From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xen.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: [PATCH] Map Xen code/data/bss with superpages
Date: Wed, 24 Feb 2016 19:07:28 +0000 [thread overview]
Message-ID: <1456340856-3065-1-git-send-email-andrew.cooper3@citrix.com> (raw)
And make use of NX and RO attributes wherever possible.
After this series, the pagetable layout looks like:
(XEN) *** Dumping Xen text/data/bss mappings from ffff82d080000000
(XEN) l2_xenmap: ffff82d080814000, pa 00000000ac014000
(XEN) L4[261] = 00000000ac017063 X S RW P
(XEN) L3[322] = 00000000ac014063 X S RW P
(XEN) L2[000] = 00000000ab8001e1 X Gl + S RO P <- .text
(XEN) L2[001] = 00000000aba001a1 X Gl + S RO P <- .text
(XEN) L2[002] = 80000000abc001a1 NX Gl + S RO P <- .rodata
<- discarded .init
(XEN) L2[004] = 80000000ac0001e3 NX Gl + S RW P <- .data and .bss
(XEN) L2[511] = 000000084da6f063 X S RW P <- stubs
Andrew Cooper (8):
xen/lockprof: Move .lockprofile.data into .rodata
xen/x86: Improvements to build-time pagetable generation
xen/x86: Construct the {l2,l3}_bootmap at compile time
xen/memguard: Drop memguard_init() entirely
xen/x86: Disable CR0.WP while applying alternatives
xen/x86: Reorder .data and .init when linking
xen/x86: Use 2M superpages for text/data/bss mappings
xen/x86: Unilaterally remove .init mappings
xen/arch/arm/xen.lds.S | 15 ++++---
xen/arch/x86/alternative.c | 7 +++
xen/arch/x86/boot/head.S | 18 +++-----
xen/arch/x86/boot/x86_64.S | 44 +++++++++++++++---
xen/arch/x86/mm.c | 16 -------
xen/arch/x86/setup.c | 64 +++++++++++++++++++--------
xen/arch/x86/x86_64/mm.c | 4 --
xen/arch/x86/xen.lds.S | 103 ++++++++++++++++++++++++++++---------------
xen/include/asm-arm/config.h | 1 +
xen/include/asm-arm/mm.h | 1 -
xen/include/asm-x86/config.h | 1 +
xen/include/asm-x86/mm.h | 2 -
xen/include/asm-x86/setup.h | 5 +++
xen/include/xen/spinlock.h | 2 +-
14 files changed, 178 insertions(+), 105 deletions(-)
--
2.1.4
next reply other threads:[~2016-02-24 19:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-24 19:07 Andrew Cooper [this message]
2016-02-24 19:07 ` [PATCH] xen/lockprof: Move .lockprofile.data into .rodata Andrew Cooper
2016-02-25 11:02 ` Stefano Stabellini
2016-02-25 11:12 ` Stefano Stabellini
2016-02-24 19:07 ` [PATCH] xen/x86: Improvements to build-time pagetable generation Andrew Cooper
2016-02-24 19:07 ` [PATCH] xen/x86: Construct the {l2, l3}_bootmap at compile time Andrew Cooper
2016-02-24 19:07 ` [PATCH] xen/memguard: Drop memguard_init() entirely Andrew Cooper
2016-02-24 19:07 ` [PATCH] xen/x86: Disable CR0.WP while applying alternatives Andrew Cooper
2016-02-24 19:07 ` [PATCH] xen/x86: Reorder .data and .init when linking Andrew Cooper
2016-02-24 19:07 ` [PATCH] xen/x86: Use 2M superpages for text/data/bss mappings Andrew Cooper
2016-02-24 19:07 ` [PATCH] xen/x86: Unilaterally remove .init mappings Andrew Cooper
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