| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1429648971-18007-1-git-send-email-mcgrof@do-not-panic.com>
Date: Tue, 21 Apr 2015 13:42:51 -0700
From: "Luis R. Rodriguez" <mcgrof@...not-panic.com>
To: mingo@...e.hu, tglx@...utronix.de, hpa@...or.com,
plagnioj@...osoft.com, tomi.valkeinen@...com
Cc: linux-fbdev@...r.kernel.org, luto@...capital.net, mst@...hat.com,
cocci@...teme.lip6.fr, "Luis R. Rodriguez" <mcgrof@...e.com>,
Toshi Kani <toshi.kani@...com>, Ingo Molnar <mingo@...hat.com>,
Will Deacon <will.deacon@....com>,
Thierry Reding <treding@...dia.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Catalin Marinas <catalin.marinas@....com>,
Abhilash Kesavan <a.kesavan@...sung.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Cristian Stoica <cristian.stoica@...escale.com>,
dri-devel@...ts.freedesktop.org,
Suresh Siddha <sbsiddha@...il.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Juergen Gross <jgross@...e.com>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Dave Airlie <airlied@...hat.com>,
Antonino Daplas <adaplas@...il.com>,
Ville Syrjälä <syrjala@....fi>,
Mel Gorman <mgorman@...e.de>, Vlastimil Babka <vbabka@...e.cz>,
Borislav Petkov <bp@...e.de>, Davidlohr Bueso <dbueso@...e.de>,
x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3] mtrr: avoid ifdef'ery with phys_wc_to_mtrr_index()
From: "Luis R. Rodriguez" <mcgrof@...e.com>
There is only one user but since we're going to bury
MTRR next out of access to drivers expose this last
piece of API to drivers in a general fashion only
needing io.h for access to helpers.
Cc: Toshi Kani <toshi.kani@...com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Will Deacon <will.deacon@....com>
Cc: Thierry Reding <treding@...dia.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Abhilash Kesavan <a.kesavan@...sung.com>
Cc: Matthias Brugger <matthias.bgg@...il.com>
Cc: Cristian Stoica <cristian.stoica@...escale.com>
Cc: dri-devel@...ts.freedesktop.org
Cc: Suresh Siddha <sbsiddha@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Juergen Gross <jgross@...e.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Dave Airlie <airlied@...hat.com>
Cc: Antonino Daplas <adaplas@...il.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@...com>
Cc: Ville Syrjälä <syrjala@....fi>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Borislav Petkov <bp@...e.de>
Cc: Davidlohr Bueso <dbueso@...e.de>
Cc: x86@...nel.org
Cc: linux-fbdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
---
arch/x86/include/asm/io.h | 3 +++
arch/x86/include/asm/mtrr.h | 5 -----
arch/x86/kernel/cpu/mtrr/main.c | 6 +++---
drivers/gpu/drm/drm_ioctl.c | 14 +-------------
include/linux/io.h | 6 ++++++
5 files changed, 13 insertions(+), 21 deletions(-)
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 4afc05f..a2b9740 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -339,6 +339,9 @@ extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
#define IO_SPACE_LIMIT 0xffff
#ifdef CONFIG_MTRR
+extern int __must_check arch_phys_wc_index(int handle);
+#define arch_phys_wc_index arch_phys_wc_index
+
extern int __must_check arch_phys_wc_add(unsigned long base,
unsigned long size);
extern void arch_phys_wc_del(int handle);
diff --git a/arch/x86/include/asm/mtrr.h b/arch/x86/include/asm/mtrr.h
index da8dff1..27e3dc0 100644
--- a/arch/x86/include/asm/mtrr.h
+++ b/arch/x86/include/asm/mtrr.h
@@ -48,7 +48,6 @@ extern void mtrr_aps_init(void);
extern void mtrr_bp_restore(void);
extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
extern int amd_special_default_mtrr(void);
-extern int phys_wc_to_mtrr_index(int handle);
# else
static inline u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform)
{
@@ -85,10 +84,6 @@ static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
{
}
-static inline int phys_wc_to_mtrr_index(int handle)
-{
- return -1;
-}
#define mtrr_ap_init() do {} while (0)
#define mtrr_bp_init() do {} while (0)
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 12abdbe..d8c106c 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -580,7 +580,7 @@ void arch_phys_wc_del(int handle)
EXPORT_SYMBOL(arch_phys_wc_del);
/*
- * phys_wc_to_mtrr_index - translates arch_phys_wc_add's return value
+ * arch_phys_wc_index - translates arch_phys_wc_add's return value
* @handle: Return value from arch_phys_wc_add
*
* This will turn the return value from arch_phys_wc_add into an mtrr
@@ -590,14 +590,14 @@ EXPORT_SYMBOL(arch_phys_wc_del);
* in printk line. Alas there is an illegitimate use in some ancient
* drm ioctls.
*/
-int phys_wc_to_mtrr_index(int handle)
+int arch_phys_wc_index(int handle)
{
if (handle < MTRR_TO_PHYS_WC_OFFSET)
return -1;
else
return handle - MTRR_TO_PHYS_WC_OFFSET;
}
-EXPORT_SYMBOL_GPL(phys_wc_to_mtrr_index);
+EXPORT_SYMBOL_GPL(arch_phys_wc_index);
/*
* HACK ALERT!
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 266dcd6..0a95782 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -36,9 +36,6 @@
#include <linux/pci.h>
#include <linux/export.h>
-#ifdef CONFIG_X86
-#include <asm/mtrr.h>
-#endif
static int drm_version(struct drm_device *dev, void *data,
struct drm_file *file_priv);
@@ -197,16 +194,7 @@ static int drm_getmap(struct drm_device *dev, void *data,
map->type = r_list->map->type;
map->flags = r_list->map->flags;
map->handle = (void *)(unsigned long) r_list->user_token;
-
-#ifdef CONFIG_X86
- /*
- * There appears to be exactly one user of the mtrr index: dritest.
- * It's easy enough to keep it working on non-PAT systems.
- */
- map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
-#else
- map->mtrr = -1;
-#endif
+ map->mtrr = arch_phys_wc_index(r_list->map->mtrr);
mutex_unlock(&dev->struct_mutex);
diff --git a/include/linux/io.h b/include/linux/io.h
index 986f2bf..6e29acf 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -111,6 +111,12 @@ static inline void arch_phys_wc_del(int handle)
}
#define arch_phys_wc_add arch_phys_wc_add
+#ifndef arch_phys_wc_index
+static inline int arch_phys_wc_index(int handle)
+{
+ return -1;
+}
+#define arch_phys_wc_index arch_phys_wc_index
#endif
#endif /* _LINUX_IO_H */
--
2.3.2.209.gd67f9d5.dirty
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists