diff mbox series

[RFC,25/47] mm: asi: Avoid warning from NMI userspace accesses in ASI context

Message ID 20220223052223.1202152-26-junaids@google.com (mailing list archive)
State New
Headers show
Series Address Space Isolation for KVM | expand

Commit Message

Junaid Shahid Feb. 23, 2022, 5:22 a.m. UTC 
nmi_uaccess_okay() emits a warning if current CR3 != mm->pgd.
Limit the warning to only when ASI is not active.

Signed-off-by: Junaid Shahid <junaids@google.com>


---
 arch/x86/mm/tlb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 25bee959d1d3..628f1cd904ac 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -1292,7 +1292,8 @@  bool nmi_uaccess_okay(void)
 	if (loaded_mm != current_mm)
 		return false;
 
-	VM_WARN_ON_ONCE(current_mm->pgd != __va(read_cr3_pa()));
+	VM_WARN_ON_ONCE(current_mm->pgd != __va(read_cr3_pa()) &&
+			!is_asi_active());
 
 	return true;
 }