@@ -101,6 +101,9 @@ extern char __hyp_text_end[];
#define HVC_GET_VECTORS 0
#define HVC_SET_VECTORS 1
#define HVC_SOFT_RESTART 2
+#define HVC_RESET_VECTORS 3
+
+#define HVC_STUB_HCALL_NR 4
#endif /* __ASSEMBLY__ */
@@ -216,7 +216,10 @@ __hyp_stub_do_trap:
bne 1f
bx r1
-1: mov r0, #-1
+1: teq r0, #HVC_RESET_VECTORS
+ beq __hyp_stub_exit
+
+ mov r0, #-1
__hyp_stub_exit:
__ERET
@@ -264,6 +267,12 @@ ENTRY(__hyp_soft_restart)
ret lr
ENDPROC(__hyp_soft_restart)
+ENTRY(__hyp_reset_vectors)
+ mov r0, #HVC_RESET_VECTORS
+ __HVC(0)
+ ret lr
+ENDPROC(__hyp_reset_vectors)
+
#ifndef ZIMAGE
.align 2
.L__boot_cpu_mode_offset:
Let's define a new stub hypercall that resets the HYP configuration to its default: hyp-stub vectors, and MMU disabled. Of course, for the hyp-stub itself, this is a trivial no-op. Hypervisors will have a bit more work to do. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm/include/asm/virt.h | 3 +++ arch/arm/kernel/hyp-stub.S | 11 ++++++++++- 2 files changed, 13 insertions(+), 1 deletion(-)