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From 7ac01358cfb1a7900cfc4b39714f9affb817dda0 Mon Sep 17 00:00:00 2001
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From: David Gibson <dgibson@redhat.com>
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Date: Mon, 16 Jul 2018 05:49:55 +0200
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Subject: [PATCH 45/89] 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: <20180716054955.12926-1-dgibson@redhat.com>
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Patchwork-id: 81358
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O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH] osdep: powerpc64 align memory to allow 2MB radix THP page tables
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Bugzilla: 1600797
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@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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Signed-off-by: David Gibson <dgibson@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@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 afc28e5..9ed6242 100644
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--- a/include/qemu/osdep.h
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+++ b/include/qemu/osdep.h
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@@ -367,7 +367,8 @@ 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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