Patch "powerpc/powernv: Properly set "host-ipi" on IPIs" has been added to the 4.9-stable tree

Patch "powerpc/powernv: Properly set "host-ipi" on IPIs" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    powerpc/powernv: Properly set "host-ipi" on IPIs

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     powerpc-powernv-properly-set-host-ipi-on-ipis.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Jun 15 11:12:23 CEST 2017
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Tue, 23 May 2017 21:53:46 -0400
Subject: powerpc/powernv: Properly set "host-ipi" on IPIs

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();
 }


Patches currently in stable-queue which might be from benh@kernel.crashing.org are

queue-4.9/powerpc-powernv-properly-set-host-ipi-on-ipis.patch