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authorKees Cook <keescook@chromium.org>2018-10-17 17:20:35 -0700
committerKees Cook <keescook@chromium.org>2018-10-22 07:11:58 -0700
commit1227daa43bce1318ff6fb54e6cd862b4f60245c7 (patch)
tree013a4433679d8626d6a6fab52ae201b0e6571b3f /include/linux
parent95047b0519c17a28e09df5f38750f5354e3db4c4 (diff)
pstore/ram: Clarify resource reservation labels
When ramoops reserved a memory region in the kernel, it had an unhelpful label of "persistent_memory". When reading /proc/iomem, it would be repeated many times, did not hint that it was ramoops in particular, and didn't clarify very much about what each was used for: 400000000-407ffffff : Persistent Memory (legacy) 400000000-400000fff : persistent_memory 400001000-400001fff : persistent_memory ... 4000ff000-4000fffff : persistent_memory Instead, this adds meaningful labels for how the various regions are being used: 400000000-407ffffff : Persistent Memory (legacy) 400000000-400000fff : ramoops:dump(0/252) 400001000-400001fff : ramoops:dump(1/252) ... 4000fc000-4000fcfff : ramoops:dump(252/252) 4000fd000-4000fdfff : ramoops:console 4000fe000-4000fe3ff : ramoops:ftrace(0/3) 4000fe400-4000fe7ff : ramoops:ftrace(1/3) 4000fe800-4000febff : ramoops:ftrace(2/3) 4000fec00-4000fefff : ramoops:ftrace(3/3) 4000ff000-4000fffff : ramoops:pmsg Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Tested-by: Guenter Roeck <groeck@chromium.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/pstore_ram.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h
index e6d226464838..602d64725222 100644
--- a/include/linux/pstore_ram.h
+++ b/include/linux/pstore_ram.h
@@ -46,6 +46,7 @@ struct persistent_ram_zone {
phys_addr_t paddr;
size_t size;
void *vaddr;
+ char *label;
struct persistent_ram_buffer *buffer;
size_t buffer_size;
u32 flags;
@@ -65,7 +66,7 @@ struct persistent_ram_zone {
struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
u32 sig, struct persistent_ram_ecc_info *ecc_info,
- unsigned int memtype, u32 flags);
+ unsigned int memtype, u32 flags, char *label);
void persistent_ram_free(struct persistent_ram_zone *prz);
void persistent_ram_zap(struct persistent_ram_zone *prz);