lkml.org 
[lkml]   [2021]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH v3 07/32] KVM: arm64: Introduce a BSS section for use at Hyp
    On Tue, Mar 02, 2021 at 02:59:37PM +0000, Quentin Perret wrote:
    > Currently, the hyp code cannot make full use of a bss, as the kernel
    > section is mapped read-only.
    >
    > While this mapping could simply be changed to read-write, it would
    > intermingle even more the hyp and kernel state than they currently are.
    > Instead, introduce a __hyp_bss section, that uses reserved pages, and
    > create the appropriate RW hyp mappings during KVM init.
    >
    > Signed-off-by: Quentin Perret <qperret@google.com>
    > ---
    > arch/arm64/include/asm/sections.h | 1 +
    > arch/arm64/kernel/vmlinux.lds.S | 52 ++++++++++++++++++++-----------
    > arch/arm64/kvm/arm.c | 14 ++++++++-
    > arch/arm64/kvm/hyp/nvhe/hyp.lds.S | 1 +
    > 4 files changed, 49 insertions(+), 19 deletions(-)

    Acked-by: Will Deacon <will@kernel.org>

    Will

    \
     
     \ /
      Last update: 2021-03-04 15:12    [W:3.044 / U:0.048 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site