On Mon, Aug 22, 2016 at 05:38:59PM -0500, Tom Lendacky wrote:
> Since the setup data is in memory in the clear, it must be accessed as
> un-encrypted. Always use ioremap (similar to sysfs setup data support)
> to map the data.
>
> Signed-off-by: Tom Lendacky <[email protected]>
> ---
> arch/x86/kernel/kdebugfs.c | 30 +++++++++++-------------------
> 1 file changed, 11 insertions(+), 19 deletions(-)
>
> diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
> index bdb83e4..a58a82e 100644
> --- a/arch/x86/kernel/kdebugfs.c
> +++ b/arch/x86/kernel/kdebugfs.c
> @@ -48,17 +48,13 @@ static ssize_t setup_data_read(struct file *file, char
> __user *user_buf,
>
> pa = node->paddr + sizeof(struct setup_data) + pos;
> pg = pfn_to_page((pa + count - 1) >> PAGE_SHIFT);
> - if (PageHighMem(pg)) {
Why is it ok to get rid of the PageHighMem() check?
Btw, we did talk earlier in the thread about making __va() clear the SME
mask and then you won't really need to change stuff here. Or?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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