On 05/16/2018 10:35 PM, Ram Pai wrote:
So let me see if I understand the overall idea.
Application can allocate new keys through a new syscall
sys_pkey_alloc_1(flags, init_val, sig_init_val)
'sig_init_val' is the permission-state of the key in signal context.
I would keep the existing system call and just add a flag, say
PKEY_ALLOC_SETSIGNAL. If the current thread needs different access
rights, it can set those rights just after pkey_alloc returns. There is
no race that matters here, I think.