On 16.07.25 23:14, Jason Andryuk wrote:
Write the associated event channel into the xenstore page so xenstored can read it. xenstored can map the grant by the reserved grant table entry, and then read out the event channel and bind it. This eliminates the need for an additional mechanism to discover the event channel.Signed-off-by: Jason Andryuk <jason.andr...@amd.com> --- xen/common/device-tree/dom0less-build.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/common/device-tree/dom0less-build.c b/xen/common/device-tree/dom0less-build.c index a2789e3bdf..284139bf14 100644 --- a/xen/common/device-tree/dom0less-build.c +++ b/xen/common/device-tree/dom0less-build.c @@ -26,6 +26,7 @@ #include <public/io/xs_wire.h>#include <asm/dom0less-build.h>+#include <asm/guest_access.h> #include <asm/setup.h>#include <xen/static-memory.h>@@ -126,8 +127,14 @@ static void __init initialize_domU_xenstore(void)if ( gfn != XENSTORE_PFN_LATE_ALLOC && IS_ENABLED(CONFIG_GRANT_TABLE) ){ + evtchn_port_t port = d->arch.hvm.params[HVM_PARAM_STORE_EVTCHN]; + paddr_t evtchn_gaddr = gfn_to_gaddr(_gfn(gfn)) + + offsetof(struct xenstore_domain_interface, evtchn_port); + ASSERT(gfn < UINT32_MAX); gnttab_seed_entry(d, GNTTAB_RESERVED_XENSTORE, xs_domid, gfn); + access_guest_memory_by_gpa(d, evtchn_gaddr, &port, sizeof(port), + true /* is_write */);
I couldn't find access_guest_memory_by_gpa() for x86. I think you either need to introduce it for all archs, or you need to handle this differently. Juergen
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