Searched hist:"1 a4b739bbb4f8857d1b4feb46d6b3ec72269c111" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/arch/powerpc/kernel/ |
| H A D | head_booke.h | diff 1a4b739bbb4f8857d1b4feb46d6b3ec72269c111 Tue Apr 30 07:39:03 CDT 2019 Christophe Leroy <christophe.leroy@c-s.fr> powerpc/32: implement fast entry for syscalls on BOOKE
This patch implements a fast entry for syscalls.
Syscalls don't have to preserve non volatile registers except LR.
This patch then implement a fast entry for syscalls, where
volatile registers get clobbered.
As this entry is dedicated to syscall it always sets MSR_EE
and warns in case MSR_EE was previously off
It also assumes that the call is always from user, system calls are
unexpected from kernel.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
|
| H A D | head_44x.S | diff 1a4b739bbb4f8857d1b4feb46d6b3ec72269c111 Tue Apr 30 07:39:03 CDT 2019 Christophe Leroy <christophe.leroy@c-s.fr> powerpc/32: implement fast entry for syscalls on BOOKE
This patch implements a fast entry for syscalls.
Syscalls don't have to preserve non volatile registers except LR.
This patch then implement a fast entry for syscalls, where
volatile registers get clobbered.
As this entry is dedicated to syscall it always sets MSR_EE
and warns in case MSR_EE was previously off
It also assumes that the call is always from user, system calls are
unexpected from kernel.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
|
| H A D | entry_32.S | diff 1a4b739bbb4f8857d1b4feb46d6b3ec72269c111 Tue Apr 30 07:39:03 CDT 2019 Christophe Leroy <christophe.leroy@c-s.fr> powerpc/32: implement fast entry for syscalls on BOOKE
This patch implements a fast entry for syscalls.
Syscalls don't have to preserve non volatile registers except LR.
This patch then implement a fast entry for syscalls, where
volatile registers get clobbered.
As this entry is dedicated to syscall it always sets MSR_EE
and warns in case MSR_EE was previously off
It also assumes that the call is always from user, system calls are
unexpected from kernel.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
|