Move x86's 'struct kvm_mmu_memory_cache' to common code in anticipation
of moving the entire x86 implementation code to common KVM and reusing
it for arm64 and MIPS.  Add a new architecture specific asm/kvm_types.h
to control the existence and parameters of the struct.  The new header
is needed to avoid a chicken-and-egg problem with asm/kvm_host.h as all
architectures define instances of the struct in their vCPU structs.

Suggested-by: Christoffer Dall <redacted>
Signed-off-by: Sean Christopherson <redacted>
---
 arch/arm64/include/asm/kvm_types.h   |  6 ++++++
 arch/mips/include/asm/kvm_types.h    |  5 +++++
 arch/powerpc/include/asm/kvm_types.h |  5 +++++
 arch/s390/include/asm/kvm_types.h    |  5 +++++
 arch/x86/include/asm/kvm_host.h      | 13 -------------
 arch/x86/include/asm/kvm_types.h     |  7 +++++++
 include/linux/kvm_types.h            | 19 +++++++++++++++++++
 7 files changed, 47 insertions(+), 13 deletions(-)
 create mode 100644 arch/arm64/include/asm/kvm_types.h
 create mode 100644 arch/mips/include/asm/kvm_types.h
 create mode 100644 arch/powerpc/include/asm/kvm_types.h
 create mode 100644 arch/s390/include/asm/kvm_types.h
 create mode 100644 arch/x86/include/asm/kvm_types.h

diff --git a/arch/arm64/include/asm/kvm_types.h

b/arch/arm64/include/asm/kvm_types.h
new file mode 100644
index 000000000000..d0987007d581

--- /dev/null
+++ b/arch/arm64/include/asm/kvm_types.h

@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_ARM64_KVM_TYPES_H
+#define _ASM_ARM64_KVM_TYPES_H
+
+#endif /* _ASM_ARM64_KVM_TYPES_H */
+

diff --git a/arch/mips/include/asm/kvm_types.h

b/arch/mips/include/asm/kvm_types.h
new file mode 100644
index 000000000000..5efeb32a5926

--- /dev/null
+++ b/arch/mips/include/asm/kvm_types.h

@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_MIPS_KVM_TYPES_H
+#define _ASM_MIPS_KVM_TYPES_H
+
+#endif /* _ASM_MIPS_KVM_TYPES_H */

diff --git a/arch/powerpc/include/asm/kvm_types.h

b/arch/powerpc/include/asm/kvm_types.h
new file mode 100644
index 000000000000..f627eceaa314

--- /dev/null
+++ b/arch/powerpc/include/asm/kvm_types.h

@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_KVM_TYPES_H
+#define _ASM_POWERPC_KVM_TYPES_H
+
+#endif /* _ASM_POWERPC_KVM_TYPES_H */

diff --git a/arch/s390/include/asm/kvm_types.h

b/arch/s390/include/asm/kvm_types.h
new file mode 100644
index 000000000000..b66a81f8a354

--- /dev/null
+++ b/arch/s390/include/asm/kvm_types.h

@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_S390_KVM_TYPES_H
+#define _ASM_S390_KVM_TYPES_H
+
+#endif /* _ASM_S390_KVM_TYPES_H */