diff options
| -rw-r--r-- | target/i386/kvm/xen-emu.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index 75bcf7b..d2c88ef 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -765,6 +765,42 @@ out: return true; } +static bool handle_get_param(struct kvm_xen_exit *exit, X86CPU *cpu, + uint64_t arg) +{ + CPUState *cs = CPU(cpu); + struct xen_hvm_param hp; + int err = 0; + + /* No need for 32/64 compat handling */ + qemu_build_assert(sizeof(hp) == 16); + + if (kvm_copy_from_gva(cs, arg, &hp, sizeof(hp))) { + err = -EFAULT; + goto out; + } + + if (hp.domid != DOMID_SELF && hp.domid != xen_domid) { + err = -ESRCH; + goto out; + } + + switch (hp.index) { + case HVM_PARAM_STORE_PFN: + hp.value = XEN_SPECIAL_PFN(XENSTORE); + break; + default: + return false; + } + + if (kvm_copy_to_gva(cs, arg, &hp, sizeof(hp))) { + err = -EFAULT; + } +out: + exit->u.hcall.result = err; + return true; +} + static int kvm_xen_hcall_evtchn_upcall_vector(struct kvm_xen_exit *exit, X86CPU *cpu, uint64_t arg) { @@ -809,6 +845,9 @@ static bool kvm_xen_hcall_hvm_op(struct kvm_xen_exit *exit, X86CPU *cpu, case HVMOP_set_param: return handle_set_param(exit, cpu, arg); + case HVMOP_get_param: + return handle_get_param(exit, cpu, arg); + default: return false; } |