LKML Archive on lore.kernel.org help / color / mirror / Atom feed
From: Michal Suchanek <msuchanek@suse.de> To: linuxppc-dev@lists.ozlabs.org Cc: "Benjamin Herrenschmidt" <benh@kernel.crashing.org>, "Paul Mackerras" <paulus@samba.org>, "Michael Ellerman" <mpe@ellerman.id.au>, "Peter Zijlstra" <peterz@infradead.org>, "Michal Suchanek" <msuchanek@suse.de>, "Kate Stewart" <kstewart@linuxfoundation.org>, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "Philippe Ombredanne" <pombredanne@nexb.com>, "Nicholas Piggin" <npiggin@gmail.com>, "Tobin C. Harding" <me@tobin.cc>, "Mahesh Salgaonkar" <mahesh@linux.vnet.ibm.com>, "David Gibson" <david@gibson.dropbear.id.au>, "Al Viro" <viro@zeniv.linux.org.uk>, "Michael Neuling" <mikey@neuling.org>, "Oliver O'Halloran" <oohall@gmail.com>, "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>, "Madhavan Srinivasan" <maddy@linux.vnet.ibm.com>, "Masami Hiramatsu" <mhiramat@kernel.org>, "Andrew Morton" <akpm@linux-foundation.org>, "Balbir Singh" <bsingharora@gmail.com>, "Sergey Senozhatsky" <sergey.senozhatsky@gmail.com>, "Christophe Leroy" <christophe.leroy@c-s.fr>, "Andrew Donnellan" <andrew.donnellan@au1.ibm.com>, "Daniel Axtens" <dja@axtens.net>, "Russell Currey" <ruscur@russell.cc>, "Joe Perches" <joe@perches.com>, "Bryant G. Ly" <bryantly@linux.vnet.ibm.com>, "Cédric Le Goater" <clg@kaod.org>, linux-kernel@vger.kernel.org Subject: [PATCH RFC 1/8] powerpc: Add barrier_nospec Date: Tue, 13 Mar 2018 19:32:59 +0100 [thread overview] Message-ID: <e1c146e5d43e8b2605af6e1330167d8e18d36f44.1520965380.git.msuchanek@suse.de> (raw) In-Reply-To: <cover.1520965380.git.msuchanek@suse.de> In-Reply-To: <cover.1520965380.git.msuchanek@suse.de> Copypasta from original gmb() and rfi implementation Signed-off-by: Michal Suchanek <msuchanek@suse.de> --- arch/powerpc/include/asm/barrier.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h index 10daa1d56e0a..8e47b3abe405 100644 --- a/arch/powerpc/include/asm/barrier.h +++ b/arch/powerpc/include/asm/barrier.h @@ -75,6 +75,15 @@ do { \ ___p1; \ }) +/* TODO: add patching so this can be disabled */ +/* Prevent speculative execution past this barrier. */ +#define barrier_nospec_asm ori 31,31,0 +#ifdef __ASSEMBLY__ +#define barrier_nospec barrier_nospec_asm +#else +#define barrier_nospec() __asm__ __volatile__ (stringify_in_c(barrier_nospec_asm) : : :) +#endif + #include <asm-generic/barrier.h> #endif /* _ASM_POWERPC_BARRIER_H */ -- 2.13.6
next prev parent reply other threads:[~2018-03-13 18:32 UTC|newest] Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-03-13 18:32 [PATCH RFC 0/8] powerpc barrier_nospec Michal Suchanek 2018-03-13 18:32 ` Michal Suchanek [this message] 2018-03-13 20:01 ` [PATCH RFC 1/8] powerpc: Add barrier_nospec Peter Zijlstra 2018-03-15 19:15 ` [PATCH RFC rebase 0/9] powerpc barrier_nospec Michal Suchanek 2018-03-15 19:15 ` [PATCH RFC rebase 1/9] powerpc: Add barrier_nospec Michal Suchanek 2018-03-15 19:15 ` [PATCH RFC rebase 2/9] powerpc: Use barrier_nospec in copy_from_user Michal Suchanek 2018-03-15 21:37 ` Linus Torvalds 2018-03-16 13:22 ` Michael Ellerman 2018-03-15 19:15 ` [PATCH RFC rebase 3/9] powerpc/64: Use barrier_nospec in syscall entry Michal Suchanek 2018-03-16 5:18 ` Nicholas Piggin 2018-03-16 9:15 ` Michal Suchánek 2018-03-16 10:46 ` Nicholas Piggin 2018-03-16 13:28 ` Michael Ellerman 2018-03-16 17:08 ` Linus Torvalds 2018-03-15 19:15 ` [PATCH RFC rebase 4/9] powerpc/64s: Use barrier_nospec in RFI_FLUSH_SLOT Michal Suchanek 2018-03-15 19:15 ` [PATCH RFC rebase 5/9] powerpc/64s: Add support for ori barrier_nospec patching Michal Suchanek 2018-03-15 19:15 ` [PATCH RFC rebase 6/9] powerpc/64: Patch barrier_nospec in modules Michal Suchanek 2018-03-15 19:15 ` [PATCH RFC rebase 7/9] powerpc/64: barrier_nospec: Add debugfs trigger Michal Suchanek 2018-03-15 19:15 ` [PATCH RFC rebase 8/9] powerpc/64s: barrier_nospec: Add hcall triggerr Michal Suchanek 2018-03-15 19:15 ` [PATCH RFC rebase 9/9] powerpc/64: barrier_nospec: Add commandline trigger Michal Suchanek 2018-03-23 15:59 ` Diana Madalina Craciun 2018-03-16 8:08 ` [PATCH RFC rebase 0/9] powerpc barrier_nospec Greg Kroah-Hartman 2018-03-16 9:31 ` Michal Suchánek 2018-03-13 18:33 ` [PATCH RFC 2/8] powerpc: Use barrier_nospec in copy_from_user Michal Suchanek 2018-03-13 18:33 ` [PATCH RFC 3/8] powerpc/64: Use barrier_nospec in syscall entry Michal Suchanek 2018-03-13 18:33 ` [PATCH RFC 4/8] powerpc/64s: Add support for ori barrier_nospec Michal Suchanek 2018-03-13 18:33 ` [PATCH RFC 5/8] powerpc/64: Patch barrier_nospec in modules Michal Suchanek 2018-03-13 18:33 ` [PATCH RFC 6/8] powerpc/64: barrier_nospec: Add debugfs trigger Michal Suchanek 2018-03-13 18:33 ` [PATCH RFC 7/8] powerpc/64s: barrier_nospec: Add hcall triggerr Michal Suchanek 2018-03-13 18:33 ` [PATCH RFC 8/8] powerpc/64: barrier_nospec: Add commandline trigger Michal Suchanek
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=e1c146e5d43e8b2605af6e1330167d8e18d36f44.1520965380.git.msuchanek@suse.de \ --to=msuchanek@suse.de \ --cc=akpm@linux-foundation.org \ --cc=andrew.donnellan@au1.ibm.com \ --cc=benh@kernel.crashing.org \ --cc=bryantly@linux.vnet.ibm.com \ --cc=bsingharora@gmail.com \ --cc=christophe.leroy@c-s.fr \ --cc=clg@kaod.org \ --cc=david@gibson.dropbear.id.au \ --cc=dja@axtens.net \ --cc=gregkh@linuxfoundation.org \ --cc=joe@perches.com \ --cc=kstewart@linuxfoundation.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linuxppc-dev@lists.ozlabs.org \ --cc=maddy@linux.vnet.ibm.com \ --cc=mahesh@linux.vnet.ibm.com \ --cc=me@tobin.cc \ --cc=mhiramat@kernel.org \ --cc=mikey@neuling.org \ --cc=mpe@ellerman.id.au \ --cc=naveen.n.rao@linux.vnet.ibm.com \ --cc=npiggin@gmail.com \ --cc=oohall@gmail.com \ --cc=paulus@samba.org \ --cc=peterz@infradead.org \ --cc=pombredanne@nexb.com \ --cc=ruscur@russell.cc \ --cc=sergey.senozhatsky@gmail.com \ --cc=viro@zeniv.linux.org.uk \ /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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).