Merge tag 'powerpc-4.11-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Some more powerpc fixes for 4.11:

  Headed to stable:

   - disable HFSCR[TM] if TM is not supported, fixes a potential host
     kernel crash triggered by a hostile guest, but only in
     configurations that no one uses

   - don't try to fix up misaligned load-with-reservation instructions

   - fix flush_(d|i)cache_range() called from modules on little endian
     kernels

   - add missing global TLB invalidate if cxl is active

   - fix missing preempt_disable() in crc32c-vpmsum

  And a fix for selftests build changes that went in this release:

   - selftests/powerpc: Fix standalone powerpc build

  Thanks to: Benjamin Herrenschmidt, Frederic Barrat, Oliver O'Halloran,
  Paul Mackerras"

* tag 'powerpc-4.11-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/crypto/crc32c-vpmsum: Fix missing preempt_disable()
  powerpc/mm: Add missing global TLB invalidate if cxl is active
  powerpc/64: Fix flush_(d|i)cache_range() called from modules
  powerpc: Don't try to fix up misaligned load-with-reservation instructions
  powerpc: Disable HFSCR[TM] if TM is not supported
  selftests/powerpc: Fix standalone powerpc build

6 files changed, 43 insertions, 17 deletions

diff --git a/arch/powerpc/crypto/crc32c-vpmsum_glue.c b/arch/powerpc/crypto/crc32c-vpmsum_glue.c
index 411994551afc..f058e0c3e4d4 100644
--- a/arch/powerpc/crypto/crc32c-vpmsum_glue.c
+++ b/arch/powerpc/crypto/crc32c-vpmsum_glue.c
@@ -33,10 +33,13 @@ static u32 crc32c_vpmsum(u32 crc, unsigned char const *p, size_t len)
         }
 
         if (len & ~VMX_ALIGN_MASK) {
+                preempt_disable();
                 pagefault_disable();
                 enable_kernel_altivec();
                 crc = __crc32c_vpmsum(crc, p, len & ~VMX_ALIGN_MASK);
+                disable_kernel_altivec();
                 pagefault_enable();
+                preempt_enable();
         }
 
         tail = len & VMX_ALIGN_MASK;
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index cbc7c42cdb74..ec7a8b099dd9 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -807,14 +807,25 @@ int fix_alignment(struct pt_regs *regs)
         nb = aligninfo[instr].len;
         flags = aligninfo[instr].flags;
 
-        /* ldbrx/stdbrx overlap lfs/stfs in the DSISR unfortunately */
-        if (IS_XFORM(instruction) && ((instruction >> 1) & 0x3ff) == 532) {
-                nb = 8;
-                flags = LD+SW;
-        } else if (IS_XFORM(instruction) &&
-                   ((instruction >> 1) & 0x3ff) == 660) {
-                nb = 8;
-                flags = ST+SW;
+        /*
+         * Handle some cases which give overlaps in the DSISR values.
+         */
+        if (IS_XFORM(instruction)) {
+                switch (get_xop(instruction)) {
+                case 532:       /* ldbrx */
+                        nb = 8;
+                        flags = LD+SW;
+                        break;
+                case 660:       /* stdbrx */
+                        nb = 8;
+                        flags = ST+SW;
+                        break;
+                case 20:        /* lwarx */
+                case 84:        /* ldarx */
+                case 116:       /* lharx */
+                case 276:       /* lqarx */
+                        return 0;       /* not emulated ever */
+                }
         }
 
         /* Byteswap little endian loads and stores */
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index ae179cb1bb3c..c119044cad0d 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -67,7 +67,7 @@ PPC64_CACHES:
  *   flush all bytes from start through stop-1 inclusive
  */
 
-_GLOBAL(flush_icache_range)
+_GLOBAL_TOC(flush_icache_range)
 BEGIN_FTR_SECTION
         PURGE_PREFETCHED_INS
         blr
@@ -120,7 +120,7 @@ EXPORT_SYMBOL(flush_icache_range)
  *
  *    flush all bytes from start to stop-1 inclusive
  */
-_GLOBAL(flush_dcache_range)
+_GLOBAL_TOC(flush_dcache_range)
 
 /*
  * Flush the data cache to memory 
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 9cfaa8b69b5f..f997154dfc41 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -236,6 +236,15 @@ static void cpu_ready_for_interrupts(void)
                 mtspr(SPRN_LPCR, lpcr | LPCR_AIL_3);
         }
 
+        /*
+         * Fixup HFSCR:TM based on CPU features. The bit is set by our
+         * early asm init because at that point we haven't updated our
+         * CPU features from firmware and device-tree. Here we have,
+         * so let's do it.
+         */
+        if (cpu_has_feature(CPU_FTR_HVMODE) && !cpu_has_feature(CPU_FTR_TM_COMP))
+                mtspr(SPRN_HFSCR, mfspr(SPRN_HFSCR) & ~HFSCR_TM);
+
         /* Set IR and DR in PACA MSR */
         get_paca()->kernel_msr = MSR_KERNEL;
 }
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c
index cc332608e656..65bb8f33b399 100644
--- a/arch/powerpc/mm/hash_native_64.c
+++ b/arch/powerpc/mm/hash_native_64.c
@@ -638,6 +638,10 @@ static void native_flush_hash_range(unsigned long number, int local)
         unsigned long psize = batch->psize;
         int ssize = batch->ssize;
         int i;
+        unsigned int use_local;
+
+        use_local = local && mmu_has_feature(MMU_FTR_TLBIEL) &&
+                mmu_psize_defs[psize].tlbiel && !cxl_ctx_in_use();
 
         local_irq_save(flags);
 
@@ -667,8 +671,7 @@ static void native_flush_hash_range(unsigned long number, int local)
                 } pte_iterate_hashed_end();
         }
 
-        if (mmu_has_feature(MMU_FTR_TLBIEL) &&
-            mmu_psize_defs[psize].tlbiel && local) {
+        if (use_local) {
                 asm volatile("ptesync":::"memory");
                 for (i = 0; i < number; i++) {
                         vpn = batch->vpn[i];
diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile
index 1c5d0575802e..bf13fc2297aa 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -34,34 +34,34 @@ endif
 all: $(SUB_DIRS)
 
 $(SUB_DIRS):
-        BUILD_TARGET=$$OUTPUT/$@; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $@ all
+        BUILD_TARGET=$(OUTPUT)/$@; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $@ all
 
 include ../lib.mk
 
 override define RUN_TESTS
         @for TARGET in $(SUB_DIRS); do \
-                BUILD_TARGET=$$OUTPUT/$$TARGET; \
+                BUILD_TARGET=$(OUTPUT)/$$TARGET;        \
                 $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_tests;\
         done;
 endef
 
 override define INSTALL_RULE
         @for TARGET in $(SUB_DIRS); do \
-                BUILD_TARGET=$$OUTPUT/$$TARGET; \
+                BUILD_TARGET=$(OUTPUT)/$$TARGET;        \
                 $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET install;\
         done;
 endef
 
 override define EMIT_TESTS
         @for TARGET in $(SUB_DIRS); do \
-                BUILD_TARGET=$$OUTPUT/$$TARGET; \
+                BUILD_TARGET=$(OUTPUT)/$$TARGET;        \
                 $(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests;\
         done;
 endef
 
 clean:
         @for TARGET in $(SUB_DIRS); do \
-                BUILD_TARGET=$$OUTPUT/$$TARGET; \
+                BUILD_TARGET=$(OUTPUT)/$$TARGET;        \
                 $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean; \
         done;
         rm -f tags