192f0f8e9d
Pull powerpc updates from Michael Ellerman:
"Notable changes:
- Removal of the NPU DMA code, used by the out-of-tree Nvidia driver,
as well as some other functions only used by drivers that haven't
(yet?) made it upstream.
- A fix for a bug in our handling of hardware watchpoints (eg. perf
record -e mem: ...) which could lead to register corruption and
kernel crashes.
- Enable HAVE_ARCH_HUGE_VMAP, which allows us to use large pages for
vmalloc when using the Radix MMU.
- A large but incremental rewrite of our exception handling code to
use gas macros rather than multiple levels of nested CPP macros.
And the usual small fixes, cleanups and improvements.
Thanks to: Alastair D'Silva, Alexey Kardashevskiy, Andreas Schwab,
Aneesh Kumar K.V, Anju T Sudhakar, Anton Blanchard, Arnd Bergmann,
Athira Rajeev, Cédric Le Goater, Christian Lamparter, Christophe
Leroy, Christophe Lombard, Christoph Hellwig, Daniel Axtens, Denis
Efremov, Enrico Weigelt, Frederic Barrat, Gautham R. Shenoy, Geert
Uytterhoeven, Geliang Tang, Gen Zhang, Greg Kroah-Hartman, Greg Kurz,
Gustavo Romero, Krzysztof Kozlowski, Madhavan Srinivasan, Masahiro
Yamada, Mathieu Malaterre, Michael Neuling, Nathan Lynch, Naveen N.
Rao, Nicholas Piggin, Nishad Kamdar, Oliver O'Halloran, Qian Cai, Ravi
Bangoria, Sachin Sant, Sam Bobroff, Satheesh Rajendran, Segher
Boessenkool, Shaokun Zhang, Shawn Anastasio, Stewart Smith, Suraj
Jitindar Singh, Thiago Jung Bauermann, YueHaibing"
* tag 'powerpc-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (163 commits)
powerpc/powernv/idle: Fix restore of SPRN_LDBAR for POWER9 stop state.
powerpc/eeh: Handle hugepages in ioremap space
ocxl: Update for AFU descriptor template version 1.1
powerpc/boot: pass CONFIG options in a simpler and more robust way
powerpc/boot: add {get, put}_unaligned_be32 to xz_config.h
powerpc/irq: Don't WARN continuously in arch_local_irq_restore()
powerpc/module64: Use symbolic instructions names.
powerpc/module32: Use symbolic instructions names.
powerpc: Move PPC_HA() PPC_HI() and PPC_LO() to ppc-opcode.h
powerpc/module64: Fix comment in R_PPC64_ENTRY handling
powerpc/boot: Add lzo support for uImage
powerpc/boot: Add lzma support for uImage
powerpc/boot: don't force gzipped uImage
powerpc/8xx: Add microcode patch to move SMC parameter RAM.
powerpc/8xx: Use IO accessors in microcode programming.
powerpc/8xx: replace #ifdefs by IS_ENABLED() in microcode.c
powerpc/8xx: refactor programming of microcode CPM params.
powerpc/8xx: refactor printing of microcode patch name.
powerpc/8xx: Refactor microcode write
powerpc/8xx: refactor writing of CPM microcode arrays
...
105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2015, Michael Neuling, IBM Corp.
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*
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* Original: Michael Neuling 4/12/2013
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* Edited: Rashmica Gupta 4/12/2015
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*
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* See if the altivec state is leaked out of an aborted transaction due to
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* kernel vmx copy loops.
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*
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* When the transaction aborts, VSR values should rollback to the values
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* they held before the transaction commenced. Using VSRs while transaction
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* is suspended should not affect the checkpointed values.
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*
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* (1) write A to a VSR
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* (2) start transaction
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* (3) suspend transaction
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* (4) change the VSR to B
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* (5) trigger kernel vmx copy loop
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* (6) abort transaction
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* (7) check that the VSR value is A
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*/
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <assert.h>
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#include "tm.h"
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#include "utils.h"
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int test_vmxcopy()
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{
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long double vecin = 1.3;
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long double vecout;
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unsigned long pgsize = getpagesize();
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int i;
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int fd;
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int size = pgsize*16;
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char tmpfile[] = "/tmp/page_faultXXXXXX";
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char buf[pgsize];
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char *a;
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uint64_t aborted = 0;
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SKIP_IF(!have_htm());
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SKIP_IF(!is_ppc64le());
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fd = mkstemp(tmpfile);
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assert(fd >= 0);
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memset(buf, 0, pgsize);
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for (i = 0; i < size; i += pgsize)
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assert(write(fd, buf, pgsize) == pgsize);
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unlink(tmpfile);
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a = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
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assert(a != MAP_FAILED);
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asm __volatile__(
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"lxvd2x 40,0,%[vecinptr];" /* set 40 to initial value*/
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"tbegin.;"
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"beq 3f;"
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"tsuspend.;"
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"xxlxor 40,40,40;" /* set 40 to 0 */
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"std 5, 0(%[map]);" /* cause kernel vmx copy page */
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"tabort. 0;"
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"tresume.;"
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"tend.;"
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"li %[res], 0;"
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"b 5f;"
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/* Abort handler */
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"3:;"
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"li %[res], 1;"
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"5:;"
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"stxvd2x 40,0,%[vecoutptr];"
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: [res]"=&r"(aborted)
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: [vecinptr]"r"(&vecin),
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[vecoutptr]"r"(&vecout),
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[map]"r"(a)
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: "memory", "r0", "r3", "r4", "r5", "r6", "r7");
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if (aborted && (vecin != vecout)){
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printf("FAILED: vector state leaked on abort %f != %f\n",
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(double)vecin, (double)vecout);
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return 1;
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}
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munmap(a, size);
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close(fd);
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return 0;
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}
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int main(void)
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{
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return test_harness(test_vmxcopy, "tm_vmxcopy");
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}
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