diff options
Diffstat (limited to 'src/cpu/kvm/arm_cpu.cc')
-rw-r--r-- | src/cpu/kvm/arm_cpu.cc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/cpu/kvm/arm_cpu.cc b/src/cpu/kvm/arm_cpu.cc index d1082c53e..e131202a4 100644 --- a/src/cpu/kvm/arm_cpu.cc +++ b/src/cpu/kvm/arm_cpu.cc @@ -49,6 +49,7 @@ #include "debug/Kvm.hh" #include "debug/KvmContext.hh" #include "debug/KvmInt.hh" +#include "sim/pseudo_inst.hh" using namespace ArmISA; @@ -310,6 +311,26 @@ ArmKvmCPU::updateThreadContext() updateTCStateMisc(); } +Tick +ArmKvmCPU::onKvmExitHypercall() +{ + ThreadContext *tc(getContext(0)); + const uint32_t reg_ip(tc->readIntRegFlat(INTREG_R12)); + const uint8_t func((reg_ip >> 8) & 0xFF); + const uint8_t subfunc(reg_ip & 0xFF); + + DPRINTF(Kvm, "KVM Hypercall: 0x%x/0x%x\n", func, subfunc); + const uint64_t ret(PseudoInst::pseudoInst(getContext(0), func, subfunc)); + + // Just set the return value using the KVM API instead of messing + // with the context. We could have used the context, but that + // would have required us to request a full context sync. + setOneReg(REG_CORE32(usr_regs.ARM_r0), ret & 0xFFFFFFFF); + setOneReg(REG_CORE32(usr_regs.ARM_r1), (ret >> 32) & 0xFFFFFFFF); + + return 0; +} + const ArmKvmCPU::RegIndexVector & ArmKvmCPU::getRegList() const { |