[PATCH v8 2/4] kvm: allow target-specific accelerator properties

[Chenyi Qiang <chenyi.qiang@xxxxxxxxx>]

From: Paolo Bonzini <pbonzini@xxxxxxxxxx>

Several hypervisor capabilities in KVM are target-specific.  When exposed
to QEMU users as accelerator properties (i.e. -accel kvm,prop=value), they
should not be available for all targets.

Add a hook for targets to add their own properties to -accel kvm, for
now no such property is defined.

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 accel/kvm/kvm-all.c    | 2 ++
 include/sysemu/kvm.h   | 2 ++
 target/arm/kvm.c       | 4 ++++
 target/i386/kvm/kvm.c  | 4 ++++
 target/mips/kvm.c      | 4 ++++
 target/ppc/kvm.c       | 4 ++++
 target/riscv/kvm.c     | 4 ++++
 target/s390x/kvm/kvm.c | 4 ++++
 8 files changed, 28 insertions(+)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 5acab1767f..f90c5cb285 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -3737,6 +3737,8 @@ static void kvm_accel_class_init(ObjectClass *oc, void *data)
         NULL, NULL);
     object_class_property_set_description(oc, "dirty-ring-size",
         "Size of KVM dirty page ring buffer (default: 0, i.e. use bitmap)");
+
+    kvm_arch_accel_class_init(oc);
 }
 
 static const TypeInfo kvm_accel_type = {
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index efd6dee818..50868ebf60 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -353,6 +353,8 @@ bool kvm_device_supported(int vmfd, uint64_t type);
 
 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
 
+void kvm_arch_accel_class_init(ObjectClass *oc);
+
 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);
 MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run);
 
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index e5c1bd50d2..d21603cf28 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -1056,3 +1056,7 @@ bool kvm_arch_cpu_check_are_resettable(void)
 {
     return true;
 }
+
+void kvm_arch_accel_class_init(ObjectClass *oc)
+{
+}
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 3838827134..eab09833f9 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -5472,3 +5472,7 @@ void kvm_request_xsave_components(X86CPU *cpu, uint64_t mask)
         mask &= ~BIT_ULL(bit);
     }
 }
+
+void kvm_arch_accel_class_init(ObjectClass *oc)
+{
+}
diff --git a/target/mips/kvm.c b/target/mips/kvm.c
index caf70decd2..bcb8e06b2c 100644
--- a/target/mips/kvm.c
+++ b/target/mips/kvm.c
@@ -1294,3 +1294,7 @@ bool kvm_arch_cpu_check_are_resettable(void)
 {
     return true;
 }
+
+void kvm_arch_accel_class_init(ObjectClass *oc)
+{
+}
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 466d0d2f4c..7c25348b7b 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2966,3 +2966,7 @@ bool kvm_arch_cpu_check_are_resettable(void)
 {
     return true;
 }
+
+void kvm_arch_accel_class_init(ObjectClass *oc)
+{
+}
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 70b4cff06f..30f21453d6 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -532,3 +532,7 @@ bool kvm_arch_cpu_check_are_resettable(void)
 {
     return true;
 }
+
+void kvm_arch_accel_class_init(ObjectClass *oc)
+{
+}
diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c
index 6a8dbadf7e..508c24cfec 100644
--- a/target/s390x/kvm/kvm.c
+++ b/target/s390x/kvm/kvm.c
@@ -2581,3 +2581,7 @@ int kvm_s390_get_zpci_op(void)
 {
     return cap_zpci_op;
 }
+
+void kvm_arch_accel_class_init(ObjectClass *oc)
+{
+}
-- 
2.17.1