[PATCH v7 14/22] x86/sev: Export startup routines for later use

Ard Biesheuvel
2025-08-28T10:22:52Z

From: Ard Biesheuvel <ardb@kernel.org>

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>
---
arch/x86/boot/startup/exports.h | 14 ++++++++++++++
arch/x86/kernel/vmlinux.lds.S | 2 ++
2 files changed, 16 insertions(+)

diff --git a/arch/x86/boot/startup/exports.h b/arch/x86/boot/startup/exports.h
new file mode 100644
index 000000000000..01d2363dc445
--- /dev/null
+++ b/arch/x86/boot/startup/exports.h
@@ -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);
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 4fa0be732af1..5d5e3a95e1f9 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -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"
--
2.51.0.268.g9569e192d0-goog