software/src/opensbi.git/lib/sbi/sbi_hart_protection.c, branch master

lib: sbi: Rename map_range/unmap_range functions

2026-09-05T07:22:39+00:00

*_map_range and *_unmap_range functions are required in M-Mode to get the temporary access to S-Mode and U-Mode regions. Thse functions only operate using the TYPE_MEMORY memory protection mechanisms. Rename them to reflect the actual usage of these functions and let generic map/unmap_range names to implement generic functions Signed-off-by: Rahul Pathak Reviewed-by: Anup Patel Reviewed-by: Pawandeep Oza Link: https://lore.kernel.org/r/20260820121309.2551296-2-rahul.pathak@oss.qualcomm.com Signed-off-by: Anup Patel

lib: sbi: Print list of all hart protection mechanisms at boot time

2026-08-02T09:47:12+00:00

Instead of printing only the best hart memory protection name at boot time let's print a list of all hart projection mechanisms. Signed-off-by: Anup Patel Reviewed-by: Rahul Pathak Link: https://lore.kernel.org/r/20260727042504.1743250-6-anup.patel@oss.qualcomm.com Signed-off-by: Anup Patel

lib: sbi: Extend hart protection abstraction to allow ID configuration

2026-08-02T09:47:12+00:00

There are various ID configuration ISA extensions such as RISC-V Worlds, Supervisor domain ID, QoS ID, etc which need to be re-configured upon domain context switch on a hart. Extend hart protection abstraction to support both memory protection and ID configuration ISA extensions. Signed-off-by: Anup Patel Reviewed-by: Rahul Pathak Link: https://lore.kernel.org/r/20260727042504.1743250-5-anup.patel@oss.qualcomm.com Signed-off-by: Anup Patel

lib: sbi: Add domain parameter to hart protection (un)configure()

2026-08-02T09:47:12+00:00

The switch_to_next_domain_context() already has the pointers to current and next domains so pass them as parameters to hart protection configure() and unconfigure() callbacks. Signed-off-by: Anup Patel Reviewed-by: Rahul Pathak Link: https://lore.kernel.org/r/20260727042504.1743250-4-anup.patel@oss.qualcomm.com Signed-off-by: Anup Patel

lib: sbi: Introduce sbi_hart_protection_reconfigure() function

2026-08-02T09:47:12+00:00

Instead of assuming that hart protection reconfiguration is unconfigure followed by configure, introduce a separate sbi_hart_protection_reconfigure() function and use it in switch_to_next_domain_context(). Signed-off-by: Anup Patel Reviewed-by: Rahul Pathak Link: https://lore.kernel.org/r/20260727042504.1743250-3-anup.patel@oss.qualcomm.com Signed-off-by: Anup Patel

lib: sbi: Fix behavior on platform without HART protection

2026-01-08T08:48:14+00:00

The commit 42139bb9b7dc ("lib: sbi: Replace sbi_hart_pmp_xyz() and sbi_hart_map/unmap_addr()") changed logic by calling sbi_hart_protection_configure(). But when protection doesn't exist the function is returning SBI_EINVAL. But on systems without protection this is correct configuration that's why do not hang when system don't have any HART protection. Fixes: 42139bb9b7dc ("lib: sbi: Replace sbi_hart_pmp_xyz() and sbi_hart_map/unmap_addr()") Signed-off-by: Michal Simek Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/bb8641e5f82654e3989537cea85f165f67a7044e.1767801896.git.michal.simek@amd.com Signed-off-by: Anup Patel

lib: sbi: Introduce hart protection abstraction

2025-12-16T14:46:47+00:00

Currently, PMP and ePMP are the only hart protection mechanisms available in OpenSBI but new protection mechanisms (such as Smmpt) will be added in the near future. To allow multiple hart protection mechanisms, introduce hart protection abstraction and related APIs. Signed-off-by: Anup Patel Link: https://lore.kernel.org/r/20251209135235.423391-3-apatel@ventanamicro.com Signed-off-by: Anup Patel