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x86/sev: Export startup routines for later use

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Create aliases that expose routines that are part of the startup code to
other code in the core kernel, so that they can be called later as well.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250828102202.1849035-38-ardb+git@google.com
This commit is contained in:
Ard Biesheuvel 2025-08-28 12:22:17 +02:00 committed by Borislav Petkov (AMD)
parent d4077e6ad3
commit 05ce314ba5
2 changed files with 16 additions and 0 deletions
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14
arch/x86/boot/startup/exports.h Normal file
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@ -0,0 +1,14 @@
/*
* The symbols below are functions that are implemented by the startup code,
* but called at runtime by the SEV code residing in the core kernel.
*/
PROVIDE(early_set_pages_state = __pi_early_set_pages_state);
PROVIDE(early_snp_set_memory_private = __pi_early_snp_set_memory_private);
PROVIDE(early_snp_set_memory_shared = __pi_early_snp_set_memory_shared);
PROVIDE(get_hv_features = __pi_get_hv_features);
PROVIDE(sev_es_terminate = __pi_sev_es_terminate);
PROVIDE(snp_cpuid = __pi_snp_cpuid);
PROVIDE(snp_cpuid_get_table = __pi_snp_cpuid_get_table);
PROVIDE(svsm_issue_call = __pi_svsm_issue_call);
PROVIDE(svsm_process_result_codes = __pi_svsm_process_result_codes);

2
arch/x86/kernel/vmlinux.lds.S
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@ -535,3 +535,5 @@ xen_elfnote_entry_value =
xen_elfnote_phys32_entry_value =
ABSOLUTE(xen_elfnote_phys32_entry) + ABSOLUTE(pvh_start_xen - LOAD_OFFSET);
#endif
#include "../boot/startup/exports.h"