#ifndef TARGET_CORE_PR_H
#define TARGET_CORE_PR_H

#include <linux/types.h>
#include <target/target_core_base.h>

/*
 * PERSISTENT_RESERVE_OUT service action codes
 *
 * spc4r17 section 6.14.2 Table 171
 */
#define PRO_REGISTER				0x00
#define PRO_RESERVE				0x01
#define PRO_RELEASE				0x02
#define PRO_CLEAR				0x03
#define PRO_PREEMPT				0x04
#define PRO_PREEMPT_AND_ABORT			0x05
#define PRO_REGISTER_AND_IGNORE_EXISTING_KEY	0x06
#define PRO_REGISTER_AND_MOVE			0x07
/*
 * PERSISTENT_RESERVE_IN service action codes
 *
 * spc4r17 section 6.13.1 Table 159
 */
#define PRI_READ_KEYS				0x00
#define PRI_READ_RESERVATION			0x01
#define PRI_REPORT_CAPABILITIES			0x02
#define PRI_READ_FULL_STATUS			0x03
/*
 * PERSISTENT_RESERVE_ SCOPE field
 *
 * spc4r17 section 6.13.3.3 Table 163
 */
#define PR_SCOPE_LU_SCOPE			0x00
/*
 * PERSISTENT_RESERVE_* TYPE field
 *
 * spc4r17 section 6.13.3.4 Table 164
 */
#define PR_TYPE_WRITE_EXCLUSIVE			0x01
#define PR_TYPE_EXCLUSIVE_ACCESS		0x03
#define PR_TYPE_WRITE_EXCLUSIVE_REGONLY		0x05
#define PR_TYPE_EXCLUSIVE_ACCESS_REGONLY	0x06
#define PR_TYPE_WRITE_EXCLUSIVE_ALLREG		0x07
#define PR_TYPE_EXCLUSIVE_ACCESS_ALLREG		0x08

#define PR_APTPL_MAX_IPORT_LEN			256
#define PR_APTPL_MAX_TPORT_LEN			256

/*
 *  Function defined in target_core_spc.c
 */
void spc_parse_naa_6h_vendor_specific(struct se_device *, unsigned char *);

extern struct kmem_cache *t10_pr_reg_cache;

extern void core_pr_dump_initiator_port(struct t10_pr_registration *,
			char *, u32);
extern sense_reason_t target_scsi2_reservation_release(struct se_cmd *);
extern sense_reason_t target_scsi2_reservation_reserve(struct se_cmd *);
extern int core_scsi3_alloc_aptpl_registration(
			struct t10_reservation *, u64,
			unsigned char *, unsigned char *, u64,
			unsigned char *, u16, u64, int, int, u8);
extern int core_scsi3_check_aptpl_registration(struct se_device *,
			struct se_portal_group *, struct se_lun *,
			struct se_node_acl *, u64);
extern void core_scsi3_free_pr_reg_from_nacl(struct se_device *,
					     struct se_node_acl *);
extern void core_scsi3_free_all_registrations(struct se_device *);
extern unsigned char *core_scsi3_pr_dump_type(int);

extern sense_reason_t target_scsi3_emulate_pr_in(struct se_cmd *);
extern sense_reason_t target_scsi3_emulate_pr_out(struct se_cmd *);
extern sense_reason_t target_check_reservation(struct se_cmd *);

#endif /* TARGET_CORE_PR_H */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/batman-adv?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>batman-adv</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/batman-adv/bat_v.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>bat_v.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c8f325a59cfc718d13a50fbc746ed9b415c25e92'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><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>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/net/batman-adv/bat_v.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/batman-adv/bat_v.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>d53fbdac9d0781e39a13b2ac6b2bd258cf3b4140</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/batman-adv/bat_v.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>net/batman-adv/bat_v.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/batman-adv/bat_v.c?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>bf29bddf0417a4783da3b24e8c9e017ac649326f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/batman-adv/bat_v.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92&amp;id2=bf29bddf0417a4783da3b24e8c9e017ac649326f'>diff</a>)</td></tr></table>
<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/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Diffstat</a> (limited to 'net/batman-adv/bat_v.c')</div><table summary='diffstat' class='diffstat'>