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7975207e0f
Legacy port emulation requires reading RAX register from GHCB page for SEV-SNP guest. This is the major difference between a regular guest and SEV-SNP enabled guest. Signed-off-by: Jinank Jain <jinankjain@microsoft.com> Signed-off-by: Muminul Islam <muislam@microsoft.com>
25 lines
1.2 KiB
Rust
25 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_SW_EXITINFO1_OFFSET: u64 = 0x398;
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pub const GHCB_SW_EXITINFO2_OFFSET: u64 = 0x3A0;
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