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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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8fd0310db9
Previously we didn't handle extended guest requests at all and always returned an error. This lead to issues with some guests that expected extended requests to succeed. Instead, handle extended requests like normal requests and write zeros to the extended area to signal to the guest that we don't want to supply any additional certificate data. Signed-off-by: Tom Dohrmann <erbse.13@gmx.de>
26 lines
1.2 KiB
Rust
26 lines
1.2 KiB
Rust
// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
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//
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// Copyright © 2020, Microsoft Corporation
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//
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// Reference: https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/specifications/56860.pdf
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// Chapter 10
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pub const SIG_R_COMPONENT_SIZE_IN_BYTES: usize = 72;
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pub const SIG_R_AND_S_COMPONENT_SIZE_IN_BYTES: usize = 144;
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pub const ECDSA_CURVE_ID_SIZE_IN_BYTES: usize = 4;
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pub const ECDSA_SIG_X_COMPONENT_SIZE_IN_BYTES: usize = 72;
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pub const ECDSA_SIG_Y_COMPONENT_SIZE_IN_BYTES: usize = 72;
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pub const ECDSA_SIG_X_COMPONENT_START: usize = ECDSA_CURVE_ID_SIZE_IN_BYTES;
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pub const ECDSA_SIG_X_COMPONENT_END: usize =
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ECDSA_SIG_X_COMPONENT_START + ECDSA_SIG_X_COMPONENT_SIZE_IN_BYTES;
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pub const ECDSA_SIG_Y_COMPONENT_START: usize = ECDSA_SIG_X_COMPONENT_END;
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pub const ECDSA_SIG_Y_COMPONENT_END: usize =
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ECDSA_SIG_X_COMPONENT_END + ECDSA_SIG_Y_COMPONENT_SIZE_IN_BYTES;
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// These constants are derived from GHCB spec Sect. 2.6 Table 3 GHCB Layout
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// Link: https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/specifications/56421.pdf
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pub const GHCB_RAX_OFFSET: u64 = 0x01F8;
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pub const GHCB_RBX_OFFSET: u64 = 0x0318;
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pub const GHCB_SW_EXITINFO1_OFFSET: u64 = 0x398;
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pub const GHCB_SW_EXITINFO2_OFFSET: u64 = 0x3A0;
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