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| author | Alexander Graf <agraf@suse.de> | 2016-03-04 01:09:46 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-03-15 15:13:00 -0400 |
| commit | 9bb367a590feac21d674e4d2cee77702d4774819 (patch) | |
| tree | 03ded1f537f9b0c2857f6efe1de441635206466b /arch/arm/cpu | |
| parent | 0691484ac1efb1981dfd1b38df9646128bafff32 (diff) | |
| download | blackbird-obmc-uboot-9bb367a590feac21d674e4d2cee77702d4774819.tar.gz blackbird-obmc-uboot-9bb367a590feac21d674e4d2cee77702d4774819.zip | |
arm64: Disable TTBR1 maps in EL1
When running in EL1, AArch64 knows two page table maps. One with addresses
that start with all zeros (TTBR0) and one with addresses that start with all
ones (TTBR1).
In U-Boot we don't care about the high up maps, so just disable them to ensure
we don't walk an invalid page table by accident.
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv8/cache_v8.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c index 9229532efa..d92f2d1768 100644 --- a/arch/arm/cpu/armv8/cache_v8.c +++ b/arch/arm/cpu/armv8/cache_v8.c @@ -71,7 +71,7 @@ static u64 get_tcr(int el, u64 *pips, u64 *pva_bits) } if (el == 1) { - tcr = TCR_EL1_RSVD | (ips << 32); + tcr = TCR_EL1_RSVD | (ips << 32) | TCR_EPD1_DISABLE; } else if (el == 2) { tcr = TCR_EL2_RSVD | (ips << 16); } else { |
