mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-06 08:46:46 +00:00
Code Issues Releases Wiki Activity

powerpc: Select either privileged or hypervisor doorbell when sending

Browse source 
On book3s we have two msgsnd instructions with differing privilege
levels. This patch selects the appropriate instruction to use whenever
we send a doorbell interrupt.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Ian Munsie 2012-11-14 18:49:47 +00:00 committed by Benjamin Herrenschmidt
parent 1dbdafec5d
commit 919ca8681f
1 changed files with 14 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
arch/powerpc/include/asm/dbell.h
View file

@ -37,12 +37,25 @@ enum ppc_dbell {
#define SPRN_DOORBELL_CPUTAG SPRN_TIR
#define PPC_DBELL_TAG_MASK 0x7f
static inline void _ppc_msgsnd(u32 msg)
{
if (cpu_has_feature(CPU_FTR_HVMODE))
__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
else
__asm__ __volatile__ (PPC_MSGSNDP(%0) : : "r" (msg));
}
#else /* CONFIG_PPC_BOOK3S */
#define PPC_DBELL_MSGTYPE PPC_DBELL
#define SPRN_DOORBELL_CPUTAG SPRN_PIR
#define PPC_DBELL_TAG_MASK 0x3fff
static inline void _ppc_msgsnd(u32 msg)
{
__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
}
#endif /* CONFIG_PPC_BOOK3S */
extern void doorbell_cause_ipi(int cpu, unsigned long data);
@ -54,7 +67,7 @@ static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
(tag & 0x07ffffff);
__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
_ppc_msgsnd(msg);
}
#endif /* _ASM_POWERPC_DBELL_H */