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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [XEN][RFC PATCH V2 01/17] hvm: Modify interface to support multiple ioreq server
Add structure to handle ioreq server. It's a server which can
handle a range of IO (MMIO and/or PIO) and emulate a PCI device.
Each server has its own shared page to receive ioreq. So
we have introduced to HVM PARAM to set/get the first and
the last shared page used for ioreq. With this id, the server
is able to retrieve its page.
Introduce a new kind of ioreq type IOREQ_TYPE_PCICONFIG
which permits to forward easily PCI config space access.
Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
xen/include/asm-x86/hvm/domain.h | 25 ++++++++++++++++++-
xen/include/asm-x86/hvm/vcpu.h | 4 ++-
xen/include/public/hvm/hvm_op.h | 51 ++++++++++++++++++++++++++++++++++++++
xen/include/public/hvm/ioreq.h | 1 +
xen/include/public/hvm/params.h | 6 +++-
xen/include/public/xen.h | 1 +
xen/include/xen/hvm/pci_emul.h | 29 +++++++++++++++++++++
7 files changed, 114 insertions(+), 3 deletions(-)
create mode 100644 xen/include/xen/hvm/pci_emul.h
diff --git a/xen/include/asm-x86/hvm/domain.h b/xen/include/asm-x86/hvm/domain.h
index 27b3de5..49d1ca0 100644
--- a/xen/include/asm-x86/hvm/domain.h
+++ b/xen/include/asm-x86/hvm/domain.h
@@ -28,6 +28,7 @@
#include <asm/hvm/vioapic.h>
#include <asm/hvm/io.h>
#include <xen/hvm/iommu.h>
+#include <xen/hvm/pci_emul.h>
#include <asm/hvm/viridian.h>
#include <asm/hvm/vmx/vmcs.h>
#include <asm/hvm/svm/vmcb.h>
@@ -41,14 +42,36 @@ struct hvm_ioreq_page {
void *va;
};
+struct hvm_io_range {
+ uint64_t s, e;
+ struct hvm_io_range *next;
+};
+
+struct hvm_ioreq_server {
+ unsigned int id;
+ domid_t domid;
+ struct hvm_io_range *mmio_range_list;
+ struct hvm_io_range *portio_range_list;
+ struct hvm_ioreq_server *next;
+ struct hvm_ioreq_page ioreq;
+ struct hvm_ioreq_page buf_ioreq;
+ unsigned int buf_ioreq_evtchn;
+};
+
struct hvm_domain {
+ /* Use for the IO handles by Xen */
struct hvm_ioreq_page ioreq;
- struct hvm_ioreq_page buf_ioreq;
+ struct hvm_ioreq_server *ioreq_server_list;
+ uint32_t nr_ioreq_server;
+ spinlock_t ioreq_server_lock;
struct pl_time pl_time;
struct hvm_io_handler *io_handler;
+ /* PCI Information */
+ struct pci_root_emul pci_root;
+
/* Lock protects access to irq, vpic and vioapic. */
spinlock_t irq_lock;
struct hvm_irq irq;
diff --git a/xen/include/asm-x86/hvm/vcpu.h b/xen/include/asm-x86/hvm/vcpu.h
index 9d68ed2..812b16e 100644
--- a/xen/include/asm-x86/hvm/vcpu.h
+++ b/xen/include/asm-x86/hvm/vcpu.h
@@ -125,7 +125,9 @@ struct hvm_vcpu {
spinlock_t tm_lock;
struct list_head tm_list;
- int xen_port;
+ struct hvm_ioreq_page *ioreq;
+ /* PCI Information */
+ uint32_t pci_cf8;
bool_t flag_dr_dirty;
bool_t debug_state_latch;
diff --git a/xen/include/public/hvm/hvm_op.h b/xen/include/public/hvm/hvm_op.h
index a9aab4b..6b17c5f 100644
--- a/xen/include/public/hvm/hvm_op.h
+++ b/xen/include/public/hvm/hvm_op.h
@@ -23,6 +23,9 @@
#include "../xen.h"
#include "../trace.h"
+#include "../event_channel.h"
+
+#include "hvm_info_table.h" /* HVM_MAX_VCPUS */
/* Get/set subcommands: extra argument == pointer to xen_hvm_param struct. */
#define HVMOP_set_param 0
@@ -238,6 +241,54 @@ struct xen_hvm_inject_trap {
typedef struct xen_hvm_inject_trap xen_hvm_inject_trap_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_inject_trap_t);
+#define HVMOP_register_ioreq_server 20
+struct xen_hvm_register_ioreq_server {
+ domid_t domid; /* IN - domain to be serviced */
+ ioservid_t id; /* OUT - handle for identifying this server */
+};
+typedef struct xen_hvm_register_ioreq_server xen_hvm_register_ioreq_server_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_register_ioreq_server_t);
+
+#define HVMOP_get_ioreq_server_buf_channel 21
+struct xen_hvm_get_ioreq_server_buf_channel {
+ domid_t domid; /* IN - domain to be serviced */
+ ioservid_t id; /* IN - handle from HVMOP_register_ioreq_server
*/
+ evtchn_port_t channel; /* OUT - buf ioreq channel */
+};
+typedef struct xen_hvm_get_ioreq_server_buf_channel
xen_hvm_get_ioreq_server_buf_channel_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_get_ioreq_server_buf_channel_t);
+
+#define HVMOP_map_io_range_to_ioreq_server 22
+struct xen_hvm_map_io_range_to_ioreq_server {
+ domid_t domid; /* IN - domain to be serviced */
+ int is_mmio; /* IN - MMIO or port IO? */
+ ioservid_t id; /* IN - handle from HVMOP_register_ioreq_server */
+ uint64_aligned_t s, e; /* IN - inclusive start and end of range */
+};
+typedef struct xen_hvm_map_io_range_to_ioreq_server
xen_hvm_map_io_range_to_ioreq_server_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_map_io_range_to_ioreq_server_t);
+
+#define HVMOP_unmap_io_range_from_ioreq_server 23
+struct xen_hvm_unmap_io_range_from_ioreq_server {
+ domid_t domid; /* IN - domain to be serviced */
+ uint8_t is_mmio; /* IN - MMIO or port IO? */
+ ioservid_t id; /* IN - handle from HVMOP_register_ioreq_server */
+ uint64_aligned_t addr; /* IN - address inside the range to remove */
+};
+typedef struct xen_hvm_unmap_io_range_from_ioreq_server
xen_hvm_unmap_io_range_from_ioreq_server_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_unmap_io_range_from_ioreq_server_t);
+
+#define HVMOP_register_pcidev 24
+struct xen_hvm_register_pcidev {
+ domid_t domid; /* IN - domain to be serviced */
+ ioservid_t id; /* IN - handle from HVMOP_register_ioreq_server */
+ /* IN - PCI identification in PCI topology (domain:bus:device:function) */
+ uint8_t domain, bus, device, function;
+};
+typedef struct xen_hvm_register_pcidev xen_hvm_register_pcidev_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_register_pcidev_t);
+
+
#endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */
#define HVMOP_get_mem_type 15
diff --git a/xen/include/public/hvm/ioreq.h b/xen/include/public/hvm/ioreq.h
index 4022a1d..87aacd3 100644
--- a/xen/include/public/hvm/ioreq.h
+++ b/xen/include/public/hvm/ioreq.h
@@ -34,6 +34,7 @@
#define IOREQ_TYPE_PIO 0 /* pio */
#define IOREQ_TYPE_COPY 1 /* mmio ops */
+#define IOREQ_TYPE_PCI_CONFIG 2 /* pci config space ops */
#define IOREQ_TYPE_TIMEOFFSET 7
#define IOREQ_TYPE_INVALIDATE 8 /* mapcache */
diff --git a/xen/include/public/hvm/params.h b/xen/include/public/hvm/params.h
index 55c1b57..309ac1b 100644
--- a/xen/include/public/hvm/params.h
+++ b/xen/include/public/hvm/params.h
@@ -147,6 +147,10 @@
#define HVM_PARAM_ACCESS_RING_PFN 28
#define HVM_PARAM_SHARING_RING_PFN 29
-#define HVM_NR_PARAMS 30
+/* Param for ioreq servers */
+#define HVM_PARAM_IO_PFN_FIRST 30
+#define HVM_PARAM_IO_PFN_LAST 31
+
+#define HVM_NR_PARAMS 32
#endif /* __XEN_PUBLIC_HVM_PARAMS_H__ */
diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
index b2f6c50..0de17b2 100644
--- a/xen/include/public/xen.h
+++ b/xen/include/public/xen.h
@@ -466,6 +466,7 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
#ifndef __ASSEMBLY__
typedef uint16_t domid_t;
+typedef uint32_t ioservid_t;
/* Domain ids >= DOMID_FIRST_RESERVED cannot be used for ordinary domains. */
#define DOMID_FIRST_RESERVED (0x7FF0U)
diff --git a/xen/include/xen/hvm/pci_emul.h b/xen/include/xen/hvm/pci_emul.h
new file mode 100644
index 0000000..4dfb577
--- /dev/null
+++ b/xen/include/xen/hvm/pci_emul.h
@@ -0,0 +1,29 @@
+#ifndef PCI_EMUL_H_
+# define PCI_EMUL_H_
+
+# include <xen/radix-tree.h>
+# include <xen/spinlock.h>
+# include <xen/types.h>
+
+void hvm_init_pci_emul(struct domain *d);
+void hvm_destroy_pci_emul(struct domain *d);
+int hvm_register_pcidev(domid_t domid, ioservid_t id,
+ uint8_t domain, uint8_t bus,
+ uint8_t device, uint8_t function);
+
+struct pci_root_emul {
+ spinlock_t pci_lock;
+ struct radix_tree_root pci_list;
+};
+
+#endif /* !PCI_EMUL_H_ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
--
Julien Grall
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