linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Andy Lutomirski <luto@amacapital.net>,
	linux-arch@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH 1/8] x86/dump_pagetables: Generalize address normalization
Date: Mon, 17 Jul 2017 01:59:47 +0300	[thread overview]
Message-ID: <20170716225954.74185-2-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20170716225954.74185-1-kirill.shutemov@linux.intel.com>

Modify normalize_addr to handle different sizes of virtual address
space.

It's preparation for enabling 5-level paging.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 arch/x86/mm/dump_pagetables.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index 0470826d2bdc..a824d575bb84 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -188,11 +188,12 @@ static void printk_prot(struct seq_file *m, pgprot_t prot, int level, bool dmsg)
  */
 static unsigned long normalize_addr(unsigned long u)
 {
-#ifdef CONFIG_X86_64
-	return (signed long)(u << 16) >> 16;
-#else
-	return u;
-#endif
+	int shift;
+	if (!IS_ENABLED(CONFIG_X86_64))
+		return u;
+
+	shift = 64 - (__VIRTUAL_MASK_SHIFT + 1);
+	return (signed long)(u << shift) >> shift;
 }
 
 /*
-- 
2.11.0

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

  reply	other threads:[~2017-07-16 23:00 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-16 22:59 [PATCH 0/8] 5-level paging enabling for v4.14 Kirill A. Shutemov
2017-07-16 22:59 ` Kirill A. Shutemov [this message]
2017-07-16 22:59 ` [PATCH 2/8] x86/dump_pagetables: Fix printout of p4d level Kirill A. Shutemov
2017-07-16 22:59 ` [PATCH 3/8] x86/xen: Redefine XEN_ELFNOTE_INIT_P2M using PUD_SIZE * PTRS_PER_PUD Kirill A. Shutemov
2017-07-17  5:45   ` Juergen Gross
2017-07-16 22:59 ` [PATCH 4/8] x86/mm: Rename tasksize_32bit/64bit to task_size_32bit/64bit Kirill A. Shutemov
2017-07-16 22:59 ` [PATCH 5/8] x86/mpx: Do not allow MPX if we have mappings above 47-bit Kirill A. Shutemov
2017-07-16 22:59 ` [PATCH 6/8] x86/mm: Prepare to expose larger address space to userspace Kirill A. Shutemov
2017-07-16 22:59 ` [PATCH 7/8] x86/mm: Allow userspace have mapping above 47-bit Kirill A. Shutemov
2017-07-16 22:59 ` [PATCH 8/8] x86: Enable 5-level paging support Kirill A. Shutemov
2017-07-20  7:57 ` [PATCH 0/8] 5-level paging enabling for v4.14 Kirill A. Shutemov

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170716225954.74185-2-kirill.shutemov@linux.intel.com \
    --to=kirill.shutemov@linux.intel.com \
    --cc=ak@linux.intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=dave.hansen@intel.com \
    --cc=hpa@zytor.com \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=luto@amacapital.net \
    --cc=mingo@redhat.com \
    --cc=tglx@linutronix.de \
    --cc=torvalds@linux-foundation.org \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).