From 45024f094c223e8096f366520414cdf1a74dbff3 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Tue, 3 Aug 2010 15:22:42 +0200 Subject: PPC: Add PV hypercall transport through fw_cfg On KVM for PPC we need to tell the guest which instructions to use when doing a hypercall. The clean way to do this is to go through an ioctl from userspace and passing it on to the guest using the device tree. So let's do the qemu part here: read out the hypercall and pass it on to the guest's fw_cfg so openBIOS can read it out and expose it again. Signed-off-by: Alexander Graf --- target-ppc/kvm.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'target-ppc/kvm.c') diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 1079ce1e61..14d6365ee2 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -327,6 +327,38 @@ uint32_t kvmppc_get_tbfreq(void) return retval; } +int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len) +{ + uint32_t *hc = (uint32_t*)buf; + +#ifdef KVM_CAP_PPC_GET_PVINFO + struct kvm_ppc_pvinfo pvinfo; + + if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_PVINFO) && + !kvm_vm_ioctl(env->kvm_state, KVM_PPC_GET_PVINFO, &pvinfo)) { + memcpy(buf, pvinfo.hcall, buf_len); + + return 0; + } +#endif + + /* + * Fallback to always fail hypercalls: + * + * li r3, -1 + * nop + * nop + * nop + */ + + hc[0] = 0x3860ffff; + hc[1] = 0x60000000; + hc[2] = 0x60000000; + hc[3] = 0x60000000; + + return 0; +} + bool kvm_arch_stop_on_emulation_error(CPUState *env) { return true; -- cgit v1.2.3