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| author | Suresh Warrier <warrier@linux.vnet.ibm.com> | 2015-12-17 23:59:04 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2016-02-29 08:25:06 +0300 |
| commit | 31639c77e0a7f9f742c813ae697f337b44981ed2 (patch) | |
| tree | fc6afc967e3c321c703d1278761d351cf9733e64 /arch/powerpc/include/asm | |
| parent | bd7f561f76563f0b21701628874d8adc863b0c25 (diff) | |
| download | linux-31639c77e0a7f9f742c813ae697f337b44981ed2.tar.xz | |
powerpc/smp: Add smp_muxed_ipi_set_message
smp_muxed_ipi_message_pass() invokes smp_ops->cause_ipi, which
uses an ioremapped address to access registers on the XICS
interrupt controller to cause the IPI. Because of this real
mode callers cannot call smp_muxed_ipi_message_pass() for IPI
messaging.
This patch creates a separate function smp_muxed_ipi_set_message
just to set the IPI message without the cause_ipi routine.
After calling this function to set the IPI message, real
mode callers must cause the IPI by writing to the XICS registers
directly.
As part of this, we also change smp_muxed_ipi_message_pass
to call smp_muxed_ipi_set_message to set the message instead
of doing it directly inside the routine.
Signed-off-by: Suresh Warrier <warrier@linux.vnet.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/smp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h index 9ef9c37cb398..78083ed20792 100644 --- a/arch/powerpc/include/asm/smp.h +++ b/arch/powerpc/include/asm/smp.h @@ -124,6 +124,7 @@ extern const char *smp_ipi_name[]; /* for irq controllers with only a single ipi */ extern void smp_muxed_ipi_set_data(int cpu, unsigned long data); extern void smp_muxed_ipi_message_pass(int cpu, int msg); +extern void smp_muxed_ipi_set_message(int cpu, int msg); extern irqreturn_t smp_ipi_demux(void); void smp_init_pSeries(void); |