enable padlock on x86_64

enable padlock on x86_64

[Sebastian Andrzej Siewior]

To enable the padlock unit, two msr bits have to flipped. This is allready
done in the 32bit path and is missing in the other. Instead of copy paste
the code, I merged the 64bit part into the 32bit part. The things that
changed during the merge:
- the fixups from x86_64 (family 6, model >= 15) were not present in 32bit
  path but are now. They might be usefull if this CPU is booted in 32bit
  mode.
- the fixups which are executed via ->c_early_init() are now executed
  again via ->c_init(). This was done in the 64bit path and without this I
  lost the constant_tsc flag. However, tsc is not useable due to
| [    2.023006] Marking TSC unstable due to TSC halts in idle
| [    2.500082] Clocksource tsc unstable (delta = -326436711 ns)

The two patches are against the current tip tree. A version of patch 1
against current -rc8 is available at [0].

[0] http://download.breakpoint.cc/0001-x86-centaur-merge-32-64-bit-version.patch

Sebastian

Re: enable padlock on x86_64

[Ingo Molnar]

* Sebastian Andrzej Siewior <sebastian@breakpoint.cc> wrote:

> To enable the padlock unit, two msr bits have to flipped. This is allready
> done in the 32bit path and is missing in the other. Instead of copy paste
> the code, I merged the 64bit part into the 32bit part. The things that
> changed during the merge:
> - the fixups from x86_64 (family 6, model >= 15) were not present in 32bit
>   path but are now. They might be usefull if this CPU is booted in 32bit
>   mode.
> - the fixups which are executed via ->c_early_init() are now executed
>   again via ->c_init(). This was done in the 64bit path and without this I
>   lost the constant_tsc flag. However, tsc is not useable due to
> | [    2.023006] Marking TSC unstable due to TSC halts in idle
> | [    2.500082] Clocksource tsc unstable (delta = -326436711 ns)
> 
> The two patches are against the current tip tree. A version of 
> patch 1 against current -rc8 is available at [0].

thanks, looks good. We can apply #1 to -tip just fine - but a 
drivers/crypto/ change should go via the crypto tree. Can the 
crypto tree apply #2 without having #1 right away? [i.e. will it 
still build and boot fine - even though the padlock 
functionality might not be fully present on 32-bit? ]

Then in 2.6.30 once both the x86 tree and the crypto tree are 
merged we'll have both changes combined.

Does that sound good?

	Ingo

Re: enable padlock on x86_64

[Sebastian Andrzej Siewior]

* Ingo Molnar | 2009-03-14 12:47:32 [+0100]:

>thanks, looks good. We can apply #1 to -tip just fine - but a 
>drivers/crypto/ change should go via the crypto tree. Can the 
>crypto tree apply #2 without having #1 right away? [i.e. will it 
>still build and boot fine - even though the padlock 
>functionality might not be fully present on 32-bit? ]

Yep, it is fine.
#1 in, #2 not will not result in any difference to what we have now.
#2 in, #1 not will result in "padlock not detected" while loading the
module and -ENODEV.

>Then in 2.6.30 once both the x86 tree and the crypto tree are 
>merged we'll have both changes combined.
>
>Does that sound good?
I'm fine with this, but last word is Herbert's :)

>	Ingo

Sebastian

Re: enable padlock on x86_64

[Herbert Xu]

On Sat, Mar 14, 2009 at 12:53:07PM +0100, Sebastian Andrzej Siewior wrote:
> 
> Yep, it is fine.
> #1 in, #2 not will not result in any difference to what we have now.
> #2 in, #1 not will result in "padlock not detected" while loading the
> module and -ENODEV.

Let's merge #1 right now and I'll pick up #2 once #1 shows up
in linux-net.

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Re: enable padlock on x86_64

[Chuck Ebbert]

On Sat, 14 Mar 2009 21:24:20 +0800
Herbert Xu <herbert@gondor.apana.org.au> wrote:

> On Sat, Mar 14, 2009 at 12:53:07PM +0100, Sebastian Andrzej Siewior wrote:
> > 
> > Yep, it is fine.
> > #1 in, #2 not will not result in any difference to what we have now.
> > #2 in, #1 not will result in "padlock not detected" while loading the
> > module and -ENODEV.
> 
> Let's merge #1 right now and I'll pick up #2 once #1 shows up
> in linux-net.
> 

#1 is in 2.6.30-rc now but I don't see #2 pending anywhere.

Re: enable padlock on x86_64

[Herbert Xu]

On Mon, Apr 20, 2009 at 06:09:31PM -0400, Chuck Ebbert wrote:
>
> #1 is in 2.6.30-rc now but I don't see #2 pending anywhere.

Thanks for the reminder.  I've now added it to cryptodev.
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

[PATCH 1/2] x86/centaur: merge 32 & 64 bit version

[Sebastian Andrzej Siewior]

there should be no difference, except
* the 64bit variant now also initializes the padlock unit.
* ->c_early_init() is executed again from ->c_init()
* the 64bit fixups made into 32bit path.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
---
 arch/x86/Kconfig.cpu             |   17 +----------------
 arch/x86/kernel/cpu/Makefile     |    3 +--
 arch/x86/kernel/cpu/centaur.c    |   30 +++++++++++++++++++++++++-----
 arch/x86/kernel/cpu/centaur_64.c |   37 -------------------------------------
 4 files changed, 27 insertions(+), 60 deletions(-)
 delete mode 100644 arch/x86/kernel/cpu/centaur_64.c

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index a95eaf0..924e156 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -456,24 +456,9 @@ config CPU_SUP_AMD
 
 	  If unsure, say N.
 
-config CPU_SUP_CENTAUR_32
+config CPU_SUP_CENTAUR
 	default y
 	bool "Support Centaur processors" if PROCESSOR_SELECT
-	depends on !64BIT
-	---help---
-	  This enables detection, tunings and quirks for Centaur processors
-
-	  You need this enabled if you want your kernel to run on a
-	  Centaur CPU. Disabling this option on other types of CPUs
-	  makes the kernel a tiny bit smaller. Disabling it on a Centaur
-	  CPU might render the kernel unbootable.
-
-	  If unsure, say N.
-
-config CPU_SUP_CENTAUR_64
-	default y
-	bool "Support Centaur processors" if PROCESSOR_SELECT
-	depends on 64BIT
 	---help---
 	  This enables detection, tunings and quirks for Centaur processors
 
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 24733b4..3efcb2b 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -19,8 +19,7 @@ obj-$(CONFIG_X86_CPU_DEBUG)		+= cpu_debug.o
 obj-$(CONFIG_CPU_SUP_INTEL)		+= intel.o
 obj-$(CONFIG_CPU_SUP_AMD)		+= amd.o
 obj-$(CONFIG_CPU_SUP_CYRIX_32)		+= cyrix.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_32)	+= centaur.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_64)	+= centaur_64.o
+obj-$(CONFIG_CPU_SUP_CENTAUR)		+= centaur.o
 obj-$(CONFIG_CPU_SUP_TRANSMETA_32)	+= transmeta.o
 obj-$(CONFIG_CPU_SUP_UMC_32)		+= umc.o
 
diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 983e083..946814a 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -276,7 +276,7 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
 		 */
 		c->x86_capability[5] = cpuid_edx(0xC0000001);
 	}
-
+#ifdef CONFIG_X86_32
 	/* Cyrix III family needs CX8 & PGE explicitly enabled. */
 	if (c->x86_model >= 6 && c->x86_model <= 9) {
 		rdmsr(MSR_VIA_FCR, lo, hi);
@@ -288,6 +288,11 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
 	/* Before Nehemiah, the C3's had 3dNOW! */
 	if (c->x86_model >= 6 && c->x86_model < 9)
 		set_cpu_cap(c, X86_FEATURE_3DNOW);
+#endif
+	if (c->x86 == 0x6 && c->x86_model >= 0xf) {
+		c->x86_cache_alignment = c->x86_clflush_size * 2;
+		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+	}
 
 	display_cacheinfo(c);
 }
@@ -316,16 +321,25 @@ enum {
 static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
 {
 	switch (c->x86) {
+#ifdef CONFIG_X86_32
 	case 5:
 		/* Emulate MTRRs using Centaur's MCR. */
 		set_cpu_cap(c, X86_FEATURE_CENTAUR_MCR);
 		break;
+#endif
+	case 6:
+		if (c->x86_model >= 0xf)
+			set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+		break;
 	}
+#ifdef CONFIG_X86_64
+	set_cpu_cap(c, X86_FEATURE_SYSENTER32);
+#endif
 }
 
 static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 {
-
+#ifdef CONFIG_X86_32
 	char *name;
 	u32  fcr_set = 0;
 	u32  fcr_clr = 0;
@@ -337,8 +351,10 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 	 * 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway
 	 */
 	clear_cpu_cap(c, 0*32+31);
-
+#endif
+	early_init_centaur(c);
 	switch (c->x86) {
+#ifdef CONFIG_X86_32
 	case 5:
 		switch (c->x86_model) {
 		case 4:
@@ -442,16 +458,20 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 		}
 		sprintf(c->x86_model_id, "WinChip %s", name);
 		break;
-
+#endif
 	case 6:
 		init_c3(c);
 		break;
 	}
+#ifdef CONFIG_X86_64
+	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+#endif
 }
 
 static unsigned int __cpuinit
 centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
 {
+#ifdef CONFIG_X86_32
 	/* VIA C3 CPUs (670-68F) need further shifting. */
 	if ((c->x86 == 6) && ((c->x86_model == 7) || (c->x86_model == 8)))
 		size >>= 8;
@@ -464,7 +484,7 @@ centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
 	if ((c->x86 == 6) && (c->x86_model == 9) &&
 				(c->x86_mask == 1) && (size == 65))
 		size -= 1;
-
+#endif
 	return size;
 }
 
diff --git a/arch/x86/kernel/cpu/centaur_64.c b/arch/x86/kernel/cpu/centaur_64.c
deleted file mode 100644
index 51b09c4..0000000
--- a/arch/x86/kernel/cpu/centaur_64.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include <linux/init.h>
-#include <linux/smp.h>
-
-#include <asm/cpufeature.h>
-#include <asm/processor.h>
-
-#include "cpu.h"
-
-static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
-{
-	if (c->x86 == 0x6 && c->x86_model >= 0xf)
-		set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
-
-	set_cpu_cap(c, X86_FEATURE_SYSENTER32);
-}
-
-static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
-{
-	early_init_centaur(c);
-
-	if (c->x86 == 0x6 && c->x86_model >= 0xf) {
-		c->x86_cache_alignment = c->x86_clflush_size * 2;
-		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
-	}
-	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
-}
-
-static const struct cpu_dev centaur_cpu_dev __cpuinitconst = {
-	.c_vendor	= "Centaur",
-	.c_ident	= { "CentaurHauls" },
-	.c_early_init	= early_init_centaur,
-	.c_init		= init_centaur,
-	.c_x86_vendor	= X86_VENDOR_CENTAUR,
-};
-
-cpu_dev_register(centaur_cpu_dev);
-
-- 
1.6.2

[tip:x86/cpu] x86/centaur: merge 32 & 64 bit version

[Sebastian Andrzej Siewior]

Commit-ID:  48f4c485c275e9550fa1a1191768689cc3ae0037
Gitweb:     http://git.kernel.org/tip/48f4c485c275e9550fa1a1191768689cc3ae0037
Author:     Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
AuthorDate: Sat, 14 Mar 2009 12:24:02 +0100
Commit:     Ingo Molnar <mingo@elte.hu>
CommitDate: Sat, 14 Mar 2009 16:27:29 +0100

x86/centaur: merge 32 & 64 bit version

there should be no difference, except:

 * the 64bit variant now also initializes the padlock unit.
 * ->c_early_init() is executed again from ->c_init()
 * the 64bit fixups made into 32bit path.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: herbert@gondor.apana.org.au
LKML-Reference: <1237029843-28076-2-git-send-email-sebastian@breakpoint.cc>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
 arch/x86/Kconfig.cpu             |   17 +----------------
 arch/x86/kernel/cpu/Makefile     |    3 +--
 arch/x86/kernel/cpu/centaur.c    |   34 +++++++++++++++++++++++++++-------
 arch/x86/kernel/cpu/centaur_64.c |   37 -------------------------------------
 4 files changed, 29 insertions(+), 62 deletions(-)

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index a95eaf0..924e156 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -456,24 +456,9 @@ config CPU_SUP_AMD
 
 	  If unsure, say N.
 
-config CPU_SUP_CENTAUR_32
+config CPU_SUP_CENTAUR
 	default y
 	bool "Support Centaur processors" if PROCESSOR_SELECT
-	depends on !64BIT
-	---help---
-	  This enables detection, tunings and quirks for Centaur processors
-
-	  You need this enabled if you want your kernel to run on a
-	  Centaur CPU. Disabling this option on other types of CPUs
-	  makes the kernel a tiny bit smaller. Disabling it on a Centaur
-	  CPU might render the kernel unbootable.
-
-	  If unsure, say N.
-
-config CPU_SUP_CENTAUR_64
-	default y
-	bool "Support Centaur processors" if PROCESSOR_SELECT
-	depends on 64BIT
 	---help---
 	  This enables detection, tunings and quirks for Centaur processors
 
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index d4356f8..4e242f9 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -19,8 +19,7 @@ obj-$(CONFIG_X86_CPU_DEBUG)		+= cpu_debug.o
 obj-$(CONFIG_CPU_SUP_INTEL)		+= intel.o
 obj-$(CONFIG_CPU_SUP_AMD)		+= amd.o
 obj-$(CONFIG_CPU_SUP_CYRIX_32)		+= cyrix.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_32)	+= centaur.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_64)	+= centaur_64.o
+obj-$(CONFIG_CPU_SUP_CENTAUR)		+= centaur.o
 obj-$(CONFIG_CPU_SUP_TRANSMETA_32)	+= transmeta.o
 obj-$(CONFIG_CPU_SUP_UMC_32)		+= umc.o
 
diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 983e083..c95e831 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -1,11 +1,11 @@
+#include <linux/bitops.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/bitops.h>
 
 #include <asm/processor.h>
-#include <asm/msr.h>
 #include <asm/e820.h>
 #include <asm/mtrr.h>
+#include <asm/msr.h>
 
 #include "cpu.h"
 
@@ -276,7 +276,7 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
 		 */
 		c->x86_capability[5] = cpuid_edx(0xC0000001);
 	}
-
+#ifdef CONFIG_X86_32
 	/* Cyrix III family needs CX8 & PGE explicitly enabled. */
 	if (c->x86_model >= 6 && c->x86_model <= 9) {
 		rdmsr(MSR_VIA_FCR, lo, hi);
@@ -288,6 +288,11 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
 	/* Before Nehemiah, the C3's had 3dNOW! */
 	if (c->x86_model >= 6 && c->x86_model < 9)
 		set_cpu_cap(c, X86_FEATURE_3DNOW);
+#endif
+	if (c->x86 == 0x6 && c->x86_model >= 0xf) {
+		c->x86_cache_alignment = c->x86_clflush_size * 2;
+		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+	}
 
 	display_cacheinfo(c);
 }
@@ -316,16 +321,25 @@ enum {
 static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
 {
 	switch (c->x86) {
+#ifdef CONFIG_X86_32
 	case 5:
 		/* Emulate MTRRs using Centaur's MCR. */
 		set_cpu_cap(c, X86_FEATURE_CENTAUR_MCR);
 		break;
+#endif
+	case 6:
+		if (c->x86_model >= 0xf)
+			set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+		break;
 	}
+#ifdef CONFIG_X86_64
+	set_cpu_cap(c, X86_FEATURE_SYSENTER32);
+#endif
 }
 
 static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 {
-
+#ifdef CONFIG_X86_32
 	char *name;
 	u32  fcr_set = 0;
 	u32  fcr_clr = 0;
@@ -337,8 +351,10 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 	 * 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway
 	 */
 	clear_cpu_cap(c, 0*32+31);
-
+#endif
+	early_init_centaur(c);
 	switch (c->x86) {
+#ifdef CONFIG_X86_32
 	case 5:
 		switch (c->x86_model) {
 		case 4:
@@ -442,16 +458,20 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 		}
 		sprintf(c->x86_model_id, "WinChip %s", name);
 		break;
-
+#endif
 	case 6:
 		init_c3(c);
 		break;
 	}
+#ifdef CONFIG_X86_64
+	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+#endif
 }
 
 static unsigned int __cpuinit
 centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
 {
+#ifdef CONFIG_X86_32
 	/* VIA C3 CPUs (670-68F) need further shifting. */
 	if ((c->x86 == 6) && ((c->x86_model == 7) || (c->x86_model == 8)))
 		size >>= 8;
@@ -464,7 +484,7 @@ centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
 	if ((c->x86 == 6) && (c->x86_model == 9) &&
 				(c->x86_mask == 1) && (size == 65))
 		size -= 1;
-
+#endif
 	return size;
 }
 
diff --git a/arch/x86/kernel/cpu/centaur_64.c b/arch/x86/kernel/cpu/centaur_64.c
deleted file mode 100644
index 51b09c4..0000000
--- a/arch/x86/kernel/cpu/centaur_64.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include <linux/init.h>
-#include <linux/smp.h>
-
-#include <asm/cpufeature.h>
-#include <asm/processor.h>
-
-#include "cpu.h"
-
-static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
-{
-	if (c->x86 == 0x6 && c->x86_model >= 0xf)
-		set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
-
-	set_cpu_cap(c, X86_FEATURE_SYSENTER32);
-}
-
-static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
-{
-	early_init_centaur(c);
-
-	if (c->x86 == 0x6 && c->x86_model >= 0xf) {
-		c->x86_cache_alignment = c->x86_clflush_size * 2;
-		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
-	}
-	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
-}
-
-static const struct cpu_dev centaur_cpu_dev __cpuinitconst = {
-	.c_vendor	= "Centaur",
-	.c_ident	= { "CentaurHauls" },
-	.c_early_init	= early_init_centaur,
-	.c_init		= init_centaur,
-	.c_x86_vendor	= X86_VENDOR_CENTAUR,
-};
-
-cpu_dev_register(centaur_cpu_dev);
-

[PATCH 2/2] crypto/padlock: enable on x86_64

[Sebastian Andrzej Siewior]

almost everything stays the same, we need just to use the extended registers
on the bit variant.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
---
 drivers/crypto/Kconfig       |    2 +-
 drivers/crypto/padlock-aes.c |   13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index e522144..62ed61b 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -12,7 +12,7 @@ if CRYPTO_HW
 
 config CRYPTO_DEV_PADLOCK
 	tristate "Support for VIA PadLock ACE"
-	depends on X86_32 && !UML
+	depends on !UML
 	select CRYPTO_ALGAPI
 	help
 	  Some VIA processors come with an integrated crypto engine
diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index 3f0fdd1..ddd27c7 100644
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -154,7 +154,11 @@ static inline void padlock_reset_key(struct cword *cword)
 	int cpu = raw_smp_processor_id();
 
 	if (cword != per_cpu(last_cword, cpu))
+#ifndef CONFIG_X86_64
 		asm volatile ("pushfl; popfl");
+#else
+		asm volatile ("pushfq; popfq");
+#endif
 }
 
 static inline void padlock_store_cword(struct cword *cword)
@@ -208,10 +212,19 @@ static inline void padlock_xcrypt_ecb(const u8 *input, u8 *output, void *key,
 
 	asm volatile ("test $1, %%cl;"
 		      "je 1f;"
+#ifndef CONFIG_X86_64
 		      "lea -1(%%ecx), %%eax;"
 		      "mov $1, %%ecx;"
+#else
+		      "lea -1(%%rcx), %%rax;"
+		      "mov $1, %%rcx;"
+#endif
 		      ".byte 0xf3,0x0f,0xa7,0xc8;"	/* rep xcryptecb */
+#ifndef CONFIG_X86_64
 		      "mov %%eax, %%ecx;"
+#else
+		      "mov %%rax, %%rcx;"
+#endif
 		      "1:"
 		      ".byte 0xf3,0x0f,0xa7,0xc8"	/* rep xcryptecb */
 		      : "+S"(input), "+D"(output)
-- 
1.6.2