linux-kernel - Re: [PATCH v29 14/20] x86/sgx: ptrace() support for the SGX driver

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Date:   Wed, 6 May 2020 14:50:48 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-sgx@...r.kernel.org, akpm@...ux-foundation.org,
        dave.hansen@...el.com, nhorman@...hat.com, npmccallum@...hat.com,
        haitao.huang@...el.com, andriy.shevchenko@...ux.intel.com,
        tglx@...utronix.de, kai.svahn@...el.com, bp@...en8.de,
        josh@...htriplett.org, luto@...nel.org, kai.huang@...el.com,
        rientjes@...gle.com, cedric.xing@...el.com, puiterwijk@...hat.com
Subject: Re: [PATCH v29 14/20] x86/sgx: ptrace() support for the SGX driver

On Wed, Apr 22, 2020 at 12:53:10AM +0300, Jarkko Sakkinen wrote:
> Add VMA callbacks for ptrace() that can be used with debug enclaves.
> With debug enclaves data can be read and write the memory word at a time
> by using ENCLS(EDBGRD) and ENCLS(EDBGWR) leaf instructions.
> 
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> ---
>  arch/x86/kernel/cpu/sgx/encl.c | 88 ++++++++++++++++++++++++++++++++++
>  1 file changed, 88 insertions(+)
> 
> diff --git a/arch/x86/kernel/cpu/sgx/encl.c b/arch/x86/kernel/cpu/sgx/encl.c
> index fe7dbca40bb4..0c5ea2968868 100644
> --- a/arch/x86/kernel/cpu/sgx/encl.c
> +++ b/arch/x86/kernel/cpu/sgx/encl.c
> @@ -326,6 +326,7 @@ int sgx_encl_may_map(struct sgx_encl *encl, unsigned long start,
>  	return 0;
>  }
>  
> +

Unnecessary whitespace change.

>  static int sgx_vma_mprotect(struct vm_area_struct *vma, unsigned long start,
>  			    unsigned long end, unsigned long prot)
>  {