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target/arm: Disable has_el2 and has_el3 for user-only 

In arm_cpu_reset, we configure many system registers so that user-only
behaves as it should with a minimum of ifdefs.  However, we do not set
all of the system registers as required for a cpu with EL2 and EL3.

Disabling EL2 and EL3 mean that we will not look at those registers,
which means that we don't have to worry about configuring them.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200229012811.24129-4-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-03-05 16:09:17 +00:00 committed by Peter Maydell
parent e0a38bb35a
commit 45ca3a1408
1 changed files with 4 additions and 2 deletions
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6
target/arm/cpu.c
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@ -1103,11 +1103,13 @@ static Property arm_cpu_reset_hivecs_property =
static Property arm_cpu_rvbar_property =
DEFINE_PROP_UINT64("rvbar", ARMCPU, rvbar, 0);
#ifndef CONFIG_USER_ONLY
static Property arm_cpu_has_el2_property =
DEFINE_PROP_BOOL("has_el2", ARMCPU, has_el2, true);
static Property arm_cpu_has_el3_property =
DEFINE_PROP_BOOL("has_el3", ARMCPU, has_el3, true);
#endif
static Property arm_cpu_cfgend_property =
DEFINE_PROP_BOOL("cfgend", ARMCPU, cfgend, false);
@ -1222,25 +1224,25 @@ void arm_cpu_post_init(Object *obj)
qdev_property_add_static(DEVICE(obj), &arm_cpu_rvbar_property);
}
#ifndef CONFIG_USER_ONLY
if (arm_feature(&cpu->env, ARM_FEATURE_EL3)) {
/* Add the has_el3 state CPU property only if EL3 is allowed. This will
* prevent "has_el3" from existing on CPUs which cannot support EL3.
*/
qdev_property_add_static(DEVICE(obj), &arm_cpu_has_el3_property);
#ifndef CONFIG_USER_ONLY
object_property_add_link(obj, "secure-memory",
TYPE_MEMORY_REGION,
(Object **)&cpu->secure_memory,
qdev_prop_allow_set_link_before_realize,
OBJ_PROP_LINK_STRONG,
&error_abort);
#endif
}
if (arm_feature(&cpu->env, ARM_FEATURE_EL2)) {
qdev_property_add_static(DEVICE(obj), &arm_cpu_has_el2_property);
}
#endif
if (arm_feature(&cpu->env, ARM_FEATURE_PMU)) {
cpu->has_pmu = true;