diff options
| author | Andrew Scull <ascull@google.com> | 2020-09-15 13:46:42 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-15 20:39:04 +0300 |
| commit | 04e4caa8d355d19fd7d26734bd2b9e3b563bb22a (patch) | |
| tree | 1d34c6b73889f17c590e6870dda984c3e0cf7e06 /arch/arm64/kvm/hyp.S | |
| parent | 054698316d87a13e4c0dc8f5ecdd77b12e5eb676 (diff) | |
| download | linux-04e4caa8d355d19fd7d26734bd2b9e3b563bb22a.tar.xz | |
KVM: arm64: nVHE: Migrate hyp-init to SMCCC
To complete the transition to SMCCC, the hyp initialization is given a
function ID. This looks neater than comparing the hyp stub function IDs
to the page table physical address.
Some care is taken to only clobber x0-3 before the host context is saved
as only those registers can be clobbered accoring to SMCCC. Fortunately,
only a few acrobatics are needed. The possible new tpidr_el2 is moved to
the argument in x2 so that it can be stashed in tpidr_el2 early to free
up a scratch register. The page table configuration then makes use of
x0-2.
Signed-off-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200915104643.2543892-19-ascull@google.com
Diffstat (limited to 'arch/arm64/kvm/hyp.S')
| -rw-r--r-- | arch/arm64/kvm/hyp.S | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S deleted file mode 100644 index 12aa426f7559..000000000000 --- a/arch/arm64/kvm/hyp.S +++ /dev/null @@ -1,22 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright (C) 2012,2013 - ARM Ltd - * Author: Marc Zyngier <marc.zyngier@arm.com> - */ - -#include <linux/linkage.h> - -#include <asm/alternative.h> -#include <asm/assembler.h> -#include <asm/cpufeature.h> - -/* - * u64 __kvm_call_hyp_init(phys_addr_t pgd_ptr, - * unsigned long hyp_stack_ptr, - * unsigned long vector_ptr, - * unsigned long tpidr_el2); - */ -SYM_FUNC_START(__kvm_call_hyp_init) - hvc #0 - ret -SYM_FUNC_END(__kvm_call_hyp_init) |