Kristina Martsenko 26aa7b3b1c arm64: KVM: fix VTTBR_BADDR_MASK BUG_ON off-by-one ... VTTBR_BADDR_MASK is used to sanity check the size and alignment of the VTTBR address. It seems to currently be off by one, thereby only allowing up to 47-bit addresses (instead of 48-bit) and also insufficiently checking the alignment. This patch fixes it. As an example, with 4k pages, before this patch we have: PHYS_MASK_SHIFT = 48 VTTBR_X = 37 - 24 = 13 VTTBR_BADDR_SHIFT = 13 - 1 = 12 VTTBR_BADDR_MASK = ((1 << 35) - 1) << 12 = 0x00007ffffffff000 Which is wrong, because the mask doesn't allow bit 47 of the VTTBR address to be set, and only requires the address to be 12-bit (4k) aligned, while it actually needs to be 13-bit (8k) aligned because we concatenate two 4k tables. With this patch, the mask becomes 0x0000ffffffffe000, which is what we want. Fixes: 0369f6a34b ("arm64: KVM: EL2 register definitions") Cc: <stable@vger.kernel.org> # 3.11.x Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>		2017-11-29 16:46:17 +01:00
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asm	arm64: KVM: fix VTTBR_BADDR_MASK BUG_ON off-by-one	2017-11-29 16:46:17 +01:00
uapi/asm	First batch of KVM changes for 4.15	2017-11-16 13:00:24 -08:00