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Re: [PATCH v2] xen/consoled: clean up console handling for PV shim
- To: dmkhn@xxxxxxxxx
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 25 Feb 2025 09:09:40 +0100
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- Cc: andrew.cooper3@xxxxxxxxxx, anthony.perard@xxxxxxxxxx, julien@xxxxxxx, michal.orzel@xxxxxxx, roger.pau@xxxxxxxxxx, sstabellini@xxxxxxxxxx, dmukhin@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 25 Feb 2025 08:09:51 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 23.02.2025 00:58, dmkhn@xxxxxxxxx wrote:
> --- a/xen/common/domain.c
> +++ b/xen/common/domain.c
> @@ -46,6 +46,7 @@
>
> #ifdef CONFIG_X86
> #include <asm/guest.h>
> +#include <asm/pv/shim.h>
> #endif
This change isn't needed. It's the purpose of asm/guest.h to
include, among other headers, asm/pv/shim.h.
> @@ -562,13 +560,12 @@ static void __serial_rx(char c)
> rc = vpl011_rx_char_xen(d, c);
> #endif
>
> -#ifdef CONFIG_X86
> - if ( pv_shim && pv_console )
> - consoled_guest_tx(c);
> -#endif
> + if ( consoled_is_enabled() )
> + /* Deliver input to the PV shim console. */
> + rc = consoled_guest_tx(c);
>
> if ( rc )
> - guest_printk(d, XENLOG_G_WARNING
> + guest_printk(d, XENLOG_WARNING
> "failed to process console input: %d\n", rc);
This change looks wrong to me. If there's a need to do so, I think this
needs mentioning in the description or even splitting into a separate
patch.
> --- a/xen/include/xen/consoled.h
> +++ b/xen/include/xen/consoled.h
> @@ -1,14 +1,36 @@
> -#ifndef __XEN_CONSOLED_H__
> -#define __XEN_CONSOLED_H__
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +#ifndef XEN__CONSOLED_H
> +#define XEN__CONSOLED_H
This also isn't mentioned anywhere, not even in passing. I'd actually
suggest to leave header guards alone until we have settled on a final
naming scheme. The one that was put in place is under debate again.
Jan
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