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From: David Woodhouse <dwmw2@infradead.org>
To: Peter Maydell <peter.maydell@linaro.org>, qemu-devel@nongnu.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Paul Durrant" <paul@xen.org>,
	"Joao Martins" <joao.m.martins@oracle.com>,
	"Ankur Arora" <ankur.a.arora@oracle.com>,
	"Philippe Mathieu-Daudé" <philmd@linaro.org>,
	"Thomas Huth" <thuth@redhat.com>,
	"Alex Bennée" <alex.bennee@linaro.org>,
	"Juan Quintela" <quintela@redhat.com>,
	"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
	"Claudio Fontana" <cfontana@suse.de>,
	"Julien Grall" <julien@xen.org>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
	armbru@redhat.com
Subject: [PATCH v9 48/58] i386/xen: handle HVMOP_get_param
Date: Sat, 28 Jan 2023 08:11:03 +0000	[thread overview]
Message-ID: <20230128081113.1615111-49-dwmw2@infradead.org> (raw)
In-Reply-To: <20230128081113.1615111-1-dwmw2@infradead.org>

From: Joao Martins <joao.m.martins@oracle.com>

Which is used to fetch xenstore PFN and port to be used
by the guest. This is preallocated by the toolstack when
guest will just read those and use it straight away.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
 target/i386/kvm/xen-emu.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index 860253807f..b2c63047e9 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -762,6 +762,42 @@ out:
     return true;
 }
 
+static bool handle_get_param(struct kvm_xen_exit *exit, X86CPU *cpu,
+                             uint64_t arg)
+{
+    CPUState *cs = CPU(cpu);
+    struct xen_hvm_param hp;
+    int err = 0;
+
+    /* No need for 32/64 compat handling */
+    qemu_build_assert(sizeof(hp) == 16);
+
+    if (kvm_copy_from_gva(cs, arg, &hp, sizeof(hp))) {
+        err = -EFAULT;
+        goto out;
+    }
+
+    if (hp.domid != DOMID_SELF && hp.domid != xen_domid) {
+        err = -ESRCH;
+        goto out;
+    }
+
+    switch (hp.index) {
+    case HVM_PARAM_STORE_PFN:
+        hp.value = XEN_SPECIAL_PFN(XENSTORE);
+        break;
+    default:
+        return false;
+    }
+
+    if (kvm_copy_to_gva(cs, arg, &hp, sizeof(hp))) {
+        err = -EFAULT;
+    }
+out:
+    exit->u.hcall.result = err;
+    return true;
+}
+
 static int kvm_xen_hcall_evtchn_upcall_vector(struct kvm_xen_exit *exit,
                                               X86CPU *cpu, uint64_t arg)
 {
@@ -806,6 +842,9 @@ static bool kvm_xen_hcall_hvm_op(struct kvm_xen_exit *exit, X86CPU *cpu,
     case HVMOP_set_param:
         return handle_set_param(exit, cpu, arg);
 
+    case HVMOP_get_param:
+        return handle_get_param(exit, cpu, arg);
+
     default:
         return false;
     }
-- 
2.39.0



  parent reply	other threads:[~2023-01-28  8:21 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-28  8:10 [PATCH v9 00/58] Xen HVM support under KVM David Woodhouse
2023-01-28  8:10 ` [PATCH v9 01/58] include: import Xen public headers to include/standard-headers/ David Woodhouse
2023-01-30  8:41   ` Thomas Huth
2023-01-31  8:26     ` David Woodhouse
2023-01-28  8:10 ` [PATCH v9 02/58] xen: add CONFIG_XEN_BUS and CONFIG_XEN_EMU options for Xen emulation David Woodhouse
2023-01-28  8:10 ` [PATCH v9 03/58] xen: Add XEN_DISABLED mode and make it default David Woodhouse
2023-01-28  8:10 ` [PATCH v9 04/58] i386/kvm: Add xen-version KVM accelerator property and init KVM Xen support David Woodhouse
2023-01-28  8:10 ` [PATCH v9 05/58] i386/kvm: handle Xen HVM cpuid leaves David Woodhouse
2023-01-28  8:10 ` [PATCH v9 06/58] i386/hvm: Set Xen vCPU ID in KVM David Woodhouse
2023-01-28  8:10 ` [PATCH v9 07/58] xen-platform: exclude vfio-pci from the PCI platform unplug David Woodhouse
2023-01-28  8:10 ` [PATCH v9 08/58] xen-platform: allow its creation with XEN_EMULATE mode David Woodhouse
2023-01-28  8:10 ` [PATCH v9 09/58] i386/xen: handle guest hypercalls David Woodhouse
2023-01-28  8:10 ` [PATCH v9 10/58] i386/xen: implement HYPERVISOR_xen_version David Woodhouse
2023-01-28  8:10 ` [PATCH v9 11/58] i386/xen: implement HYPERVISOR_sched_op, SCHEDOP_shutdown David Woodhouse
2023-01-28  8:10 ` [PATCH v9 12/58] i386/xen: Implement SCHEDOP_poll and SCHEDOP_yield David Woodhouse
2023-01-28  8:10 ` [PATCH v9 13/58] hw/xen: Add xen_overlay device for emulating shared xenheap pages David Woodhouse
2023-01-28  8:10 ` [PATCH v9 14/58] i386/xen: add pc_machine_kvm_type to initialize XEN_EMULATE mode David Woodhouse
2023-01-28  8:10 ` [PATCH v9 15/58] i386/xen: manage and save/restore Xen guest long_mode setting David Woodhouse
2023-01-28  8:10 ` [PATCH v9 16/58] i386/xen: implement HYPERVISOR_memory_op David Woodhouse
2023-01-28  8:10 ` [PATCH v9 17/58] i386/xen: implement XENMEM_add_to_physmap_batch David Woodhouse
2023-01-28  8:10 ` [PATCH v9 18/58] i386/xen: implement HYPERVISOR_hvm_op David Woodhouse
2023-01-28  8:10 ` [PATCH v9 19/58] i386/xen: implement HYPERVISOR_vcpu_op David Woodhouse
2023-01-28  8:10 ` [PATCH v9 20/58] i386/xen: handle VCPUOP_register_vcpu_info David Woodhouse
2023-01-28  8:10 ` [PATCH v9 21/58] i386/xen: handle VCPUOP_register_vcpu_time_info David Woodhouse
2023-01-28  8:10 ` [PATCH v9 22/58] i386/xen: handle VCPUOP_register_runstate_memory_area David Woodhouse
2023-01-28  8:10 ` [PATCH v9 23/58] i386/xen: implement HYPERVISOR_event_channel_op David Woodhouse
2023-01-28  8:10 ` [PATCH v9 24/58] i386/xen: implement HVMOP_set_evtchn_upcall_vector David Woodhouse
2023-01-28  8:10 ` [PATCH v9 25/58] i386/xen: implement HVMOP_set_param David Woodhouse
2023-01-28  8:10 ` [PATCH v9 26/58] hw/xen: Add xen_evtchn device for event channel emulation David Woodhouse
2023-01-28  8:10 ` [PATCH v9 27/58] i386/xen: Add support for Xen event channel delivery to vCPU David Woodhouse
2023-01-28  8:10 ` [PATCH v9 28/58] hw/xen: Implement EVTCHNOP_status David Woodhouse
2023-01-28  8:10 ` [PATCH v9 29/58] hw/xen: Implement EVTCHNOP_close David Woodhouse
2023-01-28  8:10 ` [PATCH v9 30/58] hw/xen: Implement EVTCHNOP_unmask David Woodhouse
2023-01-28  8:10 ` [PATCH v9 31/58] hw/xen: Implement EVTCHNOP_bind_virq David Woodhouse
2023-01-28  8:10 ` [PATCH v9 32/58] hw/xen: Implement EVTCHNOP_bind_ipi David Woodhouse
2023-01-28  8:10 ` [PATCH v9 33/58] hw/xen: Implement EVTCHNOP_send David Woodhouse
2023-01-28  8:10 ` [PATCH v9 34/58] hw/xen: Implement EVTCHNOP_alloc_unbound David Woodhouse
2023-01-28  8:10 ` [PATCH v9 35/58] hw/xen: Implement EVTCHNOP_bind_interdomain David Woodhouse
2023-01-28  8:10 ` [PATCH v9 36/58] hw/xen: Implement EVTCHNOP_bind_vcpu David Woodhouse
2023-01-28  8:10 ` [PATCH v9 37/58] hw/xen: Implement EVTCHNOP_reset David Woodhouse
2023-01-28  8:10 ` [PATCH v9 38/58] i386/xen: add monitor commands to test event injection David Woodhouse
2023-01-28  8:10 ` [PATCH v9 39/58] hw/xen: Support HVM_PARAM_CALLBACK_TYPE_GSI callback David Woodhouse
2023-01-28  8:10 ` [PATCH v9 40/58] hw/xen: Support HVM_PARAM_CALLBACK_TYPE_PCI_INTX callback David Woodhouse
2023-01-28  8:10 ` [PATCH v9 41/58] kvm/i386: Add xen-gnttab-max-frames property David Woodhouse
2023-01-28  8:10 ` [PATCH v9 42/58] hw/xen: Add xen_gnttab device for grant table emulation David Woodhouse
2023-01-28  8:10 ` [PATCH v9 43/58] hw/xen: Support mapping grant frames David Woodhouse
2023-01-28  8:10 ` [PATCH v9 44/58] i386/xen: Implement HYPERVISOR_grant_table_op and GNTTABOP_[gs]et_verson David Woodhouse
2023-01-28  8:11 ` [PATCH v9 45/58] hw/xen: Implement GNTTABOP_query_size David Woodhouse
2023-01-28  8:11 ` [PATCH v9 46/58] i386/xen: handle PV timer hypercalls David Woodhouse
2023-01-28  8:11 ` [PATCH v9 47/58] i386/xen: Reserve Xen special pages for console, xenstore rings David Woodhouse
2023-01-28  8:11 ` David Woodhouse [this message]
2023-01-28  8:11 ` [PATCH v9 49/58] hw/xen: Add backend implementation of interdomain event channel support David Woodhouse
2023-01-28  8:11 ` [PATCH v9 50/58] hw/xen: Add xen_xenstore device for xenstore emulation David Woodhouse
2023-01-28  8:11 ` [PATCH v9 51/58] hw/xen: Add basic ring handling to xenstore David Woodhouse
2023-01-28  8:11 ` [PATCH v9 52/58] hw/xen: Automatically add xen-platform PCI device for emulated Xen guests David Woodhouse
2023-01-28  8:11 ` [PATCH v9 53/58] i386/xen: Document Xen HVM emulation David Woodhouse
2023-01-28  8:11 ` [PATCH v9 54/58] i386/xen: Implement HYPERVISOR_physdev_op David Woodhouse
2023-01-28  8:11 ` [PATCH v9 55/58] hw/xen: Implement emulated PIRQ hypercall support David Woodhouse
2023-01-28  8:11 ` [PATCH v9 56/58] hw/xen: Support GSI mapping to PIRQ David Woodhouse
2023-01-28  8:11 ` [PATCH v9 57/58] hw/xen: Support MSI " David Woodhouse
2023-01-28  8:11 ` [PATCH v9 58/58] kvm/i386: Add xen-evtchn-max-pirq property David Woodhouse

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