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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2022-02-22 21:57:39 +0300
committerBorislav Petkov <bp@suse.de>2022-02-23 21:14:16 +0300
commit655a0fa34b4f7ac6e2b1406fab15e52a7b6accb1 (patch)
tree689cb0c5e8729235a74ee74c7bb18bd36b4cd652 /arch/x86/coco
parent6198311093dabcafbe345d580c56b5d5a9ab5f3c (diff)
downloadlinux-655a0fa34b4f7ac6e2b1406fab15e52a7b6accb1.tar.xz
x86/coco: Explicitly declare type of confidential computing platform
The kernel derives the confidential computing platform type it is running as from sme_me_mask on AMD or by using hv_is_isolation_supported() on HyperV isolation VMs. This detection process will be more complicated as more platforms get added. Declare a confidential computing vendor variable explicitly and set it via cc_set_vendor() on the respective platform. [ bp: Massage commit message, fixup HyperV check. ] Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Link: https://lore.kernel.org/r/20220222185740.26228-4-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch/x86/coco')
-rw-r--r--arch/x86/coco/core.c29
1 files changed, 17 insertions, 12 deletions
diff --git a/arch/x86/coco/core.c b/arch/x86/coco/core.c
index 6a6ffcd978f6..476dcd198af5 100644
--- a/arch/x86/coco/core.c
+++ b/arch/x86/coco/core.c
@@ -9,18 +9,15 @@
#include <linux/export.h>
#include <linux/cc_platform.h>
-#include <linux/mem_encrypt.h>
-#include <asm/mshyperv.h>
+#include <asm/coco.h>
#include <asm/processor.h>
-static bool __maybe_unused intel_cc_platform_has(enum cc_attr attr)
+static enum cc_vendor vendor __ro_after_init;
+
+static bool intel_cc_platform_has(enum cc_attr attr)
{
-#ifdef CONFIG_INTEL_TDX_GUEST
- return false;
-#else
return false;
-#endif
}
/*
@@ -74,12 +71,20 @@ static bool hyperv_cc_platform_has(enum cc_attr attr)
bool cc_platform_has(enum cc_attr attr)
{
- if (sme_me_mask)
+ switch (vendor) {
+ case CC_VENDOR_AMD:
return amd_cc_platform_has(attr);
-
- if (hv_is_isolation_supported())
+ case CC_VENDOR_INTEL:
+ return intel_cc_platform_has(attr);
+ case CC_VENDOR_HYPERV:
return hyperv_cc_platform_has(attr);
-
- return false;
+ default:
+ return false;
+ }
}
EXPORT_SYMBOL_GPL(cc_platform_has);
+
+__init void cc_set_vendor(enum cc_vendor v)
+{
+ vendor = v;
+}