Searched hist:"3415046472216 edf2aa3f6c7460167489dd296bd" (Results 1 – 1 of 1) sorted by relevance
| /optee_os/core/mm/ |
| H A D | core_mmu.c | 3415046472216edf2aa3f6c7460167489dd296bd Fri Jan 24 10:08:07 UTC 2025 Jens Wiklander <jens.wiklander@linaro.org> core: fix partially unmapped MEM_AREA_TEE_RAM_RW
The commit 06a258064a92 ("core: mm: allow unmapping VCORE_FREE") allows
unmapping pages from the VCORE_FREE virtual memory range, but no
bookkeeping is added apart from what's recorded in the translation
tables. Later, the commit 7c9b85432343 ("core: allow partially unmapped
MEM_AREA_TEE_RAM_RW") does lookups the translation tables using
arch_va2pa_helper() to find out if pages in the VCORE_FREE virtual
memory range are mapped. This works well on arm, but not on riscv which
must traverse the translation tables in software and then is caught in
an infinite recursive loop.
Fix this problem by updating the memory regions in the struct memory_map
(splitting, shrinking, and removing) as needed.
Reported-by: Huang Borong <huangborong@bosc.ac.cn>
Closes: https://github.com/OP-TEE/optee_os/issues/7237
Fixes: 06a258064a92 ("core: mm: allow unmapping VCORE_FREE")
Fixes: 7c9b85432343 ("core: allow partially unmapped MEM_AREA_TEE_RAM_RW")
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
|