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Re: [PATCH 05/23] xen/arm: Add capabilities to dom0less
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Jason Andryuk <jason.andryuk@xxxxxxx>
- Date: Fri, 7 Mar 2025 11:50:10 -0500
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- Cc: <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, "Bertrand Marquis" <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, "Jan Beulich" <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Fri, 07 Mar 2025 16:50:18 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 2025-03-07 11:40, Jason Andryuk wrote:
On 2025-03-06 20:40, Stefano Stabellini wrote:
On Thu, 6 Mar 2025, Jason Andryuk wrote:
diff --git a/xen/arch/arm/dom0less-build.c b/xen/arch/arm/dom0less-
build.c
index 5a7871939b..068bf99294 100644
--- a/xen/arch/arm/dom0less-build.c
+++ b/xen/arch/arm/dom0less-build.c
@@ -12,6 +12,7 @@
#include <xen/sizes.h>
#include <xen/vmap.h>
+#include <public/bootfdt.h>
#include <public/io/xs_wire.h>
#include <asm/arm64/sve.h>
@@ -994,6 +995,34 @@ void __init create_domUs(void)
if ( (max_init_domid + 1) >= DOMID_FIRST_RESERVED )
panic("No more domain IDs available\n");
+ if ( dt_property_read_u32(node, "capabilities", &val) )
+ {
+ if ( val & ~DOMAIN_CAPS_MASK )
+ panic("Invalid capabilities (%"PRIx32")\n", val);
+
+ if ( val & DOMAIN_CAPS_CONTROL )
+ flags |= CDF_privileged;
+
+ if ( val & DOMAIN_CAPS_HARDWARE )
+ {
+ if ( hardware_domain )
+ panic("Only 1 hardware domain can be specified!
(%pd)\n",
+ hardware_domain);
+
+ d_cfg.max_grant_frames = gnttab_dom0_frames();
+ d_cfg.max_evtchn_port = -1;
max_maptrack_frames = -1 ?
Yes.
Actually, -1 is already used to initialize d_cfg.max_maptrack_frames.
Regards,
Jason
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