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vm_session: add fpu state for x86

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Issue #3111
This commit is contained in:
Alexander Boettcher
2019-05-20 15:36:47 +02:00
committed by Christian Helmuth
parent 5673c163fb
commit ab6315d6b4
5 changed files with 45 additions and 5 deletions
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16
repos/base-nova/src/lib/base/vm_session.cc
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@ -58,6 +58,12 @@ struct Vcpu {
state = Vm_state {};
state.exit_reason = exit_reason;
if (utcb.mtd & Nova::Mtd::FPU) {
state.fpu.value([&] (uint8_t *fpu, size_t const) {
asm volatile ("fxsave %0" : "=m" (*fpu));
});
}
if (utcb.mtd & Nova::Mtd::ACDB) {
state.ax.value(utcb.ax);
state.cx.value(utcb.cx);
@ -190,7 +196,6 @@ struct Vcpu {
state.tpr_threshold.value(utcb.read_tpr_threshold());
}
/* XXX FPU state missing */
}
static void _write_nova_state(Nova::Utcb &utcb, Vm_state &state)
@ -389,6 +394,12 @@ struct Vcpu {
utcb.write_tpr(state.tpr.value());
utcb.write_tpr_threshold(state.tpr_threshold.value());
}
if (state.fpu.valid()) {
state.fpu.value([&] (uint8_t *fpu, size_t const) {
asm volatile ("fxrstor %0" : : "m" (*fpu));
});
}
}
void _dispatch()
@ -655,7 +666,8 @@ struct Vcpu {
if (state.qual_primary.valid() || state.qual_secondary.valid())
mtd |= Nova::Mtd::QUAL;
/* XXX FPU missing */
if (state.fpu.valid())
mtd |= Nova::Mtd::FPU;
state = Vm_state {};