From: Lai Jiangshan <jiangshanlai@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, Lai Jiangshan <laijs@linux.alibaba.com>,
Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Tony Luck <tony.luck@intel.com>,
Juergen Gross <jgross@suse.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Joerg Roedel <jroedel@suse.de>,
linux-edac@vger.kernel.org
Subject: [PATCH V5 39/50] x86/debug, mce: Use C entry code
Date: Wed, 10 Nov 2021 19:57:25 +0800 [thread overview]
Message-ID: <20211110115736.3776-40-jiangshanlai@gmail.com> (raw)
In-Reply-To: <20211110115736.3776-1-jiangshanlai@gmail.com>
From: Lai Jiangshan <laijs@linux.alibaba.com>
Use DEFINE_IDTENTRY_IST_ETNRY to emit C entry function and use the function
directly in entry_64.S.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
arch/x86/entry/entry_64.S | 10 +---------
arch/x86/include/asm/idtentry.h | 1 +
arch/x86/kernel/cpu/mce/Makefile | 3 +++
3 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index b6bcf7fcad34..61e89fd5ad8a 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -465,16 +465,8 @@ SYM_CODE_START(\asmsym)
testb $3, CS(%rsp)
jnz .Lfrom_usermode_switch_stack_\@
- /* paranoid_entry returns GS information for paranoid_exit in EBX. */
- call paranoid_entry
-
- UNWIND_HINT_REGS
-
movq %rsp, %rdi /* pt_regs pointer */
-
- call \cfunc
-
- call paranoid_exit
+ call ist_\cfunc
jmp restore_regs_and_return_to_kernel
/* Switch to the regular task stack and use the noist entry point */
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index 0f615943a460..d0fd32288442 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -358,6 +358,7 @@ __visible __entry_text void ist_##func(struct pt_regs *regs) \
* Maps to DEFINE_IDTENTRY_RAW
*/
#define DEFINE_IDTENTRY_IST(func) \
+ DEFINE_IDTENTRY_IST_ETNRY(func) \
DEFINE_IDTENTRY_RAW(func)
/**
diff --git a/arch/x86/kernel/cpu/mce/Makefile b/arch/x86/kernel/cpu/mce/Makefile
index 015856abdbb1..555963416ec3 100644
--- a/arch/x86/kernel/cpu/mce/Makefile
+++ b/arch/x86/kernel/cpu/mce/Makefile
@@ -1,4 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
+
+CFLAGS_core.o += -fno-stack-protector
+
obj-y = core.o severity.o genpool.o
obj-$(CONFIG_X86_ANCIENT_MCE) += winchip.o p5.o
--
2.19.1.6.gb485710b
next prev parent reply other threads:[~2021-11-10 12:01 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-10 11:56 [PATCH V5 00/50] x86/entry/64: Convert a bunch of ASM entry code into C code Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 01/50] x86/entry: Add fence for kernel entry swapgs in paranoid_entry() Lai Jiangshan
2021-11-18 15:54 ` Peter Zijlstra
2021-11-18 17:27 ` Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 02/50] x86/entry: Use the correct fence macro after swapgs in kernel CR3 Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 03/50] x86/traps: Remove stack-protector from traps.c Lai Jiangshan
2021-11-18 19:55 ` Peter Zijlstra
2021-11-19 1:38 ` Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 04/50] x86/xen: Add xenpv_restore_regs_and_return_to_usermode() Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 05/50] x86/entry: Use swapgs and native_iret directly in swapgs_restore_regs_and_return_to_usermode Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 06/50] compiler_types.h: Add __noinstr_section() for noinstr Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 07/50] x86/entry: Introduce __entry_text for entry code written in C Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 08/50] x86/entry: Move PTI_USER_* to arch/x86/include/asm/processor-flags.h Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 09/50] x86: Remove unused kernel_to_user_p4dp() and user_to_kernel_p4dp() Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 10/50] x86: Replace PTI_PGTABLE_SWITCH_BIT with PTI_USER_PGTABLE_BIT Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 11/50] x86: Mark __native_read_cr3() & native_write_cr3() as __always_inline Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 12/50] x86/traps: Move the declaration of native_irq_return_iret into proto.h Lai Jiangshan
2021-11-10 11:56 ` [PATCH V5 13/50] x86/entry: Add arch/x86/entry/entry64.c for C entry code Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 14/50] x86/entry: Expose the address of .Lgs_change to entry64.c Lai Jiangshan
2021-11-18 20:13 ` Peter Zijlstra
2021-11-10 11:57 ` [PATCH V5 15/50] x86/entry: Add C verion of SWITCH_TO_KERNEL_CR3 as switch_to_kernel_cr3() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 16/50] x86/traps: Add fence_swapgs_{user,kernel}_entry() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 17/50] x86/entry: Add C user_entry_swapgs_and_fence() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 18/50] x86/traps: Move pt_regs only in fixup_bad_iret() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 19/50] x86/entry: Switch the stack after error_entry() returns Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 20/50] x86/entry: move PUSH_AND_CLEAR_REGS out of error_entry Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 21/50] x86/entry: Move cld to the start of idtentry Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 22/50] x86/entry: Don't call error_entry for XENPV Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 23/50] x86/entry: Convert SWAPGS to swapgs in error_entry() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 24/50] x86/entry: Implement the whole error_entry() as C code Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 25/50] x86/entry: Use idtentry macro for entry_INT80_compat Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 26/50] x86/entry: Convert SWAPGS to swapgs in entry_SYSENTER_compat() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 27/50] x86: Remove the definition of SWAPGS Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 28/50] x86/entry: Make paranoid_exit() callable Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 29/50] x86/entry: Call paranoid_exit() in asm_exc_nmi() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 30/50] x86/entry: move PUSH_AND_CLEAR_REGS out of paranoid_entry Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 31/50] x86/entry: Add the C version ist_switch_to_kernel_cr3() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 32/50] x86/entry: Skip CR3 write when the saved CR3 is kernel CR3 in RESTORE_CR3 Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 33/50] x86/entry: Add the C version ist_restore_cr3() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 34/50] x86/entry: Add the C version get_percpu_base() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 35/50] x86/entry: Add the C version ist_switch_to_kernel_gsbase() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 36/50] x86/entry: Implement the C version ist_paranoid_entry() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 37/50] x86/entry: Implement the C version ist_paranoid_exit() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 38/50] x86/entry: Add a C macro to define the function body for IST in .entry.text Lai Jiangshan
2021-11-10 11:57 ` Lai Jiangshan [this message]
2021-11-10 11:57 ` [PATCH V5 40/50] x86/idtentry.h: Move the definitions *IDTENTRY_{MCE|DEBUG}* up Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 41/50] x86/nmi: Use DEFINE_IDTENTRY_NMI for nmi Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 42/50] x86/nmi: Use C entry code Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 43/50] x86/entry: Add a C macro to define the function body for IST in .entry.text with an error code Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 44/50] x86/doublefault: Use C entry code Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 45/50] x86/sev: Add and use ist_vc_switch_off_ist() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 46/50] x86/sev: Use C entry code Lai Jiangshan
2021-11-18 9:31 ` Liam Merwick
2021-11-18 11:04 ` Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 47/50] x86/entry: Remove ASM function paranoid_entry() and paranoid_exit() Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 48/50] x86/entry: Remove the unused ASM macros Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 49/50] x86/entry: Remove save_ret from PUSH_AND_CLEAR_REGS Lai Jiangshan
2021-11-10 11:57 ` [PATCH V5 50/50] x86/syscall/64: Move the checking for sysret to C code Lai Jiangshan
2021-11-18 8:54 ` [PATCH V5 00/50] x86/entry/64: Convert a bunch of ASM entry code into " Lai Jiangshan
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