Messages in this thread Patch in this message | | | Date | Thu, 19 Jul 2018 16:30:34 -0700 | From | tip-bot for Joerg Roedel <> | Subject | [tip:x86/pti] x86/mm/legacy: Populate the user page-table with user pgd's |
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Commit-ID: 1f40a46cf47c12d93a5ad9dccd82bd36ff8f956a Gitweb: https://git.kernel.org/tip/1f40a46cf47c12d93a5ad9dccd82bd36ff8f956a Author: Joerg Roedel <jroedel@suse.de> AuthorDate: Wed, 18 Jul 2018 11:41:00 +0200 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Fri, 20 Jul 2018 01:11:43 +0200
x86/mm/legacy: Populate the user page-table with user pgd's
Also populate the user-spage pgd's in the user page-table.
Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Pavel Machek <pavel@ucw.cz> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: linux-mm@kvack.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: David Laight <David.Laight@aculab.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Eduardo Valentin <eduval@amazon.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Will Deacon <will.deacon@arm.com> Cc: aliguori@amazon.com Cc: daniel.gruss@iaik.tugraz.at Cc: hughd@google.com Cc: keescook@google.com Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Waiman Long <llong@redhat.com> Cc: "David H . Gutteridge" <dhgutteridge@sympatico.ca> Cc: joro@8bytes.org Link: https://lkml.kernel.org/r/1531906876-13451-24-git-send-email-joro@8bytes.org
--- arch/x86/include/asm/pgtable-2level.h | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/arch/x86/include/asm/pgtable-2level.h b/arch/x86/include/asm/pgtable-2level.h index 685ffe8a0eaf..c399ea5eea41 100644 --- a/arch/x86/include/asm/pgtable-2level.h +++ b/arch/x86/include/asm/pgtable-2level.h @@ -19,6 +19,9 @@ static inline void native_set_pte(pte_t *ptep , pte_t pte) static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) { +#ifdef CONFIG_PAGE_TABLE_ISOLATION + pmd.pud.p4d.pgd = pti_set_user_pgtbl(&pmdp->pud.p4d.pgd, pmd.pud.p4d.pgd); +#endif *pmdp = pmd; } @@ -58,6 +61,9 @@ static inline pte_t native_ptep_get_and_clear(pte_t *xp) #ifdef CONFIG_SMP static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp) { +#ifdef CONFIG_PAGE_TABLE_ISOLATION + pti_set_user_pgtbl(&xp->pud.p4d.pgd, __pgd(0)); +#endif return __pmd(xchg((pmdval_t *)xp, 0)); } #else @@ -67,6 +73,9 @@ static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp) #ifdef CONFIG_SMP static inline pud_t native_pudp_get_and_clear(pud_t *xp) { +#ifdef CONFIG_PAGE_TABLE_ISOLATION + pti_set_user_pgtbl(&xp->p4d.pgd, __pgd(0)); +#endif return __pud(xchg((pudval_t *)xp, 0)); } #else
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