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| author | Davidlohr Bueso <dave@stgolabs.net> | 2023-06-12 21:10:35 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-06-26 01:21:16 +0300 |
| commit | 48dcdbb16e5dc0947f949ce17bc2d09a625a0d5c (patch) | |
| tree | 2efe734b220cec7d3122913813509f199ef0ccdd /drivers/cxl/cxlmem.h | |
| parent | 0c36b6ad436a38b167af16e6c690c890b8b2df62 (diff) | |
| download | linux-48dcdbb16e5dc0947f949ce17bc2d09a625a0d5c.tar.xz | |
cxl/mem: Wire up Sanitization support
Implement support for CXL 3.0 8.2.9.8.5.1 Sanitize. This is done by
adding a security/sanitize' memdev sysfs file to trigger the operation
and extend the status file to make it poll(2)-capable for completion.
Unlike all other background commands, this is the only operation that
is special and monopolizes the device for long periods of time.
In addition to the traditional pmem security requirements, all regions
must also be offline in order to perform the operation. This permits
avoiding explicit global CPU cache management, relying instead on the
implict cache management when a region transitions between
CXL_CONFIG_ACTIVE and CXL_CONFIG_COMMIT.
The expectation is that userspace can use it such as:
cxl disable-memdev memX
echo 1 > /sys/bus/cxl/devices/memX/security/sanitize
cxl wait-sanitize memX
cxl enable-memdev memX
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/20230612181038.14421-5-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 698cd10aea4a..5b84f27fc76a 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -267,12 +267,14 @@ struct cxl_poison_state { * @poll: polling for sanitization is enabled, device has no mbox irq support * @poll_tmo_secs: polling timeout * @poll_dwork: polling work item + * @sanitize_node: sanitation sysfs file to notify */ struct cxl_security_state { unsigned long state; bool poll; int poll_tmo_secs; struct delayed_work poll_dwork; + struct kernfs_node *sanitize_node; }; /** @@ -746,6 +748,8 @@ static inline void cxl_mem_active_dec(void) } #endif +int cxl_mem_sanitize(struct cxl_dev_state *cxlds, u16 cmd); + struct cxl_hdm { struct cxl_component_regs regs; unsigned int decoder_count; |