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acpi/nfit, libnvdimm: Introduce nvdimm_security_ops

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Some NVDIMMs, like the ones defined by the NVDIMM_FAMILY_INTEL command
set, expose a security capability to lock the DIMMs at poweroff and
require a passphrase to unlock them. The security model is derived from
ATA security. In anticipation of other DIMMs implementing a similar
scheme, and to abstract the core security implementation away from the
device-specific details, introduce nvdimm_security_ops.

Initially only a status retrieval operation, ->state(), is defined,
along with the base infrastructure and definitions for future
operations.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2018-12-05 23:39:29 -08:00 • committed by Dan Williams
parent 9db67581b9
commit f298939655
9 changed files with 158 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

27
include/linux/libnvdimm.h
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@ -155,6 +155,18 @@ static inline struct nd_blk_region_desc *to_blk_region_desc(
}
enum nvdimm_security_state {
NVDIMM_SECURITY_DISABLED,
NVDIMM_SECURITY_UNLOCKED,
NVDIMM_SECURITY_LOCKED,
NVDIMM_SECURITY_FROZEN,
NVDIMM_SECURITY_OVERWRITE,
};
struct nvdimm_security_ops {
enum nvdimm_security_state (*state)(struct nvdimm *nvdimm);
};
void badrange_init(struct badrange *badrange);
int badrange_add(struct badrange *badrange, u64 addr, u64 length);
void badrange_forget(struct badrange *badrange, phys_addr_t start,
@ -165,6 +177,7 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
struct nvdimm_bus_descriptor *nfit_desc);
void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
struct nvdimm_bus *nvdimm_to_bus(struct nvdimm *nvdimm);
struct nvdimm *to_nvdimm(struct device *dev);
struct nd_region *to_nd_region(struct device *dev);
struct device *nd_region_dev(struct nd_region *nd_region);
@ -178,14 +191,15 @@ void *nvdimm_provider_data(struct nvdimm *nvdimm);
struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
void *provider_data, const struct attribute_group **groups,
unsigned long flags, unsigned long cmd_mask, int num_flush,
struct resource *flush_wpq, const char *dimm_id);
struct resource *flush_wpq, const char *dimm_id,
const struct nvdimm_security_ops *sec_ops);
static inline struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus,
void *provider_data, const struct attribute_group **groups,
unsigned long flags, unsigned long cmd_mask, int num_flush,
struct resource *flush_wpq)
{
return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
cmd_mask, num_flush, flush_wpq, NULL);
cmd_mask, num_flush, flush_wpq, NULL, NULL);
}
const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
@ -214,6 +228,15 @@ void nvdimm_flush(struct nd_region *nd_region);
int nvdimm_has_flush(struct nd_region *nd_region);
int nvdimm_has_cache(struct nd_region *nd_region);
static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void *buf,
unsigned int buf_len, int *cmd_rc)
{
struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
}
#ifdef CONFIG_ARCH_HAS_PMEM_API
#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
void arch_wb_cache_pmem(void *addr, size_t size);