KVM: PPC: Book3S HV: Context tracking exit guest context before enabling irqs

KVM: PPC: Book3S HV: Context tracking exit guest context before enabling irqs

[ Upstream commit 112665286d08c87e66d699e7cba43c1497ad165f ]

Interrupts that occur in kernel mode expect that context tracking
is set to kernel. Enabling local irqs before context tracking
switches from guest to host means interrupts can come in and trigger
warnings about wrong context, and possibly worse.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-3-npiggin@gmail.com
Stable-dep-of: 235cee162459 ("KVM: PPC: Tick accounting should defer vtime accounting 'til after IRQ handling")
Signed-off-by: Sasha Levin <sashal@kernel.org>