Messages in this thread | | | From | Joerg Roedel <> | Subject | [PATCH 0/3] PTI for x86-32 Fixes | Date | Tue, 7 Aug 2018 12:24:28 +0200 |
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Hi,
here is a small patch-set to fix two small issues in the PTI implementation for 32 bit x86. The issues are:
1) Fix the 32 bit PCID check. I used the wrong operator there and this caused false-positive warnings.
2) The other two patches make sure the init-hole is not mapped into the user page-table. It is the 32 bit counterpart to commit
c40a56a7818c ('x86/mm/init: Remove freed kernel image areas from alias mapping')
for the 64 bit PTI implementation.
I tested that no-PAE, PAE and 64 bit kernel all boot and have correct user page-tables with identical global mappings between user and kernel.
Regards,
Joerg
Joerg Roedel (3): x86/mm/pti: Fix 32 bit PCID check x86/mm/pti: Don't clear permissions in pti_clone_pmd() x86/mm/pti: Clone kernel-image on PTE level for 32 bit
arch/x86/mm/pti.c | 143 ++++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 100 insertions(+), 43 deletions(-)
-- 2.7.4
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