arm64: Silence gcc warnings about arch ABI drift

[linux.git] / arch / arm64 / Kconfig

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 69a59a5d1143b3f67695a62f53f4e1d295f721f0..f6275c265d41642d05d34f9f966e18de01b50ebd 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -475,16 +475,15 @@ config ARM64_ERRATUM_1024718
 
          If unsure, say Y.
 
-config ARM64_ERRATUM_1188873
+config ARM64_ERRATUM_1418040
        bool "Cortex-A76/Neoverse-N1: MRC read following MRRC read of specific Generic Timer in AArch32 might give incorrect result"
        default y
        depends on COMPAT
-       select ARM_ARCH_TIMER_OOL_WORKAROUND
        help
          This option adds a workaround for ARM Cortex-A76/Neoverse-N1
-         erratum 1188873.
+         errata 1188873 and 1418040.
 
-         Affected Cortex-A76/Neoverse-N1 cores (r0p0, r1p0, r2p0) could
+         Affected Cortex-A76/Neoverse-N1 cores (r0p0 to r3p1) could
          cause register corruption when accessing the timer registers
          from AArch32 userspace.
 
@@ -520,6 +519,24 @@ config ARM64_ERRATUM_1286807
 
          If unsure, say Y.
 
+config ARM64_ERRATUM_1463225
+       bool "Cortex-A76: Software Step might prevent interrupt recognition"
+       default y
+       help
+         This option adds a workaround for Arm Cortex-A76 erratum 1463225.
+
+         On the affected Cortex-A76 cores (r0p0 to r3p1), software stepping
+         of a system call instruction (SVC) can prevent recognition of
+         subsequent interrupts when software stepping is disabled in the
+         exception handler of the system call and either kernel debugging
+         is enabled or VHE is in use.
+
+         Work around the erratum by triggering a dummy step exception
+         when handling a system call from a task that is being stepped
+         in a VHE configuration of the kernel.
+
+         If unsure, say Y.
+
 config CAVIUM_ERRATUM_22375
        bool "Cavium erratum 22375, 24313"
        default y
@@ -1341,6 +1358,7 @@ menu "ARMv8.3 architectural features"
 config ARM64_PTR_AUTH
        bool "Enable support for pointer authentication"
        default y
+       depends on !KVM || ARM64_VHE
        help
          Pointer authentication (part of the ARMv8.3 Extensions) provides
          instructions for signing and authenticating pointers against secret
@@ -1354,8 +1372,9 @@ config ARM64_PTR_AUTH
          context-switched along with the process.
 
          The feature is detected at runtime. If the feature is not present in
-         hardware it will not be advertised to userspace nor will it be
-         enabled.
+         hardware it will not be advertised to userspace/KVM guest nor will it
+         be enabled. However, KVM guest also require VHE mode and hence
+         CONFIG_ARM64_VHE=y option to use this feature.
 
 endmenu
 
@@ -1403,6 +1422,7 @@ config ARM64_MODULE_PLTS
 
 config ARM64_PSEUDO_NMI
        bool "Support for NMI-like interrupts"
+       depends on BROKEN # 1556553607-46531-1-git-send-email-julien.thierry@arm.com
        select CONFIG_ARM_GIC_V3
        help
          Adds support for mimicking Non-Maskable Interrupts through the use of