public inbox for devel@edk2.groups.io
 help / color / mirror / Atom feed
From: "Wu, Jiaxin" <jiaxin.wu@intel.com>
To: devel@edk2.groups.io
Cc: Eric Dong <eric.dong@intel.com>, Ray Ni <ray.ni@intel.com>,
	Zeng Star <star.zeng@intel.com>, Laszlo Ersek <lersek@redhat.com>,
	Gerd Hoffmann <kraxel@redhat.com>,
	Rahul Kumar <rahul1.kumar@intel.com>
Subject: [PATCH v8 2/6] UefiCpuPkg/PiSmmCpuDxeSmm: Replace mIsBsp by mBspApicId check
Date: Thu, 16 Feb 2023 10:46:31 +0800	[thread overview]
Message-ID: <20230216024635.9316-3-jiaxin.wu@intel.com> (raw)
In-Reply-To: <20230216024635.9316-1-jiaxin.wu@intel.com>

This patch is to replace mIsBsp by mBspApicId check.
mIsBsp becomes the local variable (IsBsp), then it can be
checked dynamically in the function. Instead, we define the
mBspApicId, which is to record the BSP ApicId used for
compare in SmmInitHandler. With this change, SmmInitHandler
can be run in parallel during SMM init.

Note:
This patch is the per-prepared work by refining the
SmmInitHandler, then, we can do the next step to
combine 2 SMIs (gcSmmInitTemplate & gcSmiHandlerTemplate)
into one (gcSmiHandlerTemplate), the new SMI handler
will call the SmmInitHandler in parallel to do the init.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Zeng Star <star.zeng@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
---
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
index 2ac655d032..6e795d1756 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
@@ -57,11 +57,10 @@ SMM_CPU_PRIVATE_DATA  *gSmmCpuPrivate = &mSmmCpuPrivateData;
 
 //
 // SMM Relocation variables
 //
 volatile BOOLEAN  *mRebased;
-volatile BOOLEAN  mIsBsp;
 
 ///
 /// Handle for the SMM CPU Protocol
 ///
 EFI_HANDLE  mSmmCpuHandle = NULL;
@@ -83,10 +82,12 @@ EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL  mSmmMemoryAttribute = {
   EdkiiSmmClearMemoryAttributes
 };
 
 EFI_CPU_INTERRUPT_HANDLER  mExternalVectorTable[EXCEPTION_VECTOR_NUMBER];
 
+UINT32            mBspApicId       = 0;
+
 //
 // SMM stack information
 //
 UINTN  mSmmStackArrayBase;
 UINTN  mSmmStackArrayEnd;
@@ -341,39 +342,42 @@ VOID
 EFIAPI
 SmmInitHandler (
   VOID
   )
 {
-  UINT32  ApicId;
-  UINTN   Index;
+  UINT32   ApicId;
+  UINTN    Index;
+  BOOLEAN  IsBsp;
 
   //
   // Update SMM IDT entries' code segment and load IDT
   //
   AsmWriteIdtr (&gcSmiIdtr);
   ApicId = GetApicId ();
 
+  IsBsp = (BOOLEAN)(mBspApicId == ApicId);
+
   ASSERT (mNumberOfCpus <= mMaxNumberOfCpus);
 
   for (Index = 0; Index < mNumberOfCpus; Index++) {
     if (ApicId == (UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId) {
       //
       // Initialize SMM specific features on the currently executing CPU
       //
       SmmCpuFeaturesInitializeProcessor (
         Index,
-        mIsBsp,
+        IsBsp,
         gSmmCpuPrivate->ProcessorInfo,
         &mCpuHotPlugData
         );
 
       if (!mSmmS3Flag) {
         //
         // Check XD and BTS features on each processor on normal boot
         //
         CheckFeatureSupported ();
-      } else if (mIsBsp) {
+      } else if (IsBsp) {
         //
         // BSP rebase is already done above.
         // Initialize private data during S3 resume
         //
         InitializeMpSyncData ();
@@ -405,11 +409,10 @@ SmmRelocateBases (
 {
   UINT8                 BakBuf[BACK_BUF_SIZE];
   SMRAM_SAVE_STATE_MAP  BakBuf2;
   SMRAM_SAVE_STATE_MAP  *CpuStatePtr;
   UINT8                 *U8Ptr;
-  UINT32                ApicId;
   UINTN                 Index;
   UINTN                 BspIndex;
 
   //
   // Make sure the reserved size is large enough for procedure SmmInitTemplate.
@@ -446,21 +449,20 @@ SmmRelocateBases (
   CopyMem (U8Ptr, gcSmmInitTemplate, gcSmmInitSize);
 
   //
   // Retrieve the local APIC ID of current processor
   //
-  ApicId = GetApicId ();
+  mBspApicId = GetApicId ();
 
   //
   // Relocate SM bases for all APs
   // This is APs' 1st SMI - rebase will be done here, and APs' default SMI handler will be overridden by gcSmmInitTemplate
   //
-  mIsBsp   = FALSE;
   BspIndex = (UINTN)-1;
   for (Index = 0; Index < mNumberOfCpus; Index++) {
     mRebased[Index] = FALSE;
-    if (ApicId != (UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId) {
+    if (mBspApicId != (UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId) {
       SendSmiIpi ((UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId);
       //
       // Wait for this AP to finish its 1st SMI
       //
       while (!mRebased[Index]) {
@@ -475,12 +477,11 @@ SmmRelocateBases (
 
   //
   // Relocate BSP's SMM base
   //
   ASSERT (BspIndex != (UINTN)-1);
-  mIsBsp = TRUE;
-  SendSmiIpi (ApicId);
+  SendSmiIpi (mBspApicId);
   //
   // Wait for the BSP to finish its 1st SMI
   //
   while (!mRebased[BspIndex]) {
   }
-- 
2.16.2.windows.1


  parent reply	other threads:[~2023-02-16  2:46 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-16  2:46 [PATCH v8 0/6] Simplify SMM Relocation Process Wu, Jiaxin
2023-02-16  2:46 ` [PATCH v8 1/6] UefiCpuPkg/PiSmmCpuDxeSmm: Fix invalid InitializeMpSyncData call Wu, Jiaxin
2023-02-16  2:46 ` Wu, Jiaxin [this message]
2023-02-16  2:46 ` [PATCH v8 3/6] UefiCpuPkg/SmmBaseHob.h: Add SMM Base HOB Data Wu, Jiaxin
2023-02-16  4:59   ` Ni, Ray
2023-02-16  5:11     ` Wu, Jiaxin
2023-02-16  2:46 ` [PATCH v8 4/6] UefiCpuPkg/PiSmmCpuDxeSmm: Consume SMM Base Hob for SmBase info Wu, Jiaxin
2023-02-16  5:01   ` Ni, Ray
2023-02-16  2:46 ` [PATCH v8 5/6] UefiCpuPkg/SmmCpuFeaturesLib: Skip SMBASE configuration Wu, Jiaxin
2023-02-16  2:46 ` [PATCH v8 6/6] OvmfPkg/SmmCpuFeaturesLib: Check SmBase relocation supported or not Wu, Jiaxin

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=20230216024635.9316-3-jiaxin.wu@intel.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