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target/arm: Add pre-EL change hooks

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Because the design of the PMU requires that the counter values be
converted between their delta and guest-visible forms for mode
filtering, an additional hook which occurs before the EL is changed is
necessary.

Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org>
Message-id: 1523997485-1905-8-git-send-email-alindsay@codeaurora.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Aaron Lindsay 2018-04-26 11:04:39 +01:00 • committed by Peter Maydell
parent 08267487c9
commit b5c53d1b38
5 changed files with 58 additions and 9 deletions
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14
target/arm/helper.c
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@ -8249,6 +8249,14 @@ void arm_cpu_do_interrupt(CPUState *cs)
return;
}
/* Hooks may change global state so BQL should be held, also the
* BQL needs to be held for any modification of
* cs->interrupt_request.
*/
g_assert(qemu_mutex_iothread_locked());
arm_call_pre_el_change_hook(cpu);
assert(!excp_is_internal(cs->exception_index));
if (arm_el_is_aa64(env, new_el)) {
arm_cpu_do_interrupt_aarch64(cs);
@ -8256,12 +8264,6 @@ void arm_cpu_do_interrupt(CPUState *cs)
arm_cpu_do_interrupt_aarch32(cs);
}
/* Hooks may change global state so BQL should be held, also the
* BQL needs to be held for any modification of
* cs->interrupt_request.
*/
g_assert(qemu_mutex_iothread_locked());
arm_call_el_change_hook(cpu);
if (!kvm_enabled()) {