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From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>,
	Sergio Lopez <slp@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	qemu-devel@nongnu.org, Igor Mammedov <imammedo@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH 13/13] microvm/acpi: use GSI 16-23 for virtio
Date: Fri, 20 Mar 2020 11:30:16 -0400
Message-ID: <20200320153016.GK4541@char.us.oracle.com> (raw)
In-Reply-To: <20200319080117.7725-14-kraxel@redhat.com>

On Thu, Mar 19, 2020 at 09:01:17AM +0100, Gerd Hoffmann wrote:
> With ACPI enabled and IO-APIC being properly declared in the ACPI tables
> we can use interrupt lines 16-23 for virtio and avoid shared interrupts.

7 interrupt lines? Is there a specific requirements of which
ones should be assigned to what device?

Or perhaps - could you include /proc/interrupts in the commit if that is OK?

> 
> With acpi disabled we continue to use lines 8-15.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  hw/i386/microvm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
> index 834b10aee0a2..139181daed06 100644
> --- a/hw/i386/microvm.c
> +++ b/hw/i386/microvm.c
> @@ -122,7 +122,7 @@ static void microvm_devices_init(MicrovmMachineState *mms)
>  
>      kvmclock_create();
>  
> -    mms->virtio_irq_base = 8;
> +    mms->virtio_irq_base = acpi_enabled ? 16 : 8;
>      for (i = 0; i < VIRTIO_NUM_TRANSPORTS; i++) {
>          sysbus_create_simple("virtio-mmio",
>                               VIRTIO_MMIO_BASE + i * 512,
> -- 
> 2.18.2
> 


  reply index

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19  8:01 [PATCH 00/13] microvm: add acpi support Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 01/13] acpi: make build_madt() more generic Gerd Hoffmann
2020-03-19  9:34   ` Philippe Mathieu-Daudé
2020-03-19  8:01 ` [PATCH 02/13] acpi: factor out acpi_dsdt_add_fw_cfg() Gerd Hoffmann
2020-03-19  9:36   ` Philippe Mathieu-Daudé
2020-03-19 12:16   ` Igor Mammedov
2020-03-19  8:01 ` [PATCH 03/13] microvm: add isa-acpi device Gerd Hoffmann
2020-03-19 13:42   ` Igor Mammedov
2020-03-20  8:22     ` Gerd Hoffmann
2020-03-20 14:54       ` Igor Mammedov
2020-03-19  8:01 ` [PATCH 04/13] microvm: add minimal acpi support Gerd Hoffmann
2020-03-19 14:00   ` Igor Mammedov
2020-03-25  9:04     ` Gerd Hoffmann
2020-03-25 18:59       ` Igor Mammedov
2020-03-19  8:01 ` [PATCH 05/13] microvm: add acpi_dsdt_add_virtio() for x86 Gerd Hoffmann
2020-03-19 14:30   ` Igor Mammedov
2020-03-20  8:19     ` Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 06/13] microvm: disable virtio-mmio cmdline hack Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 07/13] [testing] seabios: update submodule to experimental microvm branch Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 08/13] [testing] seabios: update config & build rules Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 09/13] [testing] seabios: update binaries to experimental microvm branch Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 10/13] microvm/acpi: add rtc Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 11/13] microvm/acpi: add serial Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 12/13] microvm: make virtio irq base runtime configurable Gerd Hoffmann
2020-03-19  8:01 ` [PATCH 13/13] microvm/acpi: use GSI 16-23 for virtio Gerd Hoffmann
2020-03-20 15:30   ` Konrad Rzeszutek Wilk [this message]
2020-03-23 10:23     ` Gerd Hoffmann
2020-03-19  8:19 ` [PATCH 00/13] microvm: add acpi support no-reply
2020-03-19  8:23 ` no-reply
2020-03-19  8:24 ` no-reply
2020-03-19  8:49 ` Paolo Bonzini
2020-03-19  9:33   ` Gerd Hoffmann
2020-03-19  9:59     ` Paolo Bonzini
2020-03-19 11:28       ` Gerd Hoffmann
2020-03-19 13:40   ` Gerd Hoffmann
2020-03-19 17:34     ` Paolo Bonzini
2020-03-20  8:32       ` Gerd Hoffmann
2020-03-20 10:41         ` Paolo Bonzini
2020-03-23 10:51 ` Michael S. Tsirkin
2020-03-23 12:09   ` Gerd Hoffmann
2020-03-23 12:16     ` Igor Mammedov
2020-03-25  9:16       ` Gerd Hoffmann
2020-03-25  9:53         ` Igor Mammedov
2020-03-25 18:56         ` Igor Mammedov
2020-03-25 12:32 ` Igor Mammedov
2020-03-25 15:03   ` Gerd Hoffmann
2020-03-25 18:44     ` Igor Mammedov
2020-03-26  7:33       ` Michael S. Tsirkin
2020-03-26 10:59         ` Igor Mammedov
2020-03-27 12:06       ` Gerd Hoffmann
2020-03-27 14:05         ` Igor Mammedov

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