Merge tag 'powerpc-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "This is a bit late, partly due to me travelling, and partly due to a
  power outage knocking out some of my test systems *while* I was
  travelling.

   - Initial support for running on a system with an Ultravisor, which
     is software that runs below the hypervisor and protects guests
     against some attacks by the hypervisor.

   - Support for building the kernel to run as a "Secure Virtual
     Machine", ie. as a guest capable of running on a system with an
     Ultravisor.

   - Some changes to our DMA code on bare metal, to allow devices with
     medium sized DMA masks (> 32 && < 59 bits) to use more than 2GB of
     DMA space.

   - Support for firmware assisted crash dumps on bare metal (powernv).

   - Two series fixing bugs in and refactoring our PCI EEH code.

   - A large series refactoring our exception entry code to use gas
     macros, both to make it more readable and also enable some future
     optimisations.

  As well as many cleanups and other minor features & fixups.

  Thanks to: Adam Zerella, Alexey Kardashevskiy, Alistair Popple, Andrew
  Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anshuman Khandual,
  Balbir Singh, Benjamin Herrenschmidt, Cédric Le Goater, Christophe
  JAILLET, Christophe Leroy, Christopher M. Riedl, Christoph Hellwig,
  Claudio Carvalho, Daniel Axtens, David Gibson, David Hildenbrand,
  Desnes A. Nunes do Rosario, Ganesh Goudar, Gautham R. Shenoy, Greg
  Kurz, Guerney Hunt, Gustavo Romero, Halil Pasic, Hari Bathini, Joakim
  Tjernlund, Jonathan Neuschafer, Jordan Niethe, Leonardo Bras, Lianbo
  Jiang, Madhavan Srinivasan, Mahesh Salgaonkar, Mahesh Salgaonkar,
  Masahiro Yamada, Maxiwell S. Garcia, Michael Anderson, Nathan
  Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Oliver
  O'Halloran, Qian Cai, Ram Pai, Ravi Bangoria, Reza Arbab, Ryan Grimm,
  Sam Bobroff, Santosh Sivaraj, Segher Boessenkool, Sukadev Bhattiprolu,
  Thiago Bauermann, Thiago Jung Bauermann, Thomas Gleixner, Tom
  Lendacky, Vasant Hegde"

* tag 'powerpc-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (264 commits)
  powerpc/mm/mce: Keep irqs disabled during lockless page table walk
  powerpc: Use ftrace_graph_ret_addr() when unwinding
  powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
  ftrace: Look up the address of return_to_handler() using helpers
  powerpc: dump kernel log before carrying out fadump or kdump
  docs: powerpc: Add missing documentation reference
  powerpc/xmon: Fix output of XIVE IPI
  powerpc/xmon: Improve output of XIVE interrupts
  powerpc/mm/radix: remove useless kernel messages
  powerpc/fadump: support holes in kernel boot memory area
  powerpc/fadump: remove RMA_START and RMA_END macros
  powerpc/fadump: update documentation about option to release opalcore
  powerpc/fadump: consider f/w load area
  powerpc/opalcore: provide an option to invalidate /sys/firmware/opal/core file
  powerpc/opalcore: export /sys/firmware/opal/core for analysing opal crashes
  powerpc/fadump: update documentation about CONFIG_PRESERVE_FA_DUMP
  powerpc/fadump: add support to preserve crash data on FADUMP disabled kernel
  powerpc/fadump: improve how crashed kernel's memory is reserved
  powerpc/fadump: consider reserved ranges while releasing memory
  powerpc/fadump: make crash memory ranges array allocation generic
  ...

1 files changed, 15 insertions, 65 deletions

diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index b4ca9e95e678..3a1fbf9cb8f8 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -27,25 +27,13 @@
 #include <asm/sections.h>
 #include <asm/trace.h>
 #include <asm/uaccess.h>
+#include <asm/ultravisor.h>
 
 #include <trace/events/thp.h>
 
 unsigned int mmu_pid_bits;
 unsigned int mmu_base_pid;
 
-static int native_register_process_table(unsigned long base, unsigned long pg_sz,
-					 unsigned long table_size)
-{
-	unsigned long patb0, patb1;
-
-	patb0 = be64_to_cpu(partition_tb[0].patb0);
-	patb1 = base | table_size | PATB_GR;
-
-	mmu_partition_table_set_entry(0, patb0, patb1);
-
-	return 0;
-}
-
 static __ref void *early_alloc_pgtable(unsigned long size, int nid,
 			unsigned long region_start, unsigned long region_end)
 {
@@ -380,18 +368,6 @@ static void __init radix_init_pgtable(void)
 	 */
 	rts_field = radix__get_tree_size();
 	process_tb->prtb0 = cpu_to_be64(rts_field | __pa(init_mm.pgd) | RADIX_PGD_INDEX_SIZE);
-	/*
-	 * Fill in the partition table. We are suppose to use effective address
-	 * of process table here. But our linear mapping also enable us to use
-	 * physical address here.
-	 */
-	register_process_table(__pa(process_tb), 0, PRTB_SIZE_SHIFT - 12);
-	pr_info("Process table %p and radix root for kernel: %p\n", process_tb, init_mm.pgd);
-	asm volatile("ptesync" : : : "memory");
-	asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : :
-		     "r" (TLBIEL_INVAL_SET_LPID), "r" (0));
-	asm volatile("eieio; tlbsync; ptesync" : : : "memory");
-	trace_tlbie(0, 0, TLBIEL_INVAL_SET_LPID, 0, 2, 1, 1);
 
 	/*
 	 * The init_mm context is given the first available (non-zero) PID,
@@ -412,20 +388,15 @@ static void __init radix_init_pgtable(void)
 
 static void __init radix_init_partition_table(void)
 {
-	unsigned long rts_field, dw0;
+	unsigned long rts_field, dw0, dw1;
 
 	mmu_partition_table_init();
 	rts_field = radix__get_tree_size();
 	dw0 = rts_field | __pa(init_mm.pgd) | RADIX_PGD_INDEX_SIZE | PATB_HR;
-	mmu_partition_table_set_entry(0, dw0, 0);
+	dw1 = __pa(process_tb) | (PRTB_SIZE_SHIFT - 12) | PATB_GR;
+	mmu_partition_table_set_entry(0, dw0, dw1, false);
 
 	pr_info("Initializing Radix MMU\n");
-	pr_info("Partition table %p\n", partition_tb);
-}
-
-void __init radix_init_native(void)
-{
-	register_process_table = native_register_process_table;
 }
 
 static int __init get_idx_from_shift(unsigned int shift)
@@ -621,8 +592,9 @@ void __init radix__early_init_mmu(void)
 	__pmd_frag_nr = RADIX_PMD_FRAG_NR;
 	__pmd_frag_size_shift = RADIX_PMD_FRAG_SIZE_SHIFT;
 
+	radix_init_pgtable();
+
 	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
-		radix_init_native();
 		lpcr = mfspr(SPRN_LPCR);
 		mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
 		radix_init_partition_table();
@@ -633,11 +605,9 @@ void __init radix__early_init_mmu(void)
 
 	memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE);
 
-	radix_init_pgtable();
 	/* Switch to the guard PID before turning on MMU */
 	radix__switch_mmu_context(NULL, &init_mm);
-	if (cpu_has_feature(CPU_FTR_HVMODE))
-		tlbiel_all();
+	tlbiel_all();
 }
 
 void radix__early_init_mmu_secondary(void)
@@ -650,14 +620,14 @@ void radix__early_init_mmu_secondary(void)
 		lpcr = mfspr(SPRN_LPCR);
 		mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
 
-		mtspr(SPRN_PTCR,
-		      __pa(partition_tb) | (PATB_SIZE_SHIFT - 12));
+		set_ptcr_when_no_uv(__pa(partition_tb) |
+				    (PATB_SIZE_SHIFT - 12));
+
 		radix_init_amor();
 	}
 
 	radix__switch_mmu_context(NULL, &init_mm);
-	if (cpu_has_feature(CPU_FTR_HVMODE))
-		tlbiel_all();
+	tlbiel_all();
 }
 
 void radix__mmu_cleanup_all(void)
@@ -667,7 +637,7 @@ void radix__mmu_cleanup_all(void)
 	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
 		lpcr = mfspr(SPRN_LPCR);
 		mtspr(SPRN_LPCR, lpcr & ~LPCR_UPRT);
-		mtspr(SPRN_PTCR, 0);
+		set_ptcr_when_no_uv(0);
 		powernv_set_nmmu_ptcr(0);
 		radix__flush_tlb_all();
 	}
@@ -737,8 +707,8 @@ static int __meminit stop_machine_change_mapping(void *data)
 
 	spin_unlock(&init_mm.page_table_lock);
 	pte_clear(&init_mm, params->aligned_start, params->pte);
-	create_physical_mapping(params->aligned_start, params->start, -1);
-	create_physical_mapping(params->end, params->aligned_end, -1);
+	create_physical_mapping(__pa(params->aligned_start), __pa(params->start), -1);
+	create_physical_mapping(__pa(params->end), __pa(params->aligned_end), -1);
 	spin_lock(&init_mm.page_table_lock);
 	return 0;
 }
@@ -902,7 +872,7 @@ int __meminit radix__create_section_mapping(unsigned long start, unsigned long e
 		return -1;
 	}
 
-	return create_physical_mapping(start, end, nid);
+	return create_physical_mapping(__pa(start), __pa(end), nid);
 }
 
 int __meminit radix__remove_section_mapping(unsigned long start, unsigned long end)
@@ -1218,26 +1188,6 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
 	return 1;
 }
 
-int radix__ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size,
-			pgprot_t prot, int nid)
-{
-	if (likely(slab_is_available())) {
-		int err = ioremap_page_range(ea, ea + size, pa, prot);
-		if (err)
-			unmap_kernel_range(ea, size);
-		return err;
-	} else {
-		unsigned long i;
-
-		for (i = 0; i < size; i += PAGE_SIZE) {
-			int err = map_kernel_page(ea + i, pa + i, prot);
-			if (WARN_ON_ONCE(err)) /* Should clean up */
-				return err;
-		}
-		return 0;
-	}
-}
-
 int __init arch_ioremap_p4d_supported(void)
 {
 	return 0;