[PATCH 4.9 023/108] powerpc/powernv: Properly set "host-ipi" on IPIs

Greg Kroah-Hartman
2017-06-15T17:58:36Z

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

[ Upstream commit f83e6862047e1e371bdc5d512dd6cabe8a3965b8 ]

Otherwise KVM will fail to pass them through to the host

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/sysdev/xics/icp-opal.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/arch/powerpc/sysdev/xics/icp-opal.c
+++ b/arch/powerpc/sysdev/xics/icp-opal.c
@@ -130,14 +130,16 @@ static void icp_opal_cause_ipi(int cpu,
{
int hw_cpu = get_hard_smp_processor_id(cpu);

+ kvmppc_set_host_ipi(cpu, 1);
opal_int_set_mfrr(hw_cpu, IPI_PRIORITY);
}

static irqreturn_t icp_opal_ipi_action(int irq, void *dev_id)
{
- int hw_cpu = hard_smp_processor_id();
+ int cpu = smp_processor_id();

- opal_int_set_mfrr(hw_cpu, 0xff);
+ kvmppc_set_host_ipi(cpu, 0);
+ opal_int_set_mfrr(get_hard_smp_processor_id(cpu), 0xff);

return smp_ipi_demux();
}