On Thu, Jan 16, 2020 at 9:47 AM Will Deacon [off-list ref] wrote:

On Fri, Dec 06, 2019 at 02:13:49PM -0800, Sami Tolvanen wrote:

quoted

Filter out CC_FLAGS_SCS for code that runs at a different exception
level.

Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <redacted>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
---
 arch/arm64/kvm/hyp/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile
index ea710f674cb6..17ea3da325e9 100644
--- a/arch/arm64/kvm/hyp/Makefile
+++ b/arch/arm64/kvm/hyp/Makefile

@@ -28,3 +28,6 @@ GCOV_PROFILE        := n
 KASAN_SANITIZE       := n
 UBSAN_SANITIZE       := n
 KCOV_INSTRUMENT      := n
+
+# remove the SCS flags from all objects in this directory
+KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))

Same comment as for the vDSO; can we remove the -ffixed-x18 as well?

Sure, I don't see why not. I'll change this in the next version.

Sami

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