3 Commits

Author	SHA1	Message	Date
Marc Zyngier	1bbd805498	arm64: KVM: perform save/restore of PAR_EL1 ... Not saving PAR_EL1 is an unfortunate oversight. If the guest performs an AT* operation and gets scheduled out before reading the result of the translation from PAREL1, it could become corrupted by another guest or the host. Saving this register is made slightly more complicated as KVM also uses it on the permission fault handling path, leading to an ugly "stash and restore" sequence. Fortunately, this is already a slow path so we don't really care. Also, Linux doesn't do any AT* operation, so Linux guests are not impacted by this bug. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>	2013-08-09 13:19:28 +01:00
Marc Zyngier	62a89c4495	arm64: KVM: 32bit handling of coprocessor traps ... Provide the necessary infrastructure to trap coprocessor accesses that occur when running 32bit guests. Also wire SMC and HVC trapped in 32bit mode while were at it. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>	2013-06-12 16:42:16 +01:00
Marc Zyngier	7c8c5e6a91	arm64: KVM: system register handling ... Provide 64bit system register handling, modeled after the cp15 handling for ARM. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>	2013-06-07 14:03:36 +01:00