[PATCH v3 14/19] x86/coco: Make cc_set_mask() static inline

Ard Biesheuvel
2024-01-29T18:06:03Z

From: Ard Biesheuvel <ardb@kernel.org>

Setting the cc_mask global variable may be done early in the boot while
running fromm a 1:1 translation. This code is built with -fPIC in order
to support this.

Make cc_set_mask() static inline so it can execute safely in this
context as well.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/x86/coco/core.c | 7 +------
arch/x86/include/asm/coco.h | 8 +++++++-
2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/x86/coco/core.c b/arch/x86/coco/core.c
index eeec9986570e..d07be9d05cd0 100644
--- a/arch/x86/coco/core.c
+++ b/arch/x86/coco/core.c
@@ -14,7 +14,7 @@
#include <asm/processor.h>

enum cc_vendor cc_vendor __ro_after_init = CC_VENDOR_NONE;
-static u64 cc_mask __ro_after_init;
+u64 cc_mask __ro_after_init;

static bool noinstr intel_cc_platform_has(enum cc_attr attr)
{
@@ -148,8 +148,3 @@ u64 cc_mkdec(u64 val)
}
}
EXPORT_SYMBOL_GPL(cc_mkdec);
-
-__init void cc_set_mask(u64 mask)
-{
- cc_mask = mask;
-}
diff --git a/arch/x86/include/asm/coco.h b/arch/x86/include/asm/coco.h
index 6ae2d16a7613..ecc29d6136ad 100644
--- a/arch/x86/include/asm/coco.h
+++ b/arch/x86/include/asm/coco.h
@@ -13,7 +13,13 @@ enum cc_vendor {
extern enum cc_vendor cc_vendor;

#ifdef CONFIG_ARCH_HAS_CC_PLATFORM
-void cc_set_mask(u64 mask);
+static inline void cc_set_mask(u64 mask)
+{
+ extern u64 cc_mask;
+
+ cc_mask = mask;
+}
+
u64 cc_mkenc(u64 val);
u64 cc_mkdec(u64 val);
#else
--
2.43.0.429.g432eaa2c6b-goog