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From: Joao Martins <joao.m.martins@oracle.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	xen-devel@lists.xenproject.org
Cc: "Ankur Arora" <ankur.a.arora@oracle.com>,
	"Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
	"Joao Martins" <joao.m.martins@oracle.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Juergen Gross" <jgross@suse.com>,
	"Stefano Stabellini" <sstabellini@kernel.org>
Subject: [PATCH RFC 35/39] xen/xenbus: xen_shim_domain() support
Date: Wed, 20 Feb 2019 20:16:05 +0000	[thread overview]
Message-ID: <20190220201609.28290-36-joao.m.martins@oracle.com> (raw)
In-Reply-To: <20190220201609.28290-1-joao.m.martins@oracle.com>

From: Ankur Arora <ankur.a.arora@oracle.com>

Fixup the gnttab unmap_ops (and other data structures) to handle
host_addr as an OUT parameter from the call to GNTTABOP_map_grant_ref.

Also, allow xenstored to be hosted in XS_LOCAL mode for
xen_shim_domain() -- this means that it does not need to acquire
xenstore evtchn and pfn externally.

Co-developed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
---
 drivers/xen/xenbus/xenbus_client.c       | 23 +++++++++++++++++------
 drivers/xen/xenbus/xenbus_dev_backend.c  |  4 ++--
 drivers/xen/xenbus/xenbus_dev_frontend.c |  4 ++--
 drivers/xen/xenbus/xenbus_probe.c        |  8 ++++----
 4 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index ada1c9aa6525..b22149a789d4 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -487,8 +487,11 @@ static int __xenbus_map_ring(struct xenbus_device *dev,
 					 "mapping in shared page %d from domain %d",
 					 gnt_refs[i], dev->otherend_id);
 			goto fail;
-		} else
+		} else {
 			handles[i] = map[i].handle;
+			if (xen_shim_domain())
+				addrs[i] = map[i].host_addr;
+		}
 	}
 
 	return GNTST_okay;
@@ -498,7 +501,8 @@ static int __xenbus_map_ring(struct xenbus_device *dev,
 		if (handles[i] != INVALID_GRANT_HANDLE) {
 			memset(&unmap[j], 0, sizeof(unmap[j]));
 			gnttab_set_unmap_op(&unmap[j], (phys_addr_t)addrs[i],
-					    GNTMAP_host_map, handles[i]);
+					    !xen_shim_domain()?GNTMAP_host_map:0,
+					    handles[i]);
 			j++;
 		}
 	}
@@ -546,7 +550,7 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
 				      void **vaddr)
 {
 	struct xenbus_map_node *node;
-	int err;
+	int i, err;
 	void *addr;
 	bool leaked = false;
 	struct map_ring_valloc_hvm info = {
@@ -572,9 +576,16 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
 			     &info);
 
 	err = __xenbus_map_ring(dev, gnt_ref, nr_grefs, node->handles,
-				info.phys_addrs, GNTMAP_host_map, &leaked);
+				info.phys_addrs,
+				!xen_shim_domain() ? GNTMAP_host_map : 0,
+				&leaked);
 	node->nr_handles = nr_grefs;
 
+	if (xen_shim_domain()) {
+		for (i = 0; i < nr_grefs; i++)
+			node->hvm.pages[i] = virt_to_page(info.phys_addrs[i]);
+	}
+
 	if (err)
 		goto out_free_ballooned_pages;
 
@@ -882,7 +893,7 @@ int xenbus_unmap_ring(struct xenbus_device *dev,
 
 	for (i = 0; i < nr_handles; i++)
 		gnttab_set_unmap_op(&unmap[i], vaddrs[i],
-				    GNTMAP_host_map, handles[i]);
+				    !xen_shim_domain()?GNTMAP_host_map:0, handles[i]);
 
 	if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i))
 		BUG();
@@ -926,7 +937,7 @@ static const struct xenbus_ring_ops ring_ops_hvm = {
 	.unmap = xenbus_unmap_ring_vfree_hvm,
 };
 
-void __init xenbus_ring_ops_init(void)
+void xenbus_ring_ops_init(void)
 {
 #ifdef CONFIG_XEN_PV
 	if (!xen_feature(XENFEAT_auto_translated_physmap))
diff --git a/drivers/xen/xenbus/xenbus_dev_backend.c b/drivers/xen/xenbus/xenbus_dev_backend.c
index edba5fecde4d..b605c87bff76 100644
--- a/drivers/xen/xenbus/xenbus_dev_backend.c
+++ b/drivers/xen/xenbus/xenbus_dev_backend.c
@@ -119,11 +119,11 @@ static struct miscdevice xenbus_backend_dev = {
 	.fops = &xenbus_backend_fops,
 };
 
-static int __init xenbus_backend_init(void)
+int xenbus_backend_init(void)
 {
 	int err;
 
-	if (!xen_initial_domain())
+	if (!xen_initial_domain() && !xen_shim_domain())
 		return -ENODEV;
 
 	err = misc_register(&xenbus_backend_dev);
diff --git a/drivers/xen/xenbus/xenbus_dev_frontend.c b/drivers/xen/xenbus/xenbus_dev_frontend.c
index a4080d04a01c..c6fca6cca6c8 100644
--- a/drivers/xen/xenbus/xenbus_dev_frontend.c
+++ b/drivers/xen/xenbus/xenbus_dev_frontend.c
@@ -680,11 +680,11 @@ static struct miscdevice xenbus_dev = {
 	.fops = &xen_xenbus_fops,
 };
 
-static int __init xenbus_frontend_init(void)
+static int xenbus_frontend_init(void)
 {
 	int err;
 
-	if (!xen_domain())
+	if (!xen_domain() && !xen_shim_domain())
 		return -ENODEV;
 
 	err = misc_register(&xenbus_dev);
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 2e0ed46b05e7..bbc405cd01ef 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -693,7 +693,7 @@ EXPORT_SYMBOL_GPL(xenbus_probe);
 
 static int __init xenbus_probe_initcall(void)
 {
-	if (!xen_domain())
+	if (!xen_domain() && !xen_shim_domain())
 		return -ENODEV;
 
 	if (xen_initial_domain() || xen_hvm_domain())
@@ -790,7 +790,7 @@ int xenbus_init(void)
 	uint64_t v = 0;
 	xen_store_domain_type = XS_UNKNOWN;
 
-	if (!xen_domain())
+	if (!xen_domain() && !xen_shim_domain())
 		return -ENODEV;
 
 	xenbus_ring_ops_init();
@@ -799,7 +799,7 @@ int xenbus_init(void)
 		xen_store_domain_type = XS_PV;
 	if (xen_hvm_domain())
 		xen_store_domain_type = XS_HVM;
-	if (xen_hvm_domain() && xen_initial_domain())
+	if ((xen_hvm_domain() && xen_initial_domain()) || xen_shim_domain())
 		xen_store_domain_type = XS_LOCAL;
 	if (xen_pv_domain() && !xen_start_info->store_evtchn)
 		xen_store_domain_type = XS_LOCAL;
@@ -863,7 +863,7 @@ postcore_initcall(xenbus_init);
 
 void xenbus_deinit(void)
 {
-	if (!xen_domain())
+	if (!xen_domain() && !xen_shim_domain())
 		return;
 
 #ifdef CONFIG_XEN_COMPAT_XENFS
-- 
2.11.0


  parent reply	other threads:[~2019-02-20 20:19 UTC|newest]

Thread overview: 126+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-20 20:15 [PATCH RFC 00/39] x86/KVM: Xen HVM guest support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 01/39] KVM: x86: fix Xen hypercall page msr handling Joao Martins
2019-02-22  1:30   ` Sean Christopherson
2019-02-22 11:47     ` Joao Martins
2019-02-22 12:51     ` Paolo Bonzini
2020-11-30 10:39       ` David Woodhouse
2020-11-30 11:03         ` Paolo Bonzini
2020-11-30 11:27           ` David Woodhouse
2019-02-20 20:15 ` [PATCH RFC 02/39] KVM: x86/xen: intercept xen hypercalls if enabled Joao Martins
2019-02-21 18:29   ` Sean Christopherson
2019-02-21 20:56     ` Joao Martins
2019-02-22  0:30       ` Sean Christopherson
2019-02-22 12:50         ` Paolo Bonzini
2020-12-01  9:48   ` David Woodhouse
2020-12-01 11:19     ` David Woodhouse
2020-12-02 11:17       ` Joao Martins
2020-12-02 12:12         ` David Woodhouse
2020-12-02  5:19     ` Ankur Arora
2020-12-02  8:03       ` David Woodhouse
2020-12-02 18:20         ` Ankur Arora
2019-02-20 20:15 ` [PATCH RFC 03/39] KVM: x86/xen: register shared_info page Joao Martins
2020-12-01 13:07   ` David Woodhouse
2020-12-02  0:40     ` Ankur Arora
2020-12-02  1:26       ` David Woodhouse
2020-12-02  5:17         ` Ankur Arora
2020-12-02 10:50           ` Joao Martins
2020-12-02 10:44       ` Joao Martins
2020-12-02 12:20         ` David Woodhouse
2020-12-02 20:32           ` Ankur Arora
2020-12-03 10:16             ` David Woodhouse
2020-12-04 17:30               ` Sean Christopherson
2020-12-02 20:33         ` Ankur Arora
2020-12-12 12:07       ` David Woodhouse
2019-02-20 20:15 ` [PATCH RFC 04/39] KVM: x86/xen: setup pvclock updates Joao Martins
2019-02-20 20:15 ` [PATCH RFC 05/39] KVM: x86/xen: update wallclock region Joao Martins
2019-02-20 20:15 ` [PATCH RFC 06/39] KVM: x86/xen: register vcpu info Joao Martins
2019-02-20 20:15 ` [PATCH RFC 07/39] KVM: x86/xen: register vcpu time info region Joao Martins
2019-02-20 20:15 ` [PATCH RFC 08/39] KVM: x86/xen: register steal clock Joao Martins
2019-02-20 20:15 ` [PATCH RFC 09/39] KVM: x86: declare Xen HVM guest capability Joao Martins
2019-02-20 20:15 ` [PATCH RFC 10/39] KVM: x86/xen: support upcall vector Joao Martins
2020-12-02 11:17   ` David Woodhouse
2020-12-02 13:12     ` Joao Martins
2020-12-02 16:47       ` David Woodhouse
2020-12-02 18:34         ` Joao Martins
2020-12-02 19:02           ` David Woodhouse
2020-12-02 20:12             ` Joao Martins
2020-12-02 20:37               ` David Woodhouse
2020-12-03  1:08             ` Ankur Arora
2020-12-08 16:08             ` David Woodhouse
2020-12-09  6:35               ` Ankur Arora
2020-12-09 10:27                 ` David Woodhouse
2020-12-09 10:51                   ` Joao Martins
2020-12-09 11:39                     ` David Woodhouse
2020-12-09 13:26                       ` Joao Martins
2020-12-09 15:41                         ` David Woodhouse
2020-12-09 16:12                           ` Joao Martins
2021-01-01 14:33           ` David Woodhouse
2021-01-05 12:11             ` Joao Martins
2021-01-05 13:23               ` David Woodhouse
2019-02-20 20:15 ` [PATCH RFC 11/39] KVM: x86/xen: evtchn signaling via eventfd Joao Martins
2020-11-30  9:41   ` David Woodhouse
2020-11-30 12:17     ` Joao Martins
2020-11-30 12:55       ` David Woodhouse
2020-11-30 15:08         ` Joao Martins
2020-11-30 16:48           ` David Woodhouse
2020-11-30 17:15             ` Joao Martins
2020-11-30 18:01               ` David Woodhouse
2020-11-30 18:41                 ` Joao Martins
2020-11-30 19:04                   ` David Woodhouse
2020-11-30 19:25                     ` Joao Martins
2021-11-23 13:15           ` David Woodhouse
2019-02-20 20:15 ` [PATCH RFC 12/39] KVM: x86/xen: store virq when assigning evtchn Joao Martins
     [not found]   ` <b750291466f3c89e0a393e48079c087704b217a5.camel@amazon.co.uk>
2022-02-10 12:17     ` Joao Martins
2022-02-10 15:23       ` [EXTERNAL] " David Woodhouse
2019-02-20 20:15 ` [PATCH RFC 13/39] KVM: x86/xen: handle PV timers oneshot mode Joao Martins
2019-02-20 20:15 ` [PATCH RFC 14/39] KVM: x86/xen: handle PV IPI vcpu yield Joao Martins
2019-02-20 20:15 ` [PATCH RFC 15/39] KVM: x86/xen: handle PV spinlocks slowpath Joao Martins
2022-02-08 12:36   ` David Woodhouse
2022-02-10 12:17     ` Joao Martins
2022-02-10 14:11       ` David Woodhouse
2019-02-20 20:15 ` [PATCH RFC 16/39] KVM: x86: declare Xen HVM evtchn offload capability Joao Martins
2019-02-20 20:15 ` [PATCH RFC 17/39] x86/xen: export vcpu_info and shared_info Joao Martins
2019-02-20 20:15 ` [PATCH RFC 18/39] x86/xen: make hypercall_page generic Joao Martins
2019-02-20 20:15 ` [PATCH RFC 19/39] xen/xenbus: xenbus uninit support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 20/39] xen-blkback: module_exit support Joao Martins
2019-02-25 18:57   ` Konrad Rzeszutek Wilk
2019-02-26 11:20     ` Joao Martins
2019-02-20 20:15 ` [PATCH RFC 21/39] KVM: x86/xen: domid allocation Joao Martins
2019-02-20 20:15 ` [PATCH RFC 22/39] KVM: x86/xen: grant table init Joao Martins
2019-02-20 20:15 ` [PATCH RFC 23/39] KVM: x86/xen: grant table grow support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 24/39] KVM: x86/xen: backend hypercall support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 25/39] KVM: x86/xen: grant map support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 26/39] KVM: x86/xen: grant unmap support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 27/39] KVM: x86/xen: grant copy support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 28/39] KVM: x86/xen: interdomain evtchn support Joao Martins
2019-02-20 20:15 ` [PATCH RFC 29/39] KVM: x86/xen: evtchn unmask support Joao Martins
2019-02-20 20:16 ` [PATCH RFC 30/39] KVM: x86/xen: add additional evtchn ops Joao Martins
2019-02-20 20:16 ` [PATCH RFC 31/39] xen-shim: introduce shim domain driver Joao Martins
2019-02-20 20:16 ` [PATCH RFC 32/39] xen/balloon: xen_shim_domain() support Joao Martins
2019-02-20 20:16 ` [PATCH RFC 33/39] xen/grant-table: " Joao Martins
2019-02-20 20:16 ` [PATCH RFC 34/39] xen/gntdev: " Joao Martins
2019-02-20 20:16 ` Joao Martins [this message]
2019-02-20 20:16 ` [PATCH RFC 36/39] drivers/xen: " Joao Martins
2019-02-20 20:16 ` [PATCH RFC 37/39] xen-netback: " Joao Martins
2019-02-20 20:16 ` [PATCH RFC 38/39] xen-blkback: " Joao Martins
2019-02-20 20:16 ` [PATCH RFC 39/39] KVM: x86: declare Xen HVM Dom0 capability Joao Martins
2019-02-20 21:09 ` [PATCH RFC 00/39] x86/KVM: Xen HVM guest support Paolo Bonzini
2019-02-21  0:29   ` Ankur Arora
2019-02-21 11:45   ` Joao Martins
2019-02-22 16:59     ` Paolo Bonzini
2019-03-12 17:14       ` Joao Martins
2019-04-08  6:44         ` Juergen Gross
2019-04-08 10:36           ` Joao Martins
2019-04-08 10:42             ` Juergen Gross
2019-04-08 17:31               ` Joao Martins
2019-04-09  0:35                 ` Stefano Stabellini
2019-04-10  5:50                   ` [Xen-devel] " Ankur Arora
2019-04-10 20:45                     ` Stefano Stabellini
2019-04-09  5:04                 ` Juergen Gross
2019-04-10  6:55                   ` Ankur Arora
2019-04-10  7:14                     ` Juergen Gross
2019-02-20 23:39 ` [Xen-devel] " Marek Marczykowski-Górecki
2019-02-21  0:31   ` Ankur Arora
2019-02-21  7:57   ` Juergen Gross
2019-02-21 12:00     ` Joao Martins
2019-02-21 11:55   ` Joao Martins

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