From 8e036c8d30a2cd9d8fc7442fbf6824e0a3e986e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@kaod.org>
Date: Tue, 13 Feb 2018 09:47:12 +0100
Subject: [PATCH] powerpc/xive: Use hw CPU ids when configuring the CPU queues
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References: bsc#1085030
Patch-mainline: v4.16-rc2
Git-commit: 8e036c8d30a2cd9d8fc7442fbf6824e0a3e986e7
The CPU event notification queues on sPAPR should be configured using
a hardware CPU identifier.
The problem did not show up on the Power Hypervisor because pHyp
supports 8 threads per core which keeps CPU number contiguous. This is
not the case on all sPAPR virtual machines, some use SMT=1.
Also improve error logging by adding the CPU number.
Fixes: eac1e731b59e ("powerpc/xive: guest exploitation of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
arch/powerpc/sysdev/xive/spapr.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c
index d9c4c9366049..091f1d0d0af1 100644
--- a/arch/powerpc/sysdev/xive/spapr.c
+++ b/arch/powerpc/sysdev/xive/spapr.c
@@ -356,7 +356,8 @@ static int xive_spapr_configure_queue(u32 target, struct xive_q *q, u8 prio,
rc = plpar_int_get_queue_info(0, target, prio, &esn_page, &esn_size);
if (rc) {
- pr_err("Error %lld getting queue info prio %d\n", rc, prio);
+ pr_err("Error %lld getting queue info CPU %d prio %d\n", rc,
+ target, prio);
rc = -EIO;
goto fail;
}
@@ -370,7 +371,8 @@ static int xive_spapr_configure_queue(u32 target, struct xive_q *q, u8 prio,
/* Configure and enable the queue in HW */
rc = plpar_int_set_queue_config(flags, target, prio, qpage_phys, order);
if (rc) {
- pr_err("Error %lld setting queue for prio %d\n", rc, prio);
+ pr_err("Error %lld setting queue for CPU %d prio %d\n", rc,
+ target, prio);
rc = -EIO;
} else {
q->qpage = qpage;
@@ -389,8 +391,8 @@ static int xive_spapr_setup_queue(unsigned int cpu, struct xive_cpu *xc,
if (IS_ERR(qpage))
return PTR_ERR(qpage);
- return xive_spapr_configure_queue(cpu, q, prio, qpage,
- xive_queue_shift);
+ return xive_spapr_configure_queue(get_hard_smp_processor_id(cpu),
+ q, prio, qpage, xive_queue_shift);
}
static void xive_spapr_cleanup_queue(unsigned int cpu, struct xive_cpu *xc,
@@ -399,10 +401,12 @@ static void xive_spapr_cleanup_queue(unsigned int cpu, struct xive_cpu *xc,
struct xive_q *q = &xc->queue[prio];
unsigned int alloc_order;
long rc;
+ int hw_cpu = get_hard_smp_processor_id(cpu);
- rc = plpar_int_set_queue_config(0, cpu, prio, 0, 0);
+ rc = plpar_int_set_queue_config(0, hw_cpu, prio, 0, 0);
if (rc)
- pr_err("Error %ld setting queue for prio %d\n", rc, prio);
+ pr_err("Error %ld setting queue for CPU %d prio %d\n", rc,
+ hw_cpu, prio);
alloc_order = xive_alloc_order(xive_queue_shift);
free_pages((unsigned long)q->qpage, alloc_order);
--
2.13.6