Merge branch 'for-next/pkvm-guest' into for-next/core

* for-next/pkvm-guest:
  arm64: smccc: Reserve block of KVM "vendor" services for pKVM hypercalls
  drivers/virt: pkvm: Intercept ioremap using pKVM MMIO_GUARD hypercall
  arm64: mm: Add confidential computing hook to ioremap_prot()
  drivers/virt: pkvm: Hook up mem_encrypt API using pKVM hypercalls
  arm64: mm: Add top-level dispatcher for internal mem_encrypt API
  drivers/virt: pkvm: Add initial support for running as a protected guest
  firmware/smccc: Call arch-specific hook on discovering KVM services

4 files changed, 31 insertions, 0 deletions

diff --git a/arch/arm64/include/asm/hypervisor.h b/arch/arm64/include/asm/hypervisor.h
index 0ae427f352c8..409e239834d1 100644
--- a/arch/arm64/include/asm/hypervisor.h
+++ b/arch/arm64/include/asm/hypervisor.h
@@ -7,4 +7,15 @@
 void kvm_init_hyp_services(void);
 bool kvm_arm_hyp_service_available(u32 func_id);
 
+#ifdef CONFIG_ARM_PKVM_GUEST
+void pkvm_init_hyp_services(void);
+#else
+static inline void pkvm_init_hyp_services(void) { };
+#endif
+
+static inline void kvm_arch_init_hyp_services(void)
+{
+	pkvm_init_hyp_services();
+};
+
 #endif
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 41fd90895dfc..1ada23a6ec19 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -271,6 +271,10 @@ __iowrite64_copy(void __iomem *to, const void *from, size_t count)
  * I/O memory mapping functions.
  */
 
+typedef int (*ioremap_prot_hook_t)(phys_addr_t phys_addr, size_t size,
+				   pgprot_t *prot);
+int arm64_ioremap_prot_hook_register(const ioremap_prot_hook_t hook);
+
 #define ioremap_prot ioremap_prot
 
 #define _PAGE_IOREMAP PROT_DEVICE_nGnRE
diff --git a/arch/arm64/include/asm/mem_encrypt.h b/arch/arm64/include/asm/mem_encrypt.h
new file mode 100644
index 000000000000..b0c9a86b13a4
--- /dev/null
+++ b/arch/arm64/include/asm/mem_encrypt.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_MEM_ENCRYPT_H
+#define __ASM_MEM_ENCRYPT_H
+
+struct arm64_mem_crypt_ops {
+	int (*encrypt)(unsigned long addr, int numpages);
+	int (*decrypt)(unsigned long addr, int numpages);
+};
+
+int arm64_mem_crypt_ops_register(const struct arm64_mem_crypt_ops *ops);
+
+int set_memory_encrypted(unsigned long addr, int numpages);
+int set_memory_decrypted(unsigned long addr, int numpages);
+
+#endif	/* __ASM_MEM_ENCRYPT_H */
diff --git a/arch/arm64/include/asm/set_memory.h b/arch/arm64/include/asm/set_memory.h
index 0f740b781187..917761feeffd 100644
--- a/arch/arm64/include/asm/set_memory.h
+++ b/arch/arm64/include/asm/set_memory.h
@@ -3,6 +3,7 @@
 #ifndef _ASM_ARM64_SET_MEMORY_H
 #define _ASM_ARM64_SET_MEMORY_H
 
+#include <asm/mem_encrypt.h>
 #include <asm-generic/set_memory.h>
 
 bool can_set_direct_map(void);