/*
 * Ptrace test for VMX/VSX registers in the TM context
 *
 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include "ptrace.h"
#include "tm.h"
#include "ptrace-vsx.h"

int shm_id;
unsigned long *cptr, *pptr;

unsigned long fp_load[VEC_MAX];
unsigned long fp_store[VEC_MAX];
unsigned long fp_load_ckpt[VEC_MAX];
unsigned long fp_load_ckpt_new[VEC_MAX];

__attribute__((used)) void load_vsx(void)
{
	loadvsx(fp_load, 0);
}

__attribute__((used)) void load_vsx_ckpt(void)
{
	loadvsx(fp_load_ckpt, 0);
}

void tm_vsx(void)
{
	unsigned long result, texasr;
	int ret;

	cptr = (unsigned long *)shmat(shm_id, NULL, 0);

trans:
	cptr[1] = 0;
	asm __volatile__(
		"bl load_vsx_ckpt;"

		"1: ;"
		"tbegin.;"
		"beq 2f;"

		"bl load_vsx;"
		"tsuspend.;"
		"li 7, 1;"
		"stw 7, 0(%[cptr1]);"
		"tresume.;"
		"b .;"

		"tend.;"
		"li 0, 0;"
		"ori %[res], 0, 0;"
		"b 3f;"

		"2: ;"
		"li 0, 1;"
		"ori %[res], 0, 0;"
		"mfspr %[texasr], %[sprn_texasr];"

		"3: ;"
		: [res] "=r" (result), [texasr] "=r" (texasr)
		: [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),
		[sprn_texasr] "i"  (SPRN_TEXASR), [cptr1] "r" (&cptr[1])
		: "memory", "r0", "r1", "r2", "r3", "r4",
		"r7", "r8", "r9", "r10", "r11"
		);

	if (result) {
		if (!cptr[0])
			goto trans;

		shmdt((void *)cptr);
		storevsx(fp_store, 0);
		ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);
		if (ret)
			exit(1);
		exit(0);
	}
	shmdt((void *)cptr);
	exit(1);
}

int trace_tm_vsx(pid_t child)
{
	unsigned long vsx[VSX_MAX];
	unsigned long vmx[VMX_MAX + 2][2];

	FAIL_IF(start_trace(child));
	FAIL_IF(show_vsx(child, vsx));
	FAIL_IF(validate_vsx(vsx, fp_load));
	FAIL_IF(show_vmx(child, vmx));
	FAIL_IF(validate_vmx(vmx, fp_load));
	FAIL_IF(show_vsx_ckpt(child, vsx));
	FAIL_IF(validate_vsx(vsx, fp_load_ckpt));
	FAIL_IF(show_vmx_ckpt(child, vmx));
	FAIL_IF(validate_vmx(vmx, fp_load_ckpt));
	memset(vsx, 0, sizeof(vsx));
	memset(vmx, 0, sizeof(vmx));

	load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);

	FAIL_IF(write_vsx_ckpt(child, vsx));
	FAIL_IF(write_vmx_ckpt(child, vmx));
	pptr[0] = 1;
	FAIL_IF(stop_trace(child));
	return TEST_PASS;
}

int ptrace_tm_vsx(void)
{
	pid_t pid;
	int ret, status, i;

	SKIP_IF(!have_htm());
	shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);

	for (i = 0; i < 128; i++) {
		fp_load[i] = 1 + rand();
		fp_load_ckpt[i] = 1 + 2 * rand();
		fp_load_ckpt_new[i] = 1 + 3 * rand();
	}

	pid = fork();
	if (pid < 0) {
		perror("fork() failed");
		return TEST_FAIL;
	}

	if (pid == 0)
		tm_vsx();

	if (pid) {
		pptr = (unsigned long *)shmat(shm_id, NULL, 0);
		while (!pptr[1])
			asm volatile("" : : : "memory");

		ret = trace_tm_vsx(pid);
		if (ret) {
			kill(pid, SIGKILL);
			shmdt((void *)pptr);
			shmctl(shm_id, IPC_RMID, NULL);
			return TEST_FAIL;
		}

		shmdt((void *)pptr);
		ret = wait(&status);
		shmctl(shm_id, IPC_RMID, NULL);
		if (ret != pid) {
			printf("Child's exit status not captured\n");
			return TEST_FAIL;
		}

		return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
			TEST_PASS;
	}
	return TEST_PASS;
}

int main(int argc, char *argv[])
{
	return test_harness(ptrace_tm_vsx, "ptrace_tm_vsx");
}
0f3ba6c2e3a43d94d5dcf591'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr class='logheader'><td><span title='2017-02-04 19:58:14 -0500'>2017-02-04</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/netlink.h?id=3b1137fe74829e021f483756a648cbb87c8a1b4a'>net: ipv6: Change notifications for multipath add to RTA_MULTIPATH</a></td><td>David Ahern</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
Change ip6_route_multipath_add to send one notifciation with the full
route encoded with RTA_MULTIPATH instead of a series of individual routes.
This is done by adding a skip_notify flag to the nl_info struct. The
flag is used to skip sending of the notification in the fib code that
actually inserts the route. Once the full route has been added, a
notification is generated with all nexthops.

ip6_route_multipath_add handles 3 use cases: new routes, route replace,
and route append. The multipath notification generated needs to be
consistent with the order of the nexthops and it should be consistent
with the order in a FIB dump which means the route with the first nexthop
needs to be used as the route reference. For the first 2 cases (new and
replace), a reference to the route used to send the notification is
obtained by saving the first route added. For the append case, the last
route added is used to loop back to its first sibling route which is
the first nexthop in the multipath route.

Signed-off-by: David Ahern &lt;dsa@cumulusnetworks.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;


</td></tr>