diff options
| author | Sai Praneeth <sai.praneeth.prakhya@intel.com> | 2018-09-11 12:15:21 -0700 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-09-26 12:14:50 +0200 |
| commit | 9dbbedaa6171247c4c7c40b83f05b200a117c2e0 (patch) | |
| tree | f2cc64b3a22a8b678aa8bb4d21b0f49d5f6ae749 /include/linux/efi.h | |
| parent | bcb31c6225c2420344ebc1e87834252b8cf4923c (diff) | |
efi: Make efi_rts_work accessible to efi page fault handler
After the kernel has booted, if any accesses by firmware causes a page
fault, the efi page fault handler would freeze efi_rts_wq and schedules
a new process. To do this, the efi page fault handler needs
efi_rts_work. Hence, make it accessible.
There will be no race conditions in accessing this structure, because
all the calls to efi runtime services are already serialized.
Tested-by: Bhupesh Sharma <bhsharma@redhat.com>
Suggested-by: Matt Fleming <matt@codeblueprint.co.uk>
Based-on-code-from: Ricardo Neri <ricardo.neri@intel.com>
Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Diffstat (limited to 'include/linux/efi.h')
| -rw-r--r-- | include/linux/efi.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h index 22e4de9d3700..a929d2bf41fa 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -1662,6 +1662,42 @@ struct linux_efi_tpm_eventlog { extern int efi_tpm_eventlog_init(void); +/* efi_runtime_service() function identifiers */ +enum efi_rts_ids { + GET_TIME, + SET_TIME, + GET_WAKEUP_TIME, + SET_WAKEUP_TIME, + GET_VARIABLE, + GET_NEXT_VARIABLE, + SET_VARIABLE, + QUERY_VARIABLE_INFO, + GET_NEXT_HIGH_MONO_COUNT, + UPDATE_CAPSULE, + QUERY_CAPSULE_CAPS, +}; + +/* + * efi_runtime_work: Details of EFI Runtime Service work + * @arg<1-5>: EFI Runtime Service function arguments + * @status: Status of executing EFI Runtime Service + * @efi_rts_id: EFI Runtime Service function identifier + * @efi_rts_comp: Struct used for handling completions + */ +struct efi_runtime_work { + void *arg1; + void *arg2; + void *arg3; + void *arg4; + void *arg5; + efi_status_t status; + struct work_struct work; + enum efi_rts_ids efi_rts_id; + struct completion efi_rts_comp; +}; + +extern struct efi_runtime_work efi_rts_work; + /* Workqueue to queue EFI Runtime Services */ extern struct workqueue_struct *efi_rts_wq; |