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Date: Tue, 10 Aug 2021 06:37:43 +0200 From: Fuad Tabba <tabba@...gle.com> To: Quentin Perret <qperret@...gle.com> Cc: maz@...nel.org, james.morse@....com, alexandru.elisei@....com, suzuki.poulose@....com, catalin.marinas@....com, will@...nel.org, linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu, linux-kernel@...r.kernel.org, ardb@...nel.org, qwandor@...gle.com, dbrazdil@...gle.com, kernel-team@...roid.com Subject: Re: [PATCH v4 15/21] KVM: arm64: Introduce addr_is_memory() Hi Quentin, On Mon, Aug 9, 2021 at 5:25 PM Quentin Perret <qperret@...gle.com> wrote: > > Introduce a helper usable in nVHE protected mode to check whether a > physical address is in a RAM region or not. > > Signed-off-by: Quentin Perret <qperret@...gle.com> > --- Reviewed-by: Fuad Tabba <tabba@...gle.com> Thanks, /fuad > arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 1 + > arch/arm64/kvm/hyp/nvhe/mem_protect.c | 7 +++++++ > 2 files changed, 8 insertions(+) > > diff --git a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h > index 23316a021880..49db0ec5a606 100644 > --- a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h > +++ b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h > @@ -51,6 +51,7 @@ extern const u8 pkvm_hyp_id; > int __pkvm_prot_finalize(void); > int __pkvm_mark_hyp(phys_addr_t start, phys_addr_t end); > > +bool addr_is_memory(phys_addr_t phys); > int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_prot prot); > int host_stage2_set_owner_locked(phys_addr_t addr, u64 size, u8 owner_id); > int kvm_host_prepare_stage2(void *pgt_pool_base); > diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c > index ee255171945c..cb023d31666e 100644 > --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c > +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c > @@ -197,6 +197,13 @@ static bool find_mem_range(phys_addr_t addr, struct kvm_mem_range *range) > return false; > } > > +bool addr_is_memory(phys_addr_t phys) > +{ > + struct kvm_mem_range range; > + > + return find_mem_range(phys, &range); > +} > + > static bool range_is_memory(u64 start, u64 end) > { > struct kvm_mem_range r1, r2; > -- > 2.32.0.605.g8dce9f2422-goog >
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