linux-kernel - [tip: x86/microcode] x86/microcode/intel: Define staging state struct

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Message-ID: <176054714030.709179.18274721781740431275.tip-bot2@tip-bot2>
Date: Wed, 15 Oct 2025 16:52:20 -0000
From: "tip-bot2 for Chang S. Bae" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Chang S. Bae" <chang.seok.bae@...el.com>,
 "Borislav Petkov (AMD)" <bp@...en8.de>, Tony Luck <tony.luck@...el.com>,
 Anselm Busse <abusse@...zon.de>, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/microcode] x86/microcode/intel: Define staging state struct

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

Commit-ID:     079b90d4ba8dfa9603ecf400556894224021452d
Gitweb:        https://git.kernel.org/tip/079b90d4ba8dfa9603ecf400556894224021452d
Author:        Chang S. Bae <chang.seok.bae@...el.com>
AuthorDate:    Sun, 21 Sep 2025 15:48:38 -07:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Wed, 15 Oct 2025 16:47:31 +02:00

x86/microcode/intel: Define staging state struct

Define a staging_state struct to simplify function prototypes by consolidating
relevant data, instead of passing multiple local variables.

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Tested-by: Anselm Busse <abusse@...zon.de>
Link: https://lore.kernel.org/20250320234104.8288-1-chang.seok.bae@intel.com
---
 arch/x86/kernel/cpu/microcode/intel.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 216595a..d49a4e6 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -54,6 +54,23 @@ struct extended_sigtable {
 	struct extended_signature	sigs[];
 };
 
+/**
+ * struct staging_state - Track the current staging process state
+ *
+ * @mmio_base:		MMIO base address for staging
+ * @ucode_len:		Total size of the microcode image
+ * @chunk_size:		Size of each data piece
+ * @bytes_sent:		Total bytes transmitted so far
+ * @offset:		Current offset in the microcode image
+ */
+struct staging_state {
+	void __iomem		*mmio_base;
+	unsigned int		ucode_len;
+	unsigned int		chunk_size;
+	unsigned int		bytes_sent;
+	unsigned int		offset;
+};
+
 #define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
 #define EXT_HEADER_SIZE		(sizeof(struct extended_sigtable))
 #define EXT_SIGNATURE_SIZE	(sizeof(struct extended_signature))