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

PATCH [email protected] 1 participant 1 message Jun 15, 2017

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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 <[email protected]> know about it.

Quoted 1 line

From foo@baz Thu Jun 15 11:12:23 CEST 2017

From: Benjamin Herrenschmidt <[email protected]>
Date: Tue, 23 May 2017 21:53:46 -0400
Subject: powerpc/powernv: Properly set "host-ipi" on IPIs

From: Benjamin Herrenschmidt <[email protected]>

[ Upstream commit f83e6862047e1e371bdc5d512dd6cabe8a3965b8 ]

Otherwise KVM will fail to pass them through to the host

---
 arch/powerpc/sysdev/xics/icp-opal.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
arch/powerpc/sysdev/xics/icp-opal.c +4 -2
@@ -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 [email protected] are

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