int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
{
int nr = kvmppc_get_gpr(vcpu, 11);
int r;
unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
unsigned long r2 = 0;
if (!(vcpu->arch.shared->msr & MSR_SF)) {
/* 32 bit mode */
param1 &= 0xffffffff;
param2 &= 0xffffffff;
param3 &= 0xffffffff;
param4 &= 0xffffffff;
}
switch (nr) {
case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
{
vcpu->arch.magic_page_pa = param1;
vcpu->arch.magic_page_ea = param2;
r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
r = EV_SUCCESS;
break;
}
case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
r = EV_SUCCESS;
#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
/* XXX Missing magic page on 44x */
r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif
/* Second return value is in r4 */
break;
case EV_HCALL_TOKEN(EV_IDLE):
r = EV_SUCCESS;
kvm_vcpu_block(vcpu);
clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
break;
default:
r = EV_UNIMPLEMENTED;
break;
}
kvmppc_set_gpr(vcpu, 4, r2);
return r;
}
static void kvm_map_magic_page(void *data)
{
u32 *features = data;
ulong in[8] = {0};
ulong out[8];
in[0] = KVM_MAGIC_PAGE;
in[1] = KVM_MAGIC_PAGE | MAGIC_PAGE_FLAG_NOT_MAPPED_NX;
epapr_hypercall(in, out, KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE));
*features = out[0];
}
int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
{
int nr = kvmppc_get_gpr(vcpu, 11);
int r;
unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
unsigned long r2 = 0;
if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
/* 32 bit mode */
param1 &= 0xffffffff;
param2 &= 0xffffffff;
param3 &= 0xffffffff;
param4 &= 0xffffffff;
}
switch (nr) {
case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
{
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
/* Book3S can be little endian, find it out here */
int shared_big_endian = true;
if (vcpu->arch.intr_msr & MSR_LE)
shared_big_endian = false;
if (shared_big_endian != vcpu->arch.shared_big_endian)
kvmppc_swab_shared(vcpu);
vcpu->arch.shared_big_endian = shared_big_endian;
#endif
if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
/*
* Older versions of the Linux magic page code had
* a bug where they would map their trampoline code
* NX. If that's the case, remove !PR NX capability.
*/
vcpu->arch.disable_kernel_nx = true;
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
}
vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
#ifdef CONFIG_PPC_64K_PAGES
/*
* Make sure our 4k magic page is in the same window of a 64k
* page within the guest and within the host's page.
*/
if ((vcpu->arch.magic_page_pa & 0xf000) !=
((ulong)vcpu->arch.shared & 0xf000)) {
void *old_shared = vcpu->arch.shared;
ulong shared = (ulong)vcpu->arch.shared;
void *new_shared;
shared &= PAGE_MASK;
shared |= vcpu->arch.magic_page_pa & 0xf000;
new_shared = (void*)shared;
memcpy(new_shared, old_shared, 0x1000);
vcpu->arch.shared = new_shared;
}
#endif
r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
r = EV_SUCCESS;
break;
}
case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
r = EV_SUCCESS;
#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif
/* Second return value is in r4 */
break;
case EV_HCALL_TOKEN(EV_IDLE):
r = EV_SUCCESS;
kvm_vcpu_block(vcpu);
clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
break;
default:
r = EV_UNIMPLEMENTED;
break;
}
kvmppc_set_gpr(vcpu, 4, r2);
return r;
}