/****************************************************************************** ******************************************************************************* ** ** Copyright (C) 2005-2008 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. ** ******************************************************************************* ******************************************************************************/ #include "dlm_internal.h" #include "rcom.h" #include "util.h" #define DLM_ERRNO_EDEADLK 35 #define DLM_ERRNO_EBADR 53 #define DLM_ERRNO_EBADSLT 57 #define DLM_ERRNO_EPROTO 71 #define DLM_ERRNO_EOPNOTSUPP 95 #define DLM_ERRNO_ETIMEDOUT 110 #define DLM_ERRNO_EINPROGRESS 115 static void header_out(struct dlm_header *hd) { hd->h_version = cpu_to_le32(hd->h_version); hd->h_lockspace = cpu_to_le32(hd->h_lockspace); hd->h_nodeid = cpu_to_le32(hd->h_nodeid); hd->h_length = cpu_to_le16(hd->h_length); } static void header_in(struct dlm_header *hd) { hd->h_version = le32_to_cpu(hd->h_version); hd->h_lockspace = le32_to_cpu(hd->h_lockspace); hd->h_nodeid = le32_to_cpu(hd->h_nodeid); hd->h_length = le16_to_cpu(hd->h_length); } /* higher errno values are inconsistent across architectures, so select one set of values for on the wire */ static int to_dlm_errno(int err) { switch (err) { case -EDEADLK: return -DLM_ERRNO_EDEADLK; case -EBADR: return -DLM_ERRNO_EBADR; case -EBADSLT: return -DLM_ERRNO_EBADSLT; case -EPROTO: return -DLM_ERRNO_EPROTO; case -EOPNOTSUPP: return -DLM_ERRNO_EOPNOTSUPP; case -ETIMEDOUT: return -DLM_ERRNO_ETIMEDOUT; case -EINPROGRESS: return -DLM_ERRNO_EINPROGRESS; } return err; } static int from_dlm_errno(int err) { switch (err) { case -DLM_ERRNO_EDEADLK: return -EDEADLK; case -DLM_ERRNO_EBADR: return -EBADR; case -DLM_ERRNO_EBADSLT: return -EBADSLT; case -DLM_ERRNO_EPROTO: return -EPROTO; case -DLM_ERRNO_EOPNOTSUPP: return -EOPNOTSUPP; case -DLM_ERRNO_ETIMEDOUT: return -ETIMEDOUT; case -DLM_ERRNO_EINPROGRESS: return -EINPROGRESS; } return err; } void dlm_message_out(struct dlm_message *ms) { header_out(&ms->m_header); ms->m_type = cpu_to_le32(ms->m_type); ms->m_nodeid = cpu_to_le32(ms->m_nodeid); ms->m_pid = cpu_to_le32(ms->m_pid); ms->m_lkid = cpu_to_le32(ms->m_lkid); ms->m_remid = cpu_to_le32(ms->m_remid); ms->m_parent_lkid = cpu_to_le32(ms->m_parent_lkid); ms->m_parent_remid = cpu_to_le32(ms->m_parent_remid); ms->m_exflags = cpu_to_le32(ms->m_exflags); ms->m_sbflags = cpu_to_le32(ms->m_sbflags); ms->m_flags = cpu_to_le32(ms->m_flags); ms->m_lvbseq = cpu_to_le32(ms->m_lvbseq); ms->m_hash = cpu_to_le32(ms->m_hash); ms->m_status = cpu_to_le32(ms->m_status); ms->m_grmode = cpu_to_le32(ms->m_grmode); ms->m_rqmode = cpu_to_le32(ms->m_rqmode); ms->m_bastmode = cpu_to_le32(ms->m_bastmode); ms->m_asts = cpu_to_le32(ms->m_asts); ms->m_result = cpu_to_le32(to_dlm_errno(ms->m_result)); } void dlm_message_in(struct dlm_message *ms) { header_in(&ms->m_header); ms->m_type = le32_to_cpu(ms->m_type); ms->m_nodeid = le32_to_cpu(ms->m_nodeid); ms->m_pid = le32_to_cpu(ms->m_pid); ms->m_lkid = le32_to_cpu(ms->m_lkid); ms->m_remid = le32_to_cpu(ms->m_remid); ms->m_parent_lkid = le32_to_cpu(ms->m_parent_lkid); ms->m_parent_remid = le32_to_cpu(ms->m_parent_remid); ms->m_exflags = le32_to_cpu(ms->m_exflags); ms->m_sbflags = le32_to_cpu(ms->m_sbflags); ms->m_flags = le32_to_cpu(ms->m_flags); ms->m_lvbseq = le32_to_cpu(ms->m_lvbseq); ms->m_hash = le32_to_cpu(ms->m_hash); ms->m_status = le32_to_cpu(ms->m_status); ms->m_grmode = le32_to_cpu(ms->m_grmode); ms->m_rqmode = le32_to_cpu(ms->m_rqmode); ms->m_bastmode = le32_to_cpu(ms->m_bastmode); ms->m_asts = le32_to_cpu(ms->m_asts); ms->m_result = from_dlm_errno(le32_to_cpu(ms->m_result)); } void dlm_rcom_out(struct dlm_rcom *rc) { header_out(&rc->rc_header); rc->rc_type = cpu_to_le32(rc->rc_type); rc->rc_result = cpu_to_le32(rc->rc_result); rc->rc_id = cpu_to_le64(rc->rc_id); rc->rc_seq = cpu_to_le64(rc->rc_seq); rc->rc_seq_reply = cpu_to_le64(rc->rc_seq_reply); } void dlm_rcom_in(struct dlm_rcom *rc) { header_in(&rc->rc_header); rc->rc_type = le32_to_cpu(rc->rc_type); rc->rc_result = le32_to_cpu(rc->rc_result); rc->rc_id = le64_to_cpu(rc->rc_id); rc->rc_seq = le64_to_cpu(rc->rc_seq); rc->rc_seq_reply = le64_to_cpu(rc->rc_seq_reply); } selected'>unified
authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /drivers/usb/gadget/function/uvc.h
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
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 <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> 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 <mingo@kernel.org>
Diffstat (limited to 'drivers/usb/gadget/function/uvc.h')