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author | James Morse <james.morse@arm.com> | 2018-07-20 10:56:17 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-22 14:27:40 +0200 |
commit | 8bace8ac81580d0e1b95563411bbf898b1d19787 (patch) | |
tree | 8617467e33259865fecf6e984e80407e21c1b273 /arch/arm64/kernel | |
parent | eea59020a7f2993018ccde317387031c04c62036 (diff) |
KVM: arm64: Stop save/restoring host tpidr_el1 on VHE
Commit 1f742679c33bc083722cb0b442a95d458c491b56 upstream.
Now that a VHE host uses tpidr_el2 for the cpu offset we no longer
need KVM to save/restore tpidr_el1. Move this from the 'common' code
into the non-vhe code. While we're at it, on VHE we don't need to
save the ELR or SPSR as kernel_entry in entry.S will have pushed these
onto the kernel stack, and will restore them from there. Move these
to the non-vhe code as we need them to get back to the host.
Finally remove the always-copy-tpidr we hid in the stage2 setup
code, cpufeature's enable callback will do this for VHE, we only
need KVM to do it for non-vhe. Add the copy into kvm-init instead.
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm64/kernel')
0 files changed, 0 insertions, 0 deletions