Re: [PATCH v5 3/8] remoteproc: Use u64 type for boot_addr

Clément Leger
2020-03-10T07:59:14Z

----- On 9 Mar, 2020, at 20:52, Mathieu Poirier mathieu.poirier@linaro.org wrote:

> On Mon, Mar 02, 2020 at 10:38:57AM +0100, Clement Leger wrote:
>> elf64 entry is defined as a u64. Since boot_addr is used to store the
>> elf entry point, change boot_addr type to u64 to support both elf32
>> and elf64. In the same time, fix users that were using this variable.
>>
>> Signed-off-by: Clement Leger <cleger@kalray.eu>
>> ---
>> drivers/remoteproc/remoteproc_elf_loader.c | 2 +-
>> drivers/remoteproc/remoteproc_internal.h | 2 +-
>> drivers/remoteproc/st_remoteproc.c | 2 +-
>> include/linux/remoteproc.h | 4 ++--
>> 4 files changed, 5 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/remoteproc/remoteproc_elf_loader.c
>> b/drivers/remoteproc/remoteproc_elf_loader.c
>> index 606aae166eba..c2a9783cfb9a 100644
>> --- a/drivers/remoteproc/remoteproc_elf_loader.c
>> +++ b/drivers/remoteproc/remoteproc_elf_loader.c
>> @@ -102,7 +102,7 @@ EXPORT_SYMBOL(rproc_elf_sanity_check);
>> * Note that the boot address is not a configurable property of all remote
>> * processors. Some will always boot at a specific hard-coded address.
>> */
>> -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
>> +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
>> {
>> struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data;
>>
>> diff --git a/drivers/remoteproc/remoteproc_internal.h
>> b/drivers/remoteproc/remoteproc_internal.h
>> index 58580210575c..0deae5f237b8 100644
>> --- a/drivers/remoteproc/remoteproc_internal.h
>> +++ b/drivers/remoteproc/remoteproc_internal.h
>> @@ -55,7 +55,7 @@ phys_addr_t rproc_va_to_pa(void *cpu_addr);
>> int rproc_trigger_recovery(struct rproc *rproc);
>>
>> int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw);
>> -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw);
>> +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw);
>> int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw);
>> int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw);
>> struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,
>
> The return type of function rproc_get_boot_addr() should also be changed from
> u32 to u64. Or perhaps this is intentional to make sure rproc->bootaddr never
> occupies more than 32bit?

No, this is a mistake clearly. I haven't been able to test with a 64 bit
boot address since our remote processors always boot in the 32 bits
space. But since the elf64 boot address is on 64 bitsn this was a logical
modification. I will fix that.

>
>> diff --git a/drivers/remoteproc/st_remoteproc.c
>> b/drivers/remoteproc/st_remoteproc.c
>> index ee13d23b43a9..a3268d95a50e 100644
>> --- a/drivers/remoteproc/st_remoteproc.c
>> +++ b/drivers/remoteproc/st_remoteproc.c
>> @@ -190,7 +190,7 @@ static int st_rproc_start(struct rproc *rproc)
>> }
>> }
>>
>> - dev_info(&rproc->dev, "Started from 0x%x\n", rproc->bootaddr);
>> + dev_info(&rproc->dev, "Started from 0x%llx\n", rproc->bootaddr);
>>
>> return 0;
>>
>> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
>> index bee559330204..1683d6c386a6 100644
>> --- a/include/linux/remoteproc.h
>> +++ b/include/linux/remoteproc.h
>> @@ -382,7 +382,7 @@ struct rproc_ops {
>> struct rproc *rproc, const struct firmware *fw);
>> int (*load)(struct rproc *rproc, const struct firmware *fw);
>> int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
>> - u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
>> + u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
>> };
>>
>> /**
>> @@ -498,7 +498,7 @@ struct rproc {
>> int num_traces;
>> struct list_head carveouts;
>> struct list_head mappings;
>> - u32 bootaddr;
>> + u64 bootaddr;
>> struct list_head rvdevs;
>> struct list_head subdevs;
>> struct idr notifyids;
>> --
>> 2.15.0.276.g89ea799