29 Apr
2024
29 Apr
'24
1:24 p.m.
On Mon Apr 29, 2024 at 4:22 PM EEST, Jarkko Sakkinen wrote:
On Mon Apr 29, 2024 at 4:04 PM EEST, Jarkko Sakkinen wrote:
Fix these two bugs (1) by returning VM_FAULT_NOPAGE to the generic Linux fault handler so that no signal is sent to userspace, and (2) by replacing sgx_encl_free_epc_page() with sgx_free_epc_page() so that no EREMOVE is performed.
What is the collateral damage caused by ENCLS[EREMOVE]?
Have you measured cost of eremove on an empty page?
I tried to lookup for a thread from lore because I have a faint memory that it was concluded that its cost irrelevant. Please correct if I'm wrong.
Also pseudocode for EREMOVE supports this as it just returns without actually doing anything.
BR, Jarkko