diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2016-02-18 14:16:16 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-02-18 14:16:16 +0000 |
| commit | f2cae6092767aaf418778eada15be444c23883be (patch) | |
| tree | c865749fe752317d18af34713b3aa19c653b0de6 | |
| parent | d6c8cf815171e35e0b1ef4e0cff602ab3d575747 (diff) | |
target-arm: Report correct syndrome for FPEXC32_EL2 traps
If access to FPEXC32_EL2 is trapped by CPTR_EL2.TFP or CPTR_EL3.TFP,
this should be reported with a syndrome register indicating an
FP access trap, not one indicating a system register access trap.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
| -rw-r--r-- | target-arm/cpu.h | 5 | ||||
| -rw-r--r-- | target-arm/helper.c | 4 | ||||
| -rw-r--r-- | target-arm/op_helper.c | 13 |
3 files changed, 20 insertions, 2 deletions
diff --git a/target-arm/cpu.h b/target-arm/cpu.h index 77f9b51b76..16238216f4 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -1334,6 +1334,11 @@ typedef enum CPAccessResult { /* As CP_ACCESS_UNCATEGORIZED, but for traps directly to EL2 or EL3 */ CP_ACCESS_TRAP_UNCATEGORIZED_EL2 = 5, CP_ACCESS_TRAP_UNCATEGORIZED_EL3 = 6, + /* Access fails and results in an exception syndrome for an FP access, + * trapped directly to EL2 or EL3 + */ + CP_ACCESS_TRAP_FP_EL2 = 7, + CP_ACCESS_TRAP_FP_EL3 = 8, } CPAccessResult; /* Access functions for coprocessor registers. These cannot fail and diff --git a/target-arm/helper.c b/target-arm/helper.c index e2b72389be..bb913c6e17 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -3011,10 +3011,10 @@ static CPAccessResult fpexc32_access(CPUARMState *env, const ARMCPRegInfo *ri, bool isread) { if ((env->cp15.cptr_el[2] & CPTR_TFP) && arm_current_el(env) == 2) { - return CP_ACCESS_TRAP_EL2; + return CP_ACCESS_TRAP_FP_EL2; } if (env->cp15.cptr_el[3] & CPTR_TFP) { - return CP_ACCESS_TRAP_EL3; + return CP_ACCESS_TRAP_FP_EL3; } return CP_ACCESS_OK; } diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c index 4c0980e5a5..049b52158b 100644 --- a/target-arm/op_helper.c +++ b/target-arm/op_helper.c @@ -500,6 +500,19 @@ void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome, target_el = 3; syndrome = syn_uncategorized(); break; + case CP_ACCESS_TRAP_FP_EL2: + target_el = 2; + /* Since we are an implementation that takes exceptions on a trapped + * conditional insn only if the insn has passed its condition code + * check, we take the IMPDEF choice to always report CV=1 COND=0xe + * (which is also the required value for AArch64 traps). + */ + syndrome = syn_fp_access_trap(1, 0xe, false); + break; + case CP_ACCESS_TRAP_FP_EL3: + target_el = 3; + syndrome = syn_fp_access_trap(1, 0xe, false); + break; default: g_assert_not_reached(); } |