All of lore.kernel.org
 help / color / mirror / Atom feed
From: Nicholas Piggin <npiggin@gmail.com>
To: qemu-ppc@nongnu.org
Cc: Nicholas Piggin <npiggin@gmail.com>,
	David Gibson <david@gibson.dropbear.id.au>,
	Alexander Graf <agraf@suse.de>,
	kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH QEMU] osdep: powerpc64 align memory to allow 2MB radix THP page tables
Date: Sun, 06 May 2018 07:29:49 +0000	[thread overview]
Message-ID: <20180506072949.12783-1-npiggin@gmail.com> (raw)

This allows KVM with the Book3S radix MMU mode to take advantage of
THP and install larger pages in the partition scope page tables (the
host translation).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 include/qemu/osdep.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 41658060a7..5910682221 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -357,7 +357,8 @@ void qemu_anon_ram_free(void *ptr, size_t size);
 #endif
 
 #if defined(__linux__) && \
-    (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__))
+    (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \
+     || defined(__powerpc64__))
    /* Use 2 MiB alignment so transparent hugepages can be used by KVM.
       Valgrind does not support alignments larger than 1 MiB,
       therefore we need special code which handles running on Valgrind. */
-- 
2.17.0


WARNING: multiple messages have this Message-ID (diff)
From: Nicholas Piggin <npiggin@gmail.com>
To: qemu-ppc@nongnu.org
Cc: Nicholas Piggin <npiggin@gmail.com>,
	David Gibson <david@gibson.dropbear.id.au>,
	Alexander Graf <agraf@suse.de>,
	kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH QEMU] osdep: powerpc64 align memory to allow 2MB radix THP page tables
Date: Sun,  6 May 2018 17:29:49 +1000	[thread overview]
Message-ID: <20180506072949.12783-1-npiggin@gmail.com> (raw)

This allows KVM with the Book3S radix MMU mode to take advantage of
THP and install larger pages in the partition scope page tables (the
host translation).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 include/qemu/osdep.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 41658060a7..5910682221 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -357,7 +357,8 @@ void qemu_anon_ram_free(void *ptr, size_t size);
 #endif
 
 #if defined(__linux__) && \
-    (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__))
+    (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \
+     || defined(__powerpc64__))
    /* Use 2 MiB alignment so transparent hugepages can be used by KVM.
       Valgrind does not support alignments larger than 1 MiB,
       therefore we need special code which handles running on Valgrind. */
-- 
2.17.0

             reply	other threads:[~2018-05-06  7:29 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-06  7:29 Nicholas Piggin [this message]
2018-05-06  7:29 ` [PATCH QEMU] osdep: powerpc64 align memory to allow 2MB radix THP page tables Nicholas Piggin
2018-06-06  1:06 ` David Gibson
2018-06-06  1:06   ` David Gibson

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=20180506072949.12783-1-npiggin@gmail.com \
    --to=npiggin@gmail.com \
    --cc=agraf@suse.de \
    --cc=david@gibson.dropbear.id.au \
    --cc=kvm-ppc@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=qemu-ppc@nongnu.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.