diff options
| author | David Brazdil <dbrazdil@google.com> | 2020-12-02 19:41:05 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-12-04 11:08:32 +0100 |
| commit | 5be1d6226d35800393579340f35b8b0d7b2a3177 (patch) | |
| tree | d847cd987cb5aef89127415f4e0574cf16323729 /arch/arm64/include/asm/kvm_mmu.h | |
| parent | arm64: Extract parts of el2_setup into a macro (diff) | |
| download | linux-5be1d6226d35800393579340f35b8b0d7b2a3177.tar.xz linux-5be1d6226d35800393579340f35b8b0d7b2a3177.zip | |
KVM: arm64: Remove vector_ptr param of hyp-init
KVM precomputes the hyp VA of __kvm_hyp_host_vector, essentially a
constant (minus ASLR), before passing it to __kvm_hyp_init.
Now that we have alternatives for converting kimg VA to hyp VA, replace
this with computing the constant inside __kvm_hyp_init, thus removing
the need for an argument.
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201202184122.26046-10-dbrazdil@google.com
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 5633c5a27aad..ab6f96df20df 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -94,6 +94,30 @@ alternative_cb_end sub \reg, \reg, \tmp .endm +/* + * Convert a kernel image address to a hyp VA + * reg: kernel address to be converted in place + * tmp: temporary register + * + * The actual code generation takes place in kvm_get_kimage_voffset, and + * the instructions below are only there to reserve the space and + * perform the register allocation (kvm_update_kimg_phys_offset uses the + * specific registers encoded in the instructions). + */ +.macro kimg_hyp_va reg, tmp +alternative_cb kvm_update_kimg_phys_offset + movz \tmp, #0 + movk \tmp, #0, lsl #16 + movk \tmp, #0, lsl #32 + movk \tmp, #0, lsl #48 +alternative_cb_end + + sub \reg, \reg, \tmp + mov_q \tmp, PAGE_OFFSET + orr \reg, \reg, \tmp + kern_hyp_va \reg +.endm + #else #include <linux/pgtable.h> |