Le 08/04/2021 à 16:06, Nathan Lynch a écrit :
This is a reroll of the series posted here: https://lore.kernel.org/linuxppc-dev/20210114220004.1138993-1-nath...@linux.ibm.com/ Originally this work was prompted by failures on radix MMU PowerVM guests when passing buffers to RTAS that lay outside of its idea of the RMA. In v1 I approached this as a problem to be solved in Linux, but RTAS development has since decided to change their code so that the RMA restriction does not apply with radix. So in v2 I retain the cleanups and discard the more significant change which accommodated the misbehaving RTAS versions.
Is there a link with https://github.com/linuxppc/issues/issues/252 ?
Changes since v1: - Correct missing conversion of RTAS_RMOBUF_MAX -> RTAS_USER_REGION_SIZE in in_rmo_buf(). - Remove unnecessary braces in rtas_syscall_filter_init(). - Leave expression of RTAS_WORK_AREA_SIZE as-is instead of changing the factors in a confusing way, per discussion with Alexey. - Drop "powerpc/rtas: constrain user region allocation to RMA" Nathan Lynch (5): powerpc/rtas: improve ppc_rtas_rmo_buf_show documentation powerpc/rtas-proc: remove unused RMO_READ_BUF_MAX powerpc/rtas: remove ibm_suspend_me_token powerpc/rtas: move syscall filter setup into separate function powerpc/rtas: rename RTAS_RMOBUF_MAX to RTAS_USER_REGION_SIZE arch/powerpc/include/asm/rtas.h | 6 +++--- arch/powerpc/kernel/rtas-proc.c | 15 +++++++++++---- arch/powerpc/kernel/rtas.c | 34 +++++++++++++++++---------------- 3 files changed, 32 insertions(+), 23 deletions(-)
