linux-kernel - [PATCH v2 1/2] x86/e820: Expose API to update e820 kexec and firmware tables externally.

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Date: Mon, 15 Apr 2024 21:09:10 +0000
From: Ashish Kalra <Ashish.Kalra@....com>
To: <linux-tip-commits@...r.kernel.org>
CC: <bp@...en8.de>, <thomas.lendacky@....com>, <michael.roth@....com>,
	<x86@...nel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 1/2] x86/e820: Expose API to update e820 kexec and firmware tables externally.

From: Ashish Kalra <ashish.kalra@....com>

Export the API interfaces to update the e820_table_kexec and
e820_table_firmware.

Signed-off-by: Ashish Kalra <ashish.kalra@....com>
---
 arch/x86/include/asm/e820/api.h | 3 +++
 arch/x86/kernel/e820.c          | 7 ++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/e820/api.h b/arch/x86/include/asm/e820/api.h
index e8f58ddd06d9..09fe1ddcdf2b 100644
--- a/arch/x86/include/asm/e820/api.h
+++ b/arch/x86/include/asm/e820/api.h
@@ -18,6 +18,9 @@ extern void e820__range_add   (u64 start, u64 size, enum e820_type type);
 extern u64  e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type);
 extern u64  e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type);
 
+extern u64 e820__range_update_kexec(u64 start, u64 size, enum e820_type old_type, enum e820_type  new_type);
+extern u64 e820__range_update_firmware(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type);
+
 extern void e820__print_table(char *who);
 extern int  e820__update_table(struct e820_table *table);
 extern void e820__update_table_print(void);
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 6f1b379e3b38..c59d1bbbe3f2 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -532,7 +532,12 @@ u64 __init e820__range_update(u64 start, u64 size, enum e820_type old_type, enum
 	return __e820__range_update(e820_table, start, size, old_type, new_type);
 }
 
-static u64 __init e820__range_update_kexec(u64 start, u64 size, enum e820_type old_type, enum e820_type  new_type)
+u64 __init e820__range_update_firmware(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type)
+{
+	return __e820__range_update(e820_table_firmware, start, size, old_type, new_type);
+}
+
+u64 __init e820__range_update_kexec(u64 start, u64 size, enum e820_type old_type, enum e820_type  new_type)
 {
 	return __e820__range_update(e820_table_kexec, start, size, old_type, new_type);
 }
-- 
2.34.1