Re: [PATCH] x86: efi: avoid BUILD_BUG_ON() for non-constant p4d_index

[Borislav Petkov]

On Thu, Feb 04, 2021 at 04:43:58PM -0500, Arvind Sankar wrote:
> This should check EFI_VA_END instead of EFI_VA_START, and maybe throw in
> a BUG_ON if EFI_VA_END >= EFI_VA_START.

No need:

        if (efi_va < EFI_VA_END) {
                pr_warn(FW_WARN "VA address range overflow!\n");
                return;
        }

We already check we're not going over at map time. And our runtime
services range is hardcoded. And we're switching to that PGD on each
runtime services call.

So I don't see the point for keeping any of the assertions.

Unless you have other valid arguments for keeping them...

-- 
Regards/Gruss,
    Boris.

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