For the same reason as with PTI, ASI means kernel pages can't be global:
TLB entries from the unrestricted address space must not carry over into
the restricted address space.

Signed-off-by: Brendan Jackman <jackmanb@google.com>
---
 arch/x86/mm/init.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 8fd34475af7ccd49d0124e13a87342d3bfef3e05..45bbe764ca4e0abc13d41590dc4ff466180cca31 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -249,8 +249,9 @@ static void __init probe_page_size_mask(void)
 
 	/* By the default is everything supported: */
 	__default_kernel_pte_mask = __supported_pte_mask;
-	/* Except when with PTI where the kernel is mostly non-Global: */
-	if (cpu_feature_enabled(X86_FEATURE_PTI))
+	/* Except when with PTI/ASI where the kernel is mostly non-Global: */
+	if (cpu_feature_enabled(X86_FEATURE_PTI) ||
+	    cpu_feature_enabled(X86_FEATURE_ASI))
 		__default_kernel_pte_mask &= ~_PAGE_GLOBAL;
 
 	/* Enable 1 GB linear kernel mappings if available: */

-- 
2.50.1