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Commit 919ca868 authored by Ian Munsie's avatar Ian Munsie Committed by Benjamin Herrenschmidt
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powerpc: Select either privileged or hypervisor doorbell when sending 



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: default avatarIan Munsie <imunsie@au1.ibm.com>
Tested-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 1dbdafec

arch/powerpc/include/asm/dbell.h

+14 −1
Original line number Diff line number Diff line
@@ -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 */