On Tue, Apr 26, 2022 at 11:36:40AM +0200, Juergen Gross wrote:
> As the suggestion was to add another flag this wouldn't be a problem IMO.
We had a problem already with adding one flag would break the same flag
on the other guest type. That's why we added cc_vendor too. So it can be
tricky.
> pla
On 26.04.22 10:41, Borislav Petkov wrote:
On Tue, Apr 26, 2022 at 07:16:16AM +0200, Juergen Gross wrote:
Christoph suggested (rather firmly) this would be the way to go.
Yeah, I saw it but I don't think it is the right way to go.
What happens the next time a guest needs to query the platform
On 25.04.22 23:25, Borislav Petkov wrote:
On Mon, Apr 25, 2022 at 11:38:36PM +0300, Oleksandr wrote:
diff --git a/include/linux/cc_platform.h b/include/linux/cc_platform.h
index efd8205..d06bc7a 100644
--- a/include/linux/cc_platform.h
+++ b/include/linux/cc_platform.h
@@ -72,6 +72,19 @@ enum cc
On Mon, Apr 25, 2022 at 11:38:36PM +0300, Oleksandr wrote:
> diff --git a/include/linux/cc_platform.h b/include/linux/cc_platform.h
> index efd8205..d06bc7a 100644
> --- a/include/linux/cc_platform.h
> +++ b/include/linux/cc_platform.h
> @@ -72,6 +72,19 @@ enum cc_attr {
> * Examples inclu
Hello all.
On 25.04.22 12:14, Juergen Gross wrote:
On 25.04.22 09:58, Christoph Hellwig wrote:
On Mon, Apr 25, 2022 at 09:47:49AM +0200, Juergen Gross wrote:
Would the Xen specific bits fit into Confidential Computing Platform
checks? I will let Juergen/Boris comment on this.
I don't thin
On 25.04.22 09:58, Christoph Hellwig wrote:
On Mon, Apr 25, 2022 at 09:47:49AM +0200, Juergen Gross wrote:
Would the Xen specific bits fit into Confidential Computing Platform
checks? I will let Juergen/Boris comment on this.
I don't think cc_platform_has would be correct here. Xen certainly
p
On Mon, Apr 25, 2022 at 09:47:49AM +0200, Juergen Gross wrote:
> > Would the Xen specific bits fit into Confidential Computing Platform
> > checks? I will let Juergen/Boris comment on this.
>
> I don't think cc_platform_has would be correct here. Xen certainly
> provides more isolation between gue
On 24.04.22 20:08, Boris Ostrovsky wrote:
On 4/24/22 12:53 PM, Oleksandr wrote:
On 23.04.22 19:40, Christoph Hellwig wrote:
+
+#ifdef CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
+int arch_has_restricted_virtio_memory_access(void)
+{
+ return (xen_has_restricted_virtio_memory_acce
On 24.04.22 18:53, Oleksandr wrote:
On 23.04.22 19:40, Christoph Hellwig wrote:
Hello Christoph
Please split this into one patch that creates grant-dma-ops, and another
that sets up the virtio restricted access helpers.
Sounds reasonable, will do:
1. grant-dma-ops.c with config XEN_GRANT
On 4/24/22 12:53 PM, Oleksandr wrote:
On 23.04.22 19:40, Christoph Hellwig wrote:
+
+#ifdef CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
+int arch_has_restricted_virtio_memory_access(void)
+{
+ return (xen_has_restricted_virtio_memory_access() ||
+ cc_platform_has(CC_AT
On 23.04.22 19:40, Christoph Hellwig wrote:
Hello Christoph
Please split this into one patch that creates grant-dma-ops, and another
that sets up the virtio restricted access helpers.
Sounds reasonable, will do:
1. grant-dma-ops.c with config XEN_GRANT_DMA_OPS
2. arch_has_restricted_vir
Please split this into one patch that creates grant-dma-ops, and another
that sets up the virtio restricted access helpers.
> +
> +#ifdef CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
> +int arch_has_restricted_virtio_memory_access(void)
> +{
> + return (xen_has_restricted_virtio_memory_acce
On 23.04.22 12:10, Juergen Gross wrote:
Hello Juergen
On 23.04.22 09:05, Oleksandr wrote:
On 23.04.22 02:00, Stefano Stabellini wrote:
Hello Stefano
On Fri, 22 Apr 2022, Oleksandr Tyshchenko wrote:
From: Juergen Gross
Introduce Xen grant DMA-mapping layer which contains special
DMA-
On 23.04.22 09:05, Oleksandr wrote:
On 23.04.22 02:00, Stefano Stabellini wrote:
Hello Stefano
On Fri, 22 Apr 2022, Oleksandr Tyshchenko wrote:
From: Juergen Gross
Introduce Xen grant DMA-mapping layer which contains special DMA-mapping
routines for providing grant references as DMA addre
On 23.04.22 02:00, Stefano Stabellini wrote:
Hello Stefano
On Fri, 22 Apr 2022, Oleksandr Tyshchenko wrote:
From: Juergen Gross
Introduce Xen grant DMA-mapping layer which contains special DMA-mapping
routines for providing grant references as DMA addresses to be used by
frontends (e.g. vi
On Fri, 22 Apr 2022, Oleksandr Tyshchenko wrote:
> From: Juergen Gross
>
> Introduce Xen grant DMA-mapping layer which contains special DMA-mapping
> routines for providing grant references as DMA addresses to be used by
> frontends (e.g. virtio) in Xen guests.
>
> In order to support virtio in
From: Juergen Gross
Introduce Xen grant DMA-mapping layer which contains special DMA-mapping
routines for providing grant references as DMA addresses to be used by
frontends (e.g. virtio) in Xen guests.
In order to support virtio in Xen guests add a config option XEN_VIRTIO
enabling the user to
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