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

Commit-ID:     b064043d9565786b385f85e6436ca5716bbd5552
Gitweb:        https://git.kernel.org/tip/b064043d9565786b385f85e6436ca5716bbd5552
Author:        Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
AuthorDate:    Mon, 04 Nov 2024 12:38:01 +02:00
Committer:     Dave Hansen <dave.hansen@linux.intel.com>
CommitterDate: Thu, 07 Nov 2024 10:26:37 -08:00

x86/tdx: Rename tdx_parse_tdinfo() to tdx_setup()

Rename tdx_parse_tdinfo() to tdx_setup() and move setting NOTIFY_ENABLES
there.

The function will be extended to adjust TD configuration.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/all/20241104103803.195705-3-kirill.shutemov%40linux.intel.com
---
 arch/x86/coco/tdx/tdx.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index c74bb9e..28b321a 100644
--- a/arch/x86/coco/tdx/tdx.c
+++ b/arch/x86/coco/tdx/tdx.c
@@ -194,7 +194,7 @@ static void __noreturn tdx_panic(const char *msg)
 		__tdx_hypercall(&args);
 }
 
-static void tdx_parse_tdinfo(u64 *cc_mask)
+static void tdx_setup(u64 *cc_mask)
 {
 	struct tdx_module_args args = {};
 	unsigned int gpa_width;
@@ -219,6 +219,9 @@ static void tdx_parse_tdinfo(u64 *cc_mask)
 	gpa_width = args.rcx & GENMASK(5, 0);
 	*cc_mask = BIT_ULL(gpa_width - 1);
 
+	/* Kernel does not use NOTIFY_ENABLES and does not need random #VEs */
+	tdg_vm_wr(TDCS_NOTIFY_ENABLES, 0, -1ULL);
+
 	/*
 	 * The kernel can not handle #VE's when accessing normal kernel
 	 * memory.  Ensure that no #VE will be delivered for accesses to
@@ -969,11 +972,11 @@ void __init tdx_early_init(void)
 	setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE);
 
 	cc_vendor = CC_VENDOR_INTEL;
-	tdx_parse_tdinfo(&cc_mask);
-	cc_set_mask(cc_mask);
 
-	/* Kernel does not use NOTIFY_ENABLES and does not need random #VEs */
-	tdg_vm_wr(TDCS_NOTIFY_ENABLES, 0, -1ULL);
+	/* Configure the TD */
+	tdx_setup(&cc_mask);
+
+	cc_set_mask(cc_mask);
 
 	/*
 	 * All bits above GPA width are reserved and kernel treats shared bit