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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:34:26 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:35:44 +0000
commit25f8033d556aa17afaea4a5196ea7a69fe248320 (patch)
tree0f056db167683be54ea1e5e72d29d6069af55e7d /results/classifier/deepseek-2-tmp/output/hypervisor/1838913
parent8e6da29e4ee5fc14bc1cc816a24f21271f14090d (diff)
downloademulator-bug-study-25f8033d556aa17afaea4a5196ea7a69fe248320.tar.gz
emulator-bug-study-25f8033d556aa17afaea4a5196ea7a69fe248320.zip
add new temporary deepseek-r1:14b results
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+
+Single-step exceptions incorrectly routed to EL1 when ELD is EL2 (TDE = 1) (qemu version 3.1)
+
+Hi,
+
+I've been encountering issues with QEMU 3.1 when trying to single-step EL1 code, with ELD = EL2 (MDCR_EL2.TDE = 1). I could test with latest commit in a few hours, if you want.
+
+EL1 is Aarch64.
+
+These happen as soon as MDSCR_EL1.SS is set to 1 and ERET is executed:
+
+1) Single-step exceptions are generated even if they should not be (SPSR_EL2.SS = 0)
+
+2) Single-step exceptions are routed to EL1
+
+Exception return from AArch64 EL2 to AArch64 EL1 PC 0x4000005c
+Taking exception 1 [Undefined Instruction]
+...from EL1 to EL1
+...with ESR 0x32/0xca000022
+...with ELR 0x4000005c
+...to EL1 PC 0x200 PSTATE 0x3c5
+
+EC 0x32 (0b110010) is Exception_SoftwareStepLowerEl.
+
+You can find enclosed minimal code (and resulting .elf) for reproduction. 
+
+qemu-system-aarch64 -nographic -machine virt,virtualization=on -d unimp,int -cpu cortex-a57 -kernel test_hyp.elf
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