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qemu-cr16/target/arm
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Peter Maydell b62ceeaf80 target/arm: Don't skip M-profile reset entirely in user mode 
Currently all of the M-profile specific code in arm_cpu_reset() is
inside a !defined(CONFIG_USER_ONLY) ifdef block.  This is
unintentional: it happened because originally the only
M-profile-specific handling was the setup of the initial SP and PC
from the vector table, which is system-emulation only.  But then we
added a lot of other M-profile setup to the same "if (ARM_FEATURE_M)"
code block without noticing that it was all inside a not-user-mode
ifdef.  This has generally been harmless, but with the addition of
v8.1M low-overhead-loop support we ran into a problem: the reset of
FPSCR.LTPSIZE to 4 was only being done for system emulation mode, so
if a user-mode guest tried to execute the LE instruction it would
incorrectly take a UsageFault.

Adjust the ifdefs so only the really system-emulation specific parts
are covered.  Because this means we now run some reset code that sets
up initial values in the FPCCR and similar FPU related registers,
explicitly set up the registers controlling FPU context handling in
user-emulation mode so that the FPU works by design and not by
chance.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/613
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210914120725.24992-2-peter.maydell@linaro.org
2021-09-20 09:54:33 +01:00
..
a32-uncond.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
a32.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
arch_dump.c target/arm: add spaces around operator 2020-11-10 11:03:47 +00:00
arm-powerctl.c
arm-powerctl.h
arm_ldst.h accel/tcg: Add DisasContextBase argument to translator_ld* 2021-09-14 12:00:20 -07:00
cpu-param.h linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE 2021-02-16 13:06:16 +00:00
cpu-qom.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
cpu.c target/arm: Don't skip M-profile reset entirely in user mode 2021-09-20 09:54:33 +01:00
cpu.h target/arm: Restrict cpu_exec_interrupt() handler to sysemu 2021-09-14 12:00:21 -07:00
cpu64.c target-arm: Add support for Fujitsu A64FX 2021-09-01 11:08:18 +01:00
cpu_tcg.c target/arm: Restrict cpu_exec_interrupt() handler to sysemu 2021-09-14 12:00:21 -07:00
crypto_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
debug_helper.c accel/tcg: Remove TranslatorOps.breakpoint_check 2021-07-21 07:47:05 -10:00
gdbstub.c target/arm: Enforce that M-profile SP low 2 bits are always zero 2021-07-27 10:57:39 +01:00
gdbstub64.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
helper-a64.c target/arm: Take an exception if PSTATE.IL is set 2021-09-13 21:01:08 +01:00
helper-a64.h target/arm: Merge mte_check1, mte_checkN 2021-04-30 11:16:49 +01:00
helper-mve.h target/arm: Implement MVE VRINT insns 2021-09-01 11:08:17 +01:00
helper-sve.h target/arm: Implement vector float32 to bfloat16 conversion 2021-06-03 16:43:26 +01:00
helper.c target/arm: Take an exception if PSTATE.IL is set 2021-09-13 21:01:08 +01:00
helper.h target/arm: Implement HSTR.TJDBX 2021-08-26 17:02:01 +01:00
idau.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
internals.h target/arm: Export aarch64_sve_zcr_get_valid_len 2021-07-27 10:57:40 +01:00
iwmmxt_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
Kconfig meson: Introduce target-specific Kconfig 2021-07-09 18:21:34 +02:00
kvm-consts.h target/arm: Remove no-longer-reachable 32-bit KVM code 2020-09-14 14:23:19 +01:00
kvm-stub.c
kvm.c hw/arm/virt: KVM: Probe for KVM_CAP_ARM_VM_IPA_SIZE when creating scratch VM 2021-09-13 16:07:22 +01:00
kvm64.c target/arm/kvm64: Ensure sve vls map is completely clear 2021-08-26 17:01:59 +01:00
kvm_arm.h hw/arm/virt: add ITS support in virt GIC 2021-09-13 21:01:08 +01:00
m-nocp.decode target/arm: Don't NOCP fault for FPCXT_NS accesses 2021-06-21 16:49:37 +01:00
m_helper.c target/arm: Implement M-profile trapping on division by zero 2021-08-25 10:48:50 +01:00
machine.c target/arm: Make FPSCR.LTPSIZE writable for MVE 2021-06-03 16:43:25 +01:00
meson.build target/arm: Implement MVE VLDR/VSTR (non-widening forms) 2021-06-21 16:49:38 +01:00
monitor.c target/arm: Add cpu properties to control pauth 2021-01-19 14:38:51 +00:00
mte_helper.c target/arm: Implement MTE3 2021-06-24 14:58:48 +01:00
mve.decode target/arm: Implement MVE VRINT insns 2021-09-01 11:08:17 +01:00
mve_helper.c target/arm: Implement MVE VRINT insns 2021-09-01 11:08:17 +01:00
neon-dp.decode target/arm: Implement vector float32 to bfloat16 conversion 2021-06-03 16:43:26 +01:00
neon-ls.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
neon-shared.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
neon_helper.c target/arm: Split out saturating/rounding shifts from neon 2021-05-25 16:01:43 +01:00
op_addsub.h
op_helper.c target/arm: Implement HSTR.TJDBX 2021-08-26 17:02:01 +01:00
pauth_helper.c target/arm: Implement an IMPDEF pauth algorithm 2021-01-19 14:38:51 +00:00
psci.c
sve.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
sve_helper.c bitops.h: Provide hswap32(), hswap64(), wswap64() swapping operations 2021-06-16 14:33:52 +01:00
syndrome.h target/arm: Take an exception if PSTATE.IL is set 2021-09-13 21:01:08 +01:00
t16.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
t32.decode target/arm: Implement MVE VCTP 2021-08-25 10:48:50 +01:00
tlb_helper.c target/arm: Set ARMMMUFaultInfo.level in user-only arm_cpu_tlb_fill 2021-03-23 14:07:55 +00:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
translate-a32.h target/arm: Implement MVE VCTP 2021-08-25 10:48:50 +01:00
translate-a64.c accel/tcg: Add DisasContextBase argument to translator_ld* 2021-09-14 12:00:20 -07:00
translate-a64.h target/arm: Implement SVE2 XAR 2021-05-25 16:01:44 +01:00
translate-m-nocp.c target/arm: Handle FPU check for FPCXT_NS insns via vfp_access_check_m() 2021-06-21 16:49:38 +01:00
translate-mve.c target/arm: Implement MVE VRINT insns 2021-09-01 11:08:17 +01:00
translate-neon.c target/arm: Implement MVE VADD (floating-point) 2021-09-01 11:08:16 +01:00
translate-sve.c target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
translate-vfp.c target/arm: Implement MVE VMOV to/from 2 general-purpose registers 2021-08-25 10:48:50 +01:00
translate.c accel/tcg: Add DisasContextBase argument to translator_ld* 2021-09-14 12:00:20 -07:00
translate.h target/arm: Take an exception if PSTATE.IL is set 2021-09-13 21:01:08 +01:00
vec_helper.c target/arm: Implement MVE VMULL (polynomial) 2021-08-25 10:48:49 +01:00
vec_internal.h target/arm: Implement MVE VMULL (polynomial) 2021-08-25 10:48:49 +01:00
vfp-uncond.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
vfp.decode target/arm: Don't NOCP fault for FPCXT_NS accesses 2021-06-21 16:49:37 +01:00
vfp_helper.c target/arm: Check NaN mode before silencing NaN 2021-07-02 11:48:36 +01:00