/* Test context switching to see if the DSCR SPR is correctly preserved * when within a transaction. * * Note: We assume that the DSCR has been left at the default value (0) * for all CPUs. * * Method: * * Set a value into the DSCR. * * Start a transaction, and suspend it (*). * * Hard loop checking to see if the transaction has become doomed. * * Now that we *may* have been preempted, record the DSCR and TEXASR SPRS. * * If the abort was because of a context switch, check the DSCR value. * Otherwise, try again. * * (*) If the transaction is not suspended we can't see the problem because * the transaction abort handler will restore the DSCR to it's checkpointed * value before we regain control. */ #include #include #include #include #include #include "utils.h" #include "tm.h" #define SPRN_DSCR 0x03 int test_body(void) { uint64_t rv, dscr1 = 1, dscr2, texasr; SKIP_IF(!have_htm()); printf("Check DSCR TM context switch: "); fflush(stdout); for (;;) { rv = 1; asm __volatile__ ( /* set a known value into the DSCR */ "ld 3, %[dscr1];" "mtspr %[sprn_dscr], 3;" /* start and suspend a transaction */ "tbegin.;" "beq 1f;" "tsuspend.;" /* hard loop until the transaction becomes doomed */ "2: ;" "tcheck 0;" "bc 4, 0, 2b;" /* record DSCR and TEXASR */ "mfspr 3, %[sprn_dscr];" "std 3, %[dscr2];" "mfspr 3, %[sprn_texasr];" "std 3, %[texasr];" "tresume.;" "tend.;" "li %[rv], 0;" "1: ;" : [rv]"=r"(rv), [dscr2]"=m"(dscr2), [texasr]"=m"(texasr) : [dscr1]"m"(dscr1) , [sprn_dscr]"i"(SPRN_DSCR), [sprn_texasr]"i"(SPRN_TEXASR) : "memory", "r3" ); assert(rv); /* make sure the transaction aborted */ if ((texasr >> 56) != TM_CAUSE_RESCHED) { putchar('.'); fflush(stdout); continue; } if (dscr2 != dscr1) { printf(" FAIL\n"); return 1; } else { printf(" OK\n"); return 0; } } } int main(void) { return test_harness(test_body, "tm_resched_dscr"); } ux/net-next.git/diff/drivers/usb/renesas_usbhs/mod_host.c?id=d6040764adcb5cb6de1489422411d701c158bb69'>diff
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authorSalvatore Benedetto <salvatore.benedetto@intel.com>2017-01-13 11:54:08 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2017-01-23 22:41:32 +0800
commitd6040764adcb5cb6de1489422411d701c158bb69 (patch)
treeec8f34788bcdeaa9dc8f69c58af4c005d1e49021 /drivers/usb/renesas_usbhs/mod_host.c
parent07825f0acd85dd8b7481d5ef0eb024b05364d892 (diff)
crypto: api - Clear CRYPTO_ALG_DEAD bit before registering an alg
Make sure CRYPTO_ALG_DEAD bit is cleared before proceeding with the algorithm registration. This fixes qat-dh registration when driver is restarted Cc: <stable@vger.kernel.org> Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/usb/renesas_usbhs/mod_host.c')