Merge tag 'arc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC updates from Vineet Gupta:
 "Finally a big pile of changes for ARC (atomics/mm). These are from our
  internal arc64 tree, preparing mainline for eventual arc64 support.
  I'm spreading them out to avoid tsunami of patches in one release.

   - MM rework:
       - Implement up to 4 paging levels
       - Enable STRICT_MM_TYPECHECK
       - switch pgtable_t back to 'struct page *'

   - Atomics rework / implement relaxed accessors

   - Retire legacy MMUv1,v2; ARC750 cores

   - A few other build errors, typos"

* tag 'arc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (33 commits)
  ARC: mm: vmalloc sync from kernel to user table to update PMD ...
  ARC: mm: support 4 levels of page tables
  ARC: mm: support 3 levels of page tables
  ARC: mm: switch to asm-generic/pgalloc.h
  ARC: mm: switch pgtable_t back to struct page *
  ARC: mm: hack to allow 2 level build with 4 level code
  ARC: mm: disintegrate pgtable.h into levels and flags
  ARC: mm: disintegrate mmu.h (arcv2 bits out)
  ARC: mm: move MMU specific bits out of entry code ...
  ARC: mm: move MMU specific bits out of ASID allocator
  ARC: mm: non-functional code movement/cleanup
  ARC: mm: pmd_populate* to use the canonical set_pmd (and drop pmd_set)
  ARC: ioremap: use more commonly used PAGE_KERNEL based uncached flag
  ARC: mm: Enable STRICT_MM_TYPECHECKS
  ARC: mm: Fixes to allow STRICT_MM_TYPECHECKS
  ARC: mm: move mmu/cache externs out to setup.h
  ARC: mm: remove tlb paranoid code
  ARC: mm: use SCRATCH_DATA0 register for caching pgdir in ARCv2 only
  ARC: retire MMUv1 and MMUv2 support
  ARC: retire ARC750 support
  ...

1 files changed, 8 insertions, 33 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index b5bf68e74732..f631a7a60979 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -116,16 +116,9 @@ choice
 	default ARC_CPU_770 if ISA_ARCOMPACT
 	default ARC_CPU_HS if ISA_ARCV2
 
-if ISA_ARCOMPACT
-
-config ARC_CPU_750D
-	bool "ARC750D"
-	select ARC_CANT_LLSC
-	help
-	  Support for ARC750 core
-
 config ARC_CPU_770
 	bool "ARC770"
+	depends on ISA_ARCOMPACT
 	select ARC_HAS_SWAPE
 	help
 	  Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
@@ -135,8 +128,6 @@ config ARC_CPU_770
 	  -Caches: New Prog Model, Region Flush
 	  -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
 
-endif #ISA_ARCOMPACT
-
 config ARC_CPU_HS
 	bool "ARC-HS"
 	depends on ISA_ARCV2
@@ -274,33 +265,17 @@ config ARC_DCCM_BASE
 
 choice
 	prompt "MMU Version"
-	default ARC_MMU_V3 if ARC_CPU_770
-	default ARC_MMU_V2 if ARC_CPU_750D
-	default ARC_MMU_V4 if ARC_CPU_HS
-
-if ISA_ARCOMPACT
-
-config ARC_MMU_V1
-	bool "MMU v1"
-	help
-	  Orig ARC700 MMU
-
-config ARC_MMU_V2
-	bool "MMU v2"
-	help
-	  Fixed the deficiency of v1 - possible thrashing in memcpy scenario
-	  when 2 D-TLB and 1 I-TLB entries index into same 2way set.
+	default ARC_MMU_V3 if ISA_ARCOMPACT
+	default ARC_MMU_V4 if ISA_ARCV2
 
 config ARC_MMU_V3
 	bool "MMU v3"
-	depends on ARC_CPU_770
+	depends on ISA_ARCOMPACT
 	help
 	  Introduced with ARC700 4.10: New Features
 	  Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
 	  Shared Address Spaces (SASID)
 
-endif
-
 config ARC_MMU_V4
 	bool "MMU v4"
 	depends on ISA_ARCV2
@@ -319,7 +294,6 @@ config ARC_PAGE_SIZE_8K
 
 config ARC_PAGE_SIZE_16K
 	bool "16KB"
-	depends on ARC_MMU_V3 || ARC_MMU_V4
 
 config ARC_PAGE_SIZE_4K
 	bool "4KB"
@@ -340,6 +314,10 @@ config ARC_HUGEPAGE_16M
 
 endchoice
 
+config PGTABLE_LEVELS
+	int "Number of Page table levels"
+	default 2
+
 config ARC_COMPACT_IRQ_LEVELS
 	depends on ISA_ARCOMPACT
 	bool "Setup Timer IRQ as high Priority"
@@ -563,9 +541,6 @@ config ARC_DW2_UNWIND
 	  If you don't debug the kernel, you can say N, but we may not be able
 	  to solve problems without frame unwind information
 
-config ARC_DBG_TLB_PARANOIA
-	bool "Paranoia Checks in Low Level TLB Handlers"
-
 config ARC_DBG_JUMP_LABEL
 	bool "Paranoid checks in Static Keys (jump labels) code"
 	depends on JUMP_LABEL