART PMA CSR configuration. Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260424062520.238403-1-npiggin@gmail.com Signed-off-by: Anup Patel

platform: Remove kendryte/k210 platform

2026-05-09T07:35:51+00:00

The kendryte/k210 platform does not have MMU support in S-mode hence only NOMMU kernel which runs in M-mode can be used on this platform. As of now, there is no clear use-case of supporting OpenSBI for kendryte/k210 platform. Signed-off-by: Anup Patel Link: https://lore.kernel.org/r/20260409045310.2045739-1-anup.patel@oss.qualcomm.com Signed-off-by: Anup Patel

platform: ariane: Move ariane platform from fpga to generic

2025-11-05T15:52:41+00:00

The Ariane framework has a generic PMU that is not used by OpenSBI. Due to OpenSBI’s build system we cannot directly reuse the generic platform functions, so move the Ariane platform to generic. Also due to the generic platform is where new features are added. Signed-off-by: Manuel Hernández Méndez Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20251023090347.30746-1-maherme.dev@gmail.com Signed-off-by: Anup Patel

platform: openpiton: Move openpiton platform from fpga to generic

2025-08-26T11:38:00+00:00

The OpenPiton framework has a generic PMU that is not used by OpenSBI. Due to OpenSBI’s build system we cannot directly reuse the generic platform functions, so move the OpenPiton platform to generic. Also due to the generic platform is where new features are added. Signed-off-by: Manuel Hernández Méndez Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20250813104759.33276-1-maherme.dev@gmail.com Signed-off-by: Anup Patel

docs: pmu_support: fix example typos

2025-04-14T11:55:54+00:00

The (event ID & "second column mask") should equal the "first column match value". Modify the example to fit the description. Signed-off-by: Leo Yu-Chi Liang Reviewed-by: Samuel Holland Link: https://lore.kernel.org/r/20250324043943.2513070-1-ycliang@andestech.com Signed-off-by: Anup Patel

lib: Emit lr and sc instructions based on -march flags

2025-03-28T13:22:05+00:00

When -march=rv64im_zalrsc_zicsr is used, provide atomic operations and locks using lr and sc instructions only. Signed-off-by: Chao-ying Fu Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20250226014727.19710-1-cfu@mips.com Signed-off-by: Anup Patel

platform: introduce DT-based configurable heap size

2024-11-11T12:18:45+00:00

The default heap size will work for most platforms, but for some special platforms, the heap is too small to hold all the information or is too big so that it take too much ram. Introduce configurable heap should solve this problem and make all generic platforms happy. Add DT-based heap-size for the generic platform. Signed-off-by: Inochi Amaoto Reviewed-by: Xiang W Reviewed-by: Anup Patel