All of lore.kernel.org
 help / color / mirror / Atom feed
From: Ira Weiny <ira.weiny@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Andy Lutomirski <luto@kernel.org>,
	Fenghua Yu <fenghua.yu@intel.com>,
	x86@kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH RFC V3 2/9] x86/fpu: Refactor arch_set_user_pkey_access() for PKS support
Date: Fri, 16 Oct 2020 20:32:03 -0700	[thread overview]
Message-ID: <20201017033202.GV2046448@iweiny-DESK2.sc.intel.com> (raw)
In-Reply-To: <20201016105743.GK2611@hirez.programming.kicks-ass.net>

On Fri, Oct 16, 2020 at 12:57:43PM +0200, Peter Zijlstra wrote:
> On Fri, Oct 09, 2020 at 12:42:51PM -0700, ira.weiny@intel.com wrote:
> > From: Fenghua Yu <fenghua.yu@intel.com>
> > 
> > Define a helper, update_pkey_val(), which will be used to support both
> > Protection Key User (PKU) and the new Protection Key for Supervisor
> > (PKS) in subsequent patches.
> > 
> > Co-developed-by: Ira Weiny <ira.weiny@intel.com>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> > Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
> > ---
> >  arch/x86/include/asm/pkeys.h |  2 ++
> >  arch/x86/kernel/fpu/xstate.c | 22 ++++------------------
> >  arch/x86/mm/pkeys.c          | 21 +++++++++++++++++++++
> >  3 files changed, 27 insertions(+), 18 deletions(-)
> 
> This is not from Fenghua.
> 
>   https://lkml.kernel.org/r/20200717085442.GX10769@hirez.programming.kicks-ass.net
> 
> This is your patch based on the code I wrote.

Ok, I apologize.  Yes the code below was all yours.

Is it ok to add?

Co-developed-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>

?

Thanks,
Ira

> 
> > diff --git a/arch/x86/mm/pkeys.c b/arch/x86/mm/pkeys.c
> > index f5efb4007e74..3cf8f775f36d 100644
> > --- a/arch/x86/mm/pkeys.c
> > +++ b/arch/x86/mm/pkeys.c
> > @@ -208,3 +208,24 @@ static __init int setup_init_pkru(char *opt)
> >  	return 1;
> >  }
> >  __setup("init_pkru=", setup_init_pkru);
> > +
> > +/*
> > + * Update the pk_reg value and return it.
> > + *
> > + * Kernel users use the same flags as user space:
> > + *     PKEY_DISABLE_ACCESS
> > + *     PKEY_DISABLE_WRITE
> > + */
> > +u32 update_pkey_val(u32 pk_reg, int pkey, unsigned int flags)
> > +{
> > +	int pkey_shift = pkey * PKR_BITS_PER_PKEY;
> > +
> > +	pk_reg &= ~(((1 << PKR_BITS_PER_PKEY) - 1) << pkey_shift);
> > +
> > +	if (flags & PKEY_DISABLE_ACCESS)
> > +		pk_reg |= PKR_AD_BIT << pkey_shift;
> > +	if (flags & PKEY_DISABLE_WRITE)
> > +		pk_reg |= PKR_WD_BIT << pkey_shift;
> > +
> > +	return pk_reg;
> > +}
> > -- 
> > 2.28.0.rc0.12.gb6a658bd00c9
> > 
_______________________________________________
Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org
To unsubscribe send an email to linux-nvdimm-leave@lists.01.org

WARNING: multiple messages have this Message-ID (diff)
From: Ira Weiny <ira.weiny@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Andy Lutomirski <luto@kernel.org>,
	Fenghua Yu <fenghua.yu@intel.com>,
	x86@kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH RFC V3 2/9] x86/fpu: Refactor arch_set_user_pkey_access() for PKS support
Date: Fri, 16 Oct 2020 20:32:03 -0700	[thread overview]
Message-ID: <20201017033202.GV2046448@iweiny-DESK2.sc.intel.com> (raw)
In-Reply-To: <20201016105743.GK2611@hirez.programming.kicks-ass.net>

On Fri, Oct 16, 2020 at 12:57:43PM +0200, Peter Zijlstra wrote:
> On Fri, Oct 09, 2020 at 12:42:51PM -0700, ira.weiny@intel.com wrote:
> > From: Fenghua Yu <fenghua.yu@intel.com>
> > 
> > Define a helper, update_pkey_val(), which will be used to support both
> > Protection Key User (PKU) and the new Protection Key for Supervisor
> > (PKS) in subsequent patches.
> > 
> > Co-developed-by: Ira Weiny <ira.weiny@intel.com>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> > Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
> > ---
> >  arch/x86/include/asm/pkeys.h |  2 ++
> >  arch/x86/kernel/fpu/xstate.c | 22 ++++------------------
> >  arch/x86/mm/pkeys.c          | 21 +++++++++++++++++++++
> >  3 files changed, 27 insertions(+), 18 deletions(-)
> 
> This is not from Fenghua.
> 
>   https://lkml.kernel.org/r/20200717085442.GX10769@hirez.programming.kicks-ass.net
> 
> This is your patch based on the code I wrote.

Ok, I apologize.  Yes the code below was all yours.

Is it ok to add?

Co-developed-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>

?

Thanks,
Ira

> 
> > diff --git a/arch/x86/mm/pkeys.c b/arch/x86/mm/pkeys.c
> > index f5efb4007e74..3cf8f775f36d 100644
> > --- a/arch/x86/mm/pkeys.c
> > +++ b/arch/x86/mm/pkeys.c
> > @@ -208,3 +208,24 @@ static __init int setup_init_pkru(char *opt)
> >  	return 1;
> >  }
> >  __setup("init_pkru=", setup_init_pkru);
> > +
> > +/*
> > + * Update the pk_reg value and return it.
> > + *
> > + * Kernel users use the same flags as user space:
> > + *     PKEY_DISABLE_ACCESS
> > + *     PKEY_DISABLE_WRITE
> > + */
> > +u32 update_pkey_val(u32 pk_reg, int pkey, unsigned int flags)
> > +{
> > +	int pkey_shift = pkey * PKR_BITS_PER_PKEY;
> > +
> > +	pk_reg &= ~(((1 << PKR_BITS_PER_PKEY) - 1) << pkey_shift);
> > +
> > +	if (flags & PKEY_DISABLE_ACCESS)
> > +		pk_reg |= PKR_AD_BIT << pkey_shift;
> > +	if (flags & PKEY_DISABLE_WRITE)
> > +		pk_reg |= PKR_WD_BIT << pkey_shift;
> > +
> > +	return pk_reg;
> > +}
> > -- 
> > 2.28.0.rc0.12.gb6a658bd00c9
> > 

  reply	other threads:[~2020-10-17  3:32 UTC|newest]

Thread overview: 94+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-09 19:42 [PATCH RFC V3 0/9] PKS: Add Protection Keys Supervisor (PKS) support RFC v3 ira.weiny
2020-10-09 19:42 ` ira.weiny
2020-10-09 19:42 ` [PATCH RFC V3 1/9] x86/pkeys: Create pkeys_common.h ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 17:46   ` Dave Hansen
2020-10-13 17:46     ` Dave Hansen
2020-10-13 19:44     ` Ira Weiny
2020-10-13 19:44       ` Ira Weiny
2020-10-09 19:42 ` [PATCH RFC V3 2/9] x86/fpu: Refactor arch_set_user_pkey_access() for PKS support ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 17:50   ` Dave Hansen
2020-10-13 17:50     ` Dave Hansen
2020-10-13 23:56     ` Ira Weiny
2020-10-13 23:56       ` Ira Weiny
2020-10-16 10:57   ` Peter Zijlstra
2020-10-16 10:57     ` Peter Zijlstra
2020-10-17  3:32     ` Ira Weiny [this message]
2020-10-17  3:32       ` Ira Weiny
2020-10-19  9:35       ` Peter Zijlstra
2020-10-19  9:35         ` Peter Zijlstra
2020-10-09 19:42 ` [PATCH RFC V3 3/9] x86/pks: Enable Protection Keys Supervisor (PKS) ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 18:23   ` Dave Hansen
2020-10-13 18:23     ` Dave Hansen
2020-10-14  2:08     ` Ira Weiny
2020-10-14  2:08       ` Ira Weiny
2020-10-09 19:42 ` [PATCH RFC V3 4/9] x86/pks: Preserve the PKRS MSR on context switch ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 18:31   ` Dave Hansen
2020-10-13 18:31     ` Dave Hansen
2020-10-14 22:36     ` Ira Weiny
2020-10-14 22:36       ` Ira Weiny
2020-10-16 11:12     ` Peter Zijlstra
2020-10-16 11:12       ` Peter Zijlstra
2020-10-17  5:14       ` Ira Weiny
2020-10-17  5:14         ` Ira Weiny
2020-10-19  9:37         ` Peter Zijlstra
2020-10-19  9:37           ` Peter Zijlstra
2020-10-19 18:48           ` Ira Weiny
2020-10-19 18:48             ` Ira Weiny
2020-10-16 11:06   ` Peter Zijlstra
2020-10-16 11:06     ` Peter Zijlstra
2020-10-17  5:37     ` Ira Weiny
2020-10-17  5:37       ` Ira Weiny
2020-10-09 19:42 ` [PATCH RFC V3 5/9] x86/pks: Add PKS kernel API ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 18:43   ` Dave Hansen
2020-10-13 18:43     ` Dave Hansen
2020-10-15  1:08     ` Ira Weiny
2020-10-15  1:08       ` Ira Weiny
2020-10-16 11:07   ` Peter Zijlstra
2020-10-16 11:07     ` Peter Zijlstra
2020-10-17  5:42     ` Ira Weiny
2020-10-17  5:42       ` Ira Weiny
2020-10-09 19:42 ` [PATCH RFC V3 6/9] x86/entry: Pass irqentry_state_t by reference ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-16 11:45   ` Peter Zijlstra
2020-10-16 11:45     ` Peter Zijlstra
2020-10-16 12:55     ` Thomas Gleixner
2020-10-16 12:55       ` Thomas Gleixner
2020-10-19  5:37       ` Ira Weiny
2020-10-19  5:37         ` Ira Weiny
2020-10-19  9:32         ` Thomas Gleixner
2020-10-19  9:32           ` Thomas Gleixner
2020-10-19 20:26           ` Ira Weiny
2020-10-19 20:26             ` Ira Weiny
2020-10-19 21:12             ` Thomas Gleixner
2020-10-19 21:12               ` Thomas Gleixner
2020-10-20 14:10               ` Ira Weiny
2020-10-20 14:10                 ` Ira Weiny
2020-10-09 19:42 ` [PATCH RFC V3 7/9] x86/entry: Preserve PKRS MSR across exceptions ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 18:52   ` Dave Hansen
2020-10-13 18:52     ` Dave Hansen
2020-10-15  3:46     ` Ira Weiny
2020-10-15  3:46       ` Ira Weiny
2020-10-15  4:06       ` Dave Hansen
2020-10-15  4:06         ` Dave Hansen
2020-10-15  4:18         ` Ira Weiny
2020-10-15  4:18           ` Ira Weiny
2020-10-09 19:42 ` [PATCH RFC V3 8/9] x86/fault: Report the PKRS state on fault ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 18:56   ` Dave Hansen
2020-10-13 18:56     ` Dave Hansen
2020-10-15  4:13     ` Ira Weiny
2020-10-15  4:13       ` Ira Weiny
2020-10-09 19:42 ` [PATCH RFC V3 9/9] x86/pks: Add PKS test code ira.weiny
2020-10-09 19:42   ` ira.weiny
2020-10-13 19:02   ` Dave Hansen
2020-10-13 19:02     ` Dave Hansen
2020-10-15  4:46     ` Ira Weiny
2020-10-15  4:46       ` Ira Weiny
2020-10-09 20:18 ` [PATCH RFC V3 0/9] PKS: Add Protection Keys Supervisor (PKS) support RFC v3 Ira Weiny
2020-10-09 20:18   ` Ira Weiny

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201017033202.GV2046448@iweiny-DESK2.sc.intel.com \
    --to=ira.weiny@intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=bp@alien8.de \
    --cc=dave.hansen@linux.intel.com \
    --cc=fenghua.yu@intel.com \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-kselftest@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-nvdimm@lists.01.org \
    --cc=luto@kernel.org \
    --cc=mingo@redhat.com \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.