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Kernel/aarch64: Stub enough functions to build Random.cpp

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Also update Random.cpp such that it builds for aarch64.
This commit is contained in:
Timon Kruiper 2022-10-20 13:17:25 +02:00 • committed by Gunnar Beutner
parent a998bba73b
commit cede752cd1
3 changed files with 23 additions and 15 deletions
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9
Kernel/Random.cpp
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@ -28,6 +28,7 @@ KernelRng& KernelRng::the()
UNMAP_AFTER_INIT KernelRng::KernelRng()
{
#if ARCH(I386) || ARCH(X86_64)
bool supports_rdseed = Processor::current().has_feature(CPUFeature::RDSEED);
bool supports_rdrand = Processor::current().has_feature(CPUFeature::RDRAND);
if (supports_rdseed || supports_rdrand) {
@ -50,9 +51,7 @@ UNMAP_AFTER_INIT KernelRng::KernelRng()
add_random_event(value, i % 32);
}
}
#if ARCH(I386) || ARCH(X86_64)
else if (TimeManagement::the().can_query_precise_time()) {
} else if (TimeManagement::the().can_query_precise_time()) {
// Add HPET as entropy source if we don't have anything better.
dmesgln("KernelRng: Using HPET as entropy source");
@ -70,6 +69,8 @@ UNMAP_AFTER_INIT KernelRng::KernelRng()
current_time += 0x40b2u;
}
}
#else
dmesgln("KernelRng: No entropy source available!");
#endif
}
@ -121,7 +122,7 @@ bool get_good_random_bytes(Bytes buffer, bool allow_wait, bool fallback_to_fast)
bool result = false;
auto& kernel_rng = KernelRng::the();
// FIXME: What if interrupts are disabled because we're in an interrupt?
bool can_wait = are_interrupts_enabled();
bool can_wait = Processor::are_interrupts_enabled();
if (!can_wait && allow_wait) {
// If we can't wait but the caller would be ok with it, then we
// need to definitely fallback to *something*, even if it's less