/*
 * 32-bit compatibility support for ELF format executables and core dumps.
 *
 * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License v.2.
 *
 * Red Hat Author: Roland McGrath.
 *
 * This file is used in a 64-bit kernel that wants to support 32-bit ELF.
 * asm/elf.h is responsible for defining the compat_* and COMPAT_* macros
 * used below, with definitions appropriate for 32-bit ABI compatibility.
 *
 * We use macros to rename the ABI types and machine-dependent
 * functions used in binfmt_elf.c to compat versions.
 */

#include <linux/elfcore-compat.h>
#include <linux/time.h>

/*
 * Rename the basic ELF layout types to refer to the 32-bit class of files.
 */
#undef	ELF_CLASS
#define ELF_CLASS	ELFCLASS32

#undef	elfhdr
#undef	elf_phdr
#undef	elf_shdr
#undef	elf_note
#undef	elf_addr_t
#define elfhdr		elf32_hdr
#define elf_phdr	elf32_phdr
#define elf_shdr	elf32_shdr
#define elf_note	elf32_note
#define elf_addr_t	Elf32_Addr

/*
 * Some data types as stored in coredump.
 */
#define user_long_t		compat_long_t
#define user_siginfo_t		compat_siginfo_t
#define copy_siginfo_to_user	copy_siginfo_to_user32

/*
 * The machine-dependent core note format types are defined in elfcore-compat.h,
 * which requires asm/elf.h to define compat_elf_gregset_t et al.
 */
#define elf_prstatus	compat_elf_prstatus
#define elf_prpsinfo	compat_elf_prpsinfo

/*
 * Compat version of cputime_to_compat_timeval, perhaps this
 * should be an inline in <linux/compat.h>.
 */
static void cputime_to_compat_timeval(const cputime_t cputime,
				      struct compat_timeval *value)
{
	struct timeval tv;
	cputime_to_timeval(cputime, &tv);
	value->tv_sec = tv.tv_sec;
	value->tv_usec = tv.tv_usec;
}

#undef cputime_to_timeval
#define cputime_to_timeval cputime_to_compat_timeval


/*
 * To use this file, asm/elf.h must define compat_elf_check_arch.
 * The other following macros can be defined if the compat versions
 * differ from the native ones, or omitted when they match.
 */

#undef	ELF_ARCH
#undef	elf_check_arch
#define	elf_check_arch	compat_elf_check_arch

#ifdef	COMPAT_ELF_PLATFORM
#undef	ELF_PLATFORM
#define	ELF_PLATFORM		COMPAT_ELF_PLATFORM
#endif

#ifdef	COMPAT_ELF_HWCAP
#undef	ELF_HWCAP
#define	ELF_HWCAP		COMPAT_ELF_HWCAP
#endif

#ifdef	COMPAT_ELF_HWCAP2
#undef	ELF_HWCAP2
#define	ELF_HWCAP2		COMPAT_ELF_HWCAP2
#endif

#ifdef	COMPAT_ARCH_DLINFO
#undef	ARCH_DLINFO
#define	ARCH_DLINFO		COMPAT_ARCH_DLINFO
#endif

#ifdef	COMPAT_ELF_ET_DYN_BASE
#undef	ELF_ET_DYN_BASE
#define	ELF_ET_DYN_BASE		COMPAT_ELF_ET_DYN_BASE
#endif

#ifdef COMPAT_ELF_EXEC_PAGESIZE
#undef	ELF_EXEC_PAGESIZE
#define	ELF_EXEC_PAGESIZE	COMPAT_ELF_EXEC_PAGESIZE
#endif

#ifdef	COMPAT_ELF_PLAT_INIT
#undef	ELF_PLAT_INIT
#define	ELF_PLAT_INIT		COMPAT_ELF_PLAT_INIT
#endif

#ifdef	COMPAT_SET_PERSONALITY
#undef	SET_PERSONALITY
#define	SET_PERSONALITY		COMPAT_SET_PERSONALITY
#endif

#ifdef	compat_start_thread
#undef	start_thread
#define	start_thread		compat_start_thread
#endif

#ifdef	compat_arch_setup_additional_pages
#undef	ARCH_HAS_SETUP_ADDITIONAL_PAGES
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
#undef	arch_setup_additional_pages
#define	arch_setup_additional_pages compat_arch_setup_additional_pages
#endif

/*
 * Rename a few of the symbols that binfmt_elf.c will define.
 * These are all local so the names don't really matter, but it
 * might make some debugging less confusing not to duplicate them.
 */
#define elf_format		compat_elf_format
#define init_elf_binfmt		init_compat_elf_binfmt
#define exit_elf_binfmt		exit_compat_elf_binfmt

/*
 * We share all the actual code with the native (64-bit) version.
 */
#include "binfmt_elf.c"
l'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Dexuan Cui &lt;decui@microsoft.com&gt;</td><td class='right'>2017-01-28 11:46:02 -0700</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-31 10:59:48 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/perf-archive.sh?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>433e19cf33d34bb6751c874a9c00980552fe508c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/perf-archive.sh?id=433e19cf33d34bb6751c874a9c00980552fe508c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>ce6547ef2987fbb289fa28f03536328a42781651</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/perf-archive.sh?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>tools/perf/perf-archive.sh</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/perf-archive.sh?h=nds-private-remove&amp;id=191e885a2e130e639bb0c8ee350d7047294f2ce6'>191e885a2e130e639bb0c8ee350d7047294f2ce6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/perf-archive.sh?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c&amp;id2=191e885a2e130e639bb0c8ee350d7047294f2ce6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()</div><div class='commit-msg'>Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")
added the proper mb(), but removed the test "prev_write_sz &lt; pending_sz"
when making the signal decision.

As a result, the guest can signal the host unnecessarily,
and then the host can throttle the guest because the host
thinks the guest is buggy or malicious; finally the user
running stress test can perceive intermittent freeze of
the guest.

This patch brings back the test, and properly handles the
in-place consumption APIs used by NetVSC (see get_next_pkt_raw(),
put_pkt_raw() and commit_rd_index()).

Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")

Signed-off-by: Dexuan Cui &lt;decui@microsoft.com&gt;
Reported-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Tested-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Cc: "K. Y. Srinivasan" &lt;kys@microsoft.com&gt;
Cc: Haiyang Zhang &lt;haiyangz@microsoft.com&gt;
Cc: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>Diffstat</a> (limited to 'tools/perf/perf-archive.sh')</div><table summary='diffstat' class='diffstat'>