arm64: kvm: deal with kernel symbols outside of linear mapping
KVM on arm64 uses a fixed offset between the linear mapping at EL1 and
the HYP mapping at EL2. Before we can move the kernel virtual mapping
out of the linear mapping, we have to make sure that references to kernel
symbols that are accessed via the HYP mapping are translated to their
linear equivalent.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index dda1959..975da6c 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -982,7 +982,7 @@
pgd_ptr = kvm_mmu_get_httbr();
stack_page = __this_cpu_read(kvm_arm_hyp_stack_page);
hyp_stack_ptr = stack_page + PAGE_SIZE;
- vector_ptr = (unsigned long)__kvm_hyp_vector;
+ vector_ptr = (unsigned long)kvm_ksym_ref(__kvm_hyp_vector);
__cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr);
@@ -1074,13 +1074,15 @@
/*
* Map the Hyp-code called directly from the host
*/
- err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end);
+ err = create_hyp_mappings(kvm_ksym_ref(__kvm_hyp_code_start),
+ kvm_ksym_ref(__kvm_hyp_code_end));
if (err) {
kvm_err("Cannot map world-switch code\n");
goto out_free_mappings;
}
- err = create_hyp_mappings(__start_rodata, __end_rodata);
+ err = create_hyp_mappings(kvm_ksym_ref(__start_rodata),
+ kvm_ksym_ref(__end_rodata));
if (err) {
kvm_err("Cannot map rodata section\n");
goto out_free_mappings;