Cédric Le Goater cbc06f051c powerpc/xive: Do not skip CPU-less nodes when creating the IPIs ... On PowerVM, CPU-less nodes can be populated with hot-plugged CPUs at runtime. Today, the IPI is not created for such nodes, and hot-plugged CPUs use a bogus IPI, which leads to soft lockups. We can not directly allocate and request the IPI on demand because bringup_up() is called under the IRQ sparse lock. The alternative is to allocate the IPIs for all possible nodes at startup and to request the mapping on demand when the first CPU of a node is brought up. Fixes: 7dcc37b3ef ("powerpc/xive: Map one IPI interrupt per node") Cc: stable@vger.kernel.org # v5.13 Reported-by: Geetika Moolchandani <Geetika.Moolchandani1@ibm.com> Signed-off-by: Cédric Le Goater <clg@kaod.org> Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Tested-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210807072057.184698-1-clg@kaod.org		2021-08-12 22:31:41 +10:00
..
common.c	powerpc/xive: Do not skip CPU-less nodes when creating the IPIs	2021-08-12 22:31:41 +10:00
Kconfig	powerpc: Move the use of irq_domain_add_nomap() behind a config option	2021-06-10 13:09:17 +01:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
native.c	powerpc/xive: Use the "ibm, chip-id" property only under PowerNV	2021-04-17 10:40:51 +10:00
spapr.c	powerpc/xive: use true and false for bool variable	2021-03-29 13:22:13 +11:00
xive-internal.h	powerpc/xive: Use the "ibm, chip-id" property only under PowerNV	2021-04-17 10:40:51 +10:00