/* * Copyright 2015, Michael Neuling, IBM Corp. * Licensed under GPLv2. * Original: Michael Neuling 19/7/2013 * Edited: Rashmica Gupta 01/12/2015 * * Do some transactions, see if the tar is corrupted. * If the transaction is aborted, the TAR should be rolled back to the * checkpointed value before the transaction began. The value written to * TAR in suspended mode should only remain in TAR if the transaction * completes. */ #include #include #include #include #include "tm.h" #include "utils.h" int num_loops = 10000; int test_tar(void) { int i; SKIP_IF(!have_htm()); for (i = 0; i < num_loops; i++) { uint64_t result = 0; asm __volatile__( "li 7, 1;" "mtspr %[tar], 7;" /* tar = 1 */ "tbegin.;" "beq 3f;" "li 4, 0x7000;" /* Loop lots, to use time */ "2:;" /* Start loop */ "li 7, 2;" "mtspr %[tar], 7;" /* tar = 2 */ "tsuspend.;" "li 7, 3;" "mtspr %[tar], 7;" /* tar = 3 */ "tresume.;" "subi 4, 4, 1;" "cmpdi 4, 0;" "bne 2b;" "tend.;" /* Transaction sucess! TAR should be 3 */ "mfspr 7, %[tar];" "ori %[res], 7, 4;" // res = 3|4 = 7 "b 4f;" /* Abort handler. TAR should be rolled back to 1 */ "3:;" "mfspr 7, %[tar];" "ori %[res], 7, 8;" // res = 1|8 = 9 "4:;" : [res]"=r"(result) : [tar]"i"(SPRN_TAR) : "memory", "r0", "r4", "r7"); /* If result is anything else other than 7 or 9, the tar * value must have been corrupted. */ if ((result != 7) && (result != 9)) return 1; } return 0; } int main(int argc, char *argv[]) { /* A low number of iterations (eg 100) can cause a false pass */ if (argc > 1) { if (strcmp(argv[1], "-h") == 0) { printf("Syntax:\n\t%s []\n", argv[0]); return 1; } else { num_loops = atoi(argv[1]); } } printf("Starting, %d loops\n", num_loops); return test_harness(test_tar, "tm_tar"); } >treecommit diff

path: root/include/xen/xen-ops.h

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