Merge tag 'powerpc-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Add support for (optionally) using queued spinlocks & rwlocks.

 - Support for a new faster system call ABI using the scv instruction on
   Power9 or later.

 - Drop support for the PROT_SAO mmap/mprotect flag as it will be
   unsupported on Power10 and future processors, leaving us with no way
   to implement the functionality it requests. This risks breaking
   userspace, though we believe it is unused in practice.

 - A bug fix for, and then the removal of, our custom stack expansion
   checking. We now allow stack expansion up to the rlimit, like other
   architectures.

 - Remove the remnants of our (previously disabled) topology update
   code, which tried to react to NUMA layout changes on virtualised
   systems, but was prone to crashes and other problems.

 - Add PMU support for Power10 CPUs.

 - A change to our signal trampoline so that we don't unbalance the link
   stack (branch return predictor) in the signal delivery path.

 - Lots of other cleanups, refactorings, smaller features and so on as
   usual.

Thanks to: Abhishek Goel, Alastair D'Silva, Alexander A. Klimov, Alexey
Kardashevskiy, Alistair Popple, Andrew Donnellan, Aneesh Kumar K.V, Anju
T Sudhakar, Anton Blanchard, Arnd Bergmann, Athira Rajeev, Balamuruhan
S, Bharata B Rao, Bill Wendling, Bin Meng, Cédric Le Goater, Chris
Packham, Christophe Leroy, Christoph Hellwig, Daniel Axtens, Dan
Williams, David Lamparter, Desnes A. Nunes do Rosario, Erhard F., Finn
Thain, Frederic Barrat, Ganesh Goudar, Gautham R. Shenoy, Geoff Levand,
Greg Kurz, Gustavo A. R. Silva, Hari Bathini, Harish, Imre Kaloz, Joel
Stanley, Joe Perches, John Crispin, Jordan Niethe, Kajol Jain, Kamalesh
Babulal, Kees Cook, Laurent Dufour, Leonardo Bras, Li RongQing, Madhavan
Srinivasan, Mahesh Salgaonkar, Mark Cave-Ayland, Michal Suchanek, Milton
Miller, Mimi Zohar, Murilo Opsfelder Araujo, Nathan Chancellor, Nathan
Lynch, Naveen N. Rao, Nayna Jain, Nicholas Piggin, Oliver O'Halloran,
Palmer Dabbelt, Pedro Miraglia Franco de Carvalho, Philippe Bergheaud,
Pingfan Liu, Pratik Rajesh Sampat, Qian Cai, Qinglang Miao, Randy
Dunlap, Ravi Bangoria, Sachin Sant, Sam Bobroff, Sandipan Das, Santosh
Sivaraj, Satheesh Rajendran, Shirisha Ganta, Sourabh Jain, Srikar
Dronamraju, Stan Johnson, Stephen Rothwell, Thadeu Lima de Souza
Cascardo, Thiago Jung Bauermann, Tom Lane, Vaibhav Jain, Vladis Dronov,
Wei Yongjun, Wen Xiong, YueHaibing.

* tag 'powerpc-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (337 commits)
  selftests/powerpc: Fix pkey syscall redefinitions
  powerpc: Fix circular dependency between percpu.h and mmu.h
  powerpc/powernv/sriov: Fix use of uninitialised variable
  selftests/powerpc: Skip vmx/vsx/tar/etc tests on older CPUs
  powerpc/40x: Fix assembler warning about r0
  powerpc/papr_scm: Add support for fetching nvdimm 'fuel-gauge' metric
  powerpc/papr_scm: Fetch nvdimm performance stats from PHYP
  cpuidle: pseries: Fixup exit latency for CEDE(0)
  cpuidle: pseries: Add function to parse extended CEDE records
  cpuidle: pseries: Set the latency-hint before entering CEDE
  selftests/powerpc: Fix online CPU selection
  powerpc/perf: Consolidate perf_callchain_user_[64|32]()
  powerpc/pseries/hotplug-cpu: Remove double free in error path
  powerpc/pseries/mobility: Add pr_debug() for device tree changes
  powerpc/pseries/mobility: Set pr_fmt()
  powerpc/cacheinfo: Warn if cache object chain becomes unordered
  powerpc/cacheinfo: Improve diagnostics about malformed cache lists
  powerpc/cacheinfo: Use name@unit instead of full DT path in debug messages
  powerpc/cacheinfo: Set pr_fmt()
  powerpc: fix function annotations to avoid section mismatch warnings with gcc-10
  ...

1 files changed, 129 insertions, 21 deletions

diff --git a/tools/testing/selftests/powerpc/alignment/alignment_handler.c b/tools/testing/selftests/powerpc/alignment/alignment_handler.c
index 0453c50c949c..55ef15184057 100644
--- a/tools/testing/selftests/powerpc/alignment/alignment_handler.c
+++ b/tools/testing/selftests/powerpc/alignment/alignment_handler.c
@@ -9,7 +9,17 @@
  * This selftest exercises the powerpc alignment fault handler.
  *
  * We create two sets of source and destination buffers, one in regular memory,
- * the other cache-inhibited (we use /dev/fb0 for this).
+ * the other cache-inhibited (by default we use /dev/fb0 for this, but an
+ * alterative path for cache-inhibited memory may be provided).
+ *
+ * One way to get cache-inhibited memory is to use the "mem" kernel parameter
+ * to limit the kernel to less memory than actually exists.  Addresses above
+ * the limit may still be accessed but will be treated as cache-inhibited. For
+ * example, if there is actually 4GB of memory and the parameter "mem=3GB" is
+ * used, memory from address 0xC0000000 onwards is treated as cache-inhibited.
+ * To access this region /dev/mem is used. The kernel should be configured
+ * without CONFIG_STRICT_DEVMEM. In this case use:
+ *         ./alignment_handler /dev/mem 0xc0000000
  *
  * We initialise the source buffers, then use whichever set of load/store
  * instructions is under test to copy bytes from the source buffers to the
@@ -48,11 +58,14 @@
 #include <asm/cputable.h>
 
 #include "utils.h"
+#include "instructions.h"
 
 int bufsize;
 int debug;
 int testing;
 volatile int gotsig;
+char *cipath = "/dev/fb0";
+long cioffset;
 
 void sighandler(int sig, siginfo_t *info, void *ctx)
 {
@@ -84,6 +97,17 @@ void sighandler(int sig, siginfo_t *info, void *ctx)
 	}							\
 	rc |= do_test(#name, test_##name)
 
+#define TESTP(name, ld_op, st_op, ld_reg, st_reg)		\
+	void test_##name(char *s, char *d)			\
+	{							\
+		asm volatile(					\
+			ld_op(ld_reg, %0, 0, 0)			\
+			st_op(st_reg, %1, 0, 0)			\
+			:: "r"(s), "r"(d), "r"(0)		\
+			: "memory", "vs0", "vs32", "r31");	\
+	}							\
+	rc |= do_test(#name, test_##name)
+
 #define LOAD_VSX_XFORM_TEST(op) TEST(op, op, stxvd2x, XFORM, 32, 32)
 #define STORE_VSX_XFORM_TEST(op) TEST(op, lxvd2x, op, XFORM, 32, 32)
 #define LOAD_VSX_DFORM_TEST(op) TEST(op, op, stxv, DFORM, 32, 32)
@@ -103,6 +127,17 @@ void sighandler(int sig, siginfo_t *info, void *ctx)
 #define LOAD_FLOAT_XFORM_TEST(op)  TEST(op, op, stfdx, XFORM, 0, 0)
 #define STORE_FLOAT_XFORM_TEST(op) TEST(op, lfdx, op, XFORM, 0, 0)
 
+#define LOAD_MLS_PREFIX_TEST(op) TESTP(op, op, PSTD, 31, 31)
+#define STORE_MLS_PREFIX_TEST(op) TESTP(op, PLD, op, 31, 31)
+
+#define LOAD_8LS_PREFIX_TEST(op) TESTP(op, op, PSTD, 31, 31)
+#define STORE_8LS_PREFIX_TEST(op) TESTP(op, PLD, op, 31, 31)
+
+#define LOAD_FLOAT_MLS_PREFIX_TEST(op) TESTP(op, op, PSTFD, 0, 0)
+#define STORE_FLOAT_MLS_PREFIX_TEST(op) TESTP(op, PLFD, op, 0, 0)
+
+#define LOAD_VSX_8LS_PREFIX_TEST(op, tail) TESTP(op, op, PSTXV ## tail, 0, 32)
+#define STORE_VSX_8LS_PREFIX_TEST(op, tail) TESTP(op, PLXV ## tail, op, 32, 0)
 
 /* FIXME: Unimplemented tests: */
 // STORE_DFORM_TEST(stq)   /* FIXME: need two registers for quad */
@@ -195,17 +230,18 @@ int do_test(char *test_name, void (*test_func)(char *, char *))
 
 	printf("\tDoing %s:\t", test_name);
 
-	fd = open("/dev/fb0", O_RDWR);
+	fd = open(cipath, O_RDWR);
 	if (fd < 0) {
 		printf("\n");
-		perror("Can't open /dev/fb0 now?");
+		perror("Can't open ci file now?");
 		return 1;
 	}
 
-	ci0 = mmap(NULL, bufsize, PROT_WRITE, MAP_SHARED,
-		   fd, 0x0);
-	ci1 = mmap(NULL, bufsize, PROT_WRITE, MAP_SHARED,
-		   fd, bufsize);
+	ci0 = mmap(NULL, bufsize, PROT_WRITE | PROT_READ, MAP_SHARED,
+		   fd, cioffset);
+	ci1 = mmap(NULL, bufsize, PROT_WRITE | PROT_READ, MAP_SHARED,
+		   fd, cioffset + bufsize);
+
 	if ((ci0 == MAP_FAILED) || (ci1 == MAP_FAILED)) {
 		printf("\n");
 		perror("mmap failed");
@@ -270,11 +306,11 @@ int do_test(char *test_name, void (*test_func)(char *, char *))
 	return rc;
 }
 
-static bool can_open_fb0(void)
+static bool can_open_cifile(void)
 {
 	int fd;
 
-	fd = open("/dev/fb0", O_RDWR);
+	fd = open(cipath, O_RDWR);
 	if (fd < 0)
 		return false;
 
@@ -286,7 +322,7 @@ int test_alignment_handler_vsx_206(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
 
 	printf("VSX: 2.06B\n");
@@ -304,7 +340,7 @@ int test_alignment_handler_vsx_207(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07));
 
 	printf("VSX: 2.07B\n");
@@ -320,7 +356,7 @@ int test_alignment_handler_vsx_300(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 
 	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_00));
 	printf("VSX: 3.00B\n");
@@ -348,11 +384,30 @@ int test_alignment_handler_vsx_300(void)
 	return rc;
 }
 
+int test_alignment_handler_vsx_prefix(void)
+{
+	int rc = 0;
+
+	SKIP_IF(!can_open_cifile());
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
+
+	printf("VSX: PREFIX\n");
+	LOAD_VSX_8LS_PREFIX_TEST(PLXSD, 0);
+	LOAD_VSX_8LS_PREFIX_TEST(PLXSSP, 0);
+	LOAD_VSX_8LS_PREFIX_TEST(PLXV0, 0);
+	LOAD_VSX_8LS_PREFIX_TEST(PLXV1, 1);
+	STORE_VSX_8LS_PREFIX_TEST(PSTXSD, 0);
+	STORE_VSX_8LS_PREFIX_TEST(PSTXSSP, 0);
+	STORE_VSX_8LS_PREFIX_TEST(PSTXV0, 0);
+	STORE_VSX_8LS_PREFIX_TEST(PSTXV1, 1);
+	return rc;
+}
+
 int test_alignment_handler_integer(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 
 	printf("Integer\n");
 	LOAD_DFORM_TEST(lbz);
@@ -408,7 +463,7 @@ int test_alignment_handler_integer_206(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
 
 	printf("Integer: 2.06\n");
@@ -419,11 +474,32 @@ int test_alignment_handler_integer_206(void)
 	return rc;
 }
 
+int test_alignment_handler_integer_prefix(void)
+{
+	int rc = 0;
+
+	SKIP_IF(!can_open_cifile());
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
+
+	printf("Integer: PREFIX\n");
+	LOAD_MLS_PREFIX_TEST(PLBZ);
+	LOAD_MLS_PREFIX_TEST(PLHZ);
+	LOAD_MLS_PREFIX_TEST(PLHA);
+	LOAD_MLS_PREFIX_TEST(PLWZ);
+	LOAD_8LS_PREFIX_TEST(PLWA);
+	LOAD_8LS_PREFIX_TEST(PLD);
+	STORE_MLS_PREFIX_TEST(PSTB);
+	STORE_MLS_PREFIX_TEST(PSTH);
+	STORE_MLS_PREFIX_TEST(PSTW);
+	STORE_8LS_PREFIX_TEST(PSTD);
+	return rc;
+}
+
 int test_alignment_handler_vmx(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 	SKIP_IF(!have_hwcap(PPC_FEATURE_HAS_ALTIVEC));
 
 	printf("VMX\n");
@@ -451,7 +527,7 @@ int test_alignment_handler_fp(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 
 	printf("Floating point\n");
 	LOAD_FLOAT_DFORM_TEST(lfd);
@@ -479,7 +555,7 @@ int test_alignment_handler_fp_205(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_05));
 
 	printf("Floating point: 2.05\n");
@@ -497,7 +573,7 @@ int test_alignment_handler_fp_206(void)
 {
 	int rc = 0;
 
-	SKIP_IF(!can_open_fb0());
+	SKIP_IF(!can_open_cifile());
 	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
 
 	printf("Floating point: 2.06\n");
@@ -507,13 +583,32 @@ int test_alignment_handler_fp_206(void)
 	return rc;
 }
 
+
+int test_alignment_handler_fp_prefix(void)
+{
+	int rc = 0;
+
+	SKIP_IF(!can_open_cifile());
+	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
+
+	printf("Floating point: PREFIX\n");
+	LOAD_FLOAT_DFORM_TEST(lfs);
+	LOAD_FLOAT_MLS_PREFIX_TEST(PLFS);
+	LOAD_FLOAT_MLS_PREFIX_TEST(PLFD);
+	STORE_FLOAT_MLS_PREFIX_TEST(PSTFS);
+	STORE_FLOAT_MLS_PREFIX_TEST(PSTFD);
+	return rc;
+}
+
 void usage(char *prog)
 {
-	printf("Usage: %s [options]\n", prog);
+	printf("Usage: %s [options] [path [offset]]\n", prog);
 	printf("  -d	Enable debug error output\n");
 	printf("\n");
-	printf("This test requires a POWER8 or POWER9 CPU and a usable ");
-	printf("framebuffer at /dev/fb0.\n");
+	printf("This test requires a POWER8, POWER9 or POWER10 CPU ");
+	printf("and either a usable framebuffer at /dev/fb0 or ");
+	printf("the path to usable cache inhibited memory and optional ");
+	printf("offset to be provided\n");
 }
 
 int main(int argc, char *argv[])
@@ -533,6 +628,13 @@ int main(int argc, char *argv[])
 			exit(1);
 		}
 	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc > 0)
+		cipath = argv[0];
+	if (argc > 1)
+		cioffset = strtol(argv[1], 0, 0x10);
 
 	bufsize = getpagesize();
 
@@ -552,10 +654,14 @@ int main(int argc, char *argv[])
 			   "test_alignment_handler_vsx_207");
 	rc |= test_harness(test_alignment_handler_vsx_300,
 			   "test_alignment_handler_vsx_300");
+	rc |= test_harness(test_alignment_handler_vsx_prefix,
+			   "test_alignment_handler_vsx_prefix");
 	rc |= test_harness(test_alignment_handler_integer,
 			   "test_alignment_handler_integer");
 	rc |= test_harness(test_alignment_handler_integer_206,
 			   "test_alignment_handler_integer_206");
+	rc |= test_harness(test_alignment_handler_integer_prefix,
+			   "test_alignment_handler_integer_prefix");
 	rc |= test_harness(test_alignment_handler_vmx,
 			   "test_alignment_handler_vmx");
 	rc |= test_harness(test_alignment_handler_fp,
@@ -564,5 +670,7 @@ int main(int argc, char *argv[])
 			   "test_alignment_handler_fp_205");
 	rc |= test_harness(test_alignment_handler_fp_206,
 			   "test_alignment_handler_fp_206");
+	rc |= test_harness(test_alignment_handler_fp_prefix,
+			   "test_alignment_handler_fp_prefix");
 	return rc;
 }