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kern: support dynamic resource expansion for system heaps/events/sessions.

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This commit is contained in:
Michael Scire 2021-09-17 22:01:58 -07:00
parent dfd57b09a3
commit f8fd072349
37 changed files with 856 additions and 328 deletions
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43
libraries/libmesosphere/source/kern_k_resource_limit.cpp
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@ -49,7 +49,8 @@ namespace ams::kern {
KScopedLightLock lk(m_lock);
value = m_limit_values[which];
MESOSPHERE_ASSERT(value >= 0);
MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_values[which] <= m_peak_values[which]);
MESOSPHERE_ASSERT(m_peak_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
}
@ -64,7 +65,8 @@ namespace ams::kern {
KScopedLightLock lk(m_lock);
value = m_current_values[which];
MESOSPHERE_ASSERT(value >= 0);
MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_values[which] <= m_peak_values[which]);
MESOSPHERE_ASSERT(m_peak_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
}
@ -79,7 +81,8 @@ namespace ams::kern {
KScopedLightLock lk(m_lock);
value = m_peak_values[which];
MESOSPHERE_ASSERT(value >= 0);
MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_values[which] <= m_peak_values[which]);
MESOSPHERE_ASSERT(m_peak_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
}
@ -93,7 +96,8 @@ namespace ams::kern {
{
KScopedLightLock lk(m_lock);
MESOSPHERE_ASSERT(m_current_values[which] >= 0);
MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_values[which] <= m_peak_values[which]);
MESOSPHERE_ASSERT(m_peak_values[which] <= m_limit_values[which]);
MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
value = m_limit_values[which] - m_current_values[which];
}
@ -113,6 +117,37 @@ namespace ams::kern {
return ResultSuccess();
}
void KResourceLimit::Add(ams::svc::LimitableResource which, s64 value) {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(KTargetSystem::IsDynamicResourceLimitsEnabled());
KScopedLightLock lk(m_lock);
/* Check that this is a true increase. */
MESOSPHERE_ABORT_UNLESS(value > 0);
/* Check that we can perform an increase. */
MESOSPHERE_ABORT_UNLESS(m_current_values[which] <= m_peak_values[which]);
MESOSPHERE_ABORT_UNLESS(m_peak_values[which] <= m_limit_values[which]);
MESOSPHERE_ABORT_UNLESS(m_current_hints[which] <= m_current_values[which]);
/* Check that the increase doesn't cause an overflow. */
const auto increased_limit = m_limit_values[which] + value;
const auto increased_current = m_current_values[which] + value;
const auto increased_hint = m_current_hints[which] + value;
MESOSPHERE_ABORT_UNLESS(m_limit_values[which] < increased_limit);
MESOSPHERE_ABORT_UNLESS(m_current_values[which] < increased_current);
MESOSPHERE_ABORT_UNLESS(m_current_hints[which] < increased_hint);
/* Add the value. */
m_limit_values[which] = increased_limit;
m_current_values[which] = increased_current;
m_current_hints[which] = increased_hint;
/* Update our peak. */
m_peak_values[which] = std::max(m_peak_values[which], increased_current);
}
bool KResourceLimit::Reserve(ams::svc::LimitableResource which, s64 value) {
return this->Reserve(which, value, KHardwareTimer::GetTick() + DefaultTimeout);
}