linux-kernel - [PATCH v2 1/3] platform/x86/amd/pmf: Add missing __iomem attribute to policy

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Date: Fri, 23 Feb 2024 17:38:59 +0100
From: Armin Wolf <W_Armin@....de>
To: Shyam-sundar.S-k@....com,
	mika.westerberg@...ux.intel.com
Cc: sathyanarayanan.kuppuswamy@...ux.intel.com,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/3] platform/x86/amd/pmf: Add missing __iomem attribute to policy_base

The value of policy_base is the return value of a devm_ioremap call,
which returns a __iomem pointer instead of an regular pointer.
Add the missing __iomem attribute.

Compile-tested only.

Signed-off-by: Armin Wolf <W_Armin@....de>
---
 drivers/platform/x86/amd/pmf/pmf.h    | 2 +-
 drivers/platform/x86/amd/pmf/tee-if.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index 16999c5b334f..bcf777a5659a 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -229,7 +229,7 @@ struct amd_pmf_dev {
 	struct delayed_work pb_work;
 	struct pmf_action_table *prev_data;
 	u64 policy_addr;
-	void *policy_base;
+	void __iomem *policy_base;
 	bool smart_pc_enabled;
 };

diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index f8c0177afb0d..16973bebf55f 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -346,7 +346,7 @@ static int amd_pmf_get_bios_buffer(struct amd_pmf_dev *dev)
 	if (!dev->policy_base)
 		return -ENOMEM;

-	memcpy(dev->policy_buf, dev->policy_base, dev->policy_sz);
+	memcpy_fromio(dev->policy_buf, dev->policy_base, dev->policy_sz);

 	amd_pmf_hex_dump_pb(dev);
 	if (pb_side_load)
--
2.39.2