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author | Juergen Gross <jgross@suse.com> | 2023-03-06 15:32:59 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-19 17:21:02 +0300 |
commit | 6b54f5c68474edc241434ab50bae4a08ce45f835 (patch) | |
tree | 36b45f084ae519ffcfdbf04aff057873ac4d903e /arch/arm/lib/testclearbit.S | |
parent | 3745f628c3288a6e77851de5ed408bf99a05e5db (diff) | |
download | linux-6b54f5c68474edc241434ab50bae4a08ce45f835.tar.xz |
x86/mm: Fix __swp_entry_to_pte() for Xen PV guests
[ Upstream commit 0f88130e8a6fd185b0aeb5d8e286083735f2585a ]
Normally __swp_entry_to_pte() is never called with a value translating
to a valid PTE. The only known exception is pte_swap_tests(), resulting
in a WARN splat in Xen PV guests, as __pte_to_swp_entry() did
translate the PFN of the valid PTE to a guest local PFN, while
__swp_entry_to_pte() doesn't do the opposite translation.
Fix that by using __pte() in __swp_entry_to_pte() instead of open
coding the native variant of it.
For correctness do the similar conversion for __swp_entry_to_pmd().
Fixes: 05289402d717 ("mm/debug_vm_pgtable: add tests validating arch helpers for core MM features")
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230306123259.12461-1-jgross@suse.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/arm/lib/testclearbit.S')
0 files changed, 0 insertions, 0 deletions