arm64: Kconfig: Make ARM64_PSEUDO_NMI depend on BROKEN for now [Linux 5.2]

arm64: Kconfig: Make ARM64_PSEUDO_NMI depend on BROKEN for now [Linux 5.2]

This Linux kernel change "arm64: Kconfig: Make ARM64_PSEUDO_NMI depend on BROKEN for now" is included in the Linux 5.2 release. This change is authored by Will Deacon <will.deacon [at] arm.com> on Fri May 24 14:15:34 2019 +0100. The commit for this change in Linux stable tree is 96a13f5 (patch).

arm64: Kconfig: Make ARM64_PSEUDO_NMI depend on BROKEN for now

Although we merged support for pseudo-nmi using interrupt priority
masking in 5.1, we've since uncovered a number of non-trivial issues
with the implementation. Although there are patches pending to address
these problems, we're facing issues that prevent us from merging them at
this current time:

  https://lkml.kernel.org/r/1556553607-46531-1-git-send-email-julien.thierry@arm.com

For now, simply mark this optional feature as BROKEN in the hope that we
can fix things properly in the near future.

Cc: <stable@vger.kernel.org> # 5.1
Cc: Julien Thierry <julien.thierry@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

There is one line of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.

 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6a95446..f6275c2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1422,6 +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

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