/*
 * osd_sec.h - OSD security manager API
 *
 * Copyright (C) 2008 Panasas Inc.  All rights reserved.
 *
 * Authors:
 *   Boaz Harrosh <ooo@electrozaur.com>
 *   Benny Halevy <bhalevy@panasas.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 *
 */
#ifndef __OSD_SEC_H__
#define __OSD_SEC_H__

#include <scsi/osd_protocol.h>
#include <scsi/osd_types.h>

/*
 * Contains types and constants of osd capabilities and security
 * encoding/decoding.
 * API is trying to keep security abstract so initiator of an object
 * based pNFS client knows as little as possible about security and
 * capabilities. It is the Server's osd-initiator place to know more.
 * Also can be used by osd-target.
 */
void osd_sec_encode_caps(void *caps, ...);/* NI */
void osd_sec_init_nosec_doall_caps(void *caps,
	const struct osd_obj_id *obj, bool is_collection, const bool is_v1);

bool osd_is_sec_alldata(struct osd_security_parameters *sec_params);

/* Conditionally sign the CDB according to security setting in ocdb
 * with cap_key */
void osd_sec_sign_cdb(struct osd_cdb *ocdb, const u8 *cap_key);

/* Unconditionally sign the BIO data with cap_key.
 * Check for osd_is_sec_alldata() was done prior to calling this. */
void osd_sec_sign_data(void *data_integ, struct bio *bio, const u8 *cap_key);

/* Version independent copy of caps into the cdb */
void osd_set_caps(struct osd_cdb *cdb, const void *caps);

#endif /* ndef __OSD_SEC_H__ */
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<tr><th>author</th><td>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-02-01 17:45:02 +0000</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-02-01 21:17:49 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/iio?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/iio?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>patch</a>)</td></tr>
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<div class='commit-subject'>efi/fdt: Avoid FDT manipulation after ExitBootServices()</div><div class='commit-msg'>Some AArch64 UEFI implementations disable the MMU in ExitBootServices(),
after which unaligned accesses to RAM are no longer supported.

Commit:

  abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")

fixed an issue in the memory map handling of the stub FDT code, but
inadvertently created an issue with such firmware, by moving some
of the FDT manipulation to after the invocation of ExitBootServices().

Given that the stub's libfdt implementation uses the ordinary, accelerated
string functions, which rely on hardware handling of unaligned accesses,
manipulating the FDT with the MMU off may result in alignment faults.

So fix the situation by moving the update_fdt_memmap() call into the
callback function invoked by efi_exit_boot_services() right before it
calls the ExitBootServices() UEFI service (which is arguably a better
place for it anyway)

Note that disabling the MMU in ExitBootServices() is not compliant with
the UEFI spec, and carries great risk due to the fact that switching from
cached to uncached memory accesses halfway through compiler generated code
(i.e., involving a stack) can never be done in a way that is architecturally
safe.

Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Tested-by: Riku Voipio &lt;riku.voipio@linaro.org&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Cc: mark.rutland@arm.com
Cc: linux-efi@vger.kernel.org
Cc: matt@codeblueprint.co.uk
Cc: leif.lindholm@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Diffstat</a> (limited to 'include/dt-bindings/iio')</div><table summary='diffstat' class='diffstat'>