From: "Cédric Le Goater" <clg@kaod.org>
To: "Philippe Mathieu-Daudé" <f4bug@amsat.org>, qemu-devel@nongnu.org
Cc: qemu-ppc@nongnu.org, "Peter Maydell" <peter.maydell@linaro.org>,
"Andrew Jeffery" <andrew@aj.id.au>,
"Alistair Francis" <alistair@alistair23.me>,
"Greg Kurz" <groug@kaod.org>, "Peter Xu" <peterx@redhat.com>,
qemu-arm@nongnu.org, "Hervé Poussineau" <hpoussin@reactos.org>,
"Joel Stanley" <joel@jms.id.au>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"David Gibson" <david@gibson.dropbear.id.au>
Subject: Re: [PATCH 2/5] hw/arm/aspeed: Do not sysbus-map mmio flash region directly, use alias
Date: Wed, 17 Mar 2021 19:30:46 +0100 [thread overview]
Message-ID: <871fce3d-8b3c-bcce-6170-9010b1ed7d5c@kaod.org> (raw)
In-Reply-To: <20210312182851.1922972-3-f4bug@amsat.org>
On 3/12/21 7:28 PM, Philippe Mathieu-Daudé wrote:
> The flash mmio region is exposed as an AddressSpace.
> AddressSpaces must not be sysbus-mapped, therefore map
> the region using an alias.
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
That does the trick but you need an extra change in the model.
The fixes are in my aspeed-6.0 branch on GH and they survive the last
patch of your series :
[PATCH 5/5] memory: Make sure root MR won't be added as subregion
I will upstream for 6.1.
Thanks,
C.
> ---
> include/hw/ssi/aspeed_smc.h | 1 +
> hw/ssi/aspeed_smc.c | 4 +++-
> 2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/include/hw/ssi/aspeed_smc.h b/include/hw/ssi/aspeed_smc.h
> index 16c03fe64f3..e3c96cecbd8 100644
> --- a/include/hw/ssi/aspeed_smc.h
> +++ b/include/hw/ssi/aspeed_smc.h
> @@ -84,6 +84,7 @@ struct AspeedSMCState {
>
> MemoryRegion mmio;
> MemoryRegion mmio_flash;
> + MemoryRegion mmio_flash_alias;
>
> qemu_irq irq;
> int irqline;
> diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
> index 16addee4dc8..aa26578bdac 100644
> --- a/hw/ssi/aspeed_smc.c
> +++ b/hw/ssi/aspeed_smc.c
> @@ -1386,7 +1386,9 @@ static void aspeed_smc_realize(DeviceState *dev, Error **errp)
> memory_region_init_io(&s->mmio_flash, OBJECT(s),
> &aspeed_smc_flash_default_ops, s, name,
> s->ctrl->flash_window_size);
> - sysbus_init_mmio(sbd, &s->mmio_flash);
> + memory_region_init_alias(&s->mmio_flash_alias, OBJECT(s), name,
> + &s->mmio_flash, 0, s->ctrl->flash_window_size);
> + sysbus_init_mmio(sbd, &s->mmio_flash_alias);
>
> s->flashes = g_new0(AspeedSMCFlash, s->ctrl->max_peripherals);
>
>
next prev parent reply other threads:[~2021-03-17 18:47 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-12 18:28 [PATCH 0/5] memory: Forbid mapping AddressSpace root MemoryRegion Philippe Mathieu-Daudé
2021-03-12 18:28 ` [PATCH 1/5] hw/arm/aspeed: Do not directly map ram container onto main address bus Philippe Mathieu-Daudé
2021-03-17 17:15 ` Cédric Le Goater
2021-03-12 18:28 ` [PATCH 2/5] hw/arm/aspeed: Do not sysbus-map mmio flash region directly, use alias Philippe Mathieu-Daudé
2021-03-13 12:05 ` Philippe Mathieu-Daudé
2021-03-17 18:46 ` Cédric Le Goater
2021-04-16 5:38 ` Philippe Mathieu-Daudé
2021-03-17 18:30 ` Cédric Le Goater [this message]
2021-03-17 19:00 ` Philippe Mathieu-Daudé
2021-03-17 19:03 ` Cédric Le Goater
2021-03-12 18:28 ` [PATCH 3/5] hw/pci-host/prep: Remove unuseful memory region mapping Philippe Mathieu-Daudé
2021-03-12 20:38 ` Peter Xu
2021-03-22 4:09 ` David Gibson
2021-04-16 6:24 ` Philippe Mathieu-Daudé
2021-03-12 18:28 ` [PATCH 4/5] hw/pci-host/prep: Do not directly map bus-master region onto main bus Philippe Mathieu-Daudé
2021-03-22 4:11 ` David Gibson
2021-03-12 18:28 ` [PATCH 5/5] memory: Make sure root MR won't be added as subregion Philippe Mathieu-Daudé
2021-03-13 11:14 ` Philippe Mathieu-Daudé
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