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From e54816f13676b09c4bd8899b466f8aafb9cf3d0e Mon Sep 17 00:00:00 2001
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From: David Gibson <dgibson@redhat.com>
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Date: Wed, 25 Jul 2018 07:35:49 +0100
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Subject: [PATCH 02/14] osdep: powerpc64 align memory to allow 2MB radix THP
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page tables
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RH-Author: David Gibson <dgibson@redhat.com>
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Message-id: <20180725073549.9857-1-dgibson@redhat.com>
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Patchwork-id: 81499
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O-Subject: [RHEL-8.0 qemu-kvm PATCH] osdep: powerpc64 align memory to allow 2MB radix THP page tables
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Bugzilla: 1601317
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Serhii Popovych <spopovyc@redhat.com>
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From: Nicholas Piggin <npiggin@gmail.com>
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This allows KVM with the Book3S radix MMU mode to take advantage of
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THP and install larger pages in the partition scope page tables (the
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host translation).
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Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
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Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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(cherry picked from commit 0c1272cc7c72dfe0ef66be8f283cf67c74b58586)
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1601317
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Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=17346107
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Signed-off-by: David Gibson <dgibson@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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include/qemu/osdep.h | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
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index 4165806..5910682 100644
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--- a/include/qemu/osdep.h
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+++ b/include/qemu/osdep.h
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@@ -357,7 +357,8 @@ void qemu_anon_ram_free(void *ptr, size_t size);
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#endif
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#if defined(__linux__) && \
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- (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__))
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+ (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \
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+ || defined(__powerpc64__))
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/* Use 2 MiB alignment so transparent hugepages can be used by KVM.
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Valgrind does not support alignments larger than 1 MiB,
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therefore we need special code which handles running on Valgrind. */
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--
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1.8.3.1
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