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From: Lai Jiangshan <jiangshanlai@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, Lai Jiangshan <laijs@linux.alibaba.com>,
	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>,
	Ben Widawsky <ben.widawsky@intel.com>,
	Dave Jiang <dave.jiang@intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Kees Cook <keescook@chromium.org>
Subject: [PATCH V5 11/50] x86: Mark __native_read_cr3() & native_write_cr3() as __always_inline
Date: Wed, 10 Nov 2021 19:56:57 +0800	[thread overview]
Message-ID: <20211110115736.3776-12-jiangshanlai@gmail.com> (raw)
In-Reply-To: <20211110115736.3776-1-jiangshanlai@gmail.com>

From: Lai Jiangshan <laijs@linux.alibaba.com>

We need __native_read_cr3() & native_write_cr3() to be ensured noinstr.

It is prepared for later patches which implement entry code in C file.
Some of the code needs to handle KPTI and has to read/write CR3.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
 arch/x86/include/asm/special_insns.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h
index 68c257a3de0d..fbb057ba60e6 100644
--- a/arch/x86/include/asm/special_insns.h
+++ b/arch/x86/include/asm/special_insns.h
@@ -42,14 +42,14 @@ static __always_inline void native_write_cr2(unsigned long val)
 	asm volatile("mov %0,%%cr2": : "r" (val) : "memory");
 }
 
-static inline unsigned long __native_read_cr3(void)
+static __always_inline unsigned long __native_read_cr3(void)
 {
 	unsigned long val;
 	asm volatile("mov %%cr3,%0\n\t" : "=r" (val) : __FORCE_ORDER);
 	return val;
 }
 
-static inline void native_write_cr3(unsigned long val)
+static __always_inline void native_write_cr3(unsigned long val)
 {
 	asm volatile("mov %0,%%cr3": : "r" (val) : "memory");
 }
-- 
2.19.1.6.gb485710b


  parent reply	other threads:[~2021-11-10 11:58 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 ` Lai Jiangshan [this message]
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 ` [PATCH V5 39/50] x86/debug, mce: Use C entry code Lai Jiangshan
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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