opensbi.git/platform/generic/platform.c, branch v1.4

lib: sbi: Allow ecall handlers to directly update register state

2023-12-19T10:26:37Z

Some of the upcoming SBI extensions (such as SSE) will directly update register state so improve the prototype of ecall handler to accommodate this. Further, this flexibility allows us to push the trap redirection from sbi_ecall_handler() to the sbi_ecall_legacy_handler(). Signed-off-by: Anup Patel

platform: generic: Fine tune fw_platform_calculate_heap_size()

2023-12-19T10:26:37Z

Let's use SBI_TLB_INFO_SIZE instead of hard-coded 0x40 in fw_platform_calculate_heap_size() to fine tune the heap size required for per-hart TLB fifos. Signed-off-by: Anup Patel

platform: recalculate heap size to support new tlb entry number

2023-12-11T03:53:24Z

Previous patch introduced a change that using hart count as the default number of tlb entries in the fifo. This makes the default tlb fifo size grow in square with the number of harts. So the default heap size is not enough to allocate tlb fifo when the hart count is big. Fixes: 52fd64b ("platform: Uses hart count as the default size of tlb info") Signed-off-by: Inochi Amaoto Reviewed-by: Anup Patel

platform: generic: Introduce pmu_init() platform override

2023-12-06T12:19:59Z

Add pmu_init() platform override, which will be used to register PMU device and populate event mappings. Signed-off-by: Yu Chien Peter Lin Reviewed-by: Atish Patra Reviewed-by: Lad Prabhakar Reviewed-by: Anup Patel

sbi: sbi_pmu: Improve sbi_pmu_init() error handling

2023-12-06T11:54:38Z

This patch makes the following changes: - As sbi_platform_pmu_init() returns a negative error code on failure, let sbi_pmu_init() print out the error code with sbi_dprintf(). - In order to distinguish the SBI_EFAIL error returned by sbi_pmu_add_*_counter_map(), return SBI_ENOENT to indicate that fdt_pmu_setup() failed to locate "riscv,pmu" node, and generic_pmu_init() ignores such case. Signed-off-by: Yu Chien Peter Lin Reviewed-by: Anup Patel Reviewed-by: Lad Prabhakar Reviewed-by: Atish Patra

lib: sbi: change sbi_hart_features.extensions as an array

2023-11-17T07:53:49Z

In the future there may be a lot of ISA extensions, a 'long' may not be able to accommodate, changed to an array for the future. Addresses-Coverity-ID: 1568357 Out-of-bounds access Fixes: 6259b2ec2d09 ("lib: utils/fdt: Fix fdt_parse_isa_extensions() implementation") Signed-off-by: Xiang W Reviewed-by: Heinrich Schuchardt Reviewed-by: Anup Patel

platform: Uses hart count as the default size of tlb info

2023-11-16T04:23:45Z

For platform with high number of harts, it is better to auto detect a suitable number of entries in tlb fifo. Since allocating tlb entry for all online harts can reduce the wait time significantly, using the number of the online harts can make most platforms happy. This auto detection can avoid most duplicate code for setting tlb fifo size. Signed-off-by: Inochi Amaoto Acked-by: Guo Ren Reviewed-by: Xiang W Reviewed-by: Anup Patel

platform: Allow platforms to specify the size of tlb fifo

2023-09-10T05:51:05Z

For some platforms with a particularly high number of harts, if the tlb fifo is too small, it case harts to wait. Platforms should be allowed to specify the size of the tlb fifo. Signed-off-by: Xiang W Signed-off-by: Xing Xiaoguang Reviewed-by: Anup Patel

lib: utils: Add detection of Smepmp from ISA string in FDT

2023-07-13T06:42:58Z

- Add function to parse ISA string in FDT. - Set Smepmp feature bit in extensions if "smepmp" string is found in ISA string. Signed-off-by: Himanshu Chauhan Reviewed-by: Anup Patel

lib: reset: Move fdt_reset_init into generic_early_init

2023-06-21T05:42:42Z

The fdt_reset_thead driver needs to modify the __reset_thead_csr_stub text region for the secondary harts booting. After that, the sbi_hart_pmp_configure may lock down the text region with M_READABLE & M_EXECUTABLE attributes in the future. Currently, the M_READABLE & M_EXECUtABLE have no effect on m-mode, the L-bit in pmpcfg csr is useless for the current opensbi scenario. See: Priv-isa-spec 3.7.1.2. Locking and Privilege Mode When the L bit is clear, any M-mode access matching the PMP entry will succeed; the R/W/X permissions apply only to S and U modes. That's why current fdt_reset_thead could still work well after commit: 230278dcf127 ("lib: sbi: Add separate entries for firmware RX and RW regions"). So this patch fixes up a fake bug for the M-mode permission setting of the future. Fixes: 230278dcf127 ("lib: sbi: Add separate entries for firmware RX and RW regions") Link: http://lists.infradead.org/pipermail/opensbi/2023-June/005176.html Reported-by: Jessica Clarke Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Anup Patel