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target/arm: add arm_is_el2_enabled() helper 

This checks if EL2 is enabled (meaning EL2 registers take effects) in
the current security context.

Signed-off-by: Rémi Denis-Courmont <remi.denis.courmont@huawei.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210112104511.36576-2-remi.denis.courmont@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Rémi Denis-Courmont 2021-01-12 12:44:54 +02:00 committed by Peter Maydell
parent cc974d5cd8
commit f3ee5160ce
1 changed files with 17 additions and 0 deletions
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17
target/arm/cpu.h
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@ -2148,6 +2148,18 @@ static inline bool arm_is_secure(CPUARMState *env)
return arm_is_secure_below_el3(env);
}
/*
* Return true if the current security state has AArch64 EL2 or AArch32 Hyp.
* This corresponds to the pseudocode EL2Enabled()
*/
static inline bool arm_is_el2_enabled(CPUARMState *env)
{
if (arm_feature(env, ARM_FEATURE_EL2)) {
return !arm_is_secure_below_el3(env);
}
return false;
}
#else
static inline bool arm_is_secure_below_el3(CPUARMState *env)
{
@ -2158,6 +2170,11 @@ static inline bool arm_is_secure(CPUARMState *env)
{
return false;
}
static inline bool arm_is_el2_enabled(CPUARMState *env)
{
return false;
}
#endif
/**