linux-kernel - [tip:x86/mm] x86/mm: Create native_make_p4d() for PGTABLE

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Message-ID: <tip-db516997a985b461f021d594e78155bbc7fc3e7e@git.kernel.org>
Date:   Tue, 18 Jul 2017 03:59:45 -0700
From:   tip-bot for Tom Lendacky <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     aryabinin@...tuozzo.com, mingo@...nel.org, tglx@...utronix.de,
        toshi.kani@....com, dvyukov@...gle.com, lwoodman@...hat.com,
        konrad.wilk@...cle.com, arnd@...db.de, riel@...hat.com,
        thomas.lendacky@....com, corbet@....net,
        linux-kernel@...r.kernel.org, matt@...eblueprint.co.uk,
        torvalds@...ux-foundation.org, bp@...en8.de, glider@...gle.com,
        rkrcmar@...hat.com, brijesh.singh@....com, hpa@...or.com,
        luto@...nel.org, mst@...hat.com, dyoung@...hat.com,
        pbonzini@...hat.com, peterz@...radead.org
Subject: [tip:x86/mm] x86/mm: Create native_make_p4d() for PGTABLE_LEVELS <=
 4

Commit-ID:  db516997a985b461f021d594e78155bbc7fc3e7e
Gitweb:     http://git.kernel.org/tip/db516997a985b461f021d594e78155bbc7fc3e7e
Author:     Tom Lendacky <thomas.lendacky@....com>
AuthorDate: Mon, 17 Jul 2017 16:10:31 -0500
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 18 Jul 2017 11:38:05 +0200

x86/mm: Create native_make_p4d() for PGTABLE_LEVELS <= 4

Currently, native_make_p4d() is only defined when CONFIG_PGTABLE_LEVELS
is greater than 4. Create a macro that will allow for defining and using
native_make_p4d() when CONFIG_PGTABLES_LEVELS is not greater than 4.

Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Alexander Potapenko <glider@...gle.com>
Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brijesh Singh <brijesh.singh@....com>
Cc: Dave Young <dyoung@...hat.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Cc: Jonathan Corbet <corbet@....net>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Larry Woodman <lwoodman@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Michael S. Tsirkin <mst@...hat.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Radim Krčmář <rkrcmar@...hat.com>
Cc: Rik van Riel <riel@...hat.com>
Cc: Toshimitsu Kani <toshi.kani@....com>
Cc: kasan-dev@...glegroups.com
Cc: kvm@...r.kernel.org
Cc: linux-arch@...r.kernel.org
Cc: linux-doc@...r.kernel.org
Cc: linux-efi@...r.kernel.org
Cc: linux-mm@...ck.org
Link: http://lkml.kernel.org/r/b645e14f9e73731023694494860ceab73feff777.1500319216.git.thomas.lendacky@amd.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/asm/pgtable_types.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 830992f..6c55973 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -309,6 +309,11 @@ static inline p4dval_t native_p4d_val(p4d_t p4d)
 #else
 #include <asm-generic/pgtable-nop4d.h>
 
+static inline p4d_t native_make_p4d(pudval_t val)
+{
+	return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
+}
+
 static inline p4dval_t native_p4d_val(p4d_t p4d)
 {
 	return native_pgd_val(p4d.pgd);