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From adb3feea5dde087d7bb8017e5b8da2da548473bf Mon Sep 17 00:00:00 2001
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Message-Id: <adb3feea5dde087d7bb8017e5b8da2da548473bf.1566225007.git.aquini@redhat.com>
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In-Reply-To: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
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References: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
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From: Sandipan Das <sandipan@linux.ibm.com>
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Date: Wed, 12 Jun 2019 12:34:32 +0530
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Subject: [RHEL7 PATCH 15/31] ld.hugetlbfs: powerpc64: Add support for
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different huge page sizes
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This ensures that the page and slice sizes are determined by
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looking at the default huge page size and MMU type rather than
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having them hardcoded.
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This is important because powerpc64 supports different huge
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page sizes based on the MMU type. Hash MMU supports 16MB and
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16GB whereas Radix MMU supports 2MB and 1GB.
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Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
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Signed-off-by: Eric B Munson <emunson@mgebm.net>
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Signed-off-by: Rafael Aquini <aquini@redhat.com>
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---
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ld.hugetlbfs | 17 +++++++++++++++--
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1 file changed, 15 insertions(+), 2 deletions(-)
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diff --git a/ld.hugetlbfs b/ld.hugetlbfs
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index 388f7b4..6ee8238 100755
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--- a/ld.hugetlbfs
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+++ b/ld.hugetlbfs
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@@ -105,8 +105,16 @@ fi
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MB=$((1024*1024))
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case "$EMU" in
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-elf32ppclinux|elf64ppc) HPAGE_SIZE=$((16*$MB)) SLICE_SIZE=$((256*$MB)) ;;
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-elf64lppc) HPAGE_SIZE=$((16*$MB)) SLICE_SIZE=$((256*$MB)) ;;
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+elf32ppclinux) HPAGE_SIZE=$((16*$MB)) SLICE_SIZE=$((256*$MB)) ;;
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+elf64ppc|elf64lppc)
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+ hpage_kb=$(cat /proc/meminfo | grep Hugepagesize: | awk '{print $2}')
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+ MMU_TYPE=$(cat /proc/cpuinfo | grep MMU | awk '{ print $3}')
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+ HPAGE_SIZE=$((hpage_kb * 1024))
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+ if [ "$MMU_TYPE" == "Hash" ] ; then
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+ SLICE_SIZE=$((256*$MB))
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+ else
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+ SLICE_SIZE=$HPAGE_SIZE
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+ fi ;;
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elf_i386|elf_x86_64) HPAGE_SIZE=$((4*$MB)) SLICE_SIZE=$HPAGE_SIZE ;;
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elf_s390|elf64_s390) HPAGE_SIZE=$((1*$MB)) SLICE_SIZE=$HPAGE_SIZE ;;
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armelf*_linux_eabi|aarch64elf*|aarch64linux*)
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@@ -124,6 +132,11 @@ if [ "$HTLB_ALIGN" == "slice" ]; then
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case "$EMU" in
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armelf*_linux_eabi|aarch64elf*|aarch64linux*) HTLBOPTS="$HTLBOPTS -Ttext-segment=$SLICE_SIZE" ;;
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elf_i386) HTLBOPTS="$HTLBOPTS -Ttext-segment=0x08000000" ;;
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+ elf64ppc|elf64lppc)
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+ if [ "$MMU_TYPE" == "Hash" ] ; then
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+ printf -v TEXTADDR "%x" "$SLICE_SIZE"
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+ HTLBOPTS="$HTLBOPTS -Ttext-segment=$TEXTADDR"
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+ fi ;;
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esac
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fi
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--
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1.8.3.1
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