diff options
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 | 10 |
2 files changed, 23 insertions, 6 deletions
diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S index ce9e5e5..70254a6 100644 --- a/arch/arm64/kvm/hyp/entry.S +++ b/arch/arm64/kvm/hyp/entry.S @@ -164,3 +164,22 @@ 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 3488894..2d87f36 100644 --- a/arch/arm64/kvm/hyp/hyp-entry.S +++ b/arch/arm64/kvm/hyp/hyp-entry.S @@ -42,19 +42,17 @@ * Shuffle the parameters before calling the function * pointed to in x0. Assumes parameters in x[1,2,3]. */ - sub sp, sp, #16 - str lr, [sp] mov lr, x0 mov x0, x1 mov x1, x2 mov x2, x3 blr lr - ldr lr, [sp] - add sp, sp, #16 .endm ENTRY(__vhe_hyp_call) + str lr, [sp, #-16]! do_el2_call + ldr lr, [sp], #16 /* * We used to rely on having an exception return to get * an implicit isb. In the E2H case, we don't have it anymore. @@ -84,8 +82,8 @@ alternative_endif /* Here, we're pretty sure the host called HVC. */ restore_x0_to_x3 - /* Check for __hyp_get_vectors */ - cbnz x0, 1f + cmp x0, #HVC_GET_VECTORS + b.ne 1f mrs x0, vbar_el2 b 2f |