qemu/target
Peter Maydell d009607d08 Revert "arm/kvm: add support for MTE"
This reverts commit b320e21c48,
which accidentally broke TCG, because it made the TCG -cpu max
report the presence of MTE to the guest even if the board hadn't
enabled MTE by wiring up the tag RAM. This meant that if the guest
then tried to use MTE QEMU would segfault accessing the
non-existent tag RAM:

    ==346473==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address (pc 0x55f328952a4a bp 0x00000213a400 sp 0x7f7871859b80 T346476)
    ==346473==The signal is caused by a READ memory access.
    ==346473==Hint: this fault was caused by a dereference of a high value address (see register values below).  Disassemble the provided pc to learn which register was used.
        #0 0x55f328952a4a in address_space_to_flatview /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/include/exec/memory.h:1108:12
        #1 0x55f328952a4a in address_space_translate /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/include/exec/memory.h:2797:31
        #2 0x55f328952a4a in allocation_tag_mem /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-clang/../../target/arm/tcg/mte_helper.c:176:10
        #3 0x55f32895366c in helper_stgm /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-clang/../../target/arm/tcg/mte_helper.c:461:15
        #4 0x7f782431a293  (<unknown module>)

It's also not clear that the KVM logic is correct either:
MTE defaults to on there, rather than being only on if the
board wants it on.

Revert the whole commit for now so we can sort out the issues.

(We didn't catch this in CI because we have no test cases in
avocado that use guests with MTE support.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20230519145808.348701-1-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-05-19 08:01:15 -07:00
..
alpha target/alpha: Use MO_ALIGN where required 2023-05-05 17:05:58 +01:00
arm Revert "arm/kvm: add support for MTE" 2023-05-19 08:01:15 -07:00
avr target/avr: Finish conversion to tcg_gen_qemu_{ld,st}_* 2023-05-05 17:05:28 +01:00
cris target/cris: Finish conversion to tcg_gen_qemu_{ld,st}_* 2023-05-05 17:05:28 +01:00
hexagon Hexagon (gdbstub): add HVX support 2023-05-18 12:40:52 -07:00
hppa target/hppa: Use MO_ALIGN for system UNALIGN() 2023-05-05 17:05:58 +01:00
i386 target/i386: Fix exception classes for MOVNTPS/MOVNTPD. 2023-05-18 08:53:50 +02:00
loongarch target/loongarch: Do not include tcg-ldst.h 2023-05-11 09:53:41 +01:00
m68k target/m68k: Fix gen_load_fp for OS_LONG 2023-05-11 09:49:25 +01:00
microblaze target/microblaze: Remove NB_MMU_MODES define 2023-03-13 06:44:37 -07:00
mips target/mips: Use MO_ALIGN instead of 0 2023-05-11 09:53:41 +01:00
nios2 target/nios2: Remove TARGET_ALIGNED_ONLY 2023-05-11 09:53:41 +01:00
openrisc target/openrisc: Setup FPU for detecting tininess before rounding 2023-05-11 15:40:28 +01:00
ppc tcg: ppc64: Fix mask generation for vextractdm 2023-05-05 12:34:22 -03:00
riscv target/riscv: add Ventana's Veyron V1 CPU 2023-05-05 10:49:50 +10:00
rx target/rx: Avoid tcg_const_i32 2023-03-13 06:44:37 -07:00
s390x target/s390x: Fix EXECUTE of relative branches 2023-05-16 09:14:18 +02:00
sh4 target/sh4: Use MO_ALIGN where required 2023-05-11 09:53:41 +01:00
sparc target/sparc: Use cpu_ld*_code_mmu 2023-05-05 17:09:47 +01:00
tricore target/tricore: Use min/max for saturate 2023-03-13 07:03:39 -07:00
xtensa target/xtensa: Finish conversion to tcg_gen_qemu_{ld, st}_* 2023-05-05 17:05:29 +01:00
Kconfig hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00
meson.build target/loongarch: Add target build suport 2022-06-06 18:09:03 +00:00