From: Borislav Petkov <bp@alien8.de>
To: Tony Luck <tony.luck@intel.com>
Cc: Youquan Song <youquan.song@intel.com>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 5/7] x86/mce: Change fault_in_kernel_space() from static to global
Date: Mon, 5 Oct 2020 18:33:09 +0200 [thread overview]
Message-ID: <20201005163309.GF21151@zn.tnic> (raw)
In-Reply-To: <20200930232611.15355-6-tony.luck@intel.com>
On Wed, Sep 30, 2020 at 04:26:09PM -0700, Tony Luck wrote:
> From: Youquan Song <youquan.song@intel.com>
>
> Machine check code needs to be able to determine if a faulting address
> is in user or kernel space. There is already a function to do this.
>
> Change from "static int" to "bool" and add declaration to <asm/traps.h>
>
> No functional change.
>
> Signed-off-by: Youquan Song <youquan.song@intel.com>
> Signed-off-by: <tony.luck@intel.com>
> ---
> arch/x86/include/asm/traps.h | 2 ++
> arch/x86/mm/fault.c | 2 +-
> 2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
> index 714b1a30e7b0..df0b7bfc1234 100644
> --- a/arch/x86/include/asm/traps.h
> +++ b/arch/x86/include/asm/traps.h
> @@ -35,6 +35,8 @@ extern int panic_on_unrecovered_nmi;
>
> void math_emulate(struct math_emu_info *);
>
> +bool fault_in_kernel_space(unsigned long address);
> +
> #ifdef CONFIG_VMAP_STACK
> void __noreturn handle_stack_overflow(const char *message,
> struct pt_regs *regs,
> diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
> index 35f1498e9832..88ae443e4e5f 100644
> --- a/arch/x86/mm/fault.c
> +++ b/arch/x86/mm/fault.c
> @@ -1081,7 +1081,7 @@ access_error(unsigned long error_code, struct vm_area_struct *vma)
> return 0;
> }
>
> -static int fault_in_kernel_space(unsigned long address)
> +bool fault_in_kernel_space(unsigned long address)
> {
> /*
> * On 64-bit systems, the vsyscall page is at an address above
> --
Yeah, merge this one into the last patch where this function is used.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2020-10-05 16:33 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200908175519.14223-1-tony.luck@intel.com>
2020-09-08 17:55 ` [PATCH 1/8] x86/mce: Stop mce_reign() from re-computing severity for every CPU Tony Luck
2020-09-14 17:21 ` Borislav Petkov
2020-09-14 17:32 ` [tip: ras/core] " tip-bot2 for Tony Luck
2020-09-08 17:55 ` [PATCH 4/8] x86/mce: Add _ASM_EXTABLE_CPY for copy user access Tony Luck
2020-09-16 9:59 ` Borislav Petkov
2020-09-08 17:55 ` [PATCH 5/8] x86/mce: Avoid tail copy when machine check terminated a copy from user Tony Luck
2020-09-16 10:53 ` Borislav Petkov
2020-09-16 19:26 ` Luck, Tony
2020-09-17 17:04 ` Borislav Petkov
2020-09-17 21:57 ` Luck, Tony
2020-09-18 7:51 ` Borislav Petkov
2020-09-08 17:55 ` [PATCH 6/8] x86/mce: Change fault_in_kernel_space() from static to global Tony Luck
2020-09-08 17:55 ` [PATCH 7/8] x86/mce: Recover from poison found while copying from user space Tony Luck
2020-09-18 16:13 ` Borislav Petkov
2020-09-08 17:55 ` [PATCH 8/8] x86/mce: Decode a kernel instruction to determine if it is copying from user Tony Luck
2020-09-21 11:31 ` Borislav Petkov
2020-09-30 23:26 ` [PATCH v2 0/7] Add machine check recovery when copying from user space Tony Luck
2020-09-30 23:26 ` [PATCH v2 1/7] x86/mce: Pass pointer to saved pt_regs to severity calculation routines Tony Luck
2020-09-30 23:26 ` [PATCH v2 2/7] x86/mce: Provide method to find out the type of exception handle Tony Luck
2020-10-05 16:35 ` Borislav Petkov
2020-09-30 23:26 ` [PATCH v2 3/7] x86/mce: Add _ASM_EXTABLE_CPY for copy user access Tony Luck
2020-10-05 16:34 ` Borislav Petkov
2020-09-30 23:26 ` [PATCH v2 4/7] x86/mce: Avoid tail copy when machine check terminated a copy from user Tony Luck
2020-09-30 23:26 ` [PATCH v2 5/7] x86/mce: Change fault_in_kernel_space() from static to global Tony Luck
2020-10-05 16:33 ` Borislav Petkov [this message]
2020-09-30 23:26 ` [PATCH v2 6/7] x86/mce: Recover from poison found while copying from user space Tony Luck
2020-10-05 16:32 ` Borislav Petkov
2020-10-05 17:47 ` Luck, Tony
2020-09-30 23:26 ` [PATCH v2 7/7] x86/mce: Decode a kernel instruction to determine if it is copying from user Tony Luck
2020-10-05 16:31 ` Borislav Petkov
2020-10-06 21:09 ` [PATCH v3 0/6] Add machine check recovery when copying from user space Tony Luck
2020-10-06 21:09 ` [PATCH v3 1/6] x86/mce: Pass pointer to saved pt_regs to severity calculation routines Tony Luck
2020-10-07 10:02 ` [tip: ras/core] " tip-bot2 for Youquan Song
2020-10-06 21:09 ` [PATCH v3 2/6] x86/mce: Provide method to find out the type of exception handle Tony Luck
2020-10-07 10:02 ` [tip: ras/core] x86/mce: Provide method to find out the type of an exception handler tip-bot2 for Tony Luck
2020-10-06 21:09 ` [PATCH v3 3/6] x86/mce: Add _ASM_EXTABLE_CPY for copy user access Tony Luck
2020-10-07 10:02 ` [tip: ras/core] " tip-bot2 for Youquan Song
2020-10-06 21:09 ` [PATCH v3 4/6] x86/mce: Avoid tail copy when machine check terminated a copy from user Tony Luck
2020-10-07 8:23 ` David Laight
2020-10-07 18:49 ` Luck, Tony
2020-10-07 21:11 ` David Laight
2020-10-07 10:02 ` [tip: ras/core] " tip-bot2 for Tony Luck
2020-10-06 21:09 ` [PATCH v3 5/6] x86/mce: Recover from poison found while copying from user space Tony Luck
2020-10-07 10:02 ` [tip: ras/core] " tip-bot2 for Tony Luck
2020-10-06 21:09 ` [PATCH v3 6/6] x86/mce: Decode a kernel instruction to determine if it is copying from user Tony Luck
2020-10-07 10:02 ` [tip: ras/core] " tip-bot2 for Tony Luck
2020-09-09 15:05 ` [RESEND PATCH 0/8] Add machine check recovery when copying from user space Tony Luck
[not found] ` <20200908175519.14223-4-tony.luck@intel.com>
2020-09-15 9:11 ` [PATCH 3/8] x86/mce: Provide method to find out the type of exception handle Borislav Petkov
2020-09-15 16:24 ` Luck, Tony
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