From: 王洋 <wangyang@bosc.ac.cn>
To: andrei.warkentin@intel.com, devel@edk2.groups.io
Cc: Yang Wang <wangyang@bosc.ac.cn>, Ran Wang <wangran@bosc.ac.cn>,
Bamvor Jian ZHANG <zhangjian@bosc.ac.cn>,
Liming Gao <gaoliming@byosoft.com.cn>,
Michael D Kinney <michael.d.kinney@intel.com>,
Sunil V L <sunilvl@ventanamicro.com>,
Zhiguang Liu <zhiguang.liu@intel.com>
Subject: [edk2-devel] [PATCH v2] MdePkg/BaseLib:Fix boot DxeCore hang on riscv platform
Date: Thu, 28 Dec 2023 10:56:32 +0800 [thread overview]
Message-ID: <63fe1c56bfa5d917d34c6ca9c5d85494385687bb.1703678382.git.wangyang@bosc.ac.cn> (raw)
For scene of
HandOffToDxeCore()->SwitchStack(DxeCoreEntryPoint)->
InternalSwitchStack()->LongJump(),Variable HobList.Raw
will be passed (from *Context1 to register a0) to
DxeMain() in parameter *HobStart.
However, meanwhile the function LongJump() overrides
register a0 with a1 (-1) due to commit (ea628f28e5 "RISCV: Fix
InternalLongJump to return correct value"), then cause hang.
Replacing calling LongJump() with new InternalSwitchStackAsm() to pass
addres data in register s0 to register a0 could fix this issue (just
like the solution in MdePkg/Library/BaseLib/AArch64/SwitchStack.S)
Signed-off-by: Yang Wang <wangyang@bosc.ac.cn>
Reviewed-by: Ran Wang <wangran@bosc.ac.cn>
Cc: Bamvor Jian ZHANG <zhangjian@bosc.ac.cn>
Cc: Andrei Warkentin <andrei.warkentin@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Sunil V L <sunilvl@ventanamicro.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
---
Change in v2:
- Remove JumpBuffer variable parameter
- Take these in the order of Context1, Context2, EntryPoint, NewStack
- Fix BaseLib.inf, add Compilation SwitchStack.S
- Drop REG_S/REG_L
MdePkg/Library/BaseLib/BaseLib.inf | 1 +
.../BaseLib/RiscV64/InternalSwitchStack.c | 31 ++++++++++++----
MdePkg/Library/BaseLib/RiscV64/SwitchStack.S | 37 +++++++++++++++++++
3 files changed, 62 insertions(+), 7 deletions(-)
create mode 100644 MdePkg/Library/BaseLib/RiscV64/SwitchStack.S
diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index 5338938944..6b46949be3 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -397,6 +397,7 @@
RiscV64/CpuPause.c
RiscV64/MemoryFence.S | GCC
RiscV64/RiscVSetJumpLongJump.S | GCC
+ RiscV64/SwitchStack.S | GCC
RiscV64/RiscVCpuBreakpoint.S | GCC
RiscV64/RiscVCpuPause.S | GCC
RiscV64/RiscVInterrupt.S | GCC
diff --git a/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c b/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c
index b78424c163..3216d241ad 100644
--- a/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c
+++ b/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c
@@ -8,6 +8,29 @@
#include "BaseLibInternals.h"
+/**
+ Transfers control to a function starting with a new stack.
+
+ This internal worker function transfers control to the function
+ specified by EntryPoint using the new stack specified by NewStack,
+ and passes in the parameters specified by Context1 and Context2.
+ Context1 and Context2 are optional and may be NULL.
+ The function EntryPoint must never return.
+
+ @param Context1 The first parameter to pass in.
+ @param Context2 The second Parameter to pass in
+ @param EntryPoint The pointer to the function to enter.
+ @param NewStack The new Location of the stack
+
+**/
+VOID
+EFIAPI
+InternalSwitchStackAsm (
+ IN VOID *Context1 OPTIONAL,
+ IN VOID *Context2 OPTIONAL,
+ IN SWITCH_STACK_ENTRY_POINT EntryPoint,
+ IN VOID *NewStack
+ );
/**
Transfers control to a function starting with a new stack.
@@ -42,12 +65,6 @@ InternalSwitchStack (
IN VA_LIST Marker
)
{
- BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
-
- JumpBuffer.RA = (UINTN)EntryPoint;
- JumpBuffer.SP = (UINTN)NewStack - sizeof (VOID *);
- JumpBuffer.S0 = (UINT64)(UINTN)Context1;
- JumpBuffer.S1 = (UINT64)(UINTN)Context2;
- LongJump (&JumpBuffer, (UINTN)-1);
+ InternalSwitchStackAsm (Context1, Context2, EntryPoint, (VOID *)((UINTN)NewStack - sizeof (VOID *)));
ASSERT (FALSE);
}
diff --git a/MdePkg/Library/BaseLib/RiscV64/SwitchStack.S b/MdePkg/Library/BaseLib/RiscV64/SwitchStack.S
new file mode 100644
index 0000000000..db535c1aab
--- /dev/null
+++ b/MdePkg/Library/BaseLib/RiscV64/SwitchStack.S
@@ -0,0 +1,37 @@
+//------------------------------------------------------------------------------
+//
+// InternalSwitchStackAsm for RISC-V
+//
+// Copyright (c) 2023, Bosc Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+//------------------------------------------------------------------------------
+.align 3
+
+#/**
+#
+# This allows the caller to switch the stack and goes to the new entry point
+#
+# @param Context Parameter to pass in
+# @param Context2 Parameter2 to pass in
+# @param EntryPoint The pointer to the location to enter
+# @param NewStack New Location of the stack
+#
+# @return Nothing. Goes to the Entry Point passing in the new parameters
+#
+#**/
+#VOID
+#EFIAPI
+#InternalSwitchStackAsm (
+# VOID *Context,
+# VOID *Context2,
+# SWITCH_STACK_ENTRY_POINT EntryPoint,
+# VOID *NewStack
+# );
+#
+ .globl InternalSwitchStackAsm
+InternalSwitchStackAsm:
+ mv ra, a2
+ mv sp, a3
+ ret
--
2.25.1
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next reply other threads:[~2023-12-28 2:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-28 2:56 王洋 [this message]
2024-01-05 15:47 ` [edk2-devel] [PATCH v2] MdePkg/BaseLib:Fix boot DxeCore hang on riscv platform Andrei Warkentin
2024-01-11 15:21 ` Sunil V L
2024-01-15 2:08 ` WangYang
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