Merge tag 'arc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC updates from Vineet Gupta:

 - fixes for -Wmissing-prototype warnings

 - missing compiler barrier in relaxed atomics

 - some uaccess simplification, declutter

 - removal of massive glocal struct cpuinfo_arc from bootlog code

 - __switch_to consolidation (removal of inline asm variant)

 - use GP to cache task pointer (vs. r25)

 - misc rework of entry code

* tag 'arc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (24 commits)
  ARC: boot log: fix warning
  arc: Explicitly include correct DT includes
  ARC: pt_regs: create seperate type for ecr
  ARCv2: entry: rearrange pt_regs slightly
  ARC: entry: replace 8 byte ADD.ne with 4 byte ADD2.ne
  ARC: entry: replace 8 byte OR with 4 byte BSET
  ARC: entry: Add more common chores to EXCEPTION_PROLOGUE
  ARC: entry: EV_MachineCheck dont re-read ECR
  ARC: entry: ARcompact EV_ProtV to use r10 directly
  ARC: entry: rework (non-functional)
  ARC: __switch_to: move ksp to thread_info from thread_struct
  ARC: __switch_to: asm with dwarf ops (vs. inline asm)
  ARC: kernel stack: INIT_THREAD need not setup @init_stack in @ksp
  ARC: entry: use gp to cache task pointer (vs. r25)
  ARC: boot log: eliminate struct cpuinfo_arc #4: boot log per ISA
  ARC: boot log: eliminate struct cpuinfo_arc #3: don't export
  ARC: boot log: eliminate struct cpuinfo_arc #2: cache
  ARC: boot log: eliminate struct cpuinfo_arc #1: mm
  ARCv2: memset: don't prefetch for len == 0 which happens a alot
  ARC: uaccess: elide unaliged handling if hardware supports
  ...

5 files changed, 111 insertions, 186 deletions

diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
index 3c16ee942a5c..f7e05c146637 100644
--- a/arch/arc/mm/cache.c
+++ b/arch/arc/mm/cache.c
@@ -28,6 +28,10 @@ int slc_enable = 1, ioc_enable = 1;
 unsigned long perip_base = ARC_UNCACHED_ADDR_SPACE; /* legacy value for boot */
 unsigned long perip_end = 0xFFFFFFFF; /* legacy value */
 
+static struct cpuinfo_arc_cache {
+	unsigned int sz_k, line_len, colors;
+} ic_info, dc_info, slc_info;
+
 void (*_cache_line_loop_ic_fn)(phys_addr_t paddr, unsigned long vaddr,
 			       unsigned long sz, const int op, const int full_page);
 
@@ -35,78 +39,24 @@ void (*__dma_cache_wback_inv)(phys_addr_t start, unsigned long sz);
 void (*__dma_cache_inv)(phys_addr_t start, unsigned long sz);
 void (*__dma_cache_wback)(phys_addr_t start, unsigned long sz);
 
-char *arc_cache_mumbojumbo(int c, char *buf, int len)
-{
-	int n = 0;
-	struct cpuinfo_arc_cache *p;
-
-#define PR_CACHE(p, cfg, str)						\
-	if (!(p)->line_len)						\
-		n += scnprintf(buf + n, len - n, str"\t\t: N/A\n");	\
-	else								\
-		n += scnprintf(buf + n, len - n,			\
-			str"\t\t: %uK, %dway/set, %uB Line, %s%s%s\n",	\
-			(p)->sz_k, (p)->assoc, (p)->line_len,		\
-			(p)->vipt ? "VIPT" : "PIPT",			\
-			(p)->alias ? " aliasing" : "",			\
-			IS_USED_CFG(cfg));
-
-	PR_CACHE(&cpuinfo_arc700[c].icache, CONFIG_ARC_HAS_ICACHE, "I-Cache");
-	PR_CACHE(&cpuinfo_arc700[c].dcache, CONFIG_ARC_HAS_DCACHE, "D-Cache");
-
-	p = &cpuinfo_arc700[c].slc;
-	if (p->line_len)
-		n += scnprintf(buf + n, len - n,
-			       "SLC\t\t: %uK, %uB Line%s\n",
-			       p->sz_k, p->line_len, IS_USED_RUN(slc_enable));
-
-	n += scnprintf(buf + n, len - n, "Peripherals\t: %#lx%s%s\n",
-		       perip_base,
-		       IS_AVAIL3(ioc_exists, ioc_enable, ", IO-Coherency (per-device) "));
-
-	return buf;
-}
-
-/*
- * Read the Cache Build Confuration Registers, Decode them and save into
- * the cpuinfo structure for later use.
- * No Validation done here, simply read/convert the BCRs
- */
-static void read_decode_cache_bcr_arcv2(int cpu)
+static int read_decode_cache_bcr_arcv2(int c, char *buf, int len)
 {
-	struct cpuinfo_arc_cache *p_slc = &cpuinfo_arc700[cpu].slc;
+	struct cpuinfo_arc_cache *p_slc = &slc_info;
+	struct bcr_identity ident;
 	struct bcr_generic sbcr;
-
-	struct bcr_slc_cfg {
-#ifdef CONFIG_CPU_BIG_ENDIAN
-		unsigned int pad:24, way:2, lsz:2, sz:4;
-#else
-		unsigned int sz:4, lsz:2, way:2, pad:24;
-#endif
-	} slc_cfg;
-
-	struct bcr_clust_cfg {
-#ifdef CONFIG_CPU_BIG_ENDIAN
-		unsigned int pad:7, c:1, num_entries:8, num_cores:8, ver:8;
-#else
-		unsigned int ver:8, num_cores:8, num_entries:8, c:1, pad:7;
-#endif
-	} cbcr;
-
-	struct bcr_volatile {
-#ifdef CONFIG_CPU_BIG_ENDIAN
-		unsigned int start:4, limit:4, pad:22, order:1, disable:1;
-#else
-		unsigned int disable:1, order:1, pad:22, limit:4, start:4;
-#endif
-	} vol;
-
+	struct bcr_clust_cfg cbcr;
+	struct bcr_volatile vol;
+	int n = 0;
 
 	READ_BCR(ARC_REG_SLC_BCR, sbcr);
 	if (sbcr.ver) {
+		struct bcr_slc_cfg  slc_cfg;
 		READ_BCR(ARC_REG_SLC_CFG, slc_cfg);
 		p_slc->sz_k = 128 << slc_cfg.sz;
 		l2_line_sz = p_slc->line_len = (slc_cfg.lsz == 0) ? 128 : 64;
+		n += scnprintf(buf + n, len - n,
+			       "SLC\t\t: %uK, %uB Line%s\n",
+			       p_slc->sz_k, p_slc->line_len, IS_USED_RUN(slc_enable));
 	}
 
 	READ_BCR(ARC_REG_CLUSTER_BCR, cbcr);
@@ -129,70 +79,83 @@ static void read_decode_cache_bcr_arcv2(int cpu)
 		ioc_enable = 0;
 	}
 
+	READ_BCR(AUX_IDENTITY, ident);
+
 	/* HS 2.0 didn't have AUX_VOL */
-	if (cpuinfo_arc700[cpu].core.family > 0x51) {
+	if (ident.family > 0x51) {
 		READ_BCR(AUX_VOL, vol);
 		perip_base = vol.start << 28;
 		/* HS 3.0 has limit and strict-ordering fields */
-		if (cpuinfo_arc700[cpu].core.family > 0x52)
+		if (ident.family > 0x52)
 			perip_end = (vol.limit << 28) - 1;
 	}
+
+	n += scnprintf(buf + n, len - n, "Peripherals\t: %#lx%s%s\n",
+		       perip_base,
+		       IS_AVAIL3(ioc_exists, ioc_enable, ", IO-Coherency (per-device) "));
+
+	return n;
 }
 
-void read_decode_cache_bcr(void)
+int arc_cache_mumbojumbo(int c, char *buf, int len)
 {
-	struct cpuinfo_arc_cache *p_ic, *p_dc;
-	unsigned int cpu = smp_processor_id();
-	struct bcr_cache {
-#ifdef CONFIG_CPU_BIG_ENDIAN
-		unsigned int pad:12, line_len:4, sz:4, config:4, ver:8;
-#else
-		unsigned int ver:8, config:4, sz:4, line_len:4, pad:12;
-#endif
-	} ibcr, dbcr;
+	struct cpuinfo_arc_cache *p_ic = &ic_info, *p_dc = &dc_info;
+	struct bcr_cache ibcr, dbcr;
+	int vipt, assoc;
+	int n = 0;
 
-	p_ic = &cpuinfo_arc700[cpu].icache;
 	READ_BCR(ARC_REG_IC_BCR, ibcr);
-
 	if (!ibcr.ver)
 		goto dc_chk;
 
-	if (ibcr.ver <= 3) {
+	if (is_isa_arcompact() && (ibcr.ver <= 3)) {
 		BUG_ON(ibcr.config != 3);
-		p_ic->assoc = 2;		/* Fixed to 2w set assoc */
-	} else if (ibcr.ver >= 4) {
-		p_ic->assoc = 1 << ibcr.config;	/* 1,2,4,8 */
+		assoc = 2;		/* Fixed to 2w set assoc */
+	} else if (is_isa_arcv2() && (ibcr.ver >= 4)) {
+		assoc = 1 << ibcr.config;	/* 1,2,4,8 */
 	}
 
 	p_ic->line_len = 8 << ibcr.line_len;
 	p_ic->sz_k = 1 << (ibcr.sz - 1);
-	p_ic->vipt = 1;
-	p_ic->alias = p_ic->sz_k/p_ic->assoc/TO_KB(PAGE_SIZE) > 1;
+	p_ic->colors = p_ic->sz_k/assoc/TO_KB(PAGE_SIZE);
+
+	n += scnprintf(buf + n, len - n,
+			"I-Cache\t\t: %uK, %dway/set, %uB Line, VIPT%s%s\n",
+			p_ic->sz_k, assoc, p_ic->line_len,
+			p_ic->colors > 1 ? " aliasing" : "",
+			IS_USED_CFG(CONFIG_ARC_HAS_ICACHE));
 
 dc_chk:
-	p_dc = &cpuinfo_arc700[cpu].dcache;
 	READ_BCR(ARC_REG_DC_BCR, dbcr);
-
 	if (!dbcr.ver)
 		goto slc_chk;
 
-	if (dbcr.ver <= 3) {
+	if (is_isa_arcompact() && (dbcr.ver <= 3)) {
 		BUG_ON(dbcr.config != 2);
-		p_dc->assoc = 4;		/* Fixed to 4w set assoc */
-		p_dc->vipt = 1;
-		p_dc->alias = p_dc->sz_k/p_dc->assoc/TO_KB(PAGE_SIZE) > 1;
-	} else if (dbcr.ver >= 4) {
-		p_dc->assoc = 1 << dbcr.config;	/* 1,2,4,8 */
-		p_dc->vipt = 0;
-		p_dc->alias = 0;		/* PIPT so can't VIPT alias */
+		vipt = 1;
+		assoc = 4;		/* Fixed to 4w set assoc */
+		p_dc->colors = p_dc->sz_k/assoc/TO_KB(PAGE_SIZE);
+	} else if (is_isa_arcv2() && (dbcr.ver >= 4)) {
+		vipt = 0;
+		assoc = 1 << dbcr.config;	/* 1,2,4,8 */
+		p_dc->colors = 1;		/* PIPT so can't VIPT alias */
 	}
 
 	p_dc->line_len = 16 << dbcr.line_len;
 	p_dc->sz_k = 1 << (dbcr.sz - 1);
 
+	n += scnprintf(buf + n, len - n,
+			"D-Cache\t\t: %uK, %dway/set, %uB Line, %s%s%s\n",
+			p_dc->sz_k, assoc, p_dc->line_len,
+			vipt ? "VIPT" : "PIPT",
+			p_dc->colors > 1 ? " aliasing" : "",
+			IS_USED_CFG(CONFIG_ARC_HAS_DCACHE));
+
 slc_chk:
 	if (is_isa_arcv2())
-                read_decode_cache_bcr_arcv2(cpu);
+		n += read_decode_cache_bcr_arcv2(c, buf + n, len - n);
+
+	return n;
 }
 
 /*
@@ -581,7 +544,7 @@ static void __ic_line_inv_vaddr(phys_addr_t paddr, unsigned long vaddr,
 
 #endif /* CONFIG_ARC_HAS_ICACHE */
 
-noinline void slc_op_rgn(phys_addr_t paddr, unsigned long sz, const int op)
+static noinline void slc_op_rgn(phys_addr_t paddr, unsigned long sz, const int op)
 {
 #ifdef CONFIG_ISA_ARCV2
 	/*
@@ -644,7 +607,7 @@ noinline void slc_op_rgn(phys_addr_t paddr, unsigned long sz, const int op)
 #endif
 }
 
-noinline void slc_op_line(phys_addr_t paddr, unsigned long sz, const int op)
+static __maybe_unused noinline void slc_op_line(phys_addr_t paddr, unsigned long sz, const int op)
 {
 #ifdef CONFIG_ISA_ARCV2
 	/*
@@ -1082,7 +1045,7 @@ SYSCALL_DEFINE3(cacheflush, uint32_t, start, uint32_t, sz, uint32_t, flags)
  * 3. All Caches need to be disabled when setting up IOC to elide any in-flight
  *    Coherency transactions
  */
-noinline void __init arc_ioc_setup(void)
+static noinline void __init arc_ioc_setup(void)
 {
 	unsigned int ioc_base, mem_sz;
 
@@ -1144,12 +1107,10 @@ noinline void __init arc_ioc_setup(void)
  *    one core suffices for all
  *  - IOC setup / dma callbacks only need to be done once
  */
-void __init arc_cache_init_master(void)
+static noinline void __init arc_cache_init_master(void)
 {
-	unsigned int __maybe_unused cpu = smp_processor_id();
-
 	if (IS_ENABLED(CONFIG_ARC_HAS_ICACHE)) {
-		struct cpuinfo_arc_cache *ic = &cpuinfo_arc700[cpu].icache;
+		struct cpuinfo_arc_cache *ic = &ic_info;
 
 		if (!ic->line_len)
 			panic("cache support enabled but non-existent cache\n");
@@ -1162,14 +1123,14 @@ void __init arc_cache_init_master(void)
 		 * In MMU v4 (HS38x) the aliasing icache config uses IVIL/PTAG
 		 * pair to provide vaddr/paddr respectively, just as in MMU v3
 		 */
-		if (is_isa_arcv2() && ic->alias)
+		if (is_isa_arcv2() && ic->colors > 1)
 			_cache_line_loop_ic_fn = __cache_line_loop_v3;
 		else
 			_cache_line_loop_ic_fn = __cache_line_loop;
 	}
 
 	if (IS_ENABLED(CONFIG_ARC_HAS_DCACHE)) {
-		struct cpuinfo_arc_cache *dc = &cpuinfo_arc700[cpu].dcache;
+		struct cpuinfo_arc_cache *dc = &dc_info;
 
 		if (!dc->line_len)
 			panic("cache support enabled but non-existent cache\n");
@@ -1181,14 +1142,13 @@ void __init arc_cache_init_master(void)
 		/* check for D-Cache aliasing on ARCompact: ARCv2 has PIPT */
 		if (is_isa_arcompact()) {
 			int handled = IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING);
-			int num_colors = dc->sz_k/dc->assoc/TO_KB(PAGE_SIZE);
 
-			if (dc->alias) {
+			if (dc->colors > 1) {
 				if (!handled)
 					panic("Enable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
-				if (CACHE_COLORS_NUM != num_colors)
+				if (CACHE_COLORS_NUM != dc->colors)
 					panic("CACHE_COLORS_NUM not optimized for config\n");
-			} else if (!dc->alias && handled) {
+			} else if (handled && dc->colors == 1) {
 				panic("Disable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
 			}
 		}
@@ -1231,9 +1191,6 @@ void __init arc_cache_init_master(void)
 void __ref arc_cache_init(void)
 {
 	unsigned int __maybe_unused cpu = smp_processor_id();
-	char str[256];
-
-	pr_info("%s", arc_cache_mumbojumbo(0, str, sizeof(str)));
 
 	if (!cpu)
 		arc_cache_init_master();
diff --git a/arch/arc/mm/extable.c b/arch/arc/mm/extable.c
index 4e14c4244ea2..88fa3a4d4906 100644
--- a/arch/arc/mm/extable.c
+++ b/arch/arc/mm/extable.c
@@ -22,14 +22,3 @@ int fixup_exception(struct pt_regs *regs)
 
 	return 0;
 }
-
-#ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-
-unsigned long arc_clear_user_noinline(void __user *to,
-		unsigned long n)
-{
-	return __arc_clear_user(to, n);
-}
-EXPORT_SYMBOL(arc_clear_user_noinline);
-
-#endif
diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c
index f59e722d147f..95119a5e7761 100644
--- a/arch/arc/mm/fault.c
+++ b/arch/arc/mm/fault.c
@@ -13,6 +13,7 @@
 #include <linux/kdebug.h>
 #include <linux/perf_event.h>
 #include <linux/mm_types.h>
+#include <asm/entry.h>
 #include <asm/mmu.h>
 
 /*
@@ -99,10 +100,10 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
 	if (faulthandler_disabled() || !mm)
 		goto no_context;
 
-	if (regs->ecr_cause & ECR_C_PROTV_STORE)	/* ST/EX */
+	if (regs->ecr.cause & ECR_C_PROTV_STORE)	/* ST/EX */
 		write = 1;
-	else if ((regs->ecr_vec == ECR_V_PROTV) &&
-	         (regs->ecr_cause == ECR_C_PROTV_INST_FETCH))
+	else if ((regs->ecr.vec == ECR_V_PROTV) &&
+	         (regs->ecr.cause == ECR_C_PROTV_INST_FETCH))
 		exec = 1;
 
 	flags = FAULT_FLAG_DEFAULT;
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 9f64d729c9f8..6a71b23f1383 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -15,6 +15,7 @@
 #include <linux/highmem.h>
 #include <asm/page.h>
 #include <asm/sections.h>
+#include <asm/setup.h>
 #include <asm/arcregs.h>
 
 pgd_t swapper_pg_dir[PTRS_PER_PGD] __aligned(PAGE_SIZE);
diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c
index 6f40f37e6550..e536b2dcd4b0 100644
--- a/arch/arc/mm/tlb.c
+++ b/arch/arc/mm/tlb.c
@@ -18,7 +18,9 @@
 /* A copy of the ASID from the PID reg is kept in asid_cache */
 DEFINE_PER_CPU(unsigned int, asid_cache) = MM_CTXT_FIRST_CYCLE;
 
-static int __read_mostly pae_exists;
+static struct cpuinfo_arc_mmu {
+	unsigned int ver, pg_sz_k, s_pg_sz_m, pae, sets, ways;
+} mmuinfo;
 
 /*
  * Utility Routine to erase a J-TLB entry
@@ -131,7 +133,7 @@ static void tlb_entry_insert(unsigned int pd0, phys_addr_t pd1)
 
 noinline void local_flush_tlb_all(void)
 {
-	struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
+	struct cpuinfo_arc_mmu *mmu = &mmuinfo;
 	unsigned long flags;
 	unsigned int entry;
 	int num_tlb = mmu->sets * mmu->ways;
@@ -389,7 +391,7 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end)
 /*
  * Routine to create a TLB entry
  */
-void create_tlb(struct vm_area_struct *vma, unsigned long vaddr, pte_t *ptep)
+static void create_tlb(struct vm_area_struct *vma, unsigned long vaddr, pte_t *ptep)
 {
 	unsigned long flags;
 	unsigned int asid_or_sasid, rwx;
@@ -564,89 +566,64 @@ void local_flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
  * the cpuinfo structure for later use.
  * No Validation is done here, simply read/convert the BCRs
  */
-void read_decode_mmu_bcr(void)
+int arc_mmu_mumbojumbo(int c, char *buf, int len)
 {
-	struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
-	unsigned int tmp;
-	struct bcr_mmu_3 {
-#ifdef CONFIG_CPU_BIG_ENDIAN
-	unsigned int ver:8, ways:4, sets:4, res:3, sasid:1, pg_sz:4,
-		     u_itlb:4, u_dtlb:4;
-#else
-	unsigned int u_dtlb:4, u_itlb:4, pg_sz:4, sasid:1, res:3, sets:4,
-		     ways:4, ver:8;
-#endif
-	} *mmu3;
-
-	struct bcr_mmu_4 {
-#ifdef CONFIG_CPU_BIG_ENDIAN
-	unsigned int ver:8, sasid:1, sz1:4, sz0:4, res:2, pae:1,
-		     n_ways:2, n_entry:2, n_super:2, u_itlb:3, u_dtlb:3;
-#else
-	/*           DTLB      ITLB      JES        JE         JA      */
-	unsigned int u_dtlb:3, u_itlb:3, n_super:2, n_entry:2, n_ways:2,
-		     pae:1, res:2, sz0:4, sz1:4, sasid:1, ver:8;
-#endif
-	} *mmu4;
+	struct cpuinfo_arc_mmu *mmu = &mmuinfo;
+	unsigned int bcr, u_dtlb, u_itlb, sasid;
+	struct bcr_mmu_3 *mmu3;
+	struct bcr_mmu_4 *mmu4;
+	char super_pg[64] = "";
+	int n = 0;
 
-	tmp = read_aux_reg(ARC_REG_MMU_BCR);
-	mmu->ver = (tmp >> 24);
+	bcr = read_aux_reg(ARC_REG_MMU_BCR);
+	mmu->ver = (bcr >> 24);
 
 	if (is_isa_arcompact() && mmu->ver == 3) {
-		mmu3 = (struct bcr_mmu_3 *)&tmp;
+		mmu3 = (struct bcr_mmu_3 *)&bcr;
 		mmu->pg_sz_k = 1 << (mmu3->pg_sz - 1);
 		mmu->sets = 1 << mmu3->sets;
 		mmu->ways = 1 << mmu3->ways;
-		mmu->u_dtlb = mmu3->u_dtlb;
-		mmu->u_itlb = mmu3->u_itlb;
-		mmu->sasid = mmu3->sasid;
+		u_dtlb = mmu3->u_dtlb;
+		u_itlb = mmu3->u_itlb;
+		sasid = mmu3->sasid;
 	} else {
-		mmu4 = (struct bcr_mmu_4 *)&tmp;
+		mmu4 = (struct bcr_mmu_4 *)&bcr;
 		mmu->pg_sz_k = 1 << (mmu4->sz0 - 1);
 		mmu->s_pg_sz_m = 1 << (mmu4->sz1 - 11);
 		mmu->sets = 64 << mmu4->n_entry;
 		mmu->ways = mmu4->n_ways * 2;
-		mmu->u_dtlb = mmu4->u_dtlb * 4;
-		mmu->u_itlb = mmu4->u_itlb * 4;
-		mmu->sasid = mmu4->sasid;
-		pae_exists = mmu->pae = mmu4->pae;
+		u_dtlb = mmu4->u_dtlb * 4;
+		u_itlb = mmu4->u_itlb * 4;
+		sasid = mmu4->sasid;
+		mmu->pae = mmu4->pae;
 	}
-}
 
-char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len)
-{
-	int n = 0;
-	struct cpuinfo_arc_mmu *p_mmu = &cpuinfo_arc700[cpu_id].mmu;
-	char super_pg[64] = "";
-
-	if (p_mmu->s_pg_sz_m)
-		scnprintf(super_pg, 64, "%dM Super Page %s",
-			  p_mmu->s_pg_sz_m,
-			  IS_USED_CFG(CONFIG_TRANSPARENT_HUGEPAGE));
+	if (mmu->s_pg_sz_m)
+		scnprintf(super_pg, 64, "/%dM%s",
+			  mmu->s_pg_sz_m,
+			  IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) ? " (THP enabled)":"");
 
 	n += scnprintf(buf + n, len - n,
-		      "MMU [v%x]\t: %dk PAGE, %s, swalk %d lvl, JTLB %d (%dx%d), uDTLB %d, uITLB %d%s%s\n",
-		       p_mmu->ver, p_mmu->pg_sz_k, super_pg,  CONFIG_PGTABLE_LEVELS,
-		       p_mmu->sets * p_mmu->ways, p_mmu->sets, p_mmu->ways,
-		       p_mmu->u_dtlb, p_mmu->u_itlb,
-		       IS_AVAIL2(p_mmu->pae, ", PAE40 ", CONFIG_ARC_HAS_PAE40));
-
-	return buf;
+		      "MMU [v%x]\t: %dk%s, swalk %d lvl, JTLB %dx%d, uDTLB %d, uITLB %d%s%s%s\n",
+		       mmu->ver, mmu->pg_sz_k, super_pg, CONFIG_PGTABLE_LEVELS,
+		       mmu->sets, mmu->ways,
+		       u_dtlb, u_itlb,
+		       IS_AVAIL1(sasid, ", SASID"),
+		       IS_AVAIL2(mmu->pae, ", PAE40 ", CONFIG_ARC_HAS_PAE40));
+
+	return n;
 }
 
 int pae40_exist_but_not_enab(void)
 {
-	return pae_exists && !is_pae40_enabled();
+	return mmuinfo.pae && !is_pae40_enabled();
 }
 
 void arc_mmu_init(void)
 {
-	struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
-	char str[256];
+	struct cpuinfo_arc_mmu *mmu = &mmuinfo;
 	int compat = 0;
 
-	pr_info("%s", arc_mmu_mumbojumbo(0, str, sizeof(str)));
-
 	/*
 	 * Can't be done in processor.h due to header include dependencies
 	 */
@@ -723,7 +700,7 @@ volatile int dup_pd_silent; /* Be silent abt it or complain (default) */
 void do_tlb_overlap_fault(unsigned long cause, unsigned long address,
 			  struct pt_regs *regs)
 {
-	struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
+	struct cpuinfo_arc_mmu *mmu = &mmuinfo;
 	unsigned long flags;
 	int set, n_ways = mmu->ways;