From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au,
linux-nvdimm@lists.01.org, dan.j.williams@intel.com
Cc: Jan Kara <jack@suse.cz>, Jeff Moyer <jmoyer@redhat.com>,
msuchanek@suse.de, oohall@gmail.com,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v6 5/8] powerpc/pmem/of_pmem: Update of_pmem to use the new barrier instruction.
Date: Mon, 29 Jun 2020 19:27:19 +0530 [thread overview]
Message-ID: <20200629135722.73558-6-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20200629135722.73558-1-aneesh.kumar@linux.ibm.com>
of_pmem on POWER10 can now use phwsync instead of hwsync to ensure
all previous writes are architecturally visible for the platform
buffer flush.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
arch/powerpc/include/asm/cacheflush.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/powerpc/include/asm/cacheflush.h b/arch/powerpc/include/asm/cacheflush.h
index 54764c6e922d..95782f77d768 100644
--- a/arch/powerpc/include/asm/cacheflush.h
+++ b/arch/powerpc/include/asm/cacheflush.h
@@ -98,6 +98,13 @@ static inline void invalidate_dcache_range(unsigned long start,
mb(); /* sync */
}
+#define arch_pmem_flush_barrier arch_pmem_flush_barrier
+static inline void arch_pmem_flush_barrier(void)
+{
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ asm volatile(PPC_PHWSYNC ::: "memory");
+}
+
#include <asm-generic/cacheflush.h>
#endif /* _ASM_POWERPC_CACHEFLUSH_H */
--
2.26.2
next prev parent reply other threads:[~2020-06-29 14:16 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 13:57 [PATCH v6 0/8] Support new pmem flush and sync instructions for POWER Aneesh Kumar K.V
2020-06-29 13:57 ` [PATCH v6 1/8] powerpc/pmem: Restrict papr_scm to P8 and above Aneesh Kumar K.V
2020-06-29 13:57 ` [PATCH v6 2/8] powerpc/pmem: Add new instructions for persistent storage and sync Aneesh Kumar K.V
2020-06-29 13:57 ` [PATCH v6 3/8] powerpc/pmem: Add flush routines using new pmem store and sync instruction Aneesh Kumar K.V
2020-06-29 13:57 ` [PATCH v6 4/8] libnvdimm/nvdimm/flush: Allow architecture to override the flush barrier Aneesh Kumar K.V
2020-06-29 18:53 ` kernel test robot
2020-06-29 20:27 ` Aneesh Kumar K.V
2020-06-29 19:27 ` kernel test robot
2020-06-29 20:29 ` [PATCH updated] " Aneesh Kumar K.V
2020-06-30 1:32 ` Dan Williams
2020-06-30 5:01 ` Aneesh Kumar K.V
2020-06-30 7:06 ` Dan Williams
2020-06-30 7:22 ` Aneesh Kumar K.V
2020-06-30 7:53 ` Aneesh Kumar K.V
2020-06-30 12:48 ` Aneesh Kumar K.V
2020-06-30 19:21 ` Dan Williams
2020-06-29 13:57 ` Aneesh Kumar K.V [this message]
2020-06-30 1:38 ` [PATCH v6 5/8] powerpc/pmem/of_pmem: Update of_pmem to use the new barrier instruction Dan Williams
2020-06-30 5:05 ` Aneesh Kumar K.V
2020-06-30 7:16 ` Dan Williams
2020-06-29 13:57 ` [PATCH v6 6/8] powerpc/pmem: Avoid the barrier in flush routines Aneesh Kumar K.V
2020-06-29 16:09 ` Michal Suchánek
2020-06-29 20:40 ` Aneesh Kumar K.V
2020-06-30 1:50 ` Dan Williams
2020-06-30 8:54 ` Michal Suchánek
2020-06-30 9:20 ` Aneesh Kumar K.V
2020-06-30 19:45 ` Dan Williams
2020-07-01 3:09 ` Aneesh Kumar K.V
2020-07-01 5:08 ` Dan Williams
2020-06-29 13:57 ` [PATCH v6 7/8] powerpc/pmem: Add WARN_ONCE to catch the wrong usage of pmem flush functions Aneesh Kumar K.V
2020-06-30 1:52 ` Dan Williams
2020-06-30 5:05 ` Aneesh Kumar K.V
2020-06-29 13:57 ` [PATCH v6 8/8] powerpc/pmem: Initialize pmem device on newer hardware Aneesh Kumar K.V
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=20200629135722.73558-6-aneesh.kumar@linux.ibm.com \
--to=aneesh.kumar@linux.ibm.com \
--cc=dan.j.williams@intel.com \
--cc=jack@suse.cz \
--cc=jmoyer@redhat.com \
--cc=linux-nvdimm@lists.01.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mpe@ellerman.id.au \
--cc=msuchanek@suse.de \
--cc=oohall@gmail.com \
/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 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).