On Tue, 08 Jan 2019 14:07:19 +0000,
Julien Thierry [off-list ref] wrote:

When using VHE, the host needs to clear HCR_EL2.TGE bit in order
to interract with guest TLBs, switching from EL2&0 translation regime
to EL1&0.

However, some non-maskable asynchronous event could happen while TGE is
cleared like SDEI. Because of this address translation operations
relying on EL2&0 translation regime could fail (tlb invalidation,
userspace access, ...).

Fix this by properly setting HCR_EL2.TGE when entering NMI context and
clear it if necessary when returning to the interrupted context.

Signed-off-by: Julien Thierry <redacted>
Suggested-by: Marc Zyngier <redacted>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <redacted>
Cc: Marc Zyngier <redacted>
Cc: James Morse <james.morse@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: stable@vger.kernel.org

Reviewed-by: Marc Zyngier <redacted>

Thanks,

	M.

-- 
Jazz is not dead, it just smell funny.

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