Add new TDCALL functions to support TD partitioning #714
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TD page accept call can fail sometimes with `TDX_OPERAND_BUSY` error code, in such cases simply retry the operation. Signed-off-by: Jason Chen CJ <[email protected]> Signed-off-by: Vijay Dhanraj <[email protected]>
This is a precursor to introducing `td_accept_memory` which will accept both normal 4K pages as well as 2M huge pages. No functional change is introduced. Signed-off-by: Vijay Dhanraj <[email protected]>
This commit introduces `td_accept_memory` to accept a range of either 4K normal pages or 2M huge pages. This is basically a helper function which is wrapped around `td_accept_pages` and initializes the pages to zero using the TD ephemeral private key. Signed-off-by: Peter Fang <[email protected]> Signed-off-by: Vijay Dhanraj <[email protected]>
tdcall_vm_read/write is to access TD-scope meta field of a TD and tdcall_vp_read/write is to access vCPU-scope meta field of a TD. Signed-off-by: Jason Chen CJ <[email protected]> Signed-off-by: Chuanxiao Dong <[email protected]> Signed-off-by: Vijay Dhanraj <[email protected]>
Add tdcall_vp_invept/invvpid to provide SEPT flushing support Signed-off-by: Jason Chen CJ <[email protected]> Signed-off-by: Vijay Dhanraj <[email protected]>
jyao1
reviewed
Jun 18, 2024
Current asm_td_call implementation immediately returns on exit without saving guest vmexit reasons. Extend asm_td_call to save the guest vmexit reasons as part of RAX and also introduce `tdcall_vp_enter` interface to enter TDP guest. Signed-off-by: Jason Chen CJ <[email protected]> Signed-off-by: Vijay Dhanraj <[email protected]>
Add `tdcall_mem_page_attr_wr` interface to write memory attributes of a private page. It is also used to create or remove L2 page aliases as required. Signed-off-by: Chuanxiao Dong <[email protected]> Signed-off-by: Vijay Dhanraj <[email protected]>
jyao1
approved these changes
Jun 19, 2024
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Fixes: #707
Added the following TDCALL support as part of this PR.