From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, Shuah Khan <shuah@kernel.org>,
Jonathan Corbet <corbet@lwn.net>
Cc: "H . Peter Anvin" <hpa@zytor.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Tony Luck <tony.luck@intel.com>, Kai Huang <kai.huang@intel.com>,
Wander Lairson Costa <wander@redhat.com>,
Isaku Yamahata <isaku.yamahata@gmail.com>,
marcelo.cerri@canonical.com, tim.gardner@canonical.com,
khalid.elmously@canonical.com, philip.cox@canonical.com,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-doc@vger.kernel.org
Subject: [PATCH v14 1/3] x86/tdx: Make __tdx_module_call() usable in driver module
Date: Wed, 28 Sep 2022 14:55:33 -0700 [thread overview]
Message-ID: <20220928215535.26527-2-sathyanarayanan.kuppuswamy@linux.intel.com> (raw)
In-Reply-To: <20220928215535.26527-1-sathyanarayanan.kuppuswamy@linux.intel.com>
To support TDX attestation, the TDX guest user interface driver must
use the __tdx module_call() function in the driver to allow the user to
obtain the TDREPORT.
So export the __tdx_module_call() and move the TDX Module IDs to
asm/tdx.h.
This is a preparatory patch for adding attestation support.
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
Changes since v13:
* None
arch/x86/coco/tdx/tdcall.S | 2 ++
arch/x86/coco/tdx/tdx.c | 5 -----
arch/x86/include/asm/tdx.h | 5 +++++
3 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/x86/coco/tdx/tdcall.S b/arch/x86/coco/tdx/tdcall.S
index f9eb1134f22d..47a1534946c8 100644
--- a/arch/x86/coco/tdx/tdcall.S
+++ b/arch/x86/coco/tdx/tdcall.S
@@ -3,6 +3,7 @@
#include <asm/asm.h>
#include <asm/frame.h>
#include <asm/unwind_hints.h>
+#include <asm/export.h>
#include <linux/linkage.h>
#include <linux/bits.h>
@@ -75,6 +76,7 @@ SYM_FUNC_START(__tdx_module_call)
FRAME_END
RET
SYM_FUNC_END(__tdx_module_call)
+EXPORT_SYMBOL_GPL(__tdx_module_call);
/*
* __tdx_hypercall() - Make hypercalls to a TDX VMM using TDVMCALL leaf
diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index 928dcf7a20d9..2dcc6021aa43 100644
--- a/arch/x86/coco/tdx/tdx.c
+++ b/arch/x86/coco/tdx/tdx.c
@@ -12,11 +12,6 @@
#include <asm/insn-eval.h>
#include <asm/pgtable.h>
-/* TDX module Call Leaf IDs */
-#define TDX_GET_INFO 1
-#define TDX_GET_VEINFO 3
-#define TDX_ACCEPT_PAGE 6
-
/* TDX hypercall Leaf IDs */
#define TDVMCALL_MAP_GPA 0x10001
diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h
index 020c81a7c729..34c00d8a5263 100644
--- a/arch/x86/include/asm/tdx.h
+++ b/arch/x86/include/asm/tdx.h
@@ -18,6 +18,11 @@
#define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40))
#define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000))
+/* TDX module Call Leaf IDs */
+#define TDX_GET_INFO 1
+#define TDX_GET_VEINFO 3
+#define TDX_ACCEPT_PAGE 6
+
#ifndef __ASSEMBLY__
/*
--
2.34.1
next prev parent reply other threads:[~2022-09-28 21:56 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-28 21:55 [PATCH v14 0/3] Add TDX Guest Attestation support Kuppuswamy Sathyanarayanan
2022-09-28 21:55 ` Kuppuswamy Sathyanarayanan [this message]
2022-10-12 10:18 ` [PATCH v14 1/3] x86/tdx: Make __tdx_module_call() usable in driver module Borislav Petkov
2022-10-12 13:35 ` Sathyanarayanan Kuppuswamy
2022-10-12 14:27 ` Borislav Petkov
2022-10-12 15:44 ` Sathyanarayanan Kuppuswamy
2022-10-12 16:23 ` Greg Kroah-Hartman
2022-10-12 17:13 ` Sathyanarayanan Kuppuswamy
2022-10-12 17:26 ` Greg Kroah-Hartman
2022-10-12 18:11 ` Sathyanarayanan Kuppuswamy
2022-09-28 21:55 ` [PATCH v14 2/3] virt: Add TDX guest driver Kuppuswamy Sathyanarayanan
2022-09-29 18:02 ` Wander Lairson Costa
2022-09-29 18:11 ` Sathyanarayanan Kuppuswamy
2022-09-30 12:22 ` Greg Kroah-Hartman
2022-09-30 15:27 ` Sathyanarayanan Kuppuswamy
2022-10-12 15:47 ` Borislav Petkov
2022-10-12 23:01 ` Sathyanarayanan Kuppuswamy
2022-10-13 13:21 ` Borislav Petkov
2022-09-28 21:55 ` [PATCH v14 3/3] selftests: tdx: Test TDX attestation GetReport support Kuppuswamy Sathyanarayanan
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