mbox series

[v2,0/8] Add support for Smepmp

Message ID 20230706104928.3391947-1-hchauhan@ventanamicro.com
Headers show
Series Add support for Smepmp | expand

Message

Himanshu Chauhan July 6, 2023, 10:49 a.m. UTC 
This patch series adds support for the Smepmp specification.
The detection of Smepmp support in platform depends on the
ISA string present in the FDT. If "smepmp" is present in ISA
string in FDT, Smepmp is enabled.

When Smepmp is enabled, the M-mode software's free access
to S/U memory region is revoked. Hence, all the shared
memory access between M-mode and S/U-mode must be done
only after mapping the shared memory.

changes in v2:
* Split into futher patches
	- FDT ISA string parsing is now separate patch
	- Map/Unmap functions for shared memory are in different patch
* Addressed other general comments.

Himanshu Chauhan (8):
  include: sbi: Add macro definitions for mseccfg CSR
  lib: sbi: Add functions to manipulate PMP entries
  include: sbi: Add Smepmp specific access flags for PMP entries
  lib: sbi: Add smepmp in hart extensions
  lib: utils: Add detection of Smepmp from ISA string in FDT
  lib: sbi: Add support for Smepmp
  lib: sbi: Add functions to map/unmap shared memory
  lib: sbi: Map/Unmap debug console shared memory buffers

 include/sbi/riscv_asm.h            |   6 +
 include/sbi/riscv_encoding.h       |  12 ++
 include/sbi/sbi_domain.h           |  84 +++++++++++++-
 include/sbi/sbi_hart.h             |  19 ++++
 include/sbi_utils/fdt/fdt_helper.h |   3 +
 lib/sbi/riscv_asm.c                |  42 +++++++
 lib/sbi/sbi_domain.c               |  14 ++-
 lib/sbi/sbi_ecall_dbcn.c           |   3 +
 lib/sbi/sbi_hart.c                 | 177 +++++++++++++++++++++++++----
 lib/sbi/sbi_init.c                 |  22 ++--
 lib/utils/fdt/fdt_helper.c         | 111 ++++++++++++++++++
 platform/generic/platform.c        |   9 ++
 12 files changed, 464 insertions(+), 38 deletions(-)