Le 16/04/2019 à 16:27, Mark Rutland a écrit :
On Tue, Apr 16, 2019 at 03:44:55PM +0200, Laurent Dufour wrote:
From: Mahendran Ganesh <opensource.ganesh@xxxxxxxxx>
Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT for arm64. This
enables Speculative Page Fault handler.
Signed-off-by: Ganesh Mahendran <opensource.ganesh@xxxxxxxxx>
This is missing your S-o-B.
You're right, I missed that...
The first patch noted that the ARCH_SUPPORTS_* option was there because
the arch code had to make an explicit call to try to handle the fault
speculatively, but that isn't addeed until patch 30.
Why is this separate from that code?
Andrew was recommended this a long time ago for bisection purpose. This
allows to build the code with CONFIG_SPECULATIVE_PAGE_FAULT before the
code that trigger the spf handler is added to the per architecture's code.
Thanks,
Laurent.
Thanks,
Mark.
---
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 870ef86a64ed..8e86934d598b 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -174,6 +174,7 @@ config ARM64
select SWIOTLB
select SYSCTL_EXCEPTION_TRACE
select THREAD_INFO_IN_TASK
+ select ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
help
ARM 64-bit (AArch64) Linux support.
--
2.21.0
