* Re: [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas
[not found] <20200916073539.3552-1-rppt@kernel.org>
@ 2020-09-17 13:27 ` Qian Cai
2020-09-18 18:25 ` Qian Cai
0 siblings, 1 reply; 3+ messages in thread
From: Qian Cai @ 2020-09-17 13:27 UTC (permalink / raw)
To: Mike Rapoport, Andrew Morton
Cc: Alexander Viro, Andy Lutomirski, Arnd Bergmann, Borislav Petkov,
Catalin Marinas, Christopher Lameter, Dan Williams, Dave Hansen,
David Hildenbrand, Elena Reshetova, H. Peter Anvin, Idan Yaniv,
Ingo Molnar, James Bottomley, Kirill A. Shutemov, Matthew Wilcox,
Mark Rutland, Mike Rapoport, Michael Kerrisk, Palmer Dabbelt,
Paul Walmsley, Peter Zijlstra, Thomas Gleixner, Tycho Andersen,
Will Deacon, linux-api, linux-arch, linux-arm-kernel,
linux-fsdevel, linux-mm, linux-kernel, linux-nvdimm, linux-riscv,
x86, Stephen Rothwell, linux-next
On Wed, 2020-09-16 at 10:35 +0300, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
>
> Hi,
>
> This is an implementation of "secret" mappings backed by a file descriptor.
> I've dropped the boot time reservation patch for now as it is not strictly
> required for the basic usage and can be easily added later either with or
> without CMA.
On powerpc: https://gitlab.com/cailca/linux-mm/-/blob/master/powerpc.config
There is a compiling warning from the today's linux-next:
<stdin>:1532:2: warning: #warning syscall memfd_secret not implemented [-Wcpp]
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas
2020-09-17 13:27 ` [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas Qian Cai
@ 2020-09-18 18:25 ` Qian Cai
2020-09-21 8:07 ` Stephen Rothwell
0 siblings, 1 reply; 3+ messages in thread
From: Qian Cai @ 2020-09-18 18:25 UTC (permalink / raw)
To: Mike Rapoport, Andrew Morton
Cc: Alexander Viro, Andy Lutomirski, Arnd Bergmann, Borislav Petkov,
Catalin Marinas, Christopher Lameter, Dan Williams, Dave Hansen,
David Hildenbrand, Elena Reshetova, H. Peter Anvin, Idan Yaniv,
Ingo Molnar, James Bottomley, Kirill A. Shutemov, Matthew Wilcox,
Mark Rutland, Mike Rapoport, Michael Kerrisk, Palmer Dabbelt,
Paul Walmsley, Peter Zijlstra, Thomas Gleixner, Tycho Andersen,
Will Deacon, linux-api, linux-arch, linux-arm-kernel,
linux-fsdevel, linux-mm, linux-kernel, linux-nvdimm, linux-riscv,
x86, Stephen Rothwell, linux-next
On Thu, 2020-09-17 at 09:27 -0400, Qian Cai wrote:
> On Wed, 2020-09-16 at 10:35 +0300, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@linux.ibm.com>
> >
> > Hi,
> >
> > This is an implementation of "secret" mappings backed by a file descriptor.
> > I've dropped the boot time reservation patch for now as it is not strictly
> > required for the basic usage and can be easily added later either with or
> > without CMA.
>
> On powerpc: https://gitlab.com/cailca/linux-mm/-/blob/master/powerpc.config
>
> There is a compiling warning from the today's linux-next:
>
> <stdin>:1532:2: warning: #warning syscall memfd_secret not implemented [-Wcpp]
This should silence the warning:
diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh
index a18b47695f55..b7609958ee36 100755
--- a/scripts/checksyscalls.sh
+++ b/scripts/checksyscalls.sh
@@ -40,6 +40,10 @@ cat << EOF
#define __IGNORE_setrlimit /* setrlimit */
#endif
+#ifndef __ARCH_WANT_MEMFD_SECRET
+#define __IGNORE_memfd_secret
+#endif
+
/* Missing flags argument */
#define __IGNORE_renameat /* renameat2 */
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas
2020-09-18 18:25 ` Qian Cai
@ 2020-09-21 8:07 ` Stephen Rothwell
0 siblings, 0 replies; 3+ messages in thread
From: Stephen Rothwell @ 2020-09-21 8:07 UTC (permalink / raw)
To: Qian Cai
Cc: Mike Rapoport, Andrew Morton, Alexander Viro, Andy Lutomirski,
Arnd Bergmann, Borislav Petkov, Catalin Marinas,
Christopher Lameter, Dan Williams, Dave Hansen,
David Hildenbrand, Elena Reshetova, H. Peter Anvin, Idan Yaniv,
Ingo Molnar, James Bottomley, Kirill A. Shutemov, Matthew Wilcox,
Mark Rutland, Mike Rapoport, Michael Kerrisk, Palmer Dabbelt,
Paul Walmsley, Peter Zijlstra, Thomas Gleixner, Tycho Andersen,
Will Deacon, linux-api, linux-arch, linux-arm-kernel,
linux-fsdevel, linux-mm, linux-kernel, linux-nvdimm, linux-riscv,
x86, linux-next
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Hi all,
On Fri, 18 Sep 2020 14:25:15 -0400 Qian Cai <cai@redhat.com> wrote:
>
> On Thu, 2020-09-17 at 09:27 -0400, Qian Cai wrote:
> > On Wed, 2020-09-16 at 10:35 +0300, Mike Rapoport wrote:
> > > From: Mike Rapoport <rppt@linux.ibm.com>
> > >
> > > This is an implementation of "secret" mappings backed by a file descriptor.
> > > I've dropped the boot time reservation patch for now as it is not strictly
> > > required for the basic usage and can be easily added later either with or
> > > without CMA.
> >
> > On powerpc: https://gitlab.com/cailca/linux-mm/-/blob/master/powerpc.config
> >
> > There is a compiling warning from the today's linux-next:
> >
> > <stdin>:1532:2: warning: #warning syscall memfd_secret not implemented [-Wcpp]
>
> This should silence the warning:
>
> diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh
> index a18b47695f55..b7609958ee36 100755
> --- a/scripts/checksyscalls.sh
> +++ b/scripts/checksyscalls.sh
> @@ -40,6 +40,10 @@ cat << EOF
> #define __IGNORE_setrlimit /* setrlimit */
> #endif
>
> +#ifndef __ARCH_WANT_MEMFD_SECRET
> +#define __IGNORE_memfd_secret
> +#endif
> +
> /* Missing flags argument */
> #define __IGNORE_renameat /* renameat2 */
>
Added to linux-next today.
--
Cheers,
Stephen Rothwell
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-09-17 13:27 ` [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas Qian Cai
2020-09-18 18:25 ` Qian Cai
2020-09-21 8:07 ` Stephen Rothwell
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