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Date: Tue, 6 Jun 2023 17:26:35 +0300
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To: Borislav Petkov <bp@...en8.de>, Andy Lutomirski <luto@...nel.org>,
Dave Hansen <dave.hansen@...el.com>,
Sean Christopherson <seanjc@...gle.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Joerg Roedel <jroedel@...e.de>,
Ard Biesheuvel <ardb@...nel.org>
Cc: Andi Kleen <ak@...ux.intel.com>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@...ux.intel.com>,
David Rientjes <rientjes@...gle.com>,
Vlastimil Babka <vbabka@...e.cz>,
Tom Lendacky <thomas.lendacky@....com>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>,
Paolo Bonzini <pbonzini@...hat.com>,
Ingo Molnar <mingo@...hat.com>,
Dario Faggioli <dfaggioli@...e.com>,
Mike Rapoport <rppt@...nel.org>,
David Hildenbrand <david@...hat.com>,
Mel Gorman <mgorman@...hsingularity.net>,
marcelo.cerri@...onical.com, tim.gardner@...onical.com,
khalid.elmously@...onical.com, philip.cox@...onical.com,
aarcange@...hat.com, peterx@...hat.com, x86@...nel.org,
linux-mm@...ck.org, linux-coco@...ts.linux.dev,
linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Dave Hansen <dave.hansen@...ux.intel.com>
Subject: [PATCHv14 7/9] x86/tdx: Make _tdx_hypercall() and __tdx_module_call() available in boot stub
Memory acceptance requires a hypercall and one or multiple module calls.
Make helpers for the calls available in boot stub. It has to accept
memory where kernel image and initrd are placed.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Reviewed-by: Dave Hansen <dave.hansen@...ux.intel.com>
---
arch/x86/coco/tdx/tdx.c | 32 -------------------
arch/x86/include/asm/shared/tdx.h | 51 +++++++++++++++++++++++++++++++
arch/x86/include/asm/tdx.h | 19 ------------
3 files changed, 51 insertions(+), 51 deletions(-)
diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index e146b599260f..e6f4c2758a68 100644
--- a/arch/x86/coco/tdx/tdx.c
+++ b/arch/x86/coco/tdx/tdx.c
@@ -14,20 +14,6 @@
#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_GET_REPORT 4
-#define TDX_ACCEPT_PAGE 6
-#define TDX_WR 8
-
-/* TDCS fields. To be used by TDG.VM.WR and TDG.VM.RD module calls */
-#define TDCS_NOTIFY_ENABLES 0x9100000000000010
-
-/* TDX hypercall Leaf IDs */
-#define TDVMCALL_MAP_GPA 0x10001
-#define TDVMCALL_REPORT_FATAL_ERROR 0x10003
-
/* MMIO direction */
#define EPT_READ 0
#define EPT_WRITE 1
@@ -51,24 +37,6 @@
#define TDREPORT_SUBTYPE_0 0
-/*
- * Wrapper for standard use of __tdx_hypercall with no output aside from
- * return code.
- */
-static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15)
-{
- struct tdx_hypercall_args args = {
- .r10 = TDX_HYPERCALL_STANDARD,
- .r11 = fn,
- .r12 = r12,
- .r13 = r13,
- .r14 = r14,
- .r15 = r15,
- };
-
- return __tdx_hypercall(&args);
-}
-
/* Called from __tdx_hypercall() for unrecoverable failure */
noinstr void __tdx_hypercall_failed(void)
{
diff --git a/arch/x86/include/asm/shared/tdx.h b/arch/x86/include/asm/shared/tdx.h
index 2631e01f6e0f..1ff0ee822961 100644
--- a/arch/x86/include/asm/shared/tdx.h
+++ b/arch/x86/include/asm/shared/tdx.h
@@ -10,6 +10,20 @@
#define TDX_CPUID_LEAF_ID 0x21
#define TDX_IDENT "IntelTDX "
+/* TDX module Call Leaf IDs */
+#define TDX_GET_INFO 1
+#define TDX_GET_VEINFO 3
+#define TDX_GET_REPORT 4
+#define TDX_ACCEPT_PAGE 6
+#define TDX_WR 8
+
+/* TDCS fields. To be used by TDG.VM.WR and TDG.VM.RD module calls */
+#define TDCS_NOTIFY_ENABLES 0x9100000000000010
+
+/* TDX hypercall Leaf IDs */
+#define TDVMCALL_MAP_GPA 0x10001
+#define TDVMCALL_REPORT_FATAL_ERROR 0x10003
+
#ifndef __ASSEMBLY__
/*
@@ -37,8 +51,45 @@ struct tdx_hypercall_args {
u64 __tdx_hypercall(struct tdx_hypercall_args *args);
u64 __tdx_hypercall_ret(struct tdx_hypercall_args *args);
+/*
+ * Wrapper for standard use of __tdx_hypercall with no output aside from
+ * return code.
+ */
+static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15)
+{
+ struct tdx_hypercall_args args = {
+ .r10 = TDX_HYPERCALL_STANDARD,
+ .r11 = fn,
+ .r12 = r12,
+ .r13 = r13,
+ .r14 = r14,
+ .r15 = r15,
+ };
+
+ return __tdx_hypercall(&args);
+}
+
+
/* Called from __tdx_hypercall() for unrecoverable failure */
void __tdx_hypercall_failed(void);
+/*
+ * Used in __tdx_module_call() to gather the output registers' values of the
+ * TDCALL instruction when requesting services from the TDX module. This is a
+ * software only structure and not part of the TDX module/VMM ABI
+ */
+struct tdx_module_output {
+ u64 rcx;
+ u64 rdx;
+ u64 r8;
+ u64 r9;
+ u64 r10;
+ u64 r11;
+};
+
+/* Used to communicate with the TDX module */
+u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9,
+ struct tdx_module_output *out);
+
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_SHARED_TDX_H */
diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h
index 28d889c9aa16..234197ec17e4 100644
--- a/arch/x86/include/asm/tdx.h
+++ b/arch/x86/include/asm/tdx.h
@@ -20,21 +20,6 @@
#ifndef __ASSEMBLY__
-/*
- * Used to gather the output registers values of the TDCALL and SEAMCALL
- * instructions when requesting services from the TDX module.
- *
- * This is a software only structure and not part of the TDX module/VMM ABI.
- */
-struct tdx_module_output {
- u64 rcx;
- u64 rdx;
- u64 r8;
- u64 r9;
- u64 r10;
- u64 r11;
-};
-
/*
* Used by the #VE exception handler to gather the #VE exception
* info from the TDX module. This is a software only structure
@@ -55,10 +40,6 @@ struct ve_info {
void __init tdx_early_init(void);
-/* Used to communicate with the TDX module */
-u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9,
- struct tdx_module_output *out);
-
void tdx_get_ve_info(struct ve_info *ve);
bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve);
--
2.39.3
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