opensbi.git/lib/utils/irqchip, branch v1.4

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: Allow relaxed MMIO writes in device ipi_send() callback

2023-11-26T13:15:06Z

Currently, we have a smp_wmb() between atomic_raw_set_bit() and ipi_send() device callback whereas the MMIO writes done by the device ipi_send() callback will also include a barrier. We can avoid unnecessary/redundant barriers described above by allowing relaxed MMIO writes in device ipi_send() callback. To achieve this, we simply use wmb() instead of smp_wmb() before calling device ipi_send(). Signed-off-by: Anup Patel Reported-by: Bo Gan

lib: utils/irqchip: Avoid redundant writes to APLIC CLRIE register

2023-11-24T07:18:41Z

Each APLIC CLRIE register allows disabling 32 interrupt sources at a time by writing -1 so no need to write CLRIE register separately for each interrupt source. Fixes: 99792653de29 ("lib: utils/irqchip: Add APLIC initialization library") Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Prefer hartindex over hartid in IPI framework

2023-09-24T06:09:38Z

Let us prefer hartindex over hartid in IPI framework which in-turn forces IPI users to also prefer hartindex. Signed-off-by: Anup Patel

lib: utils/irqchip: Use scratch space to save per-HART IMSIC pointer

2023-06-06T10:31:14Z

Instead of using a global array indexed by hartid, we should use scratch space to save per-HART IMSIC pointer and IMSIC file number. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: utils/irqchip: Don't check hartid in imsic_update_hartid_table()

2023-06-05T11:21:07Z

The imsic_map_hartid_to_data() already checks hartid before using so we don't need to check in imsic_update_hartid_table(). Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: utils/irqchip: Use scratch space to save per-HART PLIC pointer

2023-06-05T11:20:56Z

Instead of using a global array indexed by hartid, we should use scratch space to save per-HART PLIC pointer and PLIC context numbers. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: utils/irqchip: Use heap in PLIC, APLIC and IMSIC drivers

2023-06-05T10:27:58Z

Let's use heap allocation in PLIC, APLIC, and IMSIC irqchip drivers instead of using a fixed size global array. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: utils: Add M-mode {R/W} flags to the MMIO regions

2023-01-09T12:34:28Z

Add the M-mode readable/writable flags to mmio regions of various drivers. Signed-off-by: Himanshu Chauhan Reviewed-by: Anup Patel Tested-by: Anup Patel

lib: utils/irqchip: plic: Ensure no out-of-bound access in context save/restore helpers

2022-12-17T03:33:30Z

Currently the context save/restore helpers writes/reads the provided array using an index whose maximum value is determined by PLIC, which potentially may disagree with the caller to these helpers. Add a parameter to ask the caller to provide the size limit of the array to ensure no out-of-bound access happens. Signed-off-by: Bin Meng Reviewed-by: Anup Patel