[RFC PATCH 3/6] powerpc/pseries: Stop selecting PPC_HASH_MMU_NATIVE

[Nicholas Piggin <npiggin@gmail.com>]

The pseries platform does not use the native hash code but the PAPR
virtualised hash interfaces. Remove PPC_HASH_MMU_NATIVE. This
requires moving some tlbiel code from hash_native.c to hash_utils.c.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/include/asm/book3s/64/tlbflush.h |   4 -
 arch/powerpc/mm/book3s64/hash_native.c        | 104 ------------------
 arch/powerpc/mm/book3s64/hash_utils.c         | 104 ++++++++++++++++++
 arch/powerpc/platforms/pseries/Kconfig        |   1 -
 4 files changed, 104 insertions(+), 109 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush.h b/arch/powerpc/include/asm/book3s/64/tlbflush.h
index 215973b4cb26..d2e80f178b6d 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush.h
@@ -14,7 +14,6 @@ enum {
 	TLB_INVAL_SCOPE_LPID = 1,	/* invalidate TLBs for current LPID */
 };
 
-#ifdef CONFIG_PPC_NATIVE
 static inline void tlbiel_all(void)
 {
 	/*
@@ -30,9 +29,6 @@ static inline void tlbiel_all(void)
 	else
 		hash__tlbiel_all(TLB_INVAL_SCOPE_GLOBAL);
 }
-#else
-static inline void tlbiel_all(void) { BUG(); }
-#endif
 
 static inline void tlbiel_all_lpid(bool radix)
 {
diff --git a/arch/powerpc/mm/book3s64/hash_native.c b/arch/powerpc/mm/book3s64/hash_native.c
index 52e170bd95ae..83afd08351f1 100644
--- a/arch/powerpc/mm/book3s64/hash_native.c
+++ b/arch/powerpc/mm/book3s64/hash_native.c
@@ -43,110 +43,6 @@
 
 static DEFINE_RAW_SPINLOCK(native_tlbie_lock);
 
-static inline void tlbiel_hash_set_isa206(unsigned int set, unsigned int is)
-{
-	unsigned long rb;
-
-	rb = (set << PPC_BITLSHIFT(51)) | (is << PPC_BITLSHIFT(53));
-
-	asm volatile("tlbiel %0" : : "r" (rb));
-}
-
-/*
- * tlbiel instruction for hash, set invalidation
- * i.e., r=1 and is=01 or is=10 or is=11
- */
-static __always_inline void tlbiel_hash_set_isa300(unsigned int set, unsigned int is,
-					unsigned int pid,
-					unsigned int ric, unsigned int prs)
-{
-	unsigned long rb;
-	unsigned long rs;
-	unsigned int r = 0; /* hash format */
-
-	rb = (set << PPC_BITLSHIFT(51)) | (is << PPC_BITLSHIFT(53));
-	rs = ((unsigned long)pid << PPC_BITLSHIFT(31));
-
-	asm volatile(PPC_TLBIEL(%0, %1, %2, %3, %4)
-		     : : "r"(rb), "r"(rs), "i"(ric), "i"(prs), "i"(r)
-		     : "memory");
-}
-
-
-static void tlbiel_all_isa206(unsigned int num_sets, unsigned int is)
-{
-	unsigned int set;
-
-	asm volatile("ptesync": : :"memory");
-
-	for (set = 0; set < num_sets; set++)
-		tlbiel_hash_set_isa206(set, is);
-
-	ppc_after_tlbiel_barrier();
-}
-
-static void tlbiel_all_isa300(unsigned int num_sets, unsigned int is)
-{
-	unsigned int set;
-
-	asm volatile("ptesync": : :"memory");
-
-	/*
-	 * Flush the partition table cache if this is HV mode.
-	 */
-	if (early_cpu_has_feature(CPU_FTR_HVMODE))
-		tlbiel_hash_set_isa300(0, is, 0, 2, 0);
-
-	/*
-	 * Now invalidate the process table cache. UPRT=0 HPT modes (what
-	 * current hardware implements) do not use the process table, but
-	 * add the flushes anyway.
-	 *
-	 * From ISA v3.0B p. 1078:
-	 *     The following forms are invalid.
-	 *      * PRS=1, R=0, and RIC!=2 (The only process-scoped
-	 *        HPT caching is of the Process Table.)
-	 */
-	tlbiel_hash_set_isa300(0, is, 0, 2, 1);
-
-	/*
-	 * Then flush the sets of the TLB proper. Hash mode uses
-	 * partition scoped TLB translations, which may be flushed
-	 * in !HV mode.
-	 */
-	for (set = 0; set < num_sets; set++)
-		tlbiel_hash_set_isa300(set, is, 0, 0, 0);
-
-	ppc_after_tlbiel_barrier();
-
-	asm volatile(PPC_ISA_3_0_INVALIDATE_ERAT "; isync" : : :"memory");
-}
-
-void hash__tlbiel_all(unsigned int action)
-{
-	unsigned int is;
-
-	switch (action) {
-	case TLB_INVAL_SCOPE_GLOBAL:
-		is = 3;
-		break;
-	case TLB_INVAL_SCOPE_LPID:
-		is = 2;
-		break;
-	default:
-		BUG();
-	}
-
-	if (early_cpu_has_feature(CPU_FTR_ARCH_300))
-		tlbiel_all_isa300(POWER9_TLB_SETS_HASH, is);
-	else if (early_cpu_has_feature(CPU_FTR_ARCH_207S))
-		tlbiel_all_isa206(POWER8_TLB_SETS, is);
-	else if (early_cpu_has_feature(CPU_FTR_ARCH_206))
-		tlbiel_all_isa206(POWER7_TLB_SETS, is);
-	else
-		WARN(1, "%s called on pre-POWER7 CPU\n", __func__);
-}
-
 static inline unsigned long  ___tlbie(unsigned long vpn, int psize,
 						int apsize, int ssize)
 {
diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index e35faefa8e59..43c05cdbba73 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -175,6 +175,110 @@ static struct mmu_psize_def mmu_psize_defaults_gp[] = {
 	},
 };
 
+static inline void tlbiel_hash_set_isa206(unsigned int set, unsigned int is)
+{
+	unsigned long rb;
+
+	rb = (set << PPC_BITLSHIFT(51)) | (is << PPC_BITLSHIFT(53));
+
+	asm volatile("tlbiel %0" : : "r" (rb));
+}
+
+/*
+ * tlbiel instruction for hash, set invalidation
+ * i.e., r=1 and is=01 or is=10 or is=11
+ */
+static __always_inline void tlbiel_hash_set_isa300(unsigned int set, unsigned int is,
+					unsigned int pid,
+					unsigned int ric, unsigned int prs)
+{
+	unsigned long rb;
+	unsigned long rs;
+	unsigned int r = 0; /* hash format */
+
+	rb = (set << PPC_BITLSHIFT(51)) | (is << PPC_BITLSHIFT(53));
+	rs = ((unsigned long)pid << PPC_BITLSHIFT(31));
+
+	asm volatile(PPC_TLBIEL(%0, %1, %2, %3, %4)
+		     : : "r"(rb), "r"(rs), "i"(ric), "i"(prs), "i"(r)
+		     : "memory");
+}
+
+
+static void tlbiel_all_isa206(unsigned int num_sets, unsigned int is)
+{
+	unsigned int set;
+
+	asm volatile("ptesync": : :"memory");
+
+	for (set = 0; set < num_sets; set++)
+		tlbiel_hash_set_isa206(set, is);
+
+	ppc_after_tlbiel_barrier();
+}
+
+static void tlbiel_all_isa300(unsigned int num_sets, unsigned int is)
+{
+	unsigned int set;
+
+	asm volatile("ptesync": : :"memory");
+
+	/*
+	 * Flush the partition table cache if this is HV mode.
+	 */
+	if (early_cpu_has_feature(CPU_FTR_HVMODE))
+		tlbiel_hash_set_isa300(0, is, 0, 2, 0);
+
+	/*
+	 * Now invalidate the process table cache. UPRT=0 HPT modes (what
+	 * current hardware implements) do not use the process table, but
+	 * add the flushes anyway.
+	 *
+	 * From ISA v3.0B p. 1078:
+	 *     The following forms are invalid.
+	 *      * PRS=1, R=0, and RIC!=2 (The only process-scoped
+	 *        HPT caching is of the Process Table.)
+	 */
+	tlbiel_hash_set_isa300(0, is, 0, 2, 1);
+
+	/*
+	 * Then flush the sets of the TLB proper. Hash mode uses
+	 * partition scoped TLB translations, which may be flushed
+	 * in !HV mode.
+	 */
+	for (set = 0; set < num_sets; set++)
+		tlbiel_hash_set_isa300(set, is, 0, 0, 0);
+
+	ppc_after_tlbiel_barrier();
+
+	asm volatile(PPC_ISA_3_0_INVALIDATE_ERAT "; isync" : : :"memory");
+}
+
+void hash__tlbiel_all(unsigned int action)
+{
+	unsigned int is;
+
+	switch (action) {
+	case TLB_INVAL_SCOPE_GLOBAL:
+		is = 3;
+		break;
+	case TLB_INVAL_SCOPE_LPID:
+		is = 2;
+		break;
+	default:
+		BUG();
+	}
+
+	if (early_cpu_has_feature(CPU_FTR_ARCH_300))
+		tlbiel_all_isa300(POWER9_TLB_SETS_HASH, is);
+	else if (early_cpu_has_feature(CPU_FTR_ARCH_207S))
+		tlbiel_all_isa206(POWER8_TLB_SETS, is);
+	else if (early_cpu_has_feature(CPU_FTR_ARCH_206))
+		tlbiel_all_isa206(POWER7_TLB_SETS, is);
+	else
+		WARN(1, "%s called on pre-POWER7 CPU\n", __func__);
+}
+
 /*
  * 'R' and 'C' update notes:
  *  - Under pHyp or KVM, the updatepp path will not set C, thus it *will*
diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index 69a1ff8c079b..98ab9697ab5e 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -17,7 +17,6 @@ config PPC_PSERIES
 	select PPC_RTAS_DAEMON
 	select RTAS_ERROR_LOGGING
 	select PPC_UDBG_16550
-	select PPC_HASH_MMU_NATIVE
 	select PPC_DOORBELL
 	select HOTPLUG_CPU
 	select ARCH_RANDOM
-- 
2.23.0