linux-kernel - Re: [PATCH v3 07/21] KVM: arm64: Rename KVM_PTE_LEAF_ATTR_S2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+EHjTyvMdjTAt3Q7ypniF10Qj3_1m_dos=EzxSSCe3Jeo3z4A@mail.gmail.com>
Date:   Mon, 2 Aug 2021 11:37:23 +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 v3 07/21] KVM: arm64: Rename KVM_PTE_LEAF_ATTR_S2_IGNORED

Hi Quentin,

On Thu, Jul 29, 2021 at 3:28 PM Quentin Perret <qperret@...gle.com> wrote:
>
> The ignored bits for both stage-1 and stage-2 page and block
> descriptors are in [55:58], so rename KVM_PTE_LEAF_ATTR_S2_IGNORED to
> make it applicable to both. And while at it, since these bits are more
> commonly known as 'software' bits, rename accordingly.

As in the Armv8-A Address Translation spec.

Reviewed-by: Fuad Tabba <tabba@...gle.com>

Thanks,
/fuad



> Signed-off-by: Quentin Perret <qperret@...gle.com>
> ---
>  arch/arm64/kvm/hyp/pgtable.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c
> index 4dff2ad39ee4..59a394d82de3 100644
> --- a/arch/arm64/kvm/hyp/pgtable.c
> +++ b/arch/arm64/kvm/hyp/pgtable.c
> @@ -36,6 +36,8 @@
>
>  #define KVM_PTE_LEAF_ATTR_HI           GENMASK(63, 51)
>
> +#define KVM_PTE_LEAF_ATTR_HI_SW                GENMASK(58, 55)
> +
>  #define KVM_PTE_LEAF_ATTR_HI_S1_XN     BIT(54)
>
>  #define KVM_PTE_LEAF_ATTR_HI_S2_XN     BIT(54)
> @@ -44,8 +46,6 @@
>                                          KVM_PTE_LEAF_ATTR_LO_S2_S2AP_W | \
>                                          KVM_PTE_LEAF_ATTR_HI_S2_XN)
>
> -#define KVM_PTE_LEAF_ATTR_S2_IGNORED   GENMASK(58, 55)
> -
>  #define KVM_INVALID_PTE_OWNER_MASK     GENMASK(63, 56)
>  #define KVM_MAX_OWNER_ID               1
>
> --
> 2.32.0.432.gabb21c7263-goog
>