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powerpc: Select either privileged or hypervisor doorbell when sending

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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
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15
arch/powerpc/include/asm/dbell.h
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@ -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 */