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[N,5/6] s390: enable MHP_MEMMAP_ON_MEMORY

Message ID 20240319130415.495851-6-frank.heimes@canonical.com
State New
Headers show
Series Memory hotplug vmem pages (s390x) (LP: 2051835) | expand

Commit Message

Frank Heimes March 19, 2024, 1:04 p.m. UTC 
From: Sumanth Korikkar <sumanthk@linux.ibm.com>

BugLink: https://bugs.launchpad.net/bugs/2051835

Enable MHP_MEMMAP_ON_MEMORY to support "memmap on memory".
memory_hotplug.memmap_on_memory=true kernel parameter should be set in
kernel boot option to enable the feature.

Link: https://lkml.kernel.org/r/20240108132747.3238763-6-sumanthk@linux.ibm.com
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit 9eda317c15ff13be621d219a5de365d1550f41f7)
Signed-off-by: Frank Heimes <frank.heimes@canonical.com>
---
 arch/s390/Kconfig | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index fe565f3a3a91..a1d6dcbc8965 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -113,6 +113,7 @@  config S390
 	select ARCH_INLINE_WRITE_UNLOCK_BH
 	select ARCH_INLINE_WRITE_UNLOCK_IRQ
 	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
+	select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
 	select ARCH_STACKWALK
 	select ARCH_SUPPORTS_ATOMIC_RMW
 	select ARCH_SUPPORTS_DEBUG_PAGEALLOC