From: "Gerd Hoffmann" <kraxel@redhat.com>
To: devel@edk2.groups.io
Cc: Jiewen Yao <jiewen.yao@intel.com>,
Oliver Steffen <osteffen@redhat.com>,
Laszlo Ersek <lersek@redhat.com>,
Michael Roth <michael.roth@amd.com>,
Erdem Aktas <erdemaktas@google.com>,
Gerd Hoffmann <kraxel@redhat.com>, Min Xu <min.m.xu@intel.com>,
Ard Biesheuvel <ardb+tianocore@kernel.org>,
Tom Lendacky <thomas.lendacky@amd.com>
Subject: [edk2-devel] [PATCH v2 08/10] OvmfPkg/ResetVector: wire up 5-level paging for TDX
Date: Fri, 1 Mar 2024 08:44:00 +0100 [thread overview]
Message-ID: <20240301074402.98625-9-kraxel@redhat.com> (raw)
In-Reply-To: <20240301074402.98625-1-kraxel@redhat.com>
BSP workflow is quite simliar to the non-coco case.
TDX_WORK_AREA_PGTBL_READY is used to record the paging mode:
1 == 4-level paging
2 == 5-level paging
APs will look at TDX_WORK_AREA_PGTBL_READY to figure whenever
they should enable 5-level paging or not.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
OvmfPkg/ResetVector/Ia32/IntelTdx.asm | 13 ++++++++++++-
OvmfPkg/ResetVector/Ia32/PageTables64.asm | 16 ++++++++++++++++
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/OvmfPkg/ResetVector/Ia32/IntelTdx.asm b/OvmfPkg/ResetVector/Ia32/IntelTdx.asm
index c6b86019dfb9..7d775591a05b 100644
--- a/OvmfPkg/ResetVector/Ia32/IntelTdx.asm
+++ b/OvmfPkg/ResetVector/Ia32/IntelTdx.asm
@@ -179,7 +179,7 @@ InitTdx:
;
; Modified: EAX, EDX
;
-; 0-NonTdx, 1-TdxBsp, 2-TdxAps
+; 0-NonTdx, 1-TdxBsp, 2-TdxAps, 3-TdxAps5Level
;
CheckTdxFeaturesBeforeBuildPagetables:
xor eax, eax
@@ -200,6 +200,17 @@ TdxPostBuildPageTables:
mov byte[TDX_WORK_AREA_PGTBL_READY], 1
OneTimeCallRet TdxPostBuildPageTables
+%if PG_5_LEVEL
+
+;
+; Set byte[TDX_WORK_AREA_PGTBL_READY] to 2
+;
+TdxPostBuildPageTables5Level:
+ mov byte[TDX_WORK_AREA_PGTBL_READY], 2
+ OneTimeCallRet TdxPostBuildPageTables5Level
+
+%endif
+
;
; Check if TDX is enabled
;
diff --git a/OvmfPkg/ResetVector/Ia32/PageTables64.asm b/OvmfPkg/ResetVector/Ia32/PageTables64.asm
index e15945da0476..b922c845f297 100644
--- a/OvmfPkg/ResetVector/Ia32/PageTables64.asm
+++ b/OvmfPkg/ResetVector/Ia32/PageTables64.asm
@@ -44,6 +44,7 @@ BITS 32
%define TDX_BSP 1
%define TDX_AP 2
+%define TDX_AP_5_LEVEL 3
;
; For OVMF, build some initial page tables at
@@ -214,7 +215,14 @@ SetCr3ForPageTables64:
je TdxBspInit
cmp eax, TDX_AP
je SetCr3
+%if PG_5_LEVEL
+ cmp eax, TDX_AP_5_LEVEL
+ jne CheckForSev
+ Enable5LevelPaging
+ jmp SetCr3
+%endif
+CheckForSev:
; Check whether the SEV is active and populate the SevEsWorkArea
OneTimeCall CheckSevFeatures
cmp byte[WORK_AREA_GUEST_TYPE], 1
@@ -253,6 +261,14 @@ TdxBspInit:
; TDX BSP workflow
;
ClearOvmfPageTables
+%if PG_5_LEVEL
+ Check5LevelPaging Tdx4Level
+ CreatePageTables5Level 0
+ OneTimeCall TdxPostBuildPageTables5Level
+ Enable5LevelPaging
+ jmp SetCr3
+Tdx4Level:
+%endif
CreatePageTables4Level 0
OneTimeCall TdxPostBuildPageTables
jmp SetCr3
--
2.44.0
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next prev parent reply other threads:[~2024-03-01 7:44 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-01 7:43 [edk2-devel] [PATCH v2 00/10] OvmfPkg/ResetVector: cleanup and add 5-level paging support Gerd Hoffmann
2024-03-01 7:43 ` [edk2-devel] [PATCH v2 01/10] OvmfPkg/ResetVector: improve page table flag names Gerd Hoffmann
2024-03-01 7:43 ` [edk2-devel] [PATCH v2 02/10] OvmfPkg/ResetVector: add ClearOvmfPageTables macro Gerd Hoffmann
2024-03-01 7:43 ` [edk2-devel] [PATCH v2 03/10] OvmfPkg/ResetVector: add CreatePageTables4Level macro Gerd Hoffmann
2024-03-01 7:43 ` [edk2-devel] [PATCH v2 04/10] OvmfPkg/ResetVector: split TDX BSP workflow Gerd Hoffmann
2024-03-01 7:43 ` [edk2-devel] [PATCH v2 05/10] OvmfPkg/ResetVector: split SEV and non-CoCo workflows Gerd Hoffmann
2024-03-01 7:43 ` [edk2-devel] [PATCH v2 06/10] OvmfPkg/ResetVector: add 5-level paging support Gerd Hoffmann
2024-03-01 12:48 ` Laszlo Ersek
2024-03-01 7:43 ` [edk2-devel] [PATCH v2 07/10] OvmfPkg/ResetVector: print post codes for 4/5 level paging Gerd Hoffmann
2024-03-01 7:44 ` Gerd Hoffmann [this message]
2024-03-01 12:55 ` [edk2-devel] [PATCH v2 08/10] OvmfPkg/ResetVector: wire up 5-level paging for TDX Laszlo Ersek
2024-03-01 14:32 ` Gerd Hoffmann
2024-03-01 7:44 ` [edk2-devel] [PATCH v2 09/10] OvmfPkg/ResetVector: leave SEV VC handler installed longer Gerd Hoffmann
2024-03-01 13:00 ` Laszlo Ersek
2024-03-01 14:52 ` Gerd Hoffmann
2024-03-01 17:18 ` Laszlo Ersek
2024-03-01 7:44 ` [edk2-devel] [PATCH v2 10/10] OvmfPkg/ResetVector: wire up 5-level paging for SEV Gerd Hoffmann
2024-03-01 13:04 ` Laszlo Ersek
2024-03-01 17:28 ` [edk2-devel] [PATCH v2 00/10] OvmfPkg/ResetVector: cleanup and add 5-level paging support Laszlo Ersek
2024-03-01 19:01 ` Laszlo Ersek
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