opensbi.git/lib/sbi/sbi_ecall_replace.c, branch master

lib: sbi_ecall: Split up sbi_ecall_replace

2022-11-15T11:14:03Z

Split up sbi_ecall_replace so that each extension is in its individual file. Also reorganize the corresponding section in lib/sbi/objects.mk so that it is grouped by extension, now that the object file targets are split up. Signed-off-by: Vivian Wang Reviewed-by: Anup Patel

lib: sbi_ecall: Add Kconfig option for each extension

2022-10-23T05:31:33Z

For each SBI extension, we: - Add a Kconfig option for it - Add the extension to sbi_ecall_exts only if the extension is enabled - Add the corresponding sbi_ecall_* object file only if the extension is enabled Special cases are as follows: - The legacy extensions are lumped together as one 'big' extension, as has always been the case in OpenSBI code. - The platform-defined vendor extensions are regarded as one extension. - The Base extension cannot be disabled. - sbi_ecall_replace implements multiple extensions, so it's not easy to avoid linking it in. Enable it always, and use #ifdef to disable/enable individual extensions. Signed-off-by: Vivian Wang Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi: system reset with invalid parameters

2021-10-18T10:37:21Z

The SBI specification requires that sbi_system_reset() returns SBI_ERR_INVALID_PARAM if reset_type or reset_reason are not valid. Signed-off-by: Heinrich Schuchardt Reviewed-by: Atish Patra Reviewed-by: Xiang W

lib: sbi: Fix bug in sbi_ecall_rfence that misses checking

2021-08-20T04:12:39Z

In sbi_ecall_rfence_handler, it will compare the funcid with REMOTE_HFENCE_GVMA and REMOTE_HFENCE_VVMA_ASID. Later it check whether the misa includes H-extension. This checking is incomplete which misses REMOTE_HFENCE_GVMA_VMID and REMOTE_HFENCE_VVMA. Fix the issue by updating the checking range. Signed-off-by: Dong Du Reviewed-by: Atish Patra

lib: sbi: Allow custom local TLB flush function

2021-01-07T04:23:19Z

Currently, we have fixed TLB flush types supported by the remote TLB library. This approach is not flexible and does not allow custom local TLB flush function. For example, after updating PMP entries on a set of HARTs at runtime, we have to flush TLB on these HARTs as well. To support custom local TLB flush function, we replace the "type" field of "struct sbi_tlb_info" with a local TLB flush function pointer. We also provide definitions of standard TLB flush operations (such as fence_i, sfence.vma, hfence.vvma, hfence.gvma, etc). Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Replace args with trap registers in ecall handler

2021-01-07T04:23:14Z

We had added args pointer in ecall handler to ensure that ecall handler only implements functionality and does not deal with SBI calling convention. This also helped us to keep SBI calling convention related code in one place at sbi_ecall_handler(). The Keystone Enclavce project needs access to the trap regsiters in their ecall handler so that they can context switch enclaves in custom SBI calls. To help the Keystone Enclave project, we replace the args pointer in ecall handler parameter with a const pointer to trap registers. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Implement System Reset (SRST) SBI extension

2020-12-01T11:41:11Z

The SBI SRST extension has been accepted and merged in the latest SBI v0.3-draft specification. (Refer, https://github.com/riscv/riscv-sbi-doc) It allows to S-mode software to request system shutdown, cold reboot, and warm reboot. This patch implements SBI SRST extension as a replacement of the legacy sbi_shutdown() call of SBI v0.1 specification. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi_tlb: Fix remote TLB HFENCE VVMA implementation

2020-05-07T03:25:38Z

The HFENCE VVMA instructions flushes TLB based on the VMID present in HGATP CSR. To handle this, we get the current VMID for SBI HFENCE VVMA call and we use this current VMID to do remote TLB HFENCE VVMA on desired set of HARTs. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi_timer: Remove scratch parameter from most funcitons

2020-03-28T08:02:55Z

This patch removes scratch parameter from most sbi_timer functions. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi_ipi: Remove scratch parameter from most functions

2020-03-28T08:02:47Z

This patch removes scratch parameter from most sbi_ipi functions. Signed-off-by: Anup Patel Reviewed-by: Atish Patra