| Message ID | 1533637471-30953-1-git-send-email-joro@8bytes.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | PTI for x86-32 Fixes | expand |
On Tue, 2018-08-07 at 12:24 +0200, Joerg Roedel wrote: > 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(-) I've tested this in a VM and on an Atom laptop, as usual. No regressions noted. Tested-by: David H. Gutteridge <dhgutteridge@sympatico.ca> Regards, Dave
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(-)