Apply variant 4 mitigation for Neoverse N1
This patch applies the new MSR instruction to directly set the
PSTATE.SSBS bit which controls speculative loads. This new instruction
is available at Neoverse N1 core so it's utilised.
Change-Id: Iee18a8b042c90fdb72d2b98f364dcfbb17510728
Signed-off-by: John Tsichritzis <john.tsichritzis@arm.com>
diff --git a/lib/cpus/aarch64/neoverse_n1.S b/lib/cpus/aarch64/neoverse_n1.S
index c6a5c08..060c625 100644
--- a/lib/cpus/aarch64/neoverse_n1.S
+++ b/lib/cpus/aarch64/neoverse_n1.S
@@ -46,6 +46,10 @@
func neoverse_n1_reset_func
mov x19, x30
+
+ /* Disables speculative loads */
+ msr SSBS, xzr
+
bl cpu_get_rev_var
mov x18, x0