add new classifier result

1 files changed, 20 insertions, 0 deletions

diff --git a/results/classifier/105/boot/2585 b/results/classifier/105/boot/2585
new file mode 100644
index 00000000..69cc8eb7
--- /dev/null
+++ b/results/classifier/105/boot/2585
@@ -0,0 +1,20 @@
+boot: 0.828
+device: 0.822
+instruction: 0.819
+other: 0.817
+network: 0.725
+mistranslation: 0.718
+socket: 0.614
+graphic: 0.603
+semantic: 0.548
+vnc: 0.504
+assembly: 0.248
+KVM: 0.196
+
+qemu-system-arm highmem support broken with TCG
+Additional information:
+I initially bisected this to commit 39a1fd25287f ("target/arm: Fix handling of LPAE block descriptors"), which introduced an identical bug by masking the wrong address bits due to a type mismatch, but this was in turn fixed by commit c2360eaa0262 ("target/arm: Fix qemu-system-arm handling of LPAE block descriptors for highmem"). The bug resurfaced between qemu-7.1.0 and qemu-7.2.0 after commit f3639a64f602 ("target/arm: Use softmmu tlbs for page table walking"), but may be caused by the preceding 4a35855682ce ("target/arm: Plumb debug into S1Translate") which fails to boot for an unrelated reason.
+
+I reproduced this on qemu-7.2 as shipped by Debian as well as on qemu-9.1 (built locally).
+
+Part of this problem appeared to be hidden by the 'highmem=on' argument not having the intended effect during parts of the bisection, which I worked around by overriding the 'pa_bits' variable in machvirt_init().