linux-kernel - [tip: x86/sev] x86/sev: Export startup routines for later use

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Message-ID: <175698485474.1920.3751563806975208449.tip-bot2@tip-bot2>
Date: Thu, 04 Sep 2025 11:20:54 -0000
From: "tip-bot2 for Ard Biesheuvel" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Ard Biesheuvel <ardb@...nel.org>, "Borislav Petkov (AMD)" <bp@...en8.de>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/sev] x86/sev: Export startup routines for later use

The following commit has been merged into the x86/sev branch of tip:

Commit-ID:     05ce314ba5155d57c86f8f276cb17f78ac5fb4f0
Gitweb:        https://git.kernel.org/tip/05ce314ba5155d57c86f8f276cb17f78ac5fb4f0
Author:        Ard Biesheuvel <ardb@...nel.org>
AuthorDate:    Thu, 28 Aug 2025 12:22:17 +02:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Wed, 03 Sep 2025 17:59:49 +02:00

x86/sev: Export startup routines for later use

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@...nel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Link: https://lore.kernel.org/20250828102202.1849035-38-ardb+git@google.com
---
 arch/x86/boot/startup/exports.h | 14 ++++++++++++++
 arch/x86/kernel/vmlinux.lds.S   |  2 ++
 2 files changed, 16 insertions(+)
 create mode 100644 arch/x86/boot/startup/exports.h

diff --git a/arch/x86/boot/startup/exports.h b/arch/x86/boot/startup/exports.h
new file mode 100644
index 0000000..01d2363
--- /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 4fa0be7..5d5e3a9 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"