opensbi.git/lib/sbi/sbi_init.c, branch v1.3

lib: sbi: Print scratch size and usage at boot time

2023-06-05T10:16:22Z

The scratch space being a scarce resource so let us print it's size and usage at boot time. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: sbi: Introduce simple heap allocator

2023-06-05T10:16:09Z

We provide simple heap allocator to manage the heap space provided by OpenSBI firmware and platform. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: sbi: Only register available extensions

2023-05-21T11:23:02Z

When an extension implements a probe function it means there's a chance that the extension is not available. Use this function in the register_extensions callback to determine if the extension should be registered at all. Where the probe implementation is simple, just open code the check. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi: Remove unnecessary semicolon

2023-05-11T07:01:34Z

We have redundant semicolon at quite a few places so let's remove it. Signed-off-by: Xiang W Reviewed-by: Anup Patel

lib: sbi: Add debug print when sbi_pmu_init fails

2023-04-20T08:49:44Z

Since sbi_pmu_init is called after sbi_console_init, the sbi_printf can be called when sbi_pmu_init fails. Signed-off-by: Tan En De Reviewed-by: Atish Patra

lib: sbi: Print the CPPC device name

2023-04-07T04:06:42Z

If CPPC device is registered by the platform, print its name. Signed-off-by: Sunil V L Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi: Introduce sbi_entry_count() function

2023-04-06T13:18:15Z

We introduce sbi_entry_count() function which counts the number of times a HART enters OpenSBI via cold-boot or warm-boot path. Signed-off-by: Anup Patel

lib: sbi: Clear IPIs before init_warm_startup in non-boot harts

2023-03-10T08:43:40Z

Since commit 50d4fde1c5a4 ("lib: Remove redundant sbi_platform_ipi_clear() calls"), the IPI sent from the boot hart in wake_coldboot_harts() is not cleared in the secondary harts until they reach sbi_ipi_init(). However, sbi_hsm_init() and sbi_hsm_hart_wait() are called earlier, so a secondary hart might enter sbi_hsm_hart_wait() with an already pending IPI. sbi_hsm_hart_wait() makes sure the hart leaves the loop only when it is actually ready, so a pending unrelated IPI should not cause safety issues. However, it might be inefficient on certain hardware, because it prevents "wfi" from stalling the hart even if the hardware supports this, making the hart needlessly spin in a "busy-wait" loop. This behaviour can be observed, for example, in a QEMU VM (QEMU 7.2.0) with "-machine virt" running a Linux guest. Inserting delays in sbi_hsm_hart_start() allows reproducing the issue more reliably. The comment in wait_for_coldboot() suggests that the initial IPI is needed in the warm resume path, so let us clear it before init_warm_startup() only. To do this, sbi_ipi_raw_clear() was created similar to sbi_ipi_raw_send(). Signed-off-by: Evgenii Shatokhin Reviewed-by: Anup Patel

lib: sbi: Refactor the calls to sbi_hart_switch_mode()

2023-03-10T08:30:36Z

Move them into sbi_hsm_hart_start_finish() and sbi_hsm_hart_resume_finish() to make them easier to manage. This will be used by subsequent patches. Suggested-by: Anup Patel Signed-off-by: Evgenii Shatokhin Reviewed-by: Anup Patel

lib: sbi: Add system suspend skeleton

2023-02-27T14:13:52Z

Add the SUSP extension probe and ecall support, but for now the system suspend function is just a stub. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel