12 files changed, 80 insertions, 20 deletions

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 39354365f54a..ed9883169190 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -197,7 +197,7 @@ $(obj)/empty.c:
 $(obj)/zImage.coff.lds $(obj)/zImage.ps3.lds : $(obj)/%: $(srctree)/$(src)/%.S
         $(Q)cp $< $@
 
-$(obj)/serial.c: $(obj)/autoconf.h
+$(srctree)/$(src)/serial.c: $(obj)/autoconf.h
 
 $(obj)/autoconf.h: $(obj)/%: $(objtree)/include/generated/%
         $(Q)cp $< $@
diff --git a/arch/powerpc/boot/crt0.S b/arch/powerpc/boot/crt0.S
index 32dfe6d083f3..9b9d17437373 100644
--- a/arch/powerpc/boot/crt0.S
+++ b/arch/powerpc/boot/crt0.S
@@ -15,7 +15,7 @@
 RELA = 7
 RELACOUNT = 0x6ffffff9
 
-        .text
+        .data
         /* A procedure descriptor used when booting this as a COFF file.
          * When making COFF, this comes first in the link and we're
          * linked at 0x500000.
@@ -23,6 +23,8 @@ RELACOUNT = 0x6ffffff9
         .globl  _zimage_start_opd
 _zimage_start_opd:
         .long   0x500000, 0, 0, 0
+        .text
+        b       _zimage_start
 
 #ifdef __powerpc64__
 .balign 8
diff --git a/arch/powerpc/include/asm/perf_event.h b/arch/powerpc/include/asm/perf_event.h
index 8bf1b6351716..16a49819da9a 100644
--- a/arch/powerpc/include/asm/perf_event.h
+++ b/arch/powerpc/include/asm/perf_event.h
@@ -26,6 +26,8 @@
 #include <asm/ptrace.h>
 #include <asm/reg.h>
 
+#define perf_arch_bpf_user_pt_regs(regs) &regs->user_regs
+
 /*
  * Overload regs->result to specify whether we should use the MSR (result
  * is zero) or the SIAR (result is non zero).
diff --git a/arch/powerpc/include/uapi/asm/Kbuild b/arch/powerpc/include/uapi/asm/Kbuild
index a658091a19f9..3712152206f3 100644
--- a/arch/powerpc/include/uapi/asm/Kbuild
+++ b/arch/powerpc/include/uapi/asm/Kbuild
@@ -1,7 +1,6 @@
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
-generic-y += bpf_perf_event.h
 generic-y += param.h
 generic-y += poll.h
 generic-y += resource.h
diff --git a/arch/powerpc/include/uapi/asm/bpf_perf_event.h b/arch/powerpc/include/uapi/asm/bpf_perf_event.h
new file mode 100644
index 000000000000..b551b741653d
--- /dev/null
+++ b/arch/powerpc/include/uapi/asm/bpf_perf_event.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__
+#define _UAPI__ASM_BPF_PERF_EVENT_H__
+
+#include <asm/ptrace.h>
+
+typedef struct user_pt_regs bpf_user_pt_regs_t;
+
+#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 33b34a58fc62..5b9dce17f0c9 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -372,6 +372,8 @@ void __init find_legacy_serial_ports(void)
 
         /* Now find out if one of these is out firmware console */
         path = of_get_property(of_chosen, "linux,stdout-path", NULL);
+        if (path == NULL)
+                path = of_get_property(of_chosen, "stdout-path", NULL);
         if (path != NULL) {
                 stdout = of_find_node_by_path(path);
                 if (stdout)
@@ -595,8 +597,10 @@ static int __init check_legacy_serial_console(void)
         /* We are getting a weird phandle from OF ... */
         /* ... So use the full path instead */
         name = of_get_property(of_chosen, "linux,stdout-path", NULL);
+        if (name == NULL)
+                name = of_get_property(of_chosen, "stdout-path", NULL);
         if (name == NULL) {
-                DBG(" no linux,stdout-path !\n");
+                DBG(" no stdout-path !\n");
                 return -ENODEV;
         }
         prom_stdout = of_find_node_by_path(name);
diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c
index dab616a33b8d..f2197654be07 100644
--- a/arch/powerpc/kernel/msi.c
+++ b/arch/powerpc/kernel/msi.c
@@ -34,5 +34,10 @@ void arch_teardown_msi_irqs(struct pci_dev *dev)
 {
         struct pci_controller *phb = pci_bus_to_host(dev->bus);
 
-        phb->controller_ops.teardown_msi_irqs(dev);
+        /*
+         * We can be called even when arch_setup_msi_irqs() returns -ENOSYS,
+         * so check the pointer again.
+         */
+        if (phb->controller_ops.teardown_msi_irqs)
+                phb->controller_ops.teardown_msi_irqs(dev);
 }
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index afb819f4ca68..714c3480c52d 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -3266,12 +3266,17 @@ long do_syscall_trace_enter(struct pt_regs *regs)
         user_exit();
 
         if (test_thread_flag(TIF_SYSCALL_EMU)) {
-                ptrace_report_syscall(regs);
                 /*
+                 * A nonzero return code from tracehook_report_syscall_entry()
+                 * tells us to prevent the syscall execution, but we are not
+                 * going to execute it anyway.
+                 *
                  * Returning -1 will skip the syscall execution. We want to
                  * avoid clobbering any register also, thus, not 'gotoing'
                  * skip label.
                  */
+                if (tracehook_report_syscall_entry(regs))
+                        ;
                 return -1;
         }
 
diff --git a/arch/powerpc/mm/dump_linuxpagetables.c b/arch/powerpc/mm/dump_linuxpagetables.c
index 2b74f8adf4d0..6aa41669ac1a 100644
--- a/arch/powerpc/mm/dump_linuxpagetables.c
+++ b/arch/powerpc/mm/dump_linuxpagetables.c
@@ -19,6 +19,7 @@
 #include <linux/hugetlb.h>
 #include <linux/io.h>
 #include <linux/mm.h>
+#include <linux/highmem.h>
 #include <linux/sched.h>
 #include <linux/seq_file.h>
 #include <asm/fixmap.h>
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 7a9886f98b0c..a5091c034747 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -188,15 +188,20 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
         pr_debug("vmemmap_populate %lx..%lx, node %d\n", start, end, node);
 
         for (; start < end; start += page_size) {
-                void *p;
+                void *p = NULL;
                 int rc;
 
                 if (vmemmap_populated(start, page_size))
                         continue;
 
+                /*
+                 * Allocate from the altmap first if we have one. This may
+                 * fail due to alignment issues when using 16MB hugepages, so
+                 * fall back to system memory if the altmap allocation fail.
+                 */
                 if (altmap)
                         p = altmap_alloc_block_buf(page_size, altmap);
-                else
+                if (!p)
                         p = vmemmap_alloc_block_buf(page_size, node);
                 if (!p)
                         return -ENOMEM;
@@ -255,8 +260,15 @@ void __ref vmemmap_free(unsigned long start, unsigned long end,
 {