Juergen Gross 4aaf269c76 mm: introduce arch_has_hw_nonleaf_pmd_young() ... When running as a Xen PV guests commit eed9a328aa ("mm: x86: add CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG") can cause a protection violation in pmdp_test_and_clear_young(): BUG: unable to handle page fault for address: ffff8880083374d0 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 3026067 P4D 3026067 PUD 3027067 PMD 7fee5067 PTE 8010000008337065 Oops: 0003 [#1] PREEMPT SMP NOPTI CPU: 7 PID: 158 Comm: kswapd0 Not tainted 6.1.0-rc5-20221118-doflr+ #1 RIP: e030:pmdp_test_and_clear_young+0x25/0x40 This happens because the Xen hypervisor can't emulate direct writes to page table entries other than PTEs. This can easily be fixed by introducing arch_has_hw_nonleaf_pmd_young() similar to arch_has_hw_pte_young() and test that instead of CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG. Link: https://lkml.kernel.org/r/20221123064510.16225-1-jgross@suse.com Fixes: eed9a328aa ("mm: x86: add CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG") Signed-off-by: Juergen Gross <jgross@suse.com> Reported-by: Sander Eikelenboom <linux@eikelenboom.it> Acked-by: Yu Zhao <yuzhao@google.com> Tested-by: Sander Eikelenboom <linux@eikelenboom.it> Acked-by: David Hildenbrand <david@redhat.com> [core changes] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-11-30 14:49:41 -08:00
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acpi	ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init()	2022-10-13 20:40:09 +02:00
asm-generic	asm-generic: compat: fix compat_arg_u64() and compat_arg_u64_dual()	2022-11-01 10:20:11 +11:00
clocksource	…
crypto	…
drm	Merge drm/drm-fixes into drm-misc-fixes	2022-10-20 09:09:00 +02:00
dt-bindings	These are the pin control changes for the v6.1 kernel cycle:	2022-10-11 10:59:59 -07:00
keys	…
kunit	…
kvm	…
linux	mm: introduce arch_has_hw_nonleaf_pmd_young()	2022-11-30 14:49:41 -08:00
math-emu	…
media	media fixes for v6.1-rc2	2022-10-22 15:30:15 -07:00
memory	…
misc	…
net	netlink: introduce bigendian integer types	2022-11-01 21:29:06 -07:00
pcmcia	…
ras	…
rdma	…
rv	…
scsi	…
soc	RISC-V Patches for the 6.1 Merge Window, Part 2	2022-10-14 11:21:11 -07:00
sound	ASoC: Fixes for v6.1	2022-10-27 08:26:32 +02:00
target	…
trace	mm/khugepaged: refactor mm_khugepaged_scan_file tracepoint to remove filename from function call	2022-11-22 18:50:41 -08:00
uapi	- Rename a perf memory level event define to denote it is of CXL type	2022-10-30 09:49:18 -07:00
ufs	…
vdso	…
video	…
xen	xen/virtio: enable grant based virtio on x86	2022-10-10 14:31:26 +02:00