| Message ID | 1587062312-4939-1-git-send-email-rishabhb@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/3] remoteproc: Make coredump functionality configurable | expand |
Hi Rishabh, On Thu, Apr 16, 2020 at 11:38:30AM -0700, Rishabh Bhatnagar wrote: > Add a new file implementing coredump specific functionality. > This would enable clients to have the option to implement custom > dump functionality. The default coredump functionality remains same > as rproc_coredump function. Next time please add a cover letter that mentions the baseline your work applies on and version your patches. > > Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org> > --- > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/remoteproc_core.c | 83 ----------------------- > drivers/remoteproc/remoteproc_coredump.c | 111 +++++++++++++++++++++++++++++++ > drivers/remoteproc/remoteproc_internal.h | 10 +++ > 4 files changed, 122 insertions(+), 83 deletions(-) > create mode 100644 drivers/remoteproc/remoteproc_coredump.c > > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > index e30a1b1..f1d1264 100644 > --- a/drivers/remoteproc/Makefile > +++ b/drivers/remoteproc/Makefile > @@ -9,6 +9,7 @@ remoteproc-y += remoteproc_debugfs.o > remoteproc-y += remoteproc_sysfs.o > remoteproc-y += remoteproc_virtio.o > remoteproc-y += remoteproc_elf_loader.o > +remoteproc-y += remoteproc_coredump.o > obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o > obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o > obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > index 097f33e..c0e9e5d 100644 > --- a/drivers/remoteproc/remoteproc_core.c > +++ b/drivers/remoteproc/remoteproc_core.c > @@ -1555,89 +1555,6 @@ int rproc_coredump_add_custom_segment(struct rproc *rproc, > EXPORT_SYMBOL(rproc_coredump_add_custom_segment); > > /** > - * rproc_coredump() - perform coredump > - * @rproc: rproc handle > - * > - * This function will generate an ELF header for the registered segments > - * and create a devcoredump device associated with rproc. > - */ > -static void rproc_coredump(struct rproc *rproc) > -{ > - struct rproc_dump_segment *segment; > - struct elf32_phdr *phdr; > - struct elf32_hdr *ehdr; > - size_t data_size; > - size_t offset; > - void *data; > - void *ptr; > - int phnum = 0; > - > - if (list_empty(&rproc->dump_segments)) > - return; > - > - data_size = sizeof(*ehdr); > - list_for_each_entry(segment, &rproc->dump_segments, node) { > - data_size += sizeof(*phdr) + segment->size; > - > - phnum++; > - } > - > - data = vmalloc(data_size); > - if (!data) > - return; > - > - ehdr = data; > - > - memset(ehdr, 0, sizeof(*ehdr)); > - memcpy(ehdr->e_ident, ELFMAG, SELFMAG); > - ehdr->e_ident[EI_CLASS] = ELFCLASS32; > - ehdr->e_ident[EI_DATA] = ELFDATA2LSB; > - ehdr->e_ident[EI_VERSION] = EV_CURRENT; > - ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; > - ehdr->e_type = ET_CORE; > - ehdr->e_machine = EM_NONE; > - ehdr->e_version = EV_CURRENT; > - ehdr->e_entry = rproc->bootaddr; > - ehdr->e_phoff = sizeof(*ehdr); > - ehdr->e_ehsize = sizeof(*ehdr); > - ehdr->e_phentsize = sizeof(*phdr); > - ehdr->e_phnum = phnum; > - > - phdr = data + ehdr->e_phoff; > - offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; > - list_for_each_entry(segment, &rproc->dump_segments, node) { > - memset(phdr, 0, sizeof(*phdr)); > - phdr->p_type = PT_LOAD; > - phdr->p_offset = offset; > - phdr->p_vaddr = segment->da; > - phdr->p_paddr = segment->da; > - phdr->p_filesz = segment->size; > - phdr->p_memsz = segment->size; > - phdr->p_flags = PF_R | PF_W | PF_X; > - phdr->p_align = 0; > - > - if (segment->dump) { > - segment->dump(rproc, segment, data + offset); > - } else { > - ptr = rproc_da_to_va(rproc, segment->da, segment->size); > - if (!ptr) { > - dev_err(&rproc->dev, > - "invalid coredump segment (%pad, %zu)\n", > - &segment->da, segment->size); > - memset(data + offset, 0xff, segment->size); > - } else { > - memcpy(data + offset, ptr, segment->size); > - } > - } > - > - offset += phdr->p_filesz; > - phdr++; > - } > - > - dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); > -} > - > -/** > * rproc_trigger_recovery() - recover a remoteproc > * @rproc: the remote processor > * > diff --git a/drivers/remoteproc/remoteproc_coredump.c b/drivers/remoteproc/remoteproc_coredump.c > new file mode 100644 > index 0000000..9de0467 > --- /dev/null > +++ b/drivers/remoteproc/remoteproc_coredump.c > @@ -0,0 +1,111 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Coredump functionality for Remoteproc framework. > + * > + * Copyright (c) 2020, The Linux Foundation. All rights reserved. > + */ > + > +#include <linux/devcoredump.h> > +#include <linux/device.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/remoteproc.h> > +#include "remoteproc_internal.h" > + > +static void create_elf_header(void *data, int phnum, struct rproc *rproc) > +{ > + struct elf32_phdr *phdr; > + struct elf32_hdr *ehdr; > + struct rproc_dump_segment *segment; > + int offset; > + > + ehdr = data; > + > + memset(ehdr, 0, sizeof(*ehdr)); > + memcpy(ehdr->e_ident, ELFMAG, SELFMAG); > + ehdr->e_ident[EI_CLASS] = ELFCLASS32; > + ehdr->e_ident[EI_DATA] = ELFDATA2LSB; > + ehdr->e_ident[EI_VERSION] = EV_CURRENT; > + ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; > + ehdr->e_type = ET_CORE; > + ehdr->e_machine = EM_NONE; > + ehdr->e_version = EV_CURRENT; > + ehdr->e_entry = rproc->bootaddr; > + ehdr->e_phoff = sizeof(*ehdr); > + ehdr->e_ehsize = sizeof(*ehdr); > + ehdr->e_phentsize = sizeof(*phdr); > + ehdr->e_phnum = phnum; > + > + phdr = data + ehdr->e_phoff; > + offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; > + list_for_each_entry(segment, &rproc->dump_segments, node) { > + memset(phdr, 0, sizeof(*phdr)); > + phdr->p_type = PT_LOAD; > + phdr->p_offset = offset; > + phdr->p_vaddr = segment->da; > + phdr->p_paddr = segment->da; > + phdr->p_filesz = segment->size; > + phdr->p_memsz = segment->size; > + phdr->p_flags = PF_R | PF_W | PF_X; > + phdr->p_align = 0; > + > + offset += phdr->p_filesz; > + phdr++; > + } > +} > + > +/** > + * rproc_default_coredump() - perform coredump > + * @rproc: rproc handle > + * > + * This function will generate an ELF header for the registered segments > + * and create a devcoredump device associated with rproc. > + */ > +void rproc_default_coredump(struct rproc *rproc) > +{ > + struct rproc_dump_segment *segment; > + struct elf32_phdr *phdr; > + struct elf32_hdr *ehdr; > + size_t data_size; > + void *data, *ptr; > + int offset, phnum = 0; > + > + if (list_empty(&rproc->dump_segments)) > + return; > + > + data_size = sizeof(*ehdr); > + list_for_each_entry(segment, &rproc->dump_segments, node) { > + data_size += sizeof(*phdr) + segment->size; > + > + phnum++; > + } > + > + data = vmalloc(data_size); > + if (!data) > + return; > + > + ehdr = data; > + create_elf_header(data, phnum, rproc); Please leave function rproc_default_coredump() the same way it originally was for this patch. Modifications can be done in later patches. > + > + phdr = data + ehdr->e_phoff; > + offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; > + list_for_each_entry(segment, &rproc->dump_segments, node) { > + if (segment->dump) { > + segment->dump(rproc, segment, data + offset); > + } else { > + ptr = rproc_da_to_va(rproc, segment->da, segment->size); > + if (!ptr) { > + dev_err(&rproc->dev, > + "invalid coredump segment (%pad, %zu)\n", > + &segment->da, segment->size); > + memset(data + offset, 0xff, segment->size); > + } else { > + memcpy(data + offset, ptr, segment->size); > + } > + } > + phdr++; Here @offset is not updated and as such will trample the previous value with each iteration. To be honest I would rather keep the initialisation of @phdr in this loop, that way it is done only once. Thanks, Mathieu > + } > + > + dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); > +} > +EXPORT_SYMBOL(rproc_default_coredump); > diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h > index 493ef92..28b6af2 100644 > --- a/drivers/remoteproc/remoteproc_internal.h > +++ b/drivers/remoteproc/remoteproc_internal.h > @@ -47,6 +47,9 @@ struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc, > int rproc_init_sysfs(void); > void rproc_exit_sysfs(void); > > +/* from remoteproc_coredump.c */ > +void rproc_default_coredump(struct rproc *rproc); > + > void rproc_free_vring(struct rproc_vring *rvring); > int rproc_alloc_vring(struct rproc_vdev *rvdev, int i); > > @@ -119,4 +122,11 @@ struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc, > return NULL; > } > > +static inline > +void rproc_coredump(struct rproc *rproc) > +{ > + return rproc_default_coredump(rproc); > + > +} > + > #endif /* REMOTEPROC_INTERNAL_H */ > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project
On Thu 16 Apr 11:38 PDT 2020, Rishabh Bhatnagar wrote: $subject says that this patch makes coredump configurable, but this patch simply moves the rproc_coredump() to its own file. I think this is the right thing to do and should be done as verbatim as possible (i.e. just make sure it still works). I do think you should include the remaining functions for adding segments etc, so that we capture all of "coredump" in this new file. > Add a new file implementing coredump specific functionality. > This would enable clients to have the option to implement custom > dump functionality. The default coredump functionality remains same > as rproc_coredump function. So please update $subject and reword this message to describe the fact that you're just moving code out of the core, for the purpose of upcoming enhancements. > > Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org> > --- > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/remoteproc_core.c | 83 ----------------------- > drivers/remoteproc/remoteproc_coredump.c | 111 +++++++++++++++++++++++++++++++ > drivers/remoteproc/remoteproc_internal.h | 10 +++ > 4 files changed, 122 insertions(+), 83 deletions(-) > create mode 100644 drivers/remoteproc/remoteproc_coredump.c > > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > index e30a1b1..f1d1264 100644 > --- a/drivers/remoteproc/Makefile > +++ b/drivers/remoteproc/Makefile > @@ -9,6 +9,7 @@ remoteproc-y += remoteproc_debugfs.o > remoteproc-y += remoteproc_sysfs.o > remoteproc-y += remoteproc_virtio.o > remoteproc-y += remoteproc_elf_loader.o > +remoteproc-y += remoteproc_coredump.o If you move this up right below remoteproc_core.o you're maintaining the almost alphabetical order of these. > obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o > obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o > obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > index 097f33e..c0e9e5d 100644 > --- a/drivers/remoteproc/remoteproc_core.c > +++ b/drivers/remoteproc/remoteproc_core.c > @@ -1555,89 +1555,6 @@ int rproc_coredump_add_custom_segment(struct rproc *rproc, > EXPORT_SYMBOL(rproc_coredump_add_custom_segment); > > /** > - * rproc_coredump() - perform coredump > - * @rproc: rproc handle > - * > - * This function will generate an ELF header for the registered segments > - * and create a devcoredump device associated with rproc. > - */ > -static void rproc_coredump(struct rproc *rproc) > -{ > - struct rproc_dump_segment *segment; > - struct elf32_phdr *phdr; > - struct elf32_hdr *ehdr; > - size_t data_size; > - size_t offset; > - void *data; > - void *ptr; > - int phnum = 0; > - > - if (list_empty(&rproc->dump_segments)) > - return; > - > - data_size = sizeof(*ehdr); > - list_for_each_entry(segment, &rproc->dump_segments, node) { > - data_size += sizeof(*phdr) + segment->size; > - > - phnum++; > - } > - > - data = vmalloc(data_size); > - if (!data) > - return; > - > - ehdr = data; > - > - memset(ehdr, 0, sizeof(*ehdr)); > - memcpy(ehdr->e_ident, ELFMAG, SELFMAG); > - ehdr->e_ident[EI_CLASS] = ELFCLASS32; > - ehdr->e_ident[EI_DATA] = ELFDATA2LSB; > - ehdr->e_ident[EI_VERSION] = EV_CURRENT; > - ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; > - ehdr->e_type = ET_CORE; > - ehdr->e_machine = EM_NONE; > - ehdr->e_version = EV_CURRENT; > - ehdr->e_entry = rproc->bootaddr; > - ehdr->e_phoff = sizeof(*ehdr); > - ehdr->e_ehsize = sizeof(*ehdr); > - ehdr->e_phentsize = sizeof(*phdr); > - ehdr->e_phnum = phnum; > - > - phdr = data + ehdr->e_phoff; > - offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; > - list_for_each_entry(segment, &rproc->dump_segments, node) { > - memset(phdr, 0, sizeof(*phdr)); > - phdr->p_type = PT_LOAD; > - phdr->p_offset = offset; > - phdr->p_vaddr = segment->da; > - phdr->p_paddr = segment->da; > - phdr->p_filesz = segment->size; > - phdr->p_memsz = segment->size; > - phdr->p_flags = PF_R | PF_W | PF_X; > - phdr->p_align = 0; > - > - if (segment->dump) { > - segment->dump(rproc, segment, data + offset); > - } else { > - ptr = rproc_da_to_va(rproc, segment->da, segment->size); > - if (!ptr) { > - dev_err(&rproc->dev, > - "invalid coredump segment (%pad, %zu)\n", > - &segment->da, segment->size); > - memset(data + offset, 0xff, segment->size); > - } else { > - memcpy(data + offset, ptr, segment->size); > - } > - } > - > - offset += phdr->p_filesz; > - phdr++; > - } > - > - dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); > -} > - > -/** > * rproc_trigger_recovery() - recover a remoteproc > * @rproc: the remote processor > * > diff --git a/drivers/remoteproc/remoteproc_coredump.c b/drivers/remoteproc/remoteproc_coredump.c > new file mode 100644 > index 0000000..9de0467 > --- /dev/null > +++ b/drivers/remoteproc/remoteproc_coredump.c > @@ -0,0 +1,111 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Coredump functionality for Remoteproc framework. > + * > + * Copyright (c) 2020, The Linux Foundation. All rights reserved. > + */ > + > +#include <linux/devcoredump.h> You should be able to remove this from remoteproc_core.c. > +#include <linux/device.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/remoteproc.h> > +#include "remoteproc_internal.h" > + > +static void create_elf_header(void *data, int phnum, struct rproc *rproc) As Mathieu pointed out, please move the code (as) verbatim (as possible) in this commit and then follow up with enhancements in subsequent commits. > +{ > + struct elf32_phdr *phdr; > + struct elf32_hdr *ehdr; > + struct rproc_dump_segment *segment; > + int offset; > + > + ehdr = data; > + > + memset(ehdr, 0, sizeof(*ehdr)); > + memcpy(ehdr->e_ident, ELFMAG, SELFMAG); > + ehdr->e_ident[EI_CLASS] = ELFCLASS32; > + ehdr->e_ident[EI_DATA] = ELFDATA2LSB; > + ehdr->e_ident[EI_VERSION] = EV_CURRENT; > + ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; > + ehdr->e_type = ET_CORE; > + ehdr->e_machine = EM_NONE; > + ehdr->e_version = EV_CURRENT; > + ehdr->e_entry = rproc->bootaddr; > + ehdr->e_phoff = sizeof(*ehdr); > + ehdr->e_ehsize = sizeof(*ehdr); > + ehdr->e_phentsize = sizeof(*phdr); > + ehdr->e_phnum = phnum; > + > + phdr = data + ehdr->e_phoff; > + offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; > + list_for_each_entry(segment, &rproc->dump_segments, node) { > + memset(phdr, 0, sizeof(*phdr)); > + phdr->p_type = PT_LOAD; > + phdr->p_offset = offset; > + phdr->p_vaddr = segment->da; > + phdr->p_paddr = segment->da; > + phdr->p_filesz = segment->size; > + phdr->p_memsz = segment->size; > + phdr->p_flags = PF_R | PF_W | PF_X; > + phdr->p_align = 0; > + > + offset += phdr->p_filesz; > + phdr++; > + } > +} > + > +/** > + * rproc_default_coredump() - perform coredump > + * @rproc: rproc handle > + * > + * This function will generate an ELF header for the registered segments > + * and create a devcoredump device associated with rproc. > + */ > +void rproc_default_coredump(struct rproc *rproc) > +{ > + struct rproc_dump_segment *segment; > + struct elf32_phdr *phdr; > + struct elf32_hdr *ehdr; > + size_t data_size; > + void *data, *ptr; > + int offset, phnum = 0; > + > + if (list_empty(&rproc->dump_segments)) > + return; > + > + data_size = sizeof(*ehdr); > + list_for_each_entry(segment, &rproc->dump_segments, node) { > + data_size += sizeof(*phdr) + segment->size; > + > + phnum++; > + } > + > + data = vmalloc(data_size); > + if (!data) > + return; > + > + ehdr = data; > + create_elf_header(data, phnum, rproc); > + > + phdr = data + ehdr->e_phoff; > + offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; > + list_for_each_entry(segment, &rproc->dump_segments, node) { > + if (segment->dump) { > + segment->dump(rproc, segment, data + offset); > + } else { > + ptr = rproc_da_to_va(rproc, segment->da, segment->size); > + if (!ptr) { > + dev_err(&rproc->dev, > + "invalid coredump segment (%pad, %zu)\n", > + &segment->da, segment->size); > + memset(data + offset, 0xff, segment->size); > + } else { > + memcpy(data + offset, ptr, segment->size); > + } > + } > + phdr++; > + } > + > + dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); > +} > +EXPORT_SYMBOL(rproc_default_coredump); As Mathieu pointed out, there's no need to EXPORT_SYMBOL within remoteproc.ko > diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h > index 493ef92..28b6af2 100644 > --- a/drivers/remoteproc/remoteproc_internal.h > +++ b/drivers/remoteproc/remoteproc_internal.h > @@ -47,6 +47,9 @@ struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc, > int rproc_init_sysfs(void); > void rproc_exit_sysfs(void); > > +/* from remoteproc_coredump.c */ > +void rproc_default_coredump(struct rproc *rproc); > + > void rproc_free_vring(struct rproc_vring *rvring); > int rproc_alloc_vring(struct rproc_vdev *rvdev, int i); > > @@ -119,4 +122,11 @@ struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc, > return NULL; > } > > +static inline > +void rproc_coredump(struct rproc *rproc) We keep these inline functions to make the following of a ops function pointer nicer looking, but this is just a function call. So please drop this and let the core just call straight into the remoteproc_coredump.c. Regards, Bjorn > +{ > + return rproc_default_coredump(rproc); > + > +} > + > #endif /* REMOTEPROC_INTERNAL_H */ > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index e30a1b1..f1d1264 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -9,6 +9,7 @@ remoteproc-y += remoteproc_debugfs.o remoteproc-y += remoteproc_sysfs.o remoteproc-y += remoteproc_virtio.o remoteproc-y += remoteproc_elf_loader.o +remoteproc-y += remoteproc_coredump.o obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 097f33e..c0e9e5d 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1555,89 +1555,6 @@ int rproc_coredump_add_custom_segment(struct rproc *rproc, EXPORT_SYMBOL(rproc_coredump_add_custom_segment); /** - * rproc_coredump() - perform coredump - * @rproc: rproc handle - * - * This function will generate an ELF header for the registered segments - * and create a devcoredump device associated with rproc. - */ -static void rproc_coredump(struct rproc *rproc) -{ - struct rproc_dump_segment *segment; - struct elf32_phdr *phdr; - struct elf32_hdr *ehdr; - size_t data_size; - size_t offset; - void *data; - void *ptr; - int phnum = 0; - - if (list_empty(&rproc->dump_segments)) - return; - - data_size = sizeof(*ehdr); - list_for_each_entry(segment, &rproc->dump_segments, node) { - data_size += sizeof(*phdr) + segment->size; - - phnum++; - } - - data = vmalloc(data_size); - if (!data) - return; - - ehdr = data; - - memset(ehdr, 0, sizeof(*ehdr)); - memcpy(ehdr->e_ident, ELFMAG, SELFMAG); - ehdr->e_ident[EI_CLASS] = ELFCLASS32; - ehdr->e_ident[EI_DATA] = ELFDATA2LSB; - ehdr->e_ident[EI_VERSION] = EV_CURRENT; - ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; - ehdr->e_type = ET_CORE; - ehdr->e_machine = EM_NONE; - ehdr->e_version = EV_CURRENT; - ehdr->e_entry = rproc->bootaddr; - ehdr->e_phoff = sizeof(*ehdr); - ehdr->e_ehsize = sizeof(*ehdr); - ehdr->e_phentsize = sizeof(*phdr); - ehdr->e_phnum = phnum; - - phdr = data + ehdr->e_phoff; - offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; - list_for_each_entry(segment, &rproc->dump_segments, node) { - memset(phdr, 0, sizeof(*phdr)); - phdr->p_type = PT_LOAD; - phdr->p_offset = offset; - phdr->p_vaddr = segment->da; - phdr->p_paddr = segment->da; - phdr->p_filesz = segment->size; - phdr->p_memsz = segment->size; - phdr->p_flags = PF_R | PF_W | PF_X; - phdr->p_align = 0; - - if (segment->dump) { - segment->dump(rproc, segment, data + offset); - } else { - ptr = rproc_da_to_va(rproc, segment->da, segment->size); - if (!ptr) { - dev_err(&rproc->dev, - "invalid coredump segment (%pad, %zu)\n", - &segment->da, segment->size); - memset(data + offset, 0xff, segment->size); - } else { - memcpy(data + offset, ptr, segment->size); - } - } - - offset += phdr->p_filesz; - phdr++; - } - - dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); -} - -/** * rproc_trigger_recovery() - recover a remoteproc * @rproc: the remote processor * diff --git a/drivers/remoteproc/remoteproc_coredump.c b/drivers/remoteproc/remoteproc_coredump.c new file mode 100644 index 0000000..9de0467 --- /dev/null +++ b/drivers/remoteproc/remoteproc_coredump.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Coredump functionality for Remoteproc framework. + * + * Copyright (c) 2020, The Linux Foundation. All rights reserved. + */ + +#include <linux/devcoredump.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/remoteproc.h> +#include "remoteproc_internal.h" + +static void create_elf_header(void *data, int phnum, struct rproc *rproc) +{ + struct elf32_phdr *phdr; + struct elf32_hdr *ehdr; + struct rproc_dump_segment *segment; + int offset; + + ehdr = data; + + memset(ehdr, 0, sizeof(*ehdr)); + memcpy(ehdr->e_ident, ELFMAG, SELFMAG); + ehdr->e_ident[EI_CLASS] = ELFCLASS32; + ehdr->e_ident[EI_DATA] = ELFDATA2LSB; + ehdr->e_ident[EI_VERSION] = EV_CURRENT; + ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; + ehdr->e_type = ET_CORE; + ehdr->e_machine = EM_NONE; + ehdr->e_version = EV_CURRENT; + ehdr->e_entry = rproc->bootaddr; + ehdr->e_phoff = sizeof(*ehdr); + ehdr->e_ehsize = sizeof(*ehdr); + ehdr->e_phentsize = sizeof(*phdr); + ehdr->e_phnum = phnum; + + phdr = data + ehdr->e_phoff; + offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; + list_for_each_entry(segment, &rproc->dump_segments, node) { + memset(phdr, 0, sizeof(*phdr)); + phdr->p_type = PT_LOAD; + phdr->p_offset = offset; + phdr->p_vaddr = segment->da; + phdr->p_paddr = segment->da; + phdr->p_filesz = segment->size; + phdr->p_memsz = segment->size; + phdr->p_flags = PF_R | PF_W | PF_X; + phdr->p_align = 0; + + offset += phdr->p_filesz; + phdr++; + } +} + +/** + * rproc_default_coredump() - perform coredump + * @rproc: rproc handle + * + * This function will generate an ELF header for the registered segments + * and create a devcoredump device associated with rproc. + */ +void rproc_default_coredump(struct rproc *rproc) +{ + struct rproc_dump_segment *segment; + struct elf32_phdr *phdr; + struct elf32_hdr *ehdr; + size_t data_size; + void *data, *ptr; + int offset, phnum = 0; + + if (list_empty(&rproc->dump_segments)) + return; + + data_size = sizeof(*ehdr); + list_for_each_entry(segment, &rproc->dump_segments, node) { + data_size += sizeof(*phdr) + segment->size; + + phnum++; + } + + data = vmalloc(data_size); + if (!data) + return; + + ehdr = data; + create_elf_header(data, phnum, rproc); + + phdr = data + ehdr->e_phoff; + offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; + list_for_each_entry(segment, &rproc->dump_segments, node) { + if (segment->dump) { + segment->dump(rproc, segment, data + offset); + } else { + ptr = rproc_da_to_va(rproc, segment->da, segment->size); + if (!ptr) { + dev_err(&rproc->dev, + "invalid coredump segment (%pad, %zu)\n", + &segment->da, segment->size); + memset(data + offset, 0xff, segment->size); + } else { + memcpy(data + offset, ptr, segment->size); + } + } + phdr++; + } + + dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); +} +EXPORT_SYMBOL(rproc_default_coredump); diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h index 493ef92..28b6af2 100644 --- a/drivers/remoteproc/remoteproc_internal.h +++ b/drivers/remoteproc/remoteproc_internal.h @@ -47,6 +47,9 @@ struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc, int rproc_init_sysfs(void); void rproc_exit_sysfs(void); +/* from remoteproc_coredump.c */ +void rproc_default_coredump(struct rproc *rproc); + void rproc_free_vring(struct rproc_vring *rvring); int rproc_alloc_vring(struct rproc_vdev *rvdev, int i); @@ -119,4 +122,11 @@ struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc, return NULL; } +static inline +void rproc_coredump(struct rproc *rproc) +{ + return rproc_default_coredump(rproc); + +} + #endif /* REMOTEPROC_INTERNAL_H */
Add a new file implementing coredump specific functionality. This would enable clients to have the option to implement custom dump functionality. The default coredump functionality remains same as rproc_coredump function. Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org> --- drivers/remoteproc/Makefile | 1 + drivers/remoteproc/remoteproc_core.c | 83 ----------------------- drivers/remoteproc/remoteproc_coredump.c | 111 +++++++++++++++++++++++++++++++ drivers/remoteproc/remoteproc_internal.h | 10 +++ 4 files changed, 122 insertions(+), 83 deletions(-) create mode 100644 drivers/remoteproc/remoteproc_coredump.c