David Tolnay 42e5fbd9f3 tpm: Handle send+recv as a single descriptor chain ... During review of CL:1387655 we observed that it shouldn't be necessary for both vtpm_op_send and vtpm_op_recv to perform virtqueue kicks. It should be sufficient for vtpm_op_send to place both an output buffer and an input buffer on the virtio queue as a single descriptor chain, and perform a single kick that executes both operations. This requires a larger virtio queue because a single virtio buffer cannot be both read and written. BUG=chromium:911799 TEST=run TPM playground program inside crosvm Change-Id: I6822efc3318a3952f91f64904e0434d916beae97 Reviewed-on: https://chromium-review.googlesource.com/1465642 Commit-Ready: David Tolnay <dtolnay@chromium.org> Tested-by: David Tolnay <dtolnay@chromium.org> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Zach Reizner <zachr@chromium.org>		2019-02-21 06:29:41 -08:00
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src	tpm: Handle send+recv as a single descriptor chain	2019-02-21 06:29:41 -08:00
Cargo.toml	Implement PIT.	2019-01-31 18:19:12 -08:00