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| author |   Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2019-11-28 20:58:05 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2019-12-06 12:14:45 +0000 |
| commit | 0492747c72a3db0425a234abafb763c5b28c845d (patch) | |
| tree | 971ffafe7f1468781a0b969fe0ae51f69655ca20 /arch/arm64/kvm/va_layout.c | |
| parent | arm64: Validate tagged addresses in access_ok() called from kernel threads (diff) | |
| download | linux-dev-0492747c72a3db0425a234abafb763c5b28c845d.tar.xz linux-dev-0492747c72a3db0425a234abafb763c5b28c845d.zip | |
arm64: KVM: Invoke compute_layout() before alternatives are applied
compute_layout() is invoked as part of an alternative fixup under
stop_machine(). This function invokes get_random_long() which acquires a
sleeping lock on -RT which can not be acquired in this context.
Rename compute_layout() to kvm_compute_layout() and invoke it before
stop_machine() applies the alternatives. Add a __init prefix to
kvm_compute_layout() because the caller has it, too (and so the code can be
discarded after boot).
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/kvm/va_layout.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/arch/arm64/kvm/va_layout.c b/arch/arm64/kvm/va_layout.c index 2cf7d4b606c3..dab1fea4752a 100644 --- a/arch/arm64/kvm/va_layout.c +++ b/arch/arm64/kvm/va_layout.c @@ -22,7 +22,7 @@ static u8 tag_lsb; static u64 tag_val; static u64 va_mask; -static void compute_layout(void) +__init void kvm_compute_layout(void) { phys_addr_t idmap_addr = __pa_symbol(__hyp_idmap_text_start); u64 hyp_va_msb; @@ -110,9 +110,6 @@ void __init kvm_update_va_mask(struct alt_instr *alt, BUG_ON(nr_inst != 5); - if (!has_vhe() && !va_mask) - compute_layout(); - for (i = 0; i < nr_inst; i++) { u32 rd, rn, insn, oinsn; @@ -156,9 +153,6 @@ void kvm_patch_vector_branch(struct alt_instr *alt, return; } - if (!va_mask) - compute_layout(); - /* * Compute HYP VA by using the same computation as kern_hyp_va() */ |