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x86/pgtable: Rename pti_set_user_pgd() to pti_set_user_pgtbl() 

The way page-table folding is implemented on 32 bit, these functions are
not only setting, but also PUDs and even PMDs. Give the function a more
generic name to reflect that.

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/1531906876-13451-16-git-send-email-joro@8bytes.org
zero-colors
Joerg Roedel 2018-07-18 11:40:52 +02:00 committed by Thomas Gleixner
parent 252e1a0526
commit 23b772883d
2 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/x86/include/asm/pgtable_64.h
View File

@ -196,21 +196,21 @@ static inline bool pgdp_maps_userspace(void *__ptr)
}
#ifdef CONFIG_PAGE_TABLE_ISOLATION
pgd_t __pti_set_user_pgd(pgd_t *pgdp, pgd_t pgd);
pgd_t __pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd);
/*
* Take a PGD location (pgdp) and a pgd value that needs to be set there.
* Populates the user and returns the resulting PGD that must be set in
* the kernel copy of the page tables.
*/
static inline pgd_t pti_set_user_pgd(pgd_t *pgdp, pgd_t pgd)
static inline pgd_t pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd)
{
if (!static_cpu_has(X86_FEATURE_PTI))
return pgd;
return __pti_set_user_pgd(pgdp, pgd);
return __pti_set_user_pgtbl(pgdp, pgd);
}
#else
static inline pgd_t pti_set_user_pgd(pgd_t *pgdp, pgd_t pgd)
static inline pgd_t pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd)
{
return pgd;
}
@ -226,7 +226,7 @@ static inline void native_set_p4d(p4d_t *p4dp, p4d_t p4d)
}
pgd = native_make_pgd(native_p4d_val(p4d));
pgd = pti_set_user_pgd((pgd_t *)p4dp, pgd);
pgd = pti_set_user_pgtbl((pgd_t *)p4dp, pgd);
*p4dp = native_make_p4d(native_pgd_val(pgd));
}
@ -237,7 +237,7 @@ static inline void native_p4d_clear(p4d_t *p4d)
static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
{
*pgdp = pti_set_user_pgd(pgdp, pgd);
*pgdp = pti_set_user_pgtbl(pgdp, pgd);
}
static inline void native_pgd_clear(pgd_t *pgd)

2
arch/x86/mm/pti.c
View File

@ -117,7 +117,7 @@ enable:
setup_force_cpu_cap(X86_FEATURE_PTI);
}
pgd_t __pti_set_user_pgd(pgd_t *pgdp, pgd_t pgd)
pgd_t __pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd)
{
/*
* Changes to the high (kernel) portion of the kernelmode page