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[Qemu-devel] [Bug 1838277] Re: qemu-system-aarch64: regression in 3.1: b
From: |
Thomas Huth |
Subject: |
[Qemu-devel] [Bug 1838277] Re: qemu-system-aarch64: regression in 3.1: breakpoint instructions always routed to EL_D even when current EL is higher |
Date: |
Fri, 16 Aug 2019 04:46:09 -0000 |
Fix included here:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=987a23224218fa3bb
** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1838277
Title:
qemu-system-aarch64: regression in 3.1: breakpoint instructions always
routed to EL_D even when current EL is higher
Status in QEMU:
Fix Released
Bug description:
Affects 3.1.0 (latest stable release) and latest commit
(893dc8300c80e3dc32f31e968cf7aa0904da50c3) but did *not* affect 2.11
(qemu from bionic ubuntu LTS).
With the following code and shell commands:
test.s:
.text
mov x0, #0x60000000
msr vbar_el2, x0
dsb sy
isb sy
$ aarch64-none-elf-as test.s -o test.o
$ aarch64-none-elf-objcopy -S -O binary test.o test.bin
$ qemu-system-aarch64 -nographic -machine virt,virtualization=on -cpu
cortex-a57 -kernel test.bin -s -S
vbar_el2 is still 0 after the code, instead of being the expected
0x60000000. (see screenshot).
This regression doesn't seem to happen for vbar_el1 &
virtualization=off.
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