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unicorn/qemu/target/arm
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Marc Zyngier 145d58c367
target/arm: Honor HCR_EL2.TID3 trapping requirements 
HCR_EL2.TID3 mandates that access from EL1 to a long list of id
registers traps to EL2, and QEMU has so far ignored this requirement.

This breaks (among other things) KVM guests that have PtrAuth enabled,
while the hypervisor doesn't want to expose the feature to its guest.
To achieve this, KVM traps the ID registers (ID_AA64ISAR1_EL1 in this
case), and masks out the unsupported feature.

QEMU not honoring the trap request means that the guest observes
that the feature is present in the HW, starts using it, and dies
a horrible death when KVM injects an UNDEF, because the feature
*really* isn't supported.

Do the right thing by trapping to EL2 if HCR_EL2.TID3 is set.

Note that this change does not include trapping of the MVFR
registers from AArch32 (they are accessed via the VMRS
instruction and need to be handled in a different way).

Backports commit 6a4ef4e5d1084ce41fafa7d470a644b0fd3d9317 from qemu
2019-11-28 03:46:32 -05:00
..
a32-uncond.decode target/arm: Convert Unallocated memory hint 2019-11-28 02:47:41 -05:00
a32.decode target/arm: Convert SVC 2019-11-28 02:46:55 -05:00
arm-powerctl.c arm: Clarify the logic of set_pc() 2019-02-03 17:55:30 -05:00
arm-powerctl.h ARM: Factor out ARM on/off PSCI control functions 2018-03-01 23:31:47 -05:00
arm_ldst.h Fix Thumb-1 BE32 execution and disassembly. 2018-03-02 00:20:11 -05:00
cpu-param.h tcg: Split out target/arch/cpu-param.h 2019-06-10 19:35:46 -04:00
cpu-qom.h target/arm: Add "-cpu max" support 2018-03-12 10:11:49 -04:00
cpu.c target/arm: Avoid bogus NSACR traps on M-profile without Security Extension 2019-08-08 19:56:56 -04:00
cpu.h target/arm: Support EL0 v7m msr/mrs for CONFIG_USER_ONLY 2019-11-28 03:29:46 -05:00
cpu64.c target/arm: generate a custom MIDR for -cpu max 2019-11-18 16:42:51 -05:00
crypto_helper.c target/arm/cpu and crypto_helper: Correct bad merge and adjust to qemu code style 2018-03-12 11:57:24 -04:00
debug_helper.c target/arm: Move debug routines to debug_helper.c 2019-08-08 17:46:56 -04:00
helper-a64.c target/arm: Use env_cpu, env_archcpu 2019-06-12 11:34:08 -04:00
helper-a64.h target/arm: check CF_PARALLEL instead of parallel_cpus 2019-05-04 22:44:32 -04:00
helper-sve.h target/arm: Rewrite vector gather first-fault loads 2018-10-08 14:15:15 -04:00
helper.c target/arm: Honor HCR_EL2.TID3 trapping requirements 2019-11-28 03:46:32 -05:00
helper.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
internals.h target/arm: Declare some M-profile functions publicly 2019-08-08 15:37:01 -04:00
iwmmxt_helper.c target/arm: Untabify iwmmxt_helper.c 2018-08-25 04:33:44 -04:00
kvm-consts.h arm: better stub version for MISMATCH_CHECK 2018-03-02 00:13:45 -05:00
m_helper.c target/arm: Fix handling of cortex-m FTYPE flag in EXCRET 2019-11-28 03:40:37 -05:00
Makefile.objs target/arm: Add skeleton for T16 decodetree 2019-11-28 02:50:27 -05:00
neon_helper.c target/arm: Use tcg_gen_abs_i64 and tcg_gen_gvec_abs 2019-05-16 16:43:02 -04:00
op_addsub.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
op_helper.c target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
pauth_helper.c target/arm: Fix output of PAuth Auth 2019-06-13 16:17:00 -04:00
psci.c fix WFI/WFE length in syndrome register 2018-03-05 11:21:51 -05:00
sve.decode target/arm: Sychronize with qemu 2019-04-18 04:49:11 -04:00
sve_helper.c tcg: Use tlb_fill probe from tlb_vaddr_to_host 2019-05-16 18:27:03 -04:00
t16.decode target/arm: Convert T16, long branches 2019-11-28 02:53:54 -05:00
t32.decode target/arm: Convert TT 2019-11-28 02:48:06 -05:00
tlb_helper.c target/arm: Move TLB related routines to tlb_helper.c 2019-08-08 15:24:26 -04:00
translate-a64.c target/arm: Amend bad merge 2019-11-28 03:29:56 -05:00
translate-a64.h tcg: TCGMemOp is now accelerator independent MemOp 2019-11-28 03:01:12 -05:00
translate-sve.c tcg: TCGMemOp is now accelerator independent MemOp 2019-11-28 03:01:12 -05:00
translate-vfp.inc.c target/arm: Factor out unallocated_encoding for aarch32 2019-11-18 23:51:45 -05:00
translate.c target/arm: Amend bad merge 2019-11-28 03:29:56 -05:00
translate.h tcg: TCGMemOp is now accelerator independent MemOp 2019-11-28 03:01:12 -05:00
unicorn.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
unicorn_aarch64.c unicorn_aarch64: Use aa64_vfp_qreg instead of aa32_vfp_dreg 2018-09-03 07:47:40 +01:00
unicorn_arm.c unicorn_arm: Treat registers as unsigned values in casts 2019-04-26 08:48:31 -04:00
vec_helper.c target/arm: Add helpers for FMLAL 2019-02-28 15:31:48 -05:00
vfp-uncond.decode target/arm: Convert VCVTA/VCVTN/VCVTP/VCVTM to decodetree 2019-06-13 16:54:42 -04:00
vfp.decode target/arm: Use vfp_expand_imm() for AArch32 VFP VMOV_imm 2019-06-25 18:20:19 -05:00
vfp_helper.c target/arm/vfp_helper: Call set_fpscr_to_host before updating to FPSCR 2019-08-08 19:21:28 -04:00