diff options
| author | Ian Munsie <imunsie@au1.ibm.com> | 2012-11-14 19:49:47 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-01-10 05:09:06 +0100 |
| commit | 919ca8681f48ce81848c76f0ed66edb1bb99209b (patch) | |
| tree | b0aebbe1929e653e9a8b19196e64853baf58f2d6 | |
| parent | powerpc: Add book3s privileged doorbell exception vectors (diff) | |
| download | linux-919ca8681f48ce81848c76f0ed66edb1bb99209b.tar.xz linux-919ca8681f48ce81848c76f0ed66edb1bb99209b.zip | |
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: Ian Munsie <imunsie@au1.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/include/asm/dbell.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/dbell.h b/arch/powerpc/include/asm/dbell.h index 3b338565f992..5fa6b20eba10 100644 --- a/arch/powerpc/include/asm/dbell.h +++ b/arch/powerpc/include/asm/dbell.h @@ -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 */ |