[Qemu-devel] [RFC PATCH v2 07/12] target-ppc: support KVM_CAP_PPC_MMU_RADIX, KVM_CAP_PPC_MMU_HASH_V3

[Sam Bobroff]

Query and cache the value of two new KVM capabilities that indicate
KVM's support for new radix and hash modes of the MMU.

Signed-off-by: Sam Bobroff <sam.bobr...@au1.ibm.com>
---
v2:

* cap_mmu_hash renamed to cap_mmu_hash_v3.

 target/ppc/kvm.c     | 14 ++++++++++++++
 target/ppc/kvm_ppc.h | 12 ++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index cf62a42c1f..8b153808fd 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -83,6 +83,8 @@ static int cap_papr;
 static int cap_htab_fd;
 static int cap_fixup_hcalls;
 static int cap_htm;             /* Hardware transactional memory support */
+static int cap_mmu_radix;
+static int cap_mmu_hash_v3;
 
 static uint32_t debug_inst_opcode;
 
@@ -136,6 +138,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
     cap_htab_fd = kvm_check_extension(s, KVM_CAP_PPC_HTAB_FD);
     cap_fixup_hcalls = kvm_check_extension(s, KVM_CAP_PPC_FIXUP_HCALL);
     cap_htm = kvm_vm_check_extension(s, KVM_CAP_PPC_HTM);
+    cap_mmu_radix = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_RADIX);
+    cap_mmu_hash_v3 = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_HASH_V3);
 
     if (!cap_interrupt_level) {
         fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the "
@@ -2430,6 +2434,16 @@ bool kvmppc_has_cap_htm(void)
     return cap_htm;
 }
 
+bool kvmppc_has_cap_mmu_radix(void)
+{
+    return cap_mmu_radix;
+}
+
+bool kvmppc_has_cap_mmu_hash_v3(void)
+{
+    return cap_mmu_hash_v3;
+}
+
 static PowerPCCPUClass *ppc_cpu_get_family_class(PowerPCCPUClass *pcc)
 {
     ObjectClass *oc = OBJECT_CLASS(pcc);
diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h
index 8da2ee418a..56e222dfc2 100644
--- a/target/ppc/kvm_ppc.h
+++ b/target/ppc/kvm_ppc.h
@@ -56,6 +56,8 @@ void kvmppc_hash64_write_pte(CPUPPCState *env, target_ulong 
pte_index,
                              target_ulong pte0, target_ulong pte1);
 bool kvmppc_has_cap_fixup_hcalls(void);
 bool kvmppc_has_cap_htm(void);
+bool kvmppc_has_cap_mmu_radix(void);
+bool kvmppc_has_cap_mmu_hash_v3(void);
 int kvmppc_enable_hwrng(void);
 int kvmppc_put_books_sregs(PowerPCCPU *cpu);
 PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void);
@@ -262,6 +264,16 @@ static inline bool kvmppc_has_cap_htm(void)
     return false;
 }
 
+static inline bool kvmppc_has_cap_mmu_radix(void)
+{
+    return false;
+}
+
+static inline bool kvmppc_has_cap_mmu_hash_v3(void)
+{
+    return false;
+}
+
 static inline int kvmppc_enable_hwrng(void)
 {
     return -1;
-- 
2.11.0