opensbi.git/lib, branch v1.4

lib: sbi: Detect Zicntr extension only based on traps

2023-12-27T06:55:09Z

OpenSBI uses time CSR if Zicntr extension present which causes it to crash on an older QEMU because QEMU generates Zicntr in the ISA string for unleashed machine which only has CYCLE and INSTRET counters. Fixes: 776770d2adbf ("lib: sbi: Using one array to define the name of extensions") Signed-off-by: Anup Patel Signed-off-by: Anup Patel

lib: utils/timer: mtimer: only use regname for aclint

2023-12-27T06:27:33Z

The parser will fail if the timer is clint timer and has regname property. As the regname is only meaningful for aclint, it is more robust to only check regname for aclint timer. Fixes: 6112d58 ("lib: utils/fdt: Allow to use reg-names when parsing ACLINT") Signed-off-by: Inochi Amaoto Reviewed-by: Anup Patel

lib: sbi: Fix shift bug in sbi_system_reset

2023-12-26T15:58:34Z

There is a problem with judging whether the current hart belongs to hmask. If cur_hartid minus hbase is greater than BITS_PER_LONG, the previous hmask will also have a bit cleared incorrectly, which will cause some harts to lose ipi. Signed-off-by: Xiang W Reviewed-by: Anup Patel

lib: sbi: Do not enter OpenSBI with mseccfg.MML == 1

2023-12-19T10:26:37Z

On platforms with Smepmp, the previous booting stage must enter OpenSBI with mseccfg.MML == 0. This allows OpenSBI to configure it's own M-mode only regions without depending on the previous booting stage. Signed-off-by: Anup Patel

lib: sbi: Remove the SBI_ETRAP error code

2023-12-19T10:26:37Z

The SBI_ETRAP error code was introduced only for doing trap redirection in generic sbi_ecall_handler(). Now the trap redirection is moved into sbi_ecall_legacy.c and SBI_ETRAP error code is only used in this source file so let us remove it. Signed-off-by: Anup Patel

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

lib: utils/irqchip: Add shared MMIO region for PLIC in root domain

2023-12-19T10:26:37Z

On platforms with Smepmp, the MMIO regions accessed by M-mode need to be explicitly marked with M-mode only read/write or shared (both (M-mode and S-mode) read/write permission. If the above is not done then runtime PLIC access from M-mode on platforms with Smepmp will result in access fault when further results in CPU hotplug not working. Signed-off-by: Anup Patel

lib: sbi_tlb: Reduce size of struct sbi_tlb_info

2023-12-19T10:26:37Z

Let us reduce the size of struct sbi_tlb_info by doing the following: 1) Change the data type of asid and vmid fields to uint16_t 2) Replace local_fn() function pointer with an enum Based on the above, the size of struct sbi_tlb_info is reduced by 16 bytes on RV64 and 4 bytes on RV32. Signed-off-by: Anup Patel

lib: sbi: Detect extensions from the ISA string in DT

2023-12-19T10:09:17Z

Enable access to some extensions through menvcfg and show them in "Boot HART ISA Extensions" if they are present in the device tree. Signed-off-by: Yong-Xuan Wang Reviewed-by: Anup Patel

lib: sbi: Using one array to define the name of extensions

2023-12-19T08:44:22Z

Define an array sbi_hart_ext to map extension ID and name , and use it for ISA parsing and printing out the supported extensions. Signed-off-by: Yong-Xuan Wang Reviewed-by: Anup Patel