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| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-06-30 18:40:44 +0100 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2016-07-03 23:41:27 +0200 |
| commit | 3421e9d88d7ae70fbc8c903e44a5acace8ae2d29 (patch) | |
| tree | 5c01693941098bc3d6a20d5ee4b0c88c2d895e2e /arch/arm64/kvm/hyp | |
| parent | 0535a3e2b2d518a21d93e7cfe07821f1b24ccd0c (diff) | |
| download | linux-3421e9d88d7ae70fbc8c903e44a5acace8ae2d29.tar.bz2 | |
arm64: KVM: Simplify HYP init/teardown
Now that we only have the "merged page tables" case to deal with,
there is a bunch of things we can simplify in the HYP code (both
at init and teardown time).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/kvm/hyp')
| -rw-r--r-- | arch/arm64/kvm/hyp/entry.S | 19 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/hyp-entry.S | 15 |
2 files changed, 15 insertions, 19 deletions
diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S index 70254a65bd5b..ce9e5e5f28cf 100644 --- a/arch/arm64/kvm/hyp/entry.S +++ b/arch/arm64/kvm/hyp/entry.S @@ -164,22 +164,3 @@ alternative_endif eret ENDPROC(__fpsimd_guest_restore) - -/* - * When using the extended idmap, we don't have a trampoline page we can use - * while we switch pages tables during __kvm_hyp_reset. Accessing the idmap - * directly would be ideal, but if we're using the extended idmap then the - * idmap is located above HYP_PAGE_OFFSET, and the address will be masked by - * kvm_call_hyp using kern_hyp_va. - * - * x0: HYP boot pgd - * x1: HYP phys_idmap_start - */ -ENTRY(__extended_idmap_trampoline) - mov x4, x1 - adr_l x3, __kvm_hyp_reset - - /* insert __kvm_hyp_reset()s offset into phys_idmap_start */ - bfi x4, x3, #0, #PAGE_SHIFT - br x4 -ENDPROC(__extended_idmap_trampoline) diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S index 2d87f36d5cb4..f6d9694ae3b1 100644 --- a/arch/arm64/kvm/hyp/hyp-entry.S +++ b/arch/arm64/kvm/hyp/hyp-entry.S @@ -62,6 +62,21 @@ ENTRY(__vhe_hyp_call) isb ret ENDPROC(__vhe_hyp_call) + +/* + * Compute the idmap address of __kvm_hyp_reset based on the idmap + * start passed as a parameter, and jump there. + * + * x0: HYP phys_idmap_start + */ +ENTRY(__kvm_hyp_teardown) + mov x4, x0 + adr_l x3, __kvm_hyp_reset + + /* insert __kvm_hyp_reset()s offset into phys_idmap_start */ + bfi x4, x3, #0, #PAGE_SHIFT + br x4 +ENDPROC(__kvm_hyp_teardown) el1_sync: // Guest trapped into EL2 save_x0_to_x3 |