blob: 8b89be1a81415e2743a3665b23d56066e919e105 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
id = 584
title = "qemu-system-ppc: extra IPI interrupt on core0"
state = "closed"
created_at = "2021-08-31T05:43:03.509Z"
closed_at = "2021-09-30T16:38:03.120Z"
labels = ["target: ppc"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/584"
host-os = "Linux"
host-arch = "x86_64"
qemu-version = "QEMU emulator version 6.1.0"
guest-os = "vxWroks/linux"
guest-arch = "PowerPC"
description = """When I try to emit an IPI interrupt from core0 to another core via the MPIC controller(IPIDR1—Interprocessor interrupt dispatch register 1), core0 itself generates an unwanted IPI interrupt."""
reproduce = """1. Prepare ISR routine, something like:
void ipi_handler (void)
{
\tint core_id = CORE_ID_GET();
myprintf("\\n IPI interrupt triggered on core:%d\\n",core_id);
}
2. Create a task and bind it to core0. This task is mainly to write the MPIC controller to emit IPI interrupts to other cores.
MPIC_REG_WRITE(MPIC_BASE + IPIDR1, **0xe**);
3. run the test task"""
additional = """/* Below test was tested on Qemu6.1 */
IPI interrupts are emitted by core:0
**IPI interrupt triggered on core:0** /* it's a bug, it should not trigger on core 0. */
IPI interrupt triggered on core:1
IPI interrupt triggered on core:2
IPI interrupt triggered on core:3
This bug only occurs when "emitting an IPIDR1 interrupt from **core0**".
------------
/* Below test was tested on real board(fsl_p4080ds) */
IPI interrupts are emitted by core:0
IPI interrupt triggered on core:1
IPI interrupt triggered on core:2
IPI interrupt triggered on core:3"""
|