[RFT PATCH v2 18/23] x86/sev: Export startup routines for ordinary use

[Ard Biesheuvel <ardb+git@google.com>]

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.

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..5cbc14c64d61
--- /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_check_cpu_features	= __pi_sev_es_check_cpu_features);
+PROVIDE(sev_es_negotiate_protocol	= __pi_sev_es_negotiate_protocol);
+PROVIDE(sev_es_terminate		= __pi_sev_es_terminate);
+PROVIDE(snp_cpuid			= __pi_snp_cpuid);
+PROVIDE(snp_cpuid_get_table		= __pi_snp_cpuid_get_table);
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 9340c74b680d..4aaa1693b262 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -517,3 +517,5 @@ 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"
-- 
2.49.0.906.g1f30a19c02-goog