diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 27afb64d027c..1fa336ec8faf 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -845,7 +845,7 @@ config FORCE_MAX_ZONEORDER
 config PPC_SUBPAGE_PROT
 	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
 	default n
-	depends on PPC_BOOK3S_64 && PPC_64K_PAGES
+	depends on PPC_64S_HASH_MMU && PPC_64K_PAGES
 	help
 	  This option adds support for system call to allow user programs
 	  to set access permissions (read/write, readonly, or no access)
@@ -943,6 +943,7 @@ config PPC_MEM_KEYS
 	prompt "PowerPC Memory Protection Keys"
 	def_bool y
 	depends on PPC_BOOK3S_64
+	depends on PPC_64S_HASH_MMU
 	select ARCH_USES_HIGH_VMA_FLAGS
 	select ARCH_HAS_PKEYS
 	help
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 8abe8e42e045..5f41565a1e5d 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -157,7 +157,7 @@ DECLARE_PER_CPU(int, next_tlbcam_idx);
 
 enum {
 	MMU_FTRS_POSSIBLE =
-#if defined(CONFIG_PPC_BOOK3S_64) || defined(CONFIG_PPC_BOOK3S_604)
+#if defined(CONFIG_PPC_BOOK3S_604)
 		MMU_FTR_HPTE_TABLE |
 #endif
 #ifdef CONFIG_PPC_8xx
@@ -184,15 +184,18 @@ enum {
 		MMU_FTR_USE_TLBRSRV | MMU_FTR_USE_PAIRED_MAS |
 #endif
 #ifdef CONFIG_PPC_BOOK3S_64
+		MMU_FTR_KERNEL_RO |
+#ifdef CONFIG_PPC_64S_HASH_MMU
 		MMU_FTR_NO_SLBIE_B | MMU_FTR_16M_PAGE | MMU_FTR_TLBIEL |
 		MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_CI_LARGE_PAGE |
 		MMU_FTR_1T_SEGMENT | MMU_FTR_TLBIE_CROP_VA |
-		MMU_FTR_KERNEL_RO | MMU_FTR_68_BIT_VA |
+		MMU_FTR_68_BIT_VA | MMU_FTR_HPTE_TABLE |
 #endif
 #ifdef CONFIG_PPC_RADIX_MMU
 		MMU_FTR_TYPE_RADIX |
 		MMU_FTR_GTSE |
 #endif /* CONFIG_PPC_RADIX_MMU */
+#endif
 #ifdef CONFIG_PPC_KUAP
 	MMU_FTR_BOOK3S_KUAP |
 #endif /* CONFIG_PPC_KUAP */
@@ -224,6 +227,13 @@ enum {
 #define MMU_FTRS_ALWAYS		MMU_FTR_TYPE_FSL_E
 #endif
 
+/* BOOK3S_64 options */
+#if defined(CONFIG_PPC_RADIX_MMU) && !defined(CONFIG_PPC_64S_HASH_MMU)
+#define MMU_FTRS_ALWAYS		MMU_FTR_TYPE_RADIX
+#elif !defined(CONFIG_PPC_RADIX_MMU) && defined(CONFIG_PPC_64S_HASH_MMU)
+#define MMU_FTRS_ALWAYS		MMU_FTR_HPTE_TABLE
+#endif
+
 #ifndef MMU_FTRS_ALWAYS
 #define MMU_FTRS_ALWAYS		0
 #endif
@@ -329,7 +339,7 @@ static __always_inline bool radix_enabled(void)
 	return mmu_has_feature(MMU_FTR_TYPE_RADIX);
 }
 
-static inline bool early_radix_enabled(void)
+static __always_inline bool early_radix_enabled(void)
 {
 	return early_mmu_has_feature(MMU_FTR_TYPE_RADIX);
 }
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index d2b35fb9181d..1ac8d7357195 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -273,6 +273,9 @@ static int __init feat_enable_mmu_hash(struct dt_cpu_feature *f)
 {
 	u64 lpcr;
 
+	if (!IS_ENABLED(CONFIG_PPC_64S_HASH_MMU))
+		return 0;
+
 	lpcr = mfspr(SPRN_LPCR);
 	lpcr &= ~LPCR_ISL;
 
@@ -292,6 +295,9 @@ static int __init feat_enable_mmu_hash_v3(struct dt_cpu_feature *f)
 {
 	u64 lpcr;
 
+	if (!IS_ENABLED(CONFIG_PPC_64S_HASH_MMU))
+		return 0;
+
 	lpcr = mfspr(SPRN_LPCR);
 	lpcr &= ~(LPCR_ISL | LPCR_UPRT | LPCR_HR);
 	mtspr(SPRN_LPCR, lpcr);
@@ -305,15 +311,15 @@ static int __init feat_enable_mmu_hash_v3(struct dt_cpu_feature *f)
 
 static int __init feat_enable_mmu_radix(struct dt_cpu_feature *f)
 {
-#ifdef CONFIG_PPC_RADIX_MMU
+	if (!IS_ENABLED(CONFIG_PPC_RADIX_MMU))
+		return 0;
+
+	cur_cpu_spec->mmu_features |= MMU_FTR_KERNEL_RO;
 	cur_cpu_spec->mmu_features |= MMU_FTR_TYPE_RADIX;
-	cur_cpu_spec->mmu_features |= MMU_FTRS_HASH_BASE;
 	cur_cpu_spec->mmu_features |= MMU_FTR_GTSE;
 	cur_cpu_spec->cpu_user_features |= PPC_FEATURE_HAS_MMU;
 
 	return 1;
-#endif
-	return 0;
 }
 
 static int __init feat_enable_dscr(struct dt_cpu_feature *f)
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 6a58532300c5..f947b77386a9 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -69,6 +69,7 @@ config KVM_BOOK3S_64
 	select KVM_BOOK3S_64_HANDLER
 	select KVM
 	select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE
+	select PPC_64S_HASH_MMU
 	select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV)
 	help
 	  Support running unmodified book3s_64 and book3s_32 guest kernels
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 386be136026e..e6876e702d8f 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -440,8 +440,12 @@ static void __init early_check_vec5(void)
 void __init mmu_early_init_devtree(void)
 {
 	/* Disable radix mode based on kernel command line. */
-	if (disable_radix)
-		cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX;
+	if (disable_radix) {
+		if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU))
+			cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX;
+		else
+			pr_warn("WARNING: Ignoring cmdline option disable_radix\n");
+	}
 
 	/*
 	 * Check /chosen/ibm,architecture-vec-5 if running as a guest.
@@ -454,6 +458,7 @@ void __init mmu_early_init_devtree(void)
 
 	if (early_radix_enabled()) {
 		radix__early_init_devtree();
+
 		/*
 		 * We have finalized the translation we are going to use by now.
 		 * Radix mode is not limited by RMA / VRMA addressing.
@@ -463,5 +468,9 @@ void __init mmu_early_init_devtree(void)
 		memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE);
 	} else
 		hash__early_init_devtree();
+
+	if (!(cur_cpu_spec->mmu_features & MMU_FTR_HPTE_TABLE) &&
+	    !(cur_cpu_spec->mmu_features & MMU_FTR_TYPE_RADIX))
+		panic("kernel does not support any MMU type offered by platform");
 }
 #endif /* CONFIG_PPC_BOOK3S_64 */
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index a208997ade88..7ca07df1c374 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -105,9 +105,9 @@ config PPC_BOOK3S_64
 	select HAVE_MOVE_PMD
 	select HAVE_MOVE_PUD
 	select IRQ_WORK
-	select PPC_MM_SLICES
 	select PPC_HAVE_KUEP
 	select PPC_HAVE_KUAP
+	select PPC_64S_HASH_MMU if !PPC_RADIX_MMU
 
 config PPC_BOOK3E_64
 	bool "Embedded processors"
@@ -130,11 +130,13 @@ choice
 config GENERIC_CPU
 	bool "Generic (POWER4 and above)"
 	depends on PPC64 && !CPU_LITTLE_ENDIAN
+	select PPC_64S_HASH_MMU if PPC_BOOK3S_64
 
 config GENERIC_CPU
 	bool "Generic (POWER8 and above)"
 	depends on PPC64 && CPU_LITTLE_ENDIAN
 	select ARCH_HAS_FAST_MULTIPLIER
+	select PPC_64S_HASH_MMU
 
 config GENERIC_CPU
 	bool "Generic 32 bits powerpc"
@@ -143,24 +145,29 @@ config GENERIC_CPU
 config CELL_CPU
 	bool "Cell Broadband Engine"
 	depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
+	select PPC_64S_HASH_MMU
 
 config POWER5_CPU
 	bool "POWER5"
 	depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
+	select PPC_64S_HASH_MMU
 
 config POWER6_CPU
 	bool "POWER6"
 	depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
+	select PPC_64S_HASH_MMU
 
 config POWER7_CPU
 	bool "POWER7"
 	depends on PPC_BOOK3S_64
 	select ARCH_HAS_FAST_MULTIPLIER
+	select PPC_64S_HASH_MMU
 
 config POWER8_CPU
 	bool "POWER8"
 	depends on PPC_BOOK3S_64
 	select ARCH_HAS_FAST_MULTIPLIER
+	select PPC_64S_HASH_MMU
 
 config POWER9_CPU
 	bool "POWER9"
@@ -364,6 +371,22 @@ config SPE
 
 	  If in doubt, say Y here.
 
+config PPC_64S_HASH_MMU
+	bool "Hash MMU Support"
+	depends on PPC_BOOK3S_64
+	select PPC_MM_SLICES
+	default y
+	help
+	  Enable support for the Power ISA Hash style MMU. This is implemented
+	  by all IBM Power and other 64-bit Book3S CPUs before ISA v3.0. The
+	  OpenPOWER ISA does not mandate the hash MMU and some CPUs do not
+	  implement it (e.g., Microwatt).
+
+	  Note that POWER9 PowerVM platforms only support the hash
+	  MMU. From POWER10 radix is also supported by PowerVM.
+
+	  If you're unsure, say Y.
+
 config PPC_RADIX_MMU
 	bool "Radix MMU Support"
 	depends on PPC_BOOK3S_64
@@ -375,7 +398,8 @@ config PPC_RADIX_MMU
 	  you can probably disable this.
 
 config PPC_RADIX_MMU_DEFAULT
-	bool "Default to using the Radix MMU when possible"
+	bool "Default to using the Radix MMU when possible" if PPC_64S_HASH_MMU
+	depends on PPC_BOOK3S_64
 	depends on PPC_RADIX_MMU
 	default y
 	help
diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
index db4465c51b56..34669b060f36 100644
--- a/arch/powerpc/platforms/cell/Kconfig
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 config PPC_CELL
+	select PPC_64S_HASH_MMU if PPC64
 	bool
 
 config PPC_CELL_COMMON
diff --git a/arch/powerpc/platforms/maple/Kconfig b/arch/powerpc/platforms/maple/Kconfig
index 7fd84311ade5..4c058cc57c90 100644
--- a/arch/powerpc/platforms/maple/Kconfig
+++ b/arch/powerpc/platforms/maple/Kconfig
@@ -9,6 +9,7 @@ config PPC_MAPLE
 	select GENERIC_TBSYNC
 	select PPC_UDBG_16550
 	select PPC_970_NAP
+	select PPC_64S_HASH_MMU
 	select PPC_HASH_MMU_NATIVE
 	select PPC_RTAS
 	select MMIO_NVRAM
diff --git a/arch/powerpc/platforms/microwatt/Kconfig b/arch/powerpc/platforms/microwatt/Kconfig
index 62b51e37fc05..823192e9d38a 100644
--- a/arch/powerpc/platforms/microwatt/Kconfig
+++ b/arch/powerpc/platforms/microwatt/Kconfig
@@ -5,7 +5,7 @@ config PPC_MICROWATT
 	select PPC_XICS
 	select PPC_ICS_NATIVE
 	select PPC_ICP_NATIVE
-	select PPC_HASH_MMU_NATIVE
+	select PPC_HASH_MMU_NATIVE if PPC_64S_HASH_MMU
 	select PPC_UDBG_16550
 	select ARCH_RANDOM
 	help
diff --git a/arch/powerpc/platforms/pasemi/Kconfig b/arch/powerpc/platforms/pasemi/Kconfig
index bc7137353a7f..85ae18ddd911 100644
--- a/arch/powerpc/platforms/pasemi/Kconfig
+++ b/arch/powerpc/platforms/pasemi/Kconfig
@@ -5,6 +5,7 @@ config PPC_PASEMI
 	select MPIC
 	select FORCE_PCI
 	select PPC_UDBG_16550
+	select PPC_64S_HASH_MMU
 	select PPC_HASH_MMU_NATIVE
 	select MPIC_BROKEN_REGREAD
 	help
diff --git a/arch/powerpc/platforms/powermac/Kconfig b/arch/powerpc/platforms/powermac/Kconfig
index 2b56df145b82..130707ec9f99 100644
--- a/arch/powerpc/platforms/powermac/Kconfig
+++ b/arch/powerpc/platforms/powermac/Kconfig
@@ -6,6 +6,7 @@ config PPC_PMAC
 	select FORCE_PCI
 	select PPC_INDIRECT_PCI if PPC32
 	select PPC_MPC106 if PPC32
+	select PPC_64S_HASH_MMU if PPC64
 	select PPC_HASH_MMU_NATIVE
 	select ZONE_DMA if PPC32
 	default y
diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig
index cd754e116184..161dfe024085 100644
--- a/arch/powerpc/platforms/powernv/Kconfig
+++ b/arch/powerpc/platforms/powernv/Kconfig
@@ -2,7 +2,7 @@
 config PPC_POWERNV
 	depends on PPC64 && PPC_BOOK3S
 	bool "IBM PowerNV (Non-Virtualized) platform support"
-	select PPC_HASH_MMU_NATIVE
+	select PPC_HASH_MMU_NATIVE if PPC_64S_HASH_MMU
 	select PPC_XICS
 	select PPC_ICP_NATIVE
 	select PPC_XIVE_NATIVE
diff --git a/drivers/misc/cxl/Kconfig b/drivers/misc/cxl/Kconfig
index 51aecafdcbdf..5efc4151bf58 100644
--- a/drivers/misc/cxl/Kconfig
+++ b/drivers/misc/cxl/Kconfig
@@ -6,6 +6,7 @@
 config CXL_BASE
 	bool
 	select PPC_COPRO_BASE
+	select PPC_64S_HASH_MMU
 
 config CXL
 	tristate "Support for IBM Coherent Accelerators (CXL)"
diff --git a/drivers/misc/lkdtm/Makefile b/drivers/misc/lkdtm/Makefile
index aa12097668d3..83a7baf5df82 100644
--- a/drivers/misc/lkdtm/Makefile
+++ b/drivers/misc/lkdtm/Makefile
@@ -11,7 +11,7 @@ lkdtm-$(CONFIG_LKDTM)		+= usercopy.o
 lkdtm-$(CONFIG_LKDTM)		+= stackleak.o
 lkdtm-$(CONFIG_LKDTM)		+= cfi.o
 lkdtm-$(CONFIG_LKDTM)		+= fortify.o
-lkdtm-$(CONFIG_PPC_BOOK3S_64)	+= powerpc.o
+lkdtm-$(CONFIG_PPC_64S_HASH_MMU)	+= powerpc.o
 
 KASAN_SANITIZE_rodata.o		:= n
 KASAN_SANITIZE_stackleak.o	:= n
