ARM: 7609/1: disable errata work-arounds which access secure registers

In order to support secure and non-secure platforms in multi-platform
kernels, errata work-arounds that access secure only registers need to
be disabled. Make all the errata options that fit in this category
depend on !CONFIG_ARCH_MULTIPLATFORM.

This will effectively remove the errata options as platforms are
converted over to multi-platform.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f95ba14..432921e 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1230,6 +1230,7 @@ config ARM_ERRATA_430973
 config ARM_ERRATA_458693
        bool "ARM errata: Processor deadlock when a false hazard is created"
        depends on CPU_V7
+       depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 458693 Cortex-A8 (r2p0)
          erratum. For very specific sequences of memory operations, it is
@@ -1243,6 +1244,7 @@ config ARM_ERRATA_458693
 config ARM_ERRATA_460075
        bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
        depends on CPU_V7
+       depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 460075 Cortex-A8 (r2p0)
          erratum. Any asynchronous access to the L2 cache may encounter a
@@ -1255,6 +1257,7 @@ config ARM_ERRATA_460075
 config ARM_ERRATA_742230
        bool "ARM errata: DMB operation may be faulty"
        depends on CPU_V7 && SMP
+       depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 742230 Cortex-A9
          (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
@@ -1267,6 +1270,7 @@ config ARM_ERRATA_742230
 config ARM_ERRATA_742231
        bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
        depends on CPU_V7 && SMP
+       depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 742231 Cortex-A9
          (r2p0..r2p2) erratum. Under certain conditions, specific to the
@@ -1317,6 +1321,7 @@ config PL310_ERRATA_727915
 config ARM_ERRATA_743622
        bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
        depends on CPU_V7
+       depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 743622 Cortex-A9
          (r2p*) erratum. Under very rare conditions, a faulty
@@ -1330,6 +1335,7 @@ config ARM_ERRATA_743622
 config ARM_ERRATA_751472
        bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
        depends on CPU_V7
+       depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 751472 Cortex-A9 (prior
          to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the

diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index 99e63f5..52d315b 100644 (file)
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -42,7 +42,6 @@ config ARCH_VEXPRESS_CORTEX_A5_A9_ERRATA
        bool "Enable A5 and A9 only errata work-arounds"
        default y
        select ARM_ERRATA_720789
-       select ARM_ERRATA_751472
        select PL310_ERRATA_753970 if CACHE_PL310
        help
          Provides common dependencies for Versatile Express platforms

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 350f6a7..26a6205 100644 (file)
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -245,7 +245,8 @@ __v7_setup:
        ldr     r10, =0x00000c08                @ Cortex-A8 primary part number
        teq     r0, r10
        bne     2f
-#ifdef CONFIG_ARM_ERRATA_430973
+#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
+
        teq     r5, #0x00100000                 @ only present in r1p*
        mrceq   p15, 0, r10, c1, c0, 1          @ read aux control register
        orreq   r10, r10, #(1 << 6)             @ set IBE to 1