Merge tag 'powerpc-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - A series from Nick adding ARCH_WANT_IRQS_OFF_ACTIVATE_MM & selecting
   it for powerpc, as well as a related fix for sparc.

 - Remove support for PowerPC 601.

 - Some fixes for watchpoints & addition of a new ptrace flag for
   detecting ISA v3.1 (Power10) watchpoint features.

 - A fix for kernels using 4K pages and the hash MMU on bare metal
   Power9 systems with > 16TB of RAM, or RAM on the 2nd node.

 - A basic idle driver for shallow stop states on Power10.

 - Tweaks to our sched domains code to better inform the scheduler about
   the hardware topology on Power9/10, where two SMT4 cores can be
   presented by firmware as an SMT8 core.

 - A series doing further reworks & cleanups of our EEH code.

 - Addition of a filter for RTAS (firmware) calls done via sys_rtas(),
   to prevent root from overwriting kernel memory.

 - Other smaller features, fixes & cleanups.

Thanks to: Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V,
Athira Rajeev, Biwen Li, Cameron Berkenpas, Cédric Le Goater, Christophe
Leroy, Christoph Hellwig, Colin Ian King, Daniel Axtens, David Dai, Finn
Thain, Frederic Barrat, Gautham R. Shenoy, Greg Kurz, Gustavo Romero,
Ira Weiny, Jason Yan, Joel Stanley, Jordan Niethe, Kajol Jain, Konrad
Rzeszutek Wilk, Laurent Dufour, Leonardo Bras, Liu Shixin, Luca
Ceresoli, Madhavan Srinivasan, Mahesh Salgaonkar, Nathan Lynch, Nicholas
Mc Guire, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Pedro
Miraglia Franco de Carvalho, Pratik Rajesh Sampat, Qian Cai, Qinglang
Miao, Ravi Bangoria, Russell Currey, Satheesh Rajendran, Scott Cheloha,
Segher Boessenkool, Srikar Dronamraju, Stan Johnson, Stephen Kitt,
Stephen Rothwell, Thiago Jung Bauermann, Tyrel Datwyler, Vaibhav Jain,
Vaidyanathan Srinivasan, Vasant Hegde, Wang Wensheng, Wolfram Sang, Yang
Yingliang, zhengbin.

* tag 'powerpc-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (228 commits)
  Revert "powerpc/pci: unmap legacy INTx interrupts when a PHB is removed"
  selftests/powerpc: Fix eeh-basic.sh exit codes
  cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_reboot_notifier
  powerpc/time: Make get_tb() common to PPC32 and PPC64
  powerpc/time: Make get_tbl() common to PPC32 and PPC64
  powerpc/time: Remove get_tbu()
  powerpc/time: Avoid using get_tbl() and get_tbu() internally
  powerpc/time: Make mftb() common to PPC32 and PPC64
  powerpc/time: Rename mftbl() to mftb()
  powerpc/32s: Remove #ifdef CONFIG_PPC_BOOK3S_32 in head_book3s_32.S
  powerpc/32s: Rename head_32.S to head_book3s_32.S
  powerpc/32s: Setup the early hash table at all time.
  powerpc/time: Remove ifdef in get_dec() and set_dec()
  powerpc: Remove get_tb_or_rtc()
  powerpc: Remove __USE_RTC()
  powerpc: Tidy up a bit after removal of PowerPC 601.
  powerpc: Remove support for PowerPC 601
  powerpc: Remove PowerPC 601
  powerpc: Drop SYNC_601() ISYNC_601() and SYNC()
  powerpc: Remove CONFIG_PPC601_SYNC_FIX
  ...

29 files changed, 459 insertions, 76 deletions

diff --git a/tools/testing/selftests/powerpc/alignment/alignment_handler.c b/tools/testing/selftests/powerpc/alignment/alignment_handler.c
index 55ef15184057..2a0503bc7e49 100644
--- a/tools/testing/selftests/powerpc/alignment/alignment_handler.c
+++ b/tools/testing/selftests/powerpc/alignment/alignment_handler.c
@@ -55,8 +55,6 @@
 #include <setjmp.h>
 #include <signal.h>
 
-#include <asm/cputable.h>
-
 #include "utils.h"
 #include "instructions.h"
 
@@ -64,6 +62,7 @@ int bufsize;
 int debug;
 int testing;
 volatile int gotsig;
+bool prefixes_enabled;
 char *cipath = "/dev/fb0";
 long cioffset;
 
@@ -77,7 +76,12 @@ void sighandler(int sig, siginfo_t *info, void *ctx)
 	}
 	gotsig = sig;
 #ifdef __powerpc64__
-	ucp->uc_mcontext.gp_regs[PT_NIP] += 4;
+	if (prefixes_enabled) {
+		u32 inst = *(u32 *)ucp->uc_mcontext.gp_regs[PT_NIP];
+		ucp->uc_mcontext.gp_regs[PT_NIP] += ((inst >> 26 == 1) ? 8 : 4);
+	} else {
+		ucp->uc_mcontext.gp_regs[PT_NIP] += 4;
+	}
 #else
 	ucp->uc_mcontext.uc_regs->gregs[PT_NIP] += 4;
 #endif
@@ -648,6 +652,8 @@ int main(int argc, char *argv[])
 		exit(1);
 	}
 
+	prefixes_enabled = have_hwcap2(PPC_FEATURE2_ARCH_3_1);
+
 	rc |= test_harness(test_alignment_handler_vsx_206,
 			   "test_alignment_handler_vsx_206");
 	rc |= test_harness(test_alignment_handler_vsx_207,
diff --git a/tools/testing/selftests/powerpc/benchmarks/context_switch.c b/tools/testing/selftests/powerpc/benchmarks/context_switch.c
index d50cc05df495..96554e2794d1 100644
--- a/tools/testing/selftests/powerpc/benchmarks/context_switch.c
+++ b/tools/testing/selftests/powerpc/benchmarks/context_switch.c
@@ -481,6 +481,12 @@ int main(int argc, char *argv[])
 	else
 		printf("futex");
 
+	if (!have_hwcap(PPC_FEATURE_HAS_ALTIVEC))
+		touch_altivec = 0;
+
+	if (!have_hwcap(PPC_FEATURE_HAS_VSX))
+		touch_vector = 0;
+
 	printf(" on cpus %d/%d touching FP:%s altivec:%s vector:%s vdso:%s\n",
 	       cpu1, cpu2, touch_fp ?  "yes" : "no", touch_altivec ? "yes" : "no",
 	       touch_vector ? "yes" : "no", touch_vdso ? "yes" : "no");
diff --git a/tools/testing/selftests/powerpc/dscr/Makefile b/tools/testing/selftests/powerpc/dscr/Makefile
index cfa6eedcb66c..845db6273a1b 100644
--- a/tools/testing/selftests/powerpc/dscr/Makefile
+++ b/tools/testing/selftests/powerpc/dscr/Makefile
@@ -10,4 +10,4 @@ include ../../lib.mk
 
 $(OUTPUT)/dscr_default_test: LDLIBS += -lpthread
 
-$(TEST_GEN_PROGS): ../harness.c
+$(TEST_GEN_PROGS): ../harness.c ../utils.c
diff --git a/tools/testing/selftests/powerpc/dscr/dscr_default_test.c b/tools/testing/selftests/powerpc/dscr/dscr_default_test.c
index 288a4e2ad156..e76611e608af 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr_default_test.c
+++ b/tools/testing/selftests/powerpc/dscr/dscr_default_test.c
@@ -63,6 +63,8 @@ int dscr_default(void)
 	unsigned long i, *status[THREADS];
 	unsigned long orig_dscr_default;
 
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR));
+
 	orig_dscr_default = get_default_dscr();
 
 	/* Initial DSCR default */
diff --git a/tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c b/tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c
index aefcd8d8759b..32fcf2b324b1 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c
+++ b/tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c
@@ -21,6 +21,8 @@ int dscr_explicit(void)
 {
 	unsigned long i, dscr = 0;
 
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR));
+
 	srand(getpid());
 	set_dscr(dscr);
 
diff --git a/tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c b/tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c
index 7c1cb46397c6..c6a81b2d6b91 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c
+++ b/tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c
@@ -44,6 +44,8 @@ int dscr_inherit_exec(void)
 	unsigned long i, dscr = 0;
 	pid_t pid;
 
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR));
+
 	for (i = 0; i < COUNT; i++) {
 		dscr++;
 		if (dscr > DSCR_MAX)
diff --git a/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c b/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c
index 04297a69ab59..f9dfd3d3c2d5 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c
+++ b/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c
@@ -22,6 +22,8 @@ int dscr_inherit(void)
 	unsigned long i, dscr = 0;
 	pid_t pid;
 
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR));
+
 	srand(getpid());
 	set_dscr(dscr);
 
diff --git a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c
index 02f6b4efde14..fbbdffdb2e5d 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c
+++ b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c
@@ -77,6 +77,8 @@ int dscr_sysfs(void)
 	unsigned long orig_dscr_default;
 	int i, j;
 
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR));
+
 	orig_dscr_default = get_default_dscr();
 	for (i = 0; i < COUNT; i++) {
 		for (j = 0; j < DSCR_MAX; j++) {
diff --git a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c
index 37be2c25f277..191ed126f118 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c
+++ b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c
@@ -56,6 +56,8 @@ int dscr_sysfs_thread(void)
 	unsigned long orig_dscr_default;
 	int i, j;
 
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR));
+
 	orig_dscr_default = get_default_dscr();
 	for (i = 0; i < COUNT; i++) {
 		for (j = 0; j < DSCR_MAX; j++) {
diff --git a/tools/testing/selftests/powerpc/dscr/dscr_user_test.c b/tools/testing/selftests/powerpc/dscr/dscr_user_test.c
index eaf785d11eed..e09072446dd3 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr_user_test.c
+++ b/tools/testing/selftests/powerpc/dscr/dscr_user_test.c
@@ -36,6 +36,8 @@ int dscr_user(void)
 {
 	int i;
 
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR));
+
 	check_dscr("");
 
 	for (i = 0; i < COUNT; i++) {
diff --git a/tools/testing/selftests/powerpc/eeh/eeh-basic.sh b/tools/testing/selftests/powerpc/eeh/eeh-basic.sh
index 8a8d0f456946..0d783e1065c8 100755
--- a/tools/testing/selftests/powerpc/eeh/eeh-basic.sh
+++ b/tools/testing/selftests/powerpc/eeh/eeh-basic.sh
@@ -1,17 +1,19 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0-only
 
+KSELFTESTS_SKIP=4
+
 . ./eeh-functions.sh
 
 if ! eeh_supported ; then
 	echo "EEH not supported on this system, skipping"
-	exit 0;
+	exit $KSELFTESTS_SKIP;
 fi
 
 if [ ! -e "/sys/kernel/debug/powerpc/eeh_dev_check" ] && \
    [ ! -e "/sys/kernel/debug/powerpc/eeh_dev_break" ] ; then
 	echo "debugfs EEH testing files are missing. Is debugfs mounted?"
-	exit 1;
+	exit $KSELFTESTS_SKIP;
 fi
 
 pre_lspci=`mktemp`
@@ -84,4 +86,5 @@ echo "$failed devices failed to recover ($dev_count tested)"
 lspci | diff -u $pre_lspci -
 rm -f $pre_lspci
 
-exit $failed
+test "$failed" == 0
+exit $?
diff --git a/tools/testing/selftests/powerpc/include/utils.h b/tools/testing/selftests/powerpc/include/utils.h
index 71d2924f5b8b..052b5a775dc2 100644
--- a/tools/testing/selftests/powerpc/include/utils.h
+++ b/tools/testing/selftests/powerpc/include/utils.h
@@ -12,6 +12,7 @@
 #include <stdbool.h>
 #include <linux/auxvec.h>
 #include <linux/perf_event.h>
+#include <asm/cputable.h>
 #include "reg.h"
 
 /* Avoid headaches with PRI?64 - just use %ll? always */
@@ -35,7 +36,6 @@ int pick_online_cpu(void);
 int read_debugfs_file(char *debugfs_file, int *result);
 int write_debugfs_file(char *debugfs_file, int result);
 int read_sysfs_file(char *debugfs_file, char *result, size_t result_size);
-void set_dscr(unsigned long val);
 int perf_event_open_counter(unsigned int type,
 			    unsigned long config, int group_fd);
 int perf_event_enable(int fd);
diff --git a/tools/testing/selftests/powerpc/mm/bad_accesses.c b/tools/testing/selftests/powerpc/mm/bad_accesses.c
index a864ed7e2008..fd747b2ffcfc 100644
--- a/tools/testing/selftests/powerpc/mm/bad_accesses.c
+++ b/tools/testing/selftests/powerpc/mm/bad_accesses.c
@@ -139,5 +139,6 @@ static int test(void)
 
 int main(void)
 {
+	test_harness_set_timeout(300);
 	return test_harness(test, "bad_accesses");
 }
diff --git a/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c b/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c
index 2980abca31e0..2070a1e2b3a5 100644
--- a/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c
+++ b/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c
@@ -9,7 +9,6 @@
 #include <stdbool.h>
 #include <string.h>
 #include <sys/prctl.h>
-#include <asm/cputable.h>
 
 #include "event.h"
 #include "utils.h"
diff --git a/tools/testing/selftests/powerpc/pmu/l3_bank_test.c b/tools/testing/selftests/powerpc/pmu/l3_bank_test.c
index a96d512a18c4..a5dfa9bf3b9f 100644
--- a/tools/testing/selftests/powerpc/pmu/l3_bank_test.c
+++ b/tools/testing/selftests/powerpc/pmu/l3_bank_test.c
@@ -20,6 +20,9 @@ static int l3_bank_test(void)
 	char *p;
 	int i;
 
+	// The L3 bank logic is only used on Power8 or later
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07));
+
 	p = malloc(MALLOC_SIZE);
 	FAIL_IF(!p);
 
diff --git a/tools/testing/selftests/powerpc/pmu/per_event_excludes.c b/tools/testing/selftests/powerpc/pmu/per_event_excludes.c
index 2d37942bf72b..ad32a09a6540 100644
--- a/tools/testing/selftests/powerpc/pmu/per_event_excludes.c
+++ b/tools/testing/selftests/powerpc/pmu/per_event_excludes.c
@@ -12,8 +12,6 @@
 #include <string.h>
 #include <sys/prctl.h>
 
-#include <asm/cputable.h>
-
 #include "event.h"
 #include "lib.h"
 #include "utils.h"
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c b/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
index fc477dfe86a2..2e0d86e0687e 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
@@ -20,6 +20,8 @@
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <sys/syscall.h>
+#include <linux/limits.h>
 #include "ptrace.h"
 
 #define SPRN_PVR	0x11F
@@ -44,6 +46,7 @@ struct gstruct {
 };
 static volatile struct gstruct gstruct __attribute__((aligned(512)));
 
+static volatile char cwd[PATH_MAX] __attribute__((aligned(8)));
 
 static void get_dbginfo(pid_t child_pid, struct ppc_debug_info *dbginfo)
 {
@@ -138,6 +141,9 @@ static void test_workload(void)
 			write_var(len);
 	}
 
+	/* PTRACE_SET_DEBUGREG, Kernel Access Userspace test */
+	syscall(__NR_getcwd, &cwd, PATH_MAX);
+
 	/* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, WO test */
 	write_var(1);
 
@@ -150,6 +156,9 @@ static void test_workload(void)
 	else
 		read_var(1);
 
+	/* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, Kernel Access Userspace test */
+	syscall(__NR_getcwd, &cwd, PATH_MAX);
+
 	/* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, WO test */
 	gstruct.a[rand() % A_LEN] = 'a';
 
@@ -293,6 +302,24 @@ static int test_set_debugreg(pid_t child_pid)
 	return 0;
 }
 
+static int test_set_debugreg_kernel_userspace(pid_t child_pid)
+{
+	unsigned long wp_addr = (unsigned long)cwd;
+	char *name = "PTRACE_SET_DEBUGREG";
+
+	/* PTRACE_SET_DEBUGREG, Kernel Access Userspace test */
+	wp_addr &= ~0x7UL;
+	wp_addr |= (1Ul << DABR_READ_SHIFT);
+	wp_addr |= (1UL << DABR_WRITE_SHIFT);
+	wp_addr |= (1UL << DABR_TRANSLATION_SHIFT);
+	ptrace_set_debugreg(child_pid, wp_addr);
+	ptrace(PTRACE_CONT, child_pid, NULL, 0);
+	check_success(child_pid, name, "Kernel Access Userspace", wp_addr, 8);
+
+	ptrace_set_debugreg(child_pid, 0);
+	return 0;
+}
+
 static void get_ppc_hw_breakpoint(struct ppc_hw_breakpoint *info, int type,
 				  unsigned long addr, int len)
 {
@@ -338,6 +365,22 @@ static void test_sethwdebug_exact(pid_t child_pid)
 	ptrace_delhwdebug(child_pid, wh);
 }
 
+static void test_sethwdebug_exact_kernel_userspace(pid_t child_pid)
+{
+	struct ppc_hw_breakpoint info;
+	unsigned long wp_addr = (unsigned long)&cwd;
+	char *name = "PPC_PTRACE_SETHWDEBUG, MODE_EXACT";
+	int len = 1; /* hardcoded in kernel */
+	int wh;
+
+	/* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, Kernel Access Userspace test */
+	get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr, 0);
+	wh = ptrace_sethwdebug(child_pid, &info);
+	ptrace(PTRACE_CONT, child_pid, NULL, 0);
+	check_success(child_pid, name, "Kernel Access Userspace", wp_addr, len);
+	ptrace_delhwdebug(child_pid, wh);
+}
+
 static void test_sethwdebug_range_aligned(pid_t child_pid)
 {
 	struct ppc_hw_breakpoint info;
@@ -452,9 +495,10 @@ static void
 run_tests(pid_t child_pid, struct ppc_debug_info *dbginfo, bool dawr)
 {
 	test_set_debugreg(child_pid);
+	test_set_debugreg_kernel_userspace(child_pid);
+	test_sethwdebug_exact(child_pid);
+	test_sethwdebug_exact_kernel_userspace(child_pid);
 	if (dbginfo->features & PPC_DEBUG_FEATURE_DATA_BP_RANGE) {
-		test_sethwdebug_exact(child_pid);
-
 		test_sethwdebug_range_aligned(child_pid);
 		if (dawr || is_8xx) {
 			test_sethwdebug_range_unaligned(child_pid);
diff --git a/tools/testing/selftests/powerpc/security/rfi_flush.c b/tools/testing/selftests/powerpc/security/rfi_flush.c
index 0a7d0afb26b8..93a65bd1f231 100644
--- a/tools/testing/selftests/powerpc/security/rfi_flush.c
+++ b/tools/testing/selftests/powerpc/security/rfi_flush.c
@@ -10,6 +10,7 @@
 #include <stdint.h>
 #include <malloc.h>
 #include <unistd.h>
+#include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ -41,6 +42,40 @@ static void syscall_loop(char *p, unsigned long iterations,
 	}
 }
 
+static void sigill_handler(int signr, siginfo_t *info, void *unused)
+{
+	static int warned = 0;
+	ucontext_t *ctx = (ucontext_t *)unused;
+	unsigned long *pc = &UCONTEXT_NIA(ctx);
+
+	/* mtspr 3,RS to check for move to DSCR below */
+	if ((*((unsigned int *)*pc) & 0xfc1fffff) == 0x7c0303a6) {
+		if (!warned++)
+			printf("WARNING: Skipping over dscr setup. Consider running 'ppc64_cpu --dscr=1' manually.\n");
+		*pc += 4;
+	} else {
+		printf("SIGILL at %p\n", pc);
+		abort();
+	}
+}
+
+static void set_dscr(unsigned long val)
+{
+	static int init = 0;
+	struct sigaction sa;
+
+	if (!init) {
+		memset(&sa, 0, sizeof(sa));
+		sa.sa_sigaction = sigill_handler;
+		sa.sa_flags = SA_SIGINFO;
+		if (sigaction(SIGILL, &sa, NULL))
+			perror("sigill_handler");
+		init = 1;
+	}
+
+	asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
+}
+
 int rfi_flush_test(void)
 {
 	char *p;
@@ -54,6 +89,9 @@ int rfi_flush_test(void)
 
 	SKIP_IF(geteuid() != 0);
 
+	// The PMU event we use only works on Power7 or later
+	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
+
 	if (read_debugfs_file("powerpc/rfi_flush", &rfi_flush_org)) {
 		perror("Unable to read powerpc/rfi_flush debugfs file");
 		SKIP_IF(1);
diff --git a/tools/testing/selftests/powerpc/security/spectre_v2.c b/tools/testing/selftests/powerpc/security/spectre_v2.c
index c8d82b784102..adc2b7294e5f 100644
--- a/tools/testing/selftests/powerpc/security/spectre_v2.c
+++ b/tools/testing/selftests/powerpc/security/spectre_v2.c
@@ -134,6 +134,9 @@ int spectre_v2_test(void)
 	s64 miss_percent;
 	bool is_p9;
 
+	// The PMU events we use only work on Power8 or later
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07));
+
 	state = get_sysfs_state();
 	if (state == UNKNOWN) {
 		printf("Error: couldn't determine spectre_v2 mitigation state?\n");
diff --git a/tools/testing/selftests/powerpc/stringloops/memcmp.c b/tools/testing/selftests/powerpc/stringloops/memcmp.c
index 979df3d98368..cb2f18855c8d 100644
--- a/tools/testing/selftests/powerpc/stringloops/memcmp.c
+++ b/tools/testing/selftests/powerpc/stringloops/memcmp.c
@@ -4,7 +4,7 @@
 #include <string.h>
 #include <sys/mman.h>
 #include <time.h>
-#include <asm/cputable.h>
+
 #include "utils.h"
 
 #define SIZE 256
diff --git a/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S b/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S
index cc4930467235..7887f78cf072 100644
--- a/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S
+++ b/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S
@@ -3,9 +3,13 @@
 
 	.data
 	.balign 8
-message:
+success_message:
 	.ascii "success: switch_endian_test\n\0"
 
+	.balign 8
+failure_message:
+	.ascii "failure: switch_endian_test\n\0"
+
 	.section ".toc"
 	.balign 8
 pattern:
@@ -64,6 +68,9 @@ FUNC_START(_start)
 	li r0, __NR_switch_endian
 	sc
 
+	tdi   0, 0, 0x48	// b +8 if the endian was switched
+	b     .Lfail	  	// exit if endian didn't switch
+
 #include "check-reversed.S"
 
 	/* Flip back, r0 already has the switch syscall number */
@@ -71,12 +78,20 @@ FUNC_START(_start)
 
 #include "check.S"
 
+	ld	r4, success_message@got(%r2)
+	li	r5, 28	// strlen(success_message)
+	li	r14, 0	// exit status
+.Lout:
 	li	r0, __NR_write
 	li	r3, 1	/* stdout */
-	ld	r4, message@got(%r2)
-	li	r5, 28	/* strlen(message3) */
 	sc
 	li      r0, __NR_exit
-	li	r3, 0
+	mr	r3, r14
 	sc
 	b       .
+
+.Lfail:
+	ld	r4, failure_message@got(%r2)
+	li	r5, 28	// strlen(failure_message)
+	li	r14, 1
+	b	.Lout
diff --git a/tools/testing/selftests/powerpc/syscalls/Makefile b/tools/testing/selftests/powerpc/syscalls/Makefile
index 01b22775ca87..b63f8459c704 100644
--- a/tools/testing/selftests/powerpc/syscalls/Makefile
+++ b/tools/testing/selftests/powerpc/syscalls/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
-TEST_GEN_PROGS := ipc_unmuxed
+TEST_GEN_PROGS := ipc_unmuxed rtas_filter
 
 CFLAGS += -I../../../../../usr/include
 
diff --git a/tools/testing/selftests/powerpc/syscalls/rtas_filter.c b/tools/testing/selftests/powerpc/syscalls/rtas_filter.c
new file mode 100644
index 000000000000..03b487f18d00
--- /dev/null
+++ b/tools/testing/selftests/powerpc/syscalls/rtas_filter.c
@@ -0,0 +1,285 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2005-2020 IBM Corporation.
+ *
+ * Includes code from librtas (https://github.com/ibm-power-utilities/librtas/)
+ */
+
+#include <byteswap.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "utils.h"
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define cpu_to_be32(x)		bswap_32(x)
+#define be32_to_cpu(x)		bswap_32(x)
+#else
+#define cpu_to_be32(x)		(x)
+#define be32_to_cpu(x)		(x)
+#endif
+
+#define RTAS_IO_ASSERT	-1098	/* Unexpected I/O Error */
+#define RTAS_UNKNOWN_OP -1099	/* No Firmware Implementation of Function */
+#define BLOCK_SIZE 4096
+#define PAGE_SIZE 4096
+#define MAX_PAGES 64
+
+static const char *ofdt_rtas_path = "/proc/device-tree/rtas";
+
+typedef __be32 uint32_t;
+struct rtas_args {
+	__be32 token;
+	__be32 nargs;
+	__be32 nret;
+	__be32 args[16];
+	__be32 *rets;	  /* Pointer to return values in args[]. */
+};
+
+struct region {
+	uint64_t addr;
+	uint32_t size;
+	struct region *next;
+};
+
+int read_entire_file(int fd, char **buf, size_t *len)
+{
+	size_t buf_size = 0;
+	size_t off = 0;
+	int rc;
+
+	*buf = NULL;
+	do {
+		buf_size += BLOCK_SIZE;
+		if (*buf == NULL)
+			*buf = malloc(buf_size);
+		else
+			*buf = realloc(*buf, buf_size);
+
+		if (*buf == NULL)
+			return -ENOMEM;
+
+		rc = read(fd, *buf + off, BLOCK_SIZE);
+		if (rc < 0)
+			return -EIO;
+
+		off += rc;
+	} while (rc == BLOCK_SIZE);
+
+	if (len)
+		*len = off;
+
+	return 0;
+}
+
+static int open_prop_file(const char *prop_path, const char *prop_name, int *fd)
+{
+	char *path;
+	int len;
+
+	/* allocate enough for two string, a slash and trailing NULL */
+	len = strlen(prop_path) + strlen(prop_name) + 1 + 1;
+	path = malloc(len);
+	if (path == NULL)
+		return -ENOMEM;
+
+	snprintf(path, len, "%s/%s", prop_path, prop_name);
+
+	*fd = open(path, O_RDONLY);
+	free(path);
+	if (*fd < 0)
+		return -errno;
+
+	return 0;
+}
+
+static int get_property(const char *prop_path, const char *prop_name,
+			char **prop_val, size_t *prop_len)
+{
+	int rc, fd;
+
+	rc = open_prop_file(prop_path, prop_name, &fd);
+	if (rc)
+		return rc;
+
+	rc = read_entire_file(fd, prop_val, prop_len);
+	close(fd);
+
+	return rc;
+}
+
+int rtas_token(const char *call_name)
+{
+	char *prop_buf = NULL;
+	size_t len;
+	int rc;
+
+	rc = get_property(ofdt_rtas_path, call_name, &prop_buf, &len);
+	if (rc < 0) {
+		rc = RTAS_UNKNOWN_OP;
+		goto err;
+	}
+
+	rc = be32_to_cpu(*(int *)prop_buf);
+
+err:
+	free(prop_buf);
+	return rc;
+}
+
+static int read_kregion_bounds(struct region *kregion)
+{
+	char *buf;
+	int fd;
+	int rc;
+
+	fd = open("/proc/ppc64/rtas/rmo_buffer", O_RDONLY);
+	if (fd < 0) {
+		printf("Could not open rmo_buffer file\n");
+		return RTAS_IO_ASSERT;
+	}
+
+	rc = read_entire_file(fd, &buf, NULL);
+	close(fd);
+	if (rc) {
+		free(buf);
+		return rc;
+	}
+
+	sscanf(buf, "%" SCNx64 " %x", &kregion->addr, &kregion->size);
+	free(buf);
+
+	if (!(kregion->size && kregion->addr) ||
+	    (kregion->size > (PAGE_SIZE * MAX_PAGES))) {
+		printf("Unexpected kregion bounds\n");
+		return RTAS_IO_ASSERT;
+	}
+
+	return 0;
+}
+
+static int rtas_call(const char *name, int nargs,
+		     int nrets, ...)
+{
+	struct rtas_args args;
+	__be32 *rets[16];
+	int i, rc, token;
+	va_list ap;
+
+	va_start(ap, nrets);
+
+	token = rtas_token(name);
+	if (token == RTAS_UNKNOWN_OP) {
+		// We don't care if the call doesn't exist
+		printf("call '%s' not available, skipping...", name);
+		rc = RTAS_UNKNOWN_OP;
+		goto err;
+	}
+
+	args.token = cpu_to_be32(token);
+	args.nargs = cpu_to_be32(nargs);
+	args.nret = cpu_to_be32(nrets);
+
+	for (i = 0; i < nargs; i++)
+		args.args[i] = (__be32) va_arg(ap, unsigned long);
+
+	for (i = 0; i < nrets; i++)
+		rets[i] = (__be32 *) va_arg(ap, unsigned long);
+
+	rc = syscall(__NR_rtas, &args);
+	if (rc) {
+		rc = -errno;
+		goto err;
+	}
+
+	if (nrets) {
+		*(rets[0]) = be32_to_cpu(args.args[nargs]);
+
+		for (i = 1; i < nrets; i++) {
+			*(rets[i]) = args.args[nargs + i];
+		}
+	}
+
+err:
+	va_end(ap);
+	return rc;