Re: [PATCH RFC 0/4] x86/fixmap: Unify FIXADDR_TOP

["Hou Wenlong" <houwenlong.hwl@xxxxxxxxxxxx>]

On Mon, May 15, 2023 at 04:19:31PM +0800, Hou Wenlong wrote:
> This patchset unifies FIXADDR_TOP as a variable for x86, allowing the
> fixmap area to be movable and relocated with the kernel image in the
> x86/PIE patchset [0]. This enables the kernel image to be relocated in
> the top 512G of the address space.
> 
> [0] 
> https://lore.kernel.org/lkml/cover.1682673542.git.houwenlong.hwl@xxxxxxxxxxxx
> 
> Hou Wenlong (4):
>   x86/vsyscall: Don't use set_fixmap() to map vsyscall page
>   x86/xen: Pin up to VSYSCALL_ADDR when vsyscall page is out of fixmap
>     area
>   x86/fixmap: Move vsyscall page out of fixmap area
>   x86/fixmap: Unify FIXADDR_TOP
> 
>  arch/x86/entry/vsyscall/vsyscall_64.c |  7 +-----
>  arch/x86/include/asm/fixmap.h         | 28 ++++-------------------
>  arch/x86/include/asm/paravirt.h       |  7 ++++++
>  arch/x86/include/asm/paravirt_types.h |  4 ++++
>  arch/x86/include/asm/vsyscall.h       | 13 +++++++++++
>  arch/x86/kernel/head64.c              |  1 -
>  arch/x86/kernel/head_64.S             |  6 ++---
>  arch/x86/kernel/paravirt.c            |  4 ++++
>  arch/x86/mm/dump_pagetables.c         |  3 ++-
>  arch/x86/mm/fault.c                   |  1 -
>  arch/x86/mm/init_64.c                 |  2 +-
>  arch/x86/mm/ioremap.c                 |  5 ++---
>  arch/x86/mm/pgtable.c                 | 13 +++++++++++
>  arch/x86/mm/pgtable_32.c              |  3 ---
>  arch/x86/xen/mmu_pv.c                 | 32 +++++++++++++++++++--------
>  15 files changed, 77 insertions(+), 52 deletions(-)
> 
> 
> base-commit: f585d5177e1aad174fd6da0e3936b682ed58ced0
> --
> 2.31.1
Hi,

Just wanted to send a kind ping on this patchset.

Thanks.