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authorMarc Zyngier <marc.zyngier@arm.com>2018-05-29 13:11:16 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2018-05-31 18:00:55 +0100
commit55e3748e8902ff641e334226bdcb432f9a5d78d3 (patch)
tree958684771ff102d79d40080b685d6db6af6e272e /virt
parent85478bab409171de501b719971fd25a3d5d639f9 (diff)
downloadop-kernel-dev-55e3748e8902ff641e334226bdcb432f9a5d78d3.zip
op-kernel-dev-55e3748e8902ff641e334226bdcb432f9a5d78d3.tar.gz
arm64: KVM: Add ARCH_WORKAROUND_2 support for guests
In order to offer ARCH_WORKAROUND_2 support to guests, we need a bit of infrastructure. Let's add a flag indicating whether or not the guest uses SSBD mitigation. Depending on the state of this flag, allow KVM to disable ARCH_WORKAROUND_2 before entering the guest, and enable it when exiting it. Reviewed-by: Christoffer Dall <christoffer.dall@arm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/arm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index a4c1b76..2d9b479 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -1490,6 +1490,10 @@ static int init_hyp_mode(void)
}
}
+ err = hyp_map_aux_data();
+ if (err)
+ kvm_err("Cannot map host auxilary data: %d\n", err);
+
return 0;
out_err:
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