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qemu/target/arm
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Peter Maydell a15945d98d target/arm: Make FPSCR/FPCR trapped-exception bits RAZ/WI 
The {IOE, DZE, OFE, UFE, IXE, IDE} bits in the FPSCR/FPCR are for
enabling trapped IEEE floating point exceptions (where IEEE exception
conditions cause a CPU exception rather than updating the FPSR status
bits). QEMU doesn't implement this (and nor does the hardware we're
modelling), but for implementations which don't implement trapped
exception handling these control bits are supposed to be RAZ/WI.
This allows guest code to test for whether the feature is present
by trying to write to the bit and checking whether it sticks.

QEMU is incorrectly making these bits read as written. Make them
RAZ/WI as the architecture requires.

In particular this was causing problems for the NetBSD automatic
test suite.

Reported-by: Martin Husemann <martin@netbsd.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190131130700.28392-1-peter.maydell@linaro.org
2019-02-05 16:52:42 +00:00
..
arch_dump.c target/arm: Add aa{32, 64}_vfp_{dreg, qreg} helpers 2018-01-25 11:45:29 +00:00
arm_ldst.h target: Do not include "exec/exec-all.h" if it is not necessary 2018-06-01 14:15:10 +02:00
arm-powerctl.c arm: Clarify the logic of set_pc() 2019-02-01 14:55:46 +00:00
arm-powerctl.h target-arm/powerctl: defer cpu reset work to CPU context 2017-02-24 10:32:46 +00:00
arm-semi.c target/arm: Remove a handful of stray tabs 2018-08-24 13:17:48 +01:00
cpu64.c target/arm: Enable BTI for -cpu max 2019-02-05 16:52:38 +00:00
cpu-qom.h arm: replace instance_post_init() 2019-01-07 16:18:42 +04:00
cpu.c target/arm: Enable TBI for user-only 2019-02-05 16:52:40 +00:00
cpu.h target/arm: Make FPSCR/FPCR trapped-exception bits RAZ/WI 2019-02-05 16:52:42 +00:00
crypto_helper.c target: Do not include "exec/exec-all.h" if it is not necessary 2018-06-01 14:15:10 +02:00
gdbstub64.c Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
gdbstub.c arm: fix malloc type mismatch 2018-05-31 14:50:52 +01:00
helper-a64.c target/arm: Add new_pc argument to helper_exception_return 2019-01-21 10:38:53 +00:00
helper-a64.h target/arm: Add new_pc argument to helper_exception_return 2019-01-21 10:38:53 +00:00
helper-sve.h target/arm: Rewrite vector gather first-fault loads 2018-10-08 14:55:03 +01:00
helper.c target/arm: Make FPSCR/FPCR trapped-exception bits RAZ/WI 2019-02-05 16:52:42 +00:00
helper.h target/arm: Move helper_exception_return to helper-a64.c 2019-01-21 10:38:53 +00:00
idau.h qom: make interface types abstract 2018-12-11 15:45:22 -02:00
internals.h target/arm: Compute TB_FLAGS for TBI for user-only 2019-02-05 16:52:40 +00:00
iwmmxt_helper.c target/arm: Untabify iwmmxt_helper.c 2018-08-24 13:17:48 +01:00
kvm32.c target/arm: Fill in ARMISARegisters for kvm32 2018-11-19 15:29:08 +00:00
kvm64.c target/arm: Move id_aa64mmfr* to ARMISARegisters 2018-12-13 14:40:56 +00:00
kvm_arm.h target/arm: Install ARMISARegisters from kvm host 2018-11-19 15:29:07 +00:00
kvm-consts.h arm: add trailing ; after MISMATCH_CHECK 2017-02-01 03:37:18 +02:00
kvm-stub.c Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
kvm.c qemu/queue.h: leave head structs anonymous unless necessary 2019-01-11 15:46:55 +01:00
machine.c target/arm: Swap PMU values before/after migrations 2019-01-21 10:38:55 +00:00
Makefile.objs target/arm: Add PAuth helpers 2019-01-21 10:38:53 +00:00
monitor.c qapi: Empty out qapi-schema.json 2018-03-02 13:45:50 -06:00
neon_helper.c target: Do not include "exec/exec-all.h" if it is not necessary 2018-06-01 14:15:10 +02:00
op_addsub.h Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
op_helper.c target/arm: Move helper_exception_return to helper-a64.c 2019-01-21 10:38:53 +00:00
pauth_helper.c target/arm: Implement pauth_computepac 2019-01-21 10:38:55 +00:00
psci.c target: Do not include "exec/exec-all.h" if it is not necessary 2018-06-01 14:15:10 +02:00
sve_helper.c target/arm/sve_helper: Fix compilation with clang 3.4 2018-11-28 15:31:15 +00:00
sve.decode target/arm: SVE brk[ab] merging does not have s bit 2019-01-07 15:23:45 +00:00
trace-events target/arm/kvm: Translate the MSI doorbell in kvm_arch_fixup_msi_route 2018-05-04 18:52:58 +01:00
translate-a64.c target/arm: Clean TBI for data operations in the translator 2019-02-05 16:52:40 +00:00
translate-a64.h target/arm: Extend vec_reg_offset to larger sizes 2018-06-15 15:23:34 +01:00
translate-sve.c decodetree: Remove "insn" argument from trans_* expanders 2018-10-31 16:48:54 +00:00
translate.c target/arm: Emit barriers for A32/T32 load-acquire/store-release insns 2019-01-07 15:23:48 +00:00
translate.h target/arm: Add TBFLAG_A64_TBID, split out gen_top_byte_ignore 2019-02-05 16:52:39 +00:00
vec_helper.c target/arm: Implement SVE dot product (indexed) 2018-06-29 15:11:15 +01:00