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Re: [PATCH v4 3/3] xen/ppc: Implement initial Radix MMU support
- To: Shawn Anastasio <sanastasio@xxxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 5 Sep 2023 12:01:11 +0200
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- Cc: Timothy Pearson <tpearson@xxxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 05 Sep 2023 10:01:21 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 23.08.2023 01:03, Shawn Anastasio wrote:
> Add code to construct early identity-mapped page tables as well as the
> required process and partition tables to enable the MMU.
>
> Signed-off-by: Shawn Anastasio <sanastasio@xxxxxxxxxxxxxxxxxxxxx>
Having committed this, something broke in CI. As per the artifacts of
https://gitlab.com/xen-project/xen/-/jobs/5017915681 ...
> +void __init setup_initial_pagetables(void)
> +{
> + struct lvl1_pd *root = lvl1_pd_pool_alloc();
> + unsigned long lpcr;
> +
> + setup_initial_mapping(root, (vaddr_t)_start, (vaddr_t)_end,
> __pa(_start));
> +
> + /* Enable Radix mode in LPCR */
> + lpcr = mfspr(SPRN_LPCR);
> + mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
> + early_printk("Enabled radix in LPCR\n");
... this is the first message missing; setup_initial_mapping() appears
to be completing fine.
Jan
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