diff mbox series

[kvm-unit-tests,v5,22/29] powerpc: Fix emulator illegal instruction test for powernv

Message ID 20231216134257.1743345-23-npiggin@gmail.com (mailing list archive)
State New, archived
Headers show
Series powerpc: updates, P10, PNV support | expand

Commit Message

Nicholas Piggin Dec. 16, 2023, 1:42 p.m. UTC 
Illegal instructions cause 0xe40 (HEAI) interrupts rather
than program interrupts.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 powerpc/emulator.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

Comments

Thomas Huth Dec. 19, 2023, 12:39 p.m. UTC | #1 
On 16/12/2023 14.42, Nicholas Piggin wrote:
> Illegal instructions cause 0xe40 (HEAI) interrupts rather
> than program interrupts.
> 
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
>   powerpc/emulator.c | 19 ++++++++++++++++++-
>   1 file changed, 18 insertions(+), 1 deletion(-)

Acked-by: Thomas Huth <thuth@redhat.com>
diff mbox series

Patch

diff --git a/powerpc/emulator.c b/powerpc/emulator.c
index 39dd5964..035a903c 100644
--- a/powerpc/emulator.c
+++ b/powerpc/emulator.c
@@ -31,6 +31,20 @@  static void program_check_handler(struct pt_regs *regs, void *opaque)
 	regs->nip += 4;
 }
 
+static void heai_handler(struct pt_regs *regs, void *opaque)
+{
+	int *data = opaque;
+
+	if (verbose) {
+		printf("Detected invalid instruction %#018lx: %08x\n",
+		       regs->nip, *(uint32_t*)regs->nip);
+	}
+
+	*data = 8; /* Illegal instruction */
+
+	regs->nip += 4;
+}
+
 static void alignment_handler(struct pt_regs *regs, void *opaque)
 {
 	int *data = opaque;
@@ -362,7 +376,10 @@  int main(int argc, char **argv)
 {
 	int i;
 
-	handle_exception(0x700, program_check_handler, (void *)&is_invalid);
+	if (machine_is_powernv())
+		handle_exception(0xe40, heai_handler, (void *)&is_invalid);
+	else
+		handle_exception(0x700, program_check_handler, (void *)&is_invalid);
 	handle_exception(0x600, alignment_handler, (void *)&alignment);
 
 	for (i = 1; i < argc; i++) {