| commit | d0633194489de8af45173f818ef539968baeb965 | [log] [tgz] |
|---|---|---|
| author | Roland McGrath <mcgrathr@fuchsia.infra.roller.google.com> | Fri Feb 16 23:04:10 2024 +0000 |
| committer | Copybara-Service <copybara-worker@google.com> | Fri Feb 16 15:05:19 2024 -0800 |
| tree | 6b9090d8445fe2aac232c2289f3b30e259e3bc54 | |
| parent | 84fef62be7ad6dfda46027ab9a0a5d25ea0b1be0 [diff] |
[roll] Roll fuchsia [kernel][arm64] Refactor iframe setup slightly This refactors the assembly macros somewhat to reduce false sharing and make it easier to understand the from-EL0 and from-EL1 paths independently. In the EL1 path, it no longer saves and restores the SP_EL0 value in the iframe's USP slot, but instead stores the interrupted SP (which is always the same as `(iframe_t*)iframe + 1`) and ignores it on restore since an EL0 register value doesn't belong in an EL1 iframe but it's useful to have a uniform "interrupted SP" value to read out in iframe dumps and such whether for an EL0 or an EL1 iframe. In the EL0 path, this shaves off a few redundant instructions to fetch TPIDR_EL1. Original-Bug: 323463901 Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/985952 Original-Revision: 511494d943dd3ccd4b7b39dfd70814549b230636 GitOrigin-RevId: 490ab15d1905f3792972c8388bb26cbbe19b9526 Change-Id: Ice58f71368df7a21a2a50eb6f1824d1674b67728
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