From: David Woodhouse <dwmw2@infradead.org>
To: 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 v7 10/51] i386/xen: implement HYPERVISOR_xen_version
Date: Mon, 16 Jan 2023 21:57:24 +0000 [thread overview]
Message-ID: <20230116215805.1123514-11-dwmw2@infradead.org> (raw)
In-Reply-To: <20230116215805.1123514-1-dwmw2@infradead.org>
From: Joao Martins <joao.m.martins@oracle.com>
This is just meant to serve as an example on how we can implement
hypercalls. xen_version specifically since Qemu does all kind of
feature controllability. So handling that here seems appropriate.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
[dwmw2: Implement kvm_gva_rw() safely]
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
---
target/i386/kvm/xen-emu.c | 86 +++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index 476f464ee2..1dea6feb90 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -14,9 +14,55 @@
#include "sysemu/kvm_int.h"
#include "sysemu/kvm_xen.h"
#include "kvm/kvm_i386.h"
+#include "exec/address-spaces.h"
#include "xen-emu.h"
#include "trace.h"
+#include "standard-headers/xen/version.h"
+
+static int kvm_gva_rw(CPUState *cs, uint64_t gva, void *_buf, size_t sz,
+ bool is_write)
+{
+ uint8_t *buf = (uint8_t *)_buf;
+ int ret;
+
+ while (sz) {
+ struct kvm_translation tr = {
+ .linear_address = gva,
+ };
+
+ size_t len = TARGET_PAGE_SIZE - (tr.linear_address & ~TARGET_PAGE_MASK);
+ if (len > sz) {
+ len = sz;
+ }
+
+ ret = kvm_vcpu_ioctl(cs, KVM_TRANSLATE, &tr);
+ if (ret || !tr.valid || (is_write && !tr.writeable)) {
+ return -EFAULT;
+ }
+
+ cpu_physical_memory_rw(tr.physical_address, buf, len, is_write);
+
+ buf += len;
+ sz -= len;
+ gva += len;
+ }
+
+ return 0;
+}
+
+static inline int kvm_copy_from_gva(CPUState *cs, uint64_t gva, void *buf,
+ size_t sz)
+{
+ return kvm_gva_rw(cs, gva, buf, sz, false);
+}
+
+static inline int kvm_copy_to_gva(CPUState *cs, uint64_t gva, void *buf,
+ size_t sz)
+{
+ return kvm_gva_rw(cs, gva, buf, sz, true);
+}
+
int kvm_xen_init(KVMState *s, uint32_t hypercall_msr)
{
const int required_caps = KVM_XEN_HVM_CONFIG_HYPERCALL_MSR |
@@ -87,6 +133,43 @@ uint32_t kvm_xen_get_caps(void)
return kvm_state->xen_caps;
}
+static bool kvm_xen_hcall_xen_version(struct kvm_xen_exit *exit, X86CPU *cpu,
+ int cmd, uint64_t arg)
+{
+ int err = 0;
+
+ switch (cmd) {
+ case XENVER_get_features: {
+ struct xen_feature_info fi;
+
+ /* No need for 32/64 compat handling */
+ qemu_build_assert(sizeof(fi) == 8);
+
+ err = kvm_copy_from_gva(CPU(cpu), arg, &fi, sizeof(fi));
+ if (err) {
+ break;
+ }
+
+ fi.submap = 0;
+ if (fi.submap_idx == 0) {
+ fi.submap |= 1 << XENFEAT_writable_page_tables |
+ 1 << XENFEAT_writable_descriptor_tables |
+ 1 << XENFEAT_auto_translated_physmap |
+ 1 << XENFEAT_supervisor_mode_kernel;
+ }
+
+ err = kvm_copy_to_gva(CPU(cpu), arg, &fi, sizeof(fi));
+ break;
+ }
+
+ default:
+ return false;
+ }
+
+ exit->u.hcall.result = err;
+ return true;
+}
+
static bool do_kvm_xen_handle_exit(X86CPU *cpu, struct kvm_xen_exit *exit)
{
uint16_t code = exit->u.hcall.input;
@@ -97,6 +180,9 @@ static bool do_kvm_xen_handle_exit(X86CPU *cpu, struct kvm_xen_exit *exit)
}
switch (code) {
+ case __HYPERVISOR_xen_version:
+ return kvm_xen_hcall_xen_version(exit, cpu, exit->u.hcall.params[0],
+ exit->u.hcall.params[1]);
default:
return false;
}
--
2.39.0
next prev parent reply other threads:[~2023-01-16 22:04 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-16 21:57 [PATCH v7 00/51] Xen support under KVM David Woodhouse
2023-01-16 21:57 ` [PATCH v7 01/51] include: import Xen public headers to include/standard-headers/ David Woodhouse
2023-01-19 13:02 ` Alex Bennée
2023-01-19 15:06 ` David Woodhouse
2023-01-16 21:57 ` [PATCH v7 02/51] xen: add CONFIG_XENFV_MACHINE and CONFIG_XEN_EMU options for Xen emulation David Woodhouse
2023-01-16 21:57 ` [PATCH v7 03/51] xen: Add XEN_DISABLED mode and make it default David Woodhouse
2023-01-16 21:57 ` [PATCH v7 04/51] i386/kvm: Add xen-version KVM accelerator property and init KVM Xen support David Woodhouse
2023-01-16 21:57 ` [PATCH v7 05/51] i386/kvm: handle Xen HVM cpuid leaves David Woodhouse
2023-01-16 21:57 ` [PATCH v7 06/51] i386/hvm: Set Xen vCPU ID in KVM David Woodhouse
2023-01-16 21:57 ` [PATCH v7 07/51] xen-platform: exclude vfio-pci from the PCI platform unplug David Woodhouse
2023-01-16 21:57 ` [PATCH v7 08/51] xen-platform: allow its creation with XEN_EMULATE mode David Woodhouse
2023-01-17 9:44 ` Paul Durrant
2023-01-16 21:57 ` [PATCH v7 09/51] i386/xen: handle guest hypercalls David Woodhouse
2023-01-16 21:57 ` David Woodhouse [this message]
2023-01-16 21:57 ` [PATCH v7 11/51] i386/xen: implement HYPERVISOR_sched_op, SCHEDOP_shutdown David Woodhouse
2023-01-16 21:57 ` [PATCH v7 12/51] i386/xen: Implement SCHEDOP_poll and SCHEDOP_yield David Woodhouse
2023-01-16 21:57 ` [PATCH v7 13/51] hw/xen: Add xen_overlay device for emulating shared xenheap pages David Woodhouse
2023-01-16 21:57 ` [PATCH v7 14/51] i386/xen: add pc_machine_kvm_type to initialize XEN_EMULATE mode David Woodhouse
2023-01-17 9:47 ` Paul Durrant
2023-01-16 21:57 ` [PATCH v7 15/51] i386/xen: manage and save/restore Xen guest long_mode setting David Woodhouse
2023-01-16 21:57 ` [PATCH v7 16/51] i386/xen: implement HYPERVISOR_memory_op David Woodhouse
2023-01-16 21:57 ` [PATCH v7 17/51] i386/xen: implement XENMEM_add_to_physmap_batch David Woodhouse
2023-01-16 21:57 ` [PATCH v7 18/51] i386/xen: implement HYPERVISOR_hvm_op David Woodhouse
2023-01-16 21:57 ` [PATCH v7 19/51] i386/xen: implement HYPERVISOR_vcpu_op David Woodhouse
2023-01-16 21:57 ` [PATCH v7 20/51] i386/xen: handle VCPUOP_register_vcpu_info David Woodhouse
2023-01-16 21:57 ` [PATCH v7 21/51] i386/xen: handle VCPUOP_register_vcpu_time_info David Woodhouse
2023-01-16 21:57 ` [PATCH v7 22/51] i386/xen: handle VCPUOP_register_runstate_memory_area David Woodhouse
2023-01-16 21:57 ` [PATCH v7 23/51] i386/xen: implement HYPERVISOR_event_channel_op David Woodhouse
2023-01-17 9:53 ` Paul Durrant
2023-01-17 9:59 ` David Woodhouse
2023-01-16 21:57 ` [PATCH v7 24/51] i386/xen: implement HVMOP_set_evtchn_upcall_vector David Woodhouse
2023-01-16 21:57 ` [PATCH v7 25/51] i386/xen: implement HVMOP_set_param David Woodhouse
2023-01-16 21:57 ` [PATCH v7 26/51] hw/xen: Add xen_evtchn device for event channel emulation David Woodhouse
2023-01-17 10:00 ` Paul Durrant
2023-01-17 10:23 ` David Woodhouse
2023-01-17 10:56 ` Paul Durrant
2023-01-17 11:02 ` David Woodhouse
2023-01-17 11:06 ` Paul Durrant
2023-01-17 11:24 ` David Woodhouse
2023-01-17 11:53 ` Paul Durrant
2023-01-17 12:12 ` David Woodhouse
2023-01-17 13:01 ` [PATCH v7.1 " David Woodhouse
2023-01-16 21:57 ` [PATCH v7 27/51] i386/xen: Add support for Xen event channel delivery to vCPU David Woodhouse
2023-01-17 11:11 ` Paul Durrant
2023-01-17 12:31 ` David Woodhouse
2023-01-17 13:11 ` Paul Durrant
2023-01-17 12:01 ` Paul Durrant
2023-01-16 21:57 ` [PATCH v7 28/51] hw/xen: Implement EVTCHNOP_status David Woodhouse
2023-01-16 21:57 ` [PATCH v7 29/51] hw/xen: Implement EVTCHNOP_close David Woodhouse
2023-01-16 21:57 ` [PATCH v7 30/51] hw/xen: Implement EVTCHNOP_unmask David Woodhouse
2023-01-16 21:57 ` [PATCH v7 31/51] hw/xen: Implement EVTCHNOP_bind_virq David Woodhouse
2023-01-16 21:57 ` [PATCH v7 32/51] hw/xen: Implement EVTCHNOP_bind_ipi David Woodhouse
2023-01-16 21:57 ` [PATCH v7 33/51] hw/xen: Implement EVTCHNOP_send David Woodhouse
2023-01-16 21:57 ` [PATCH v7 34/51] hw/xen: Implement EVTCHNOP_alloc_unbound David Woodhouse
2023-01-16 21:57 ` [PATCH v7 35/51] hw/xen: Implement EVTCHNOP_bind_interdomain David Woodhouse
2023-01-16 21:57 ` [PATCH v7 36/51] hw/xen: Implement EVTCHNOP_bind_vcpu David Woodhouse
2023-01-16 21:57 ` [PATCH v7 37/51] hw/xen: Implement EVTCHNOP_reset David Woodhouse
2023-01-16 21:57 ` [PATCH v7 38/51] i386/xen: add monitor commands to test event injection David Woodhouse
2023-01-17 10:08 ` Markus Armbruster
2023-01-17 10:41 ` David Woodhouse
2023-01-17 11:31 ` David Woodhouse
2023-01-19 11:01 ` David Woodhouse
2023-01-16 21:57 ` [PATCH v7 39/51] hw/xen: Support HVM_PARAM_CALLBACK_TYPE_GSI callback David Woodhouse
2023-01-16 21:57 ` [PATCH v7 40/51] hw/xen: Support HVM_PARAM_CALLBACK_TYPE_PCI_INTX callback David Woodhouse
2023-01-16 21:57 ` [PATCH v7 41/51] kvm/i386: Add xen-gnttab-max-frames property David Woodhouse
2023-01-16 21:57 ` [PATCH v7 42/51] hw/xen: Add xen_gnttab device for grant table emulation David Woodhouse
2023-01-16 21:57 ` [PATCH v7 43/51] hw/xen: Support mapping grant frames David Woodhouse
2023-01-16 21:57 ` [PATCH v7 44/51] i386/xen: Implement HYPERVISOR_grant_table_op and GNTTABOP_[gs]et_verson David Woodhouse
2023-01-16 21:57 ` [PATCH v7 45/51] hw/xen: Implement GNTTABOP_query_size David Woodhouse
2023-01-16 21:58 ` [PATCH v7 46/51] i386/xen: handle PV timer hypercalls David Woodhouse
2023-01-16 21:58 ` [PATCH v7 47/51] i386/xen: Reserve Xen special pages for console, xenstore rings David Woodhouse
2023-01-16 21:58 ` [PATCH v7 48/51] i386/xen: handle HVMOP_get_param David Woodhouse
2023-01-16 21:58 ` [PATCH v7 49/51] hw/xen: Add backend implementation of interdomain event channel support David Woodhouse
2023-01-16 21:58 ` [PATCH v7 50/51] hw/xen: Add xen_xenstore device for xenstore emulation David Woodhouse
2023-01-16 21:58 ` [PATCH v7 51/51] hw/xen: Add basic ring handling to xenstore David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 00/19] Emulated Xen PV backend and PIRQ support David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 01/19] hw/xen: Add evtchn operations to allow redirection to internal emulation David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 02/19] hw/xen: Add emulated evtchn ops David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 03/19] hw/xen: Add gnttab operations to allow redirection to internal emulation David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 04/19] hw/xen: Pass grant ref to gnttab unmap David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 05/19] hw/xen: Add foreignmem operations to allow redirection to internal emulation David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 06/19] hw/xen: Add xenstore " David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 07/19] hw/xen: Move xenstore_store_pv_console_info to xen_console.c David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 08/19] hw/xen: Use XEN_PAGE_SIZE in PV backend drivers David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 09/19] hw/xen: Rename xen_common.h to xen_native.h David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 10/19] hw/xen: Build PV backend drivers for XENFV_MACHINE David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 11/19] hw/xen: Map guest XENSTORE_PFN grant in emulated Xenstore David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 12/19] hw/xen: Add backend implementation of grant table operations David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 13/19] hw/xen: Implement soft reset for emulated gnttab David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 14/19] hw/xen: Remove old version of Xen headers David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 15/19] i386/xen: Initialize XenBus and legacy backends from pc_init1() David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 16/19] i386/xen: Implement HYPERVISOR_physdev_op David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 17/19] hw/xen: Implement emulated PIRQ hypercall support David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 18/19] hw/xen: Support GSI mapping to PIRQ David Woodhouse
2023-01-16 22:19 ` [RFC PATCH v7bis 19/19] hw/xen: Support MSI " David Woodhouse
2023-01-17 16:01 ` [PATCH v7 52/51] hw/xen: Automatically add xen-platform PCI device for emulated Xen guests David Woodhouse
2023-01-17 16:02 ` [PATCH v7 53/51] i386/xen: Document Xen HVM emulation David Woodhouse
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230116215805.1123514-11-dwmw2@infradead.org \
--to=dwmw2@infradead.org \
--cc=alex.bennee@linaro.org \
--cc=ankur.a.arora@oracle.com \
--cc=armbru@redhat.com \
--cc=cfontana@suse.de \
--cc=dgilbert@redhat.com \
--cc=joao.m.martins@oracle.com \
--cc=julien@xen.org \
--cc=marcel.apfelbaum@gmail.com \
--cc=mst@redhat.com \
--cc=paul@xen.org \
--cc=pbonzini@redhat.com \
--cc=philmd@linaro.org \
--cc=qemu-devel@nongnu.org \
--cc=quintela@redhat.com \
--cc=thuth@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).