Merge tag 'powerpc-6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Add support for KVM running as a nested hypervisor under development
   versions of PowerVM, using the new PAPR nested virtualisation API

 - Add support for the BPF prog pack allocator

 - A rework of the non-server MMU handling to support execute-only on
   all platforms

 - Some optimisations & cleanups for the powerpc qspinlock code

 - Various other small features and fixes

Thanks to Aboorva Devarajan, Aditya Gupta, Amit Machhiwal, Benjamin
Gray, Christophe Leroy, Dr. David Alan Gilbert, Gaurav Batra, Gautam
Menghani, Geert Uytterhoeven, Haren Myneni, Hari Bathini, Joel Stanley,
Jordan Niethe, Julia Lawall, Kautuk Consul, Kuan-Wei Chiu, Michael
Neuling, Minjie Du, Muhammad Muzammil, Naveen N Rao, Nicholas Piggin,
Nick Child, Nysal Jan K.A, Peter Lafreniere, Rob Herring, Sachin Sant,
Sebastian Andrzej Siewior, Shrikanth Hegde, Srikar Dronamraju, Stanislav
Kinsburskii, Vaibhav Jain, Wang Yufen, Yang Yingliang, and Yuan Tan.

* tag 'powerpc-6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (100 commits)
  powerpc/vmcore: Add MMU information to vmcoreinfo
  Revert "powerpc: add `cur_cpu_spec` symbol to vmcoreinfo"
  powerpc/bpf: use bpf_jit_binary_pack_[alloc|finalize|free]
  powerpc/bpf: rename powerpc64_jit_data to powerpc_jit_data
  powerpc/bpf: implement bpf_arch_text_invalidate for bpf_prog_pack
  powerpc/bpf: implement bpf_arch_text_copy
  powerpc/code-patching: introduce patch_instructions()
  powerpc/32s: Implement local_flush_tlb_page_psize()
  powerpc/pseries: use kfree_sensitive() in plpks_gen_password()
  powerpc/code-patching: Perform hwsync in __patch_instruction() in case of failure
  powerpc/fsl_msi: Use device_get_match_data()
  powerpc: Remove cpm_dp...() macros
  powerpc/qspinlock: Rename yield_propagate_owner tunable
  powerpc/qspinlock: Propagate sleepy if previous waiter is preempted
  powerpc/qspinlock: don't propagate the not-sleepy state
  powerpc/qspinlock: propagate owner preemptedness rather than CPU number
  powerpc/qspinlock: stop queued waiters trying to set lock sleepy
  powerpc/perf: Fix disabling BHRB and instruction sampling
  powerpc/trace: Add support for HAVE_FUNCTION_ARG_ACCESS_API
  powerpc/tools: Pass -mabi=elfv2 to gcc-check-mprofile-kernel.sh
  ...

1 files changed, 20 insertions, 12 deletions

diff --git a/arch/powerpc/mm/book3s32/hash_low.S b/arch/powerpc/mm/book3s32/hash_low.S
index 8b804e1a9fa4..4ed0efd03db5 100644
--- a/arch/powerpc/mm/book3s32/hash_low.S
+++ b/arch/powerpc/mm/book3s32/hash_low.S
@@ -36,8 +36,9 @@
 
 /*
  * Load a PTE into the hash table, if possible.
- * The address is in r4, and r3 contains an access flag:
- * _PAGE_RW (0x400) if a write.
+ * The address is in r4, and r3 contains required access flags:
+ *   - For ISI: _PAGE_PRESENT | _PAGE_EXEC
+ *   - For DSI: _PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE if a write.
  * r9 contains the SRR1 value, from which we use the MSR_PR bit.
  * SPRG_THREAD contains the physical address of the current task's thread.
  *
@@ -67,12 +68,16 @@ _GLOBAL(hash_page)
 	lis	r0, TASK_SIZE@h		/* check if kernel address */
 	cmplw	0,r4,r0
 	mfspr	r8,SPRN_SPRG_THREAD	/* current task's THREAD (phys) */
-	ori	r3,r3,_PAGE_USER|_PAGE_PRESENT /* test low addresses as user */
 	lwz	r5,PGDIR(r8)		/* virt page-table root */
 	blt+	112f			/* assume user more likely */
 	lis	r5,swapper_pg_dir@ha	/* if kernel address, use */
+	andi.	r0,r9,MSR_PR		/* Check usermode */
 	addi	r5,r5,swapper_pg_dir@l	/* kernel page table */
-	rlwimi	r3,r9,32-12,29,29	/* MSR_PR -> _PAGE_USER */
+#ifdef CONFIG_SMP
+	bne-	.Lhash_page_out		/* return if usermode */
+#else
+	bnelr-
+#endif
 112:	tophys(r5, r5)
 #ifndef CONFIG_PTE_64BIT
 	rlwimi	r5,r4,12,20,29		/* insert top 10 bits of address */
@@ -113,15 +118,15 @@ _GLOBAL(hash_page)
 	lwarx	r6,0,r8			/* get linux-style pte, flag word */
 #ifdef CONFIG_PPC_KUAP
 	mfsrin	r5,r4
-	rlwinm	r0,r9,28,_PAGE_RW	/* MSR[PR] => _PAGE_RW */
-	rlwinm	r5,r5,12,_PAGE_RW	/* Ks => _PAGE_RW */
+	rlwinm	r0,r9,28,_PAGE_WRITE	/* MSR[PR] => _PAGE_WRITE */
+	rlwinm	r5,r5,12,_PAGE_WRITE	/* Ks => _PAGE_WRITE */
 	andc	r5,r5,r0		/* Ks & ~MSR[PR] */
-	andc	r5,r6,r5		/* Clear _PAGE_RW when Ks = 1 && MSR[PR] = 0 */
+	andc	r5,r6,r5		/* Clear _PAGE_WRITE when Ks = 1 && MSR[PR] = 0 */
 	andc.	r5,r3,r5		/* check access & ~permission */
 #else
 	andc.	r5,r3,r6		/* check access & ~permission */
 #endif
-	rlwinm	r0,r3,32-3,24,24	/* _PAGE_RW access -> _PAGE_DIRTY */
+	rlwinm	r0,r3,32-3,24,24	/* _PAGE_WRITE access -> _PAGE_DIRTY */
 	ori	r0,r0,_PAGE_ACCESSED|_PAGE_HASHPTE
 #ifdef CONFIG_SMP
 	bne-	.Lhash_page_out		/* return if access not permitted */
@@ -307,12 +312,15 @@ Hash_msk = (((1 << Hash_bits) - 1) * 64)
 __REF
 _GLOBAL(create_hpte)
 	/* Convert linux-style PTE (r5) to low word of PPC-style PTE (r8) */
-	rlwinm	r8,r5,32-9,30,30	/* _PAGE_RW -> PP msb */
+	lis	r0, TASK_SIZE@h
+	rlwinm	r5,r5,0,~3		/* Clear PP bits */
+	cmplw	r4,r0
+	rlwinm	r8,r5,32-9,30,30	/* _PAGE_WRITE -> PP msb */
 	rlwinm	r0,r5,32-6,30,30	/* _PAGE_DIRTY -> PP msb */
 	and	r8,r8,r0		/* writable if _RW & _DIRTY */
-	rlwimi	r5,r5,32-1,30,30	/* _PAGE_USER -> PP msb */
-	rlwimi	r5,r5,32-2,31,31	/* _PAGE_USER -> PP lsb */
-	ori	r8,r8,0xe04		/* clear out reserved bits */
+	bge-	1f			/* Kernelspace ? Skip */
+	ori	r5,r5,3			/* Userspace ? PP = 3 */
+1:	ori	r8,r8,0xe04		/* clear out reserved bits */
 	andc	r8,r5,r8		/* PP = user? (rw&dirty? 1: 3): 0 */
 BEGIN_FTR_SECTION
 	rlwinm	r8,r8,0,~_PAGE_COHERENT	/* clear M (coherence not required) */