public inbox for devel@edk2.groups.io
 help / color / mirror / Atom feed
From: "Lendacky, Thomas" <thomas.lendacky@amd.com>
To: "devel@edk2.groups.io" <devel@edk2.groups.io>
Cc: Jordan Justen <jordan.l.justen@intel.com>,
	Laszlo Ersek <lersek@redhat.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Michael D Kinney <michael.d.kinney@intel.com>,
	Liming Gao <liming.gao@intel.com>,
	Eric Dong <eric.dong@intel.com>, Ray Ni <ray.ni@intel.com>,
	"Singh, Brijesh" <brijesh.singh@amd.com>
Subject: [RFC PATCH v2 37/44] OvmfPkg: Add support for SEV-ES AP reset vector re-directing
Date: Thu, 19 Sep 2019 19:53:05 +0000	[thread overview]
Message-ID: <61fd6897ca552edbb39ab2f2ee0cce0b505ee71c.1568922729.git.thomas.lendacky@amd.com> (raw)
In-Reply-To: <cover.1568922728.git.thomas.lendacky@amd.com>

From: Tom Lendacky <thomas.lendacky@amd.com>

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198

A hypervisor is not allowed to update an SEV-ES guests register state,
so when booting an SEV-ES guest AP, the hypervisor is not allowed to
set the RIP to the guest requested value. Instead an SEV-ES AP must be
re-directed from within the guest to the actual requested staring location
as specified in the INIT-SIPI-SIPI sequence.

Provide reset vector code that contains support to jump to the desired
RIP location after having been started. This is required for only the
very first AP reset.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm | 80 ++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm

diff --git a/OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm b/OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm
new file mode 100644
index 000000000000..1ac8b7ca7e85
--- /dev/null
+++ b/OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm
@@ -0,0 +1,80 @@
+;------------------------------------------------------------------------------
+; @file
+; First code executed by processor after resetting.
+; Derived from UefiCpuPkg/ResetVector/Vtf0/Ia16/ResetVectorVtf0.asm
+;
+; Copyright (c) 2019, AMD Inc. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;------------------------------------------------------------------------------
+
+BITS    16
+
+ALIGN   16
+
+;
+; Pad the image size to 4k when page tables are in VTF0
+;
+; If the VTF0 image has page tables built in, then we need to make
+; sure the end of VTF0 is 4k above where the page tables end.
+;
+; This is required so the page tables will be 4k aligned when VTF0 is
+; located just below 0x100000000 (4GB) in the firmware device.
+;
+%ifdef ALIGN_TOP_TO_4K_FOR_PAGING
+    TIMES (0x1000 - ($ - EndOfPageTables) - 0x20) DB 0
+%endif
+
+;
+; SEV-ES Processor Reset support
+;
+; standardProcessorSevEsReset:    (0xffffffd0)
+;   When using the Application Processors entry point, always perform a
+;   far jump to the RIP/CS value contained at this location.  This will
+;   default to EarlyBspInitReal16 unless specifically overridden.
+
+standardProcessorSevEsReset:
+    DW      0x0000
+    DW      0x0000
+
+ALIGN   16
+
+applicationProcessorEntryPoint:
+;
+; Application Processors entry point
+;
+; GenFv generates code aligned on a 4k boundary which will jump to this
+; location.  (0xffffffe0)  This allows the Local APIC Startup IPI to be
+; used to wake up the application processors.
+;
+    jmp     EarlyApInitReal16
+
+ALIGN   8
+
+    DD      0
+
+;
+; The VTF signature
+;
+; VTF-0 means that the VTF (Volume Top File) code does not require
+; any fixups.
+;
+vtfSignature:
+    DB      'V', 'T', 'F', 0
+
+ALIGN   16
+
+resetVector:
+;
+; Reset Vector
+;
+; This is where the processor will begin execution
+;
+    cmp     dword [CS:0xFFD0], 0
+    je      EarlyBspInitReal16
+    jmp     far [CS:0xFFD0]
+
+ALIGN   16
+
+fourGigabytes:
+
-- 
2.17.1


  parent reply	other threads:[~2019-09-19 19:53 UTC|newest]

Thread overview: 106+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-19 19:52 [RFC PATCH v2 00/44] SEV-ES guest support Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 01/44] MdePkg: Create PCDs to be used in support of SEV-ES Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 02/44] OvmfPkg/MemEncryptSevLib: Add an SEV-ES guest indicator function Lendacky, Thomas
2019-09-24 11:53   ` [edk2-devel] " Laszlo Ersek
2019-09-19 19:52 ` [RFC PATCH v2 03/44] OvmfPkg: Add support to perform SEV-ES initialization Lendacky, Thomas
2019-09-24 11:59   ` [edk2-devel] " Laszlo Ersek
2019-09-24 14:43     ` Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 04/44] OvmfPkg/ResetVector: Add support for a 32-bit SEV check Lendacky, Thomas
2019-09-24 13:42   ` [edk2-devel] " Laszlo Ersek
2019-09-24 13:50     ` Laszlo Ersek
2019-09-24 18:57     ` Lendacky, Thomas
2019-09-25 14:45       ` Laszlo Ersek
2019-09-30 19:29       ` Laszlo Ersek
2019-09-30 19:55         ` Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 05/44] MdePkg: Add the MSR definition for the GHCB register Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 06/44] OvmfPkg: Create a GHCB page for use during Sec phase Lendacky, Thomas
2019-09-25  8:09   ` [edk2-devel] " Laszlo Ersek
2019-09-25 17:36     ` Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 07/44] OvmfPkg/PlatformPei: Reserve GHCB-related areas if S3 is supported Lendacky, Thomas
2019-09-25  8:27   ` [edk2-devel] " Laszlo Ersek
2019-09-25 17:52     ` Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 08/44] OvmfPkg: Create GHCB pages for use during Pei and Dxe phase Lendacky, Thomas
2019-09-26  8:00   ` [edk2-devel] " Laszlo Ersek
2019-09-26 14:00     ` Lendacky, Thomas
2019-09-30 18:52       ` Laszlo Ersek
2019-09-30 19:49         ` Lendacky, Thomas
2019-09-30 19:12       ` Laszlo Ersek
2019-09-30 19:51         ` Lendacky, Thomas
2019-10-02 10:23   ` Laszlo Ersek
2019-10-02 14:43     ` Lendacky, Thomas
2019-10-02 15:55       ` Laszlo Ersek
2019-09-19 19:52 ` [RFC PATCH v2 09/44] MdeModulePkg/DxeIplPeim: Support GHCB pages when creating page tables Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 10/44] OvmfPkg: A per-CPU variable area for #VC usage Lendacky, Thomas
2019-09-26  8:17   ` [edk2-devel] " Laszlo Ersek
2019-09-26 14:46     ` Lendacky, Thomas
2019-09-30 19:15       ` Laszlo Ersek
2019-09-30 19:52         ` Lendacky, Thomas
2019-10-02 11:51   ` Laszlo Ersek
2019-10-02 16:06     ` Lendacky, Thomas
2019-10-03  9:06       ` Laszlo Ersek
2019-09-19 19:52 ` [RFC PATCH v2 11/44] OvmfPkg/PlatformPei: Move early GDT into ram when SEV-ES is enabled Lendacky, Thomas
2019-10-02 12:05   ` [edk2-devel] " Laszlo Ersek
2019-10-02 16:10     ` Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 12/44] MdePkg: Add a structure definition for the GHCB Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 13/44] MdePkg/BaseLib: Add support for the VMGEXIT instruction Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 14/44] UefiCpuPkg: Implement library support for VMGEXIT Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 15/44] UefiCpuPkg/CpuExceptionHandler: Add base support for the #VC exception Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 16/44] OvmfPkg/MemEncryptSevLib: Make MemEncryptSevLib available during SEC Lendacky, Thomas
2019-10-02 12:24   ` [edk2-devel] " Laszlo Ersek
2019-10-02 12:30     ` Laszlo Ersek
2019-10-02 16:16       ` Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 17/44] UefiCpuPkg/CpuExceptionHandler: Add #VC exception handling for Sec phase Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 18/44] OvmfPkg/Sec: Enable cache early to speed up booting Lendacky, Thomas
2019-10-02 12:31   ` [edk2-devel] " Laszlo Ersek
2019-09-19 19:52 ` [RFC PATCH v2 19/44] UefiCpuPkg/CpuExceptionHandler: Add support for IOIO_PROT NAE events Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 20/44] UefiCpuPkg/CpuExceptionHandler: Support string IO " Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 21/44] MdePkg: Add support for the XGETBV instruction Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 22/44] UefiCpuPkg/CpuExceptionHandler: Add support for CPUID NAE events Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 23/44] UefiCpuPkg/CpuExceptionHandler: Add support for MSR_PROT " Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 24/44] UefiCpuPkg/CpuExceptionHandler: Add support for NPF NAE events (MMIO) Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 25/44] UefiCpuPkg/CpuExceptionHandler: Add support for WBINVD NAE events Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 26/44] UefiCpuPkg/CpuExceptionHandler: Add support for RDTSC " Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 27/44] UefiCpuPkg/CpuExceptionHandler: Add support for RDPMC " Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 28/44] UefiCpuPkg/CpuExceptionHandler: Add support for INVD " Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 29/44] UefiCpuPkg/CpuExceptionHandler: Add support for VMMCALL " Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 30/44] UefiCpuPkg/CpuExceptionHandler: Add support for RDTSCP " Lendacky, Thomas
2019-09-19 19:52 ` [RFC PATCH v2 31/44] UefiCpuPkg/CpuExceptionHandler: Add support for MONITOR/MONITORX " Lendacky, Thomas
2019-09-19 19:53 ` [RFC PATCH v2 32/44] UefiCpuPkg/CpuExceptionHandler: Add support for MWAIT/MWAITX " Lendacky, Thomas
2019-09-19 19:53 ` [RFC PATCH v2 33/44] UefiCpuPkg/CpuExceptionHandler: Add support for DR7 Read/Write " Lendacky, Thomas
2019-09-19 19:53 ` [RFC PATCH v2 34/44] UefiCpuPkg/MpInitLib: Update CPU MP data with a flag to indicate if SEV-ES is active Lendacky, Thomas
2019-09-19 19:53 ` [RFC PATCH v2 36/44] UefiCpuPkg: Add a 16-bit protected mode code segment descriptor Lendacky, Thomas
2019-09-19 19:53 ` [RFC PATCH v2 35/44] MdeModulePkg: Reserve " Lendacky, Thomas
2019-09-19 19:53 ` Lendacky, Thomas [this message]
2019-10-02 14:54   ` [edk2-devel] [RFC PATCH v2 37/44] OvmfPkg: Add support for SEV-ES AP reset vector re-directing Laszlo Ersek
2019-10-02 17:33     ` Lendacky, Thomas
2019-10-03  9:09       ` Laszlo Ersek
2019-09-19 19:53 ` [RFC PATCH v2 38/44] UefiCpuPkg: Allow AP booting under SEV-ES Lendacky, Thomas
2019-10-02 15:15   ` [edk2-devel] " Laszlo Ersek
2019-10-02 15:26     ` Laszlo Ersek
2019-10-02 18:07       ` Lendacky, Thomas
2019-10-03 10:12         ` Laszlo Ersek
2019-10-03 10:32           ` Laszlo Ersek
2019-10-03 15:12             ` Lendacky, Thomas
2019-10-10 23:17               ` Lendacky, Thomas
2019-10-10 23:56                 ` Andrew Fish
2019-10-11  8:56                 ` Laszlo Ersek
2019-10-12  6:42                   ` Andrew Fish
2019-10-12  7:46                     ` Liming Gao
2019-10-12 18:50                       ` Andrew Fish
2019-10-14 13:11                     ` Laszlo Ersek
2019-10-14 19:11                       ` Andrew Fish
2019-10-02 17:58     ` Lendacky, Thomas
2019-10-03  9:21       ` Laszlo Ersek
2019-09-19 19:53 ` [RFC PATCH v2 40/44] MdePkg: Add a finalization function to the CPU protocol Lendacky, Thomas
2019-09-20 13:16 ` [RFC PATCH v2 39/44] OvmfPkg: Move the GHCB allocations into reserved memory Lendacky, Thomas
2019-10-02 14:38   ` [edk2-devel] " Laszlo Ersek
2019-09-20 13:16 ` [RFC PATCH v2 42/44] UefiCpuPkg/MpInitLib: Prepare SEV-ES guest APs for OS use Lendacky, Thomas
2019-12-12  8:24   ` Ni, Ray
2019-12-13 16:35     ` Lendacky, Thomas
2019-09-20 13:16 ` [RFC PATCH v2 41/44] UefiCpuPkg/MpInitLib: Add MP finalization interface to MpInitLib Lendacky, Thomas
2019-09-20 13:16 ` [RFC PATCH v2 43/44] UefiCpuPkg/CpuDxe: Provide an DXE MP finalization routine to support SEV-ES Lendacky, Thomas
2019-09-20 13:16 ` [RFC PATCH v2 44/44] MdeModulePkg/DxeCore: Perform the CPU protocol finalization support Lendacky, Thomas
2019-09-20 19:24 ` [RFC PATCH v2 00/44] SEV-ES guest support Lendacky, Thomas
2019-09-24  1:55   ` [edk2-devel] " Dong, Eric
2019-09-24 14:31     ` Lendacky, Thomas
2019-09-25 22:31       ` Ni, Ray

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-list from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=61fd6897ca552edbb39ab2f2ee0cce0b505ee71c.1568922729.git.thomas.lendacky@amd.com \
    --to=devel@edk2.groups.io \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox