Merge tag 'powerpc-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Switch to the generic C VDSO, as well as some cleanups of our VDSO
   setup/handling code.

 - Support for KUAP (Kernel User Access Prevention) on systems using the
   hashed page table MMU, using memory protection keys.

 - Better handling of PowerVM SMT8 systems where all threads of a core
   do not share an L2, allowing the scheduler to make better scheduling
   decisions.

 - Further improvements to our machine check handling.

 - Show registers when unwinding interrupt frames during stack traces.

 - Improvements to our pseries (PowerVM) partition migration code.

 - Several series from Christophe refactoring and cleaning up various
   parts of the 32-bit code.

 - Other smaller features, fixes & cleanups.

Thanks to: Alan Modra, Alexey Kardashevskiy, Andrew Donnellan, Aneesh
Kumar K.V, Ard Biesheuvel, Athira Rajeev, Balamuruhan S, Bill Wendling,
Cédric Le Goater, Christophe Leroy, Christophe Lombard, Colin Ian King,
Daniel Axtens, David Hildenbrand, Frederic Barrat, Ganesh Goudar,
Gautham R. Shenoy, Geert Uytterhoeven, Giuseppe Sacco, Greg Kurz,
Harish, Jan Kratochvil, Jordan Niethe, Kaixu Xia, Laurent Dufour,
Leonardo Bras, Madhavan Srinivasan, Mahesh Salgaonkar, Mathieu
Desnoyers, Nathan Lynch, Nicholas Piggin, Oleg Nesterov, Oliver
O'Halloran, Oscar Salvador, Po-Hsu Lin, Qian Cai, Qinglang Miao, Randy
Dunlap, Ravi Bangoria, Sachin Sant, Sandipan Das, Sebastian Andrzej
Siewior , Segher Boessenkool, Srikar Dronamraju, Tyrel Datwyler, Uwe
Kleine-König, Vincent Stehlé, Youling Tang, and Zhang Xiaoxu.

* tag 'powerpc-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (304 commits)
  powerpc/32s: Fix cleanup_cpu_mmu_context() compile bug
  powerpc: Add config fragment for disabling -Werror
  powerpc/configs: Add ppc64le_allnoconfig target
  powerpc/powernv: Rate limit opal-elog read failure message
  powerpc/pseries/memhotplug: Quieten some DLPAR operations
  powerpc/ps3: use dma_mapping_error()
  powerpc: force inlining of csum_partial() to avoid multiple csum_partial() with GCC10
  powerpc/perf: Fix Threshold Event Counter Multiplier width for P10
  powerpc/mm: Fix hugetlb_free_pmd_range() and hugetlb_free_pud_range()
  KVM: PPC: Book3S HV: Fix mask size for emulated msgsndp
  KVM: PPC: fix comparison to bool warning
  KVM: PPC: Book3S: Assign boolean values to a bool variable
  powerpc: Inline setup_kup()
  powerpc/64s: Mark the kuap/kuep functions non __init
  KVM: PPC: Book3S HV: XIVE: Add a comment regarding VP numbering
  powerpc/xive: Improve error reporting of OPAL calls
  powerpc/xive: Simplify xive_do_source_eoi()
  powerpc/xive: Remove P9 DD1 flag XIVE_IRQ_FLAG_EOI_FW
  powerpc/xive: Remove P9 DD1 flag XIVE_IRQ_FLAG_MASK_FW
  powerpc/xive: Remove P9 DD1 flag XIVE_IRQ_FLAG_SHIFT_BUG
  ...

1 files changed, 18 insertions, 12 deletions

diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c
index a59e7ec98180..859e5bd603ac 100644
--- a/arch/powerpc/mm/book3s32/mmu.c
+++ b/arch/powerpc/mm/book3s32/mmu.c
@@ -33,19 +33,23 @@
 
 u8 __initdata early_hash[SZ_256K] __aligned(SZ_256K) = {0};
 
-struct hash_pte *Hash;
-static unsigned long Hash_size, Hash_mask;
-unsigned long _SDR1;
-static unsigned int hash_mb, hash_mb2;
+static struct hash_pte __initdata *Hash = (struct hash_pte *)early_hash;
+static unsigned long __initdata Hash_size, Hash_mask;
+static unsigned int __initdata hash_mb, hash_mb2;
+unsigned long __initdata _SDR1;
 
 struct ppc_bat BATS[8][2];	/* 8 pairs of IBAT, DBAT */
 
-struct batrange {		/* stores address ranges mapped by BATs */
+static struct batrange {	/* stores address ranges mapped by BATs */
 	unsigned long start;
 	unsigned long limit;
 	phys_addr_t phys;
 } bat_addrs[8];
 
+#ifdef CONFIG_SMP
+unsigned long mmu_hash_lock;
+#endif
+
 /*
  * Return PA for this VA if it is mapped by a BAT, or 0
  */
@@ -157,11 +161,9 @@ unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
 	unsigned long done;
 	unsigned long border = (unsigned long)__init_begin - PAGE_OFFSET;
 
-	if (__map_without_bats) {
-		pr_debug("RAM mapped without BATs\n");
-		return base;
-	}
-	if (debug_pagealloc_enabled()) {
+
+	if (debug_pagealloc_enabled() || __map_without_bats) {
+		pr_debug_once("Read-Write memory mapped without BATs\n");
 		if (base >= border)
 			return base;
 		if (top >= border)
@@ -304,11 +306,11 @@ void __init setbat(int index, unsigned long virt, phys_addr_t phys,
 /*
  * Preload a translation in the hash table
  */
-void hash_preload(struct mm_struct *mm, unsigned long ea)
+static void hash_preload(struct mm_struct *mm, unsigned long ea)
 {
 	pmd_t *pmd;
 
-	if (!Hash)
+	if (!mmu_has_feature(MMU_FTR_HPTE_TABLE))
 		return;
 	pmd = pmd_off(mm, ea);
 	if (!pmd_none(*pmd))
@@ -469,3 +471,7 @@ void __init setup_kuap(bool disabled)
 		pr_warn("KUAP cannot be disabled yet on 6xx when compiled in\n");
 }
 #endif
+
+void __init early_init_mmu(void)
+{
+}