xen-hvm: reorganize xen-hvm and move common function to xen-hvm-common
This patch does following:
1. creates arch_handle_ioreq() and arch_xen_set_memory(). This is done in
preparation for moving most of xen-hvm code to an arch-neutral location,
move the x86-specific portion of xen_set_memory to arch_xen_set_memory.
Also, move handle_vmport_ioreq to arch_handle_ioreq.
2. Pure code movement: move common functions to hw/xen/xen-hvm-common.c
Extract common functionalities from hw/i386/xen/xen-hvm.c and move them to
hw/xen/xen-hvm-common.c. These common functions are useful for creating
an IOREQ server.
xen_hvm_init_pc() contains the architecture independent code for creating
and mapping a IOREQ server, connecting memory and IO listeners, initializing
a xen bus and registering backends. Moved this common xen code to a new
function xen_register_ioreq() which can be used by both x86 and ARM machines.
Following functions are moved to hw/xen/xen-hvm-common.c:
xen_vcpu_eport(), xen_vcpu_ioreq(), xen_ram_alloc(), xen_set_memory(),
xen_region_add(), xen_region_del(), xen_io_add(), xen_io_del(),
xen_device_realize(), xen_device_unrealize(),
cpu_get_ioreq_from_shared_memory(), cpu_get_ioreq(), do_inp(),
do_outp(), rw_phys_req_item(), read_phys_req_item(),
write_phys_req_item(), cpu_ioreq_pio(), cpu_ioreq_move(),
cpu_ioreq_config(), handle_ioreq(), handle_buffered_iopage(),
handle_buffered_io(), cpu_handle_ioreq(), xen_main_loop_prepare(),
xen_hvm_change_state_handler(), xen_exit_notifier(),
xen_map_ioreq_server(), destroy_hvm_domain() and
xen_shutdown_fatal_error()
3. Removed static type from below functions:
1. xen_region_add()
2. xen_region_del()
3. xen_io_add()
4. xen_io_del()
5. xen_device_realize()
6. xen_device_unrealize()
7. xen_hvm_change_state_handler()
8. cpu_ioreq_pio()
9. xen_exit_notifier()
4. Replace TARGET_PAGE_SIZE with XC_PAGE_SIZE to match the page side with Xen.
Signed-off-by: Vikram Garhwal <vikram.garhwal@amd.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@amd.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
This commit is contained in:
Stefano Stabellini
parent
9269b9d188
commit
f17068c1c7
@ -7,17 +7,3 @@ xen_platform_log(char *s) "xen platform: %s"
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xen_pv_mmio_read(uint64_t addr) "WARNING: read from Xen PV Device MMIO space (address 0x%"PRIx64")"
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xen_pv_mmio_write(uint64_t addr) "WARNING: write to Xen PV Device MMIO space (address 0x%"PRIx64")"
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# xen-hvm.c
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xen_ram_alloc(unsigned long ram_addr, unsigned long size) "requested: 0x%lx, size 0x%lx"
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xen_client_set_memory(uint64_t start_addr, unsigned long size, bool log_dirty) "0x%"PRIx64" size 0x%lx, log_dirty %i"
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handle_ioreq(void *req, uint32_t type, uint32_t dir, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p type=%d dir=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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handle_ioreq_read(void *req, uint32_t type, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p read type=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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handle_ioreq_write(void *req, uint32_t type, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p write type=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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cpu_ioreq_pio(void *req, uint32_t dir, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p pio dir=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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cpu_ioreq_pio_read_reg(void *req, uint64_t data, uint64_t addr, uint32_t size) "I/O=%p pio read reg data=0x%"PRIx64" port=0x%"PRIx64" size=%d"
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cpu_ioreq_pio_write_reg(void *req, uint64_t data, uint64_t addr, uint32_t size) "I/O=%p pio write reg data=0x%"PRIx64" port=0x%"PRIx64" size=%d"
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cpu_ioreq_move(void *req, uint32_t dir, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p copy dir=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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xen_map_resource_ioreq(uint32_t id, void *addr) "id: %u addr: %p"
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cpu_ioreq_config_read(void *req, uint32_t sbdf, uint32_t reg, uint32_t size, uint32_t data) "I/O=%p sbdf=0x%x reg=%u size=%u data=0x%x"
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cpu_ioreq_config_write(void *req, uint32_t sbdf, uint32_t reg, uint32_t size, uint32_t data) "I/O=%p sbdf=0x%x reg=%u size=%u data=0x%x"
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File diff suppressed because it is too large
Load Diff
@ -29,4 +29,7 @@ specific_ss.add_all(when: ['CONFIG_XEN', xen], if_true: xen_specific_ss)
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xen_ss = ss.source_set()
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xen_ss.add(when: 'CONFIG_XEN', if_true: files('xen-mapcache.c'))
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xen_ss.add(when: 'CONFIG_XEN', if_true: files(
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'xen-mapcache.c',
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'xen-hvm-common.c',
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))
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@ -42,6 +42,20 @@ xs_node_vscanf(char *path, char *value) "%s %s"
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xs_node_watch(char *path) "%s"
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xs_node_unwatch(char *path) "%s"
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# xen-hvm.c
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xen_ram_alloc(unsigned long ram_addr, unsigned long size) "requested: 0x%lx, size 0x%lx"
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xen_client_set_memory(uint64_t start_addr, unsigned long size, bool log_dirty) "0x%"PRIx64" size 0x%lx, log_dirty %i"
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handle_ioreq(void *req, uint32_t type, uint32_t dir, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p type=%d dir=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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handle_ioreq_read(void *req, uint32_t type, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p read type=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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handle_ioreq_write(void *req, uint32_t type, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p write type=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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cpu_ioreq_pio(void *req, uint32_t dir, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p pio dir=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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cpu_ioreq_pio_read_reg(void *req, uint64_t data, uint64_t addr, uint32_t size) "I/O=%p pio read reg data=0x%"PRIx64" port=0x%"PRIx64" size=%d"
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cpu_ioreq_pio_write_reg(void *req, uint64_t data, uint64_t addr, uint32_t size) "I/O=%p pio write reg data=0x%"PRIx64" port=0x%"PRIx64" size=%d"
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cpu_ioreq_move(void *req, uint32_t dir, uint32_t df, uint32_t data_is_ptr, uint64_t addr, uint64_t data, uint32_t count, uint32_t size) "I/O=%p copy dir=%d df=%d ptr=%d port=0x%"PRIx64" data=0x%"PRIx64" count=%d size=%d"
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xen_map_resource_ioreq(uint32_t id, void *addr) "id: %u addr: %p"
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cpu_ioreq_config_read(void *req, uint32_t sbdf, uint32_t reg, uint32_t size, uint32_t data) "I/O=%p sbdf=0x%x reg=%u size=%u data=0x%x"
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cpu_ioreq_config_write(void *req, uint32_t sbdf, uint32_t reg, uint32_t size, uint32_t data) "I/O=%p sbdf=0x%x reg=%u size=%u data=0x%x"
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# xen-mapcache.c
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xen_map_cache(uint64_t phys_addr) "want 0x%"PRIx64
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xen_remap_bucket(uint64_t index) "index 0x%"PRIx64
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860
hw/xen/xen-hvm-common.c
Normal file
860
hw/xen/xen-hvm-common.c
Normal file
@ -0,0 +1,860 @@
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "qapi/error.h"
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#include "trace.h"
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#include "hw/pci/pci_host.h"
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#include "hw/xen/xen-hvm-common.h"
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#include "hw/xen/xen-bus.h"
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#include "hw/boards.h"
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#include "hw/xen/arch_hvm.h"
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MemoryRegion ram_memory;
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void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr,
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Error **errp)
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{
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unsigned long nr_pfn;
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xen_pfn_t *pfn_list;
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int i;
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if (runstate_check(RUN_STATE_INMIGRATE)) {
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/* RAM already populated in Xen */
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fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT
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" bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n",
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__func__, size, ram_addr);
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return;
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}
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if (mr == &ram_memory) {
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return;
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}
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trace_xen_ram_alloc(ram_addr, size);
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nr_pfn = size >> TARGET_PAGE_BITS;
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pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn);
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for (i = 0; i < nr_pfn; i++) {
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pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i;
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}
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if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) {
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error_setg(errp, "xen: failed to populate ram at " RAM_ADDR_FMT,
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ram_addr);
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}
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g_free(pfn_list);
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}
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static void xen_set_memory(struct MemoryListener *listener,
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MemoryRegionSection *section,
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bool add)
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{
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XenIOState *state = container_of(listener, XenIOState, memory_listener);
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if (section->mr == &ram_memory) {
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return;
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} else {
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if (add) {
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xen_map_memory_section(xen_domid, state->ioservid,
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section);
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} else {
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xen_unmap_memory_section(xen_domid, state->ioservid,
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section);
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}
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}
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arch_xen_set_memory(state, section, add);
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}
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void xen_region_add(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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memory_region_ref(section->mr);
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xen_set_memory(listener, section, true);
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}
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void xen_region_del(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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xen_set_memory(listener, section, false);
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memory_region_unref(section->mr);
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}
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void xen_io_add(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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XenIOState *state = container_of(listener, XenIOState, io_listener);
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MemoryRegion *mr = section->mr;
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if (mr->ops == &unassigned_io_ops) {
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return;
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}
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memory_region_ref(mr);
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xen_map_io_section(xen_domid, state->ioservid, section);
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}
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void xen_io_del(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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XenIOState *state = container_of(listener, XenIOState, io_listener);
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MemoryRegion *mr = section->mr;
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if (mr->ops == &unassigned_io_ops) {
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return;
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}
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xen_unmap_io_section(xen_domid, state->ioservid, section);
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memory_region_unref(mr);
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}
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void xen_device_realize(DeviceListener *listener,
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DeviceState *dev)
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{
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XenIOState *state = container_of(listener, XenIOState, device_listener);
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if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
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PCIDevice *pci_dev = PCI_DEVICE(dev);
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XenPciDevice *xendev = g_new(XenPciDevice, 1);
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xendev->pci_dev = pci_dev;
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xendev->sbdf = PCI_BUILD_BDF(pci_dev_bus_num(pci_dev),
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pci_dev->devfn);
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QLIST_INSERT_HEAD(&state->dev_list, xendev, entry);
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xen_map_pcidev(xen_domid, state->ioservid, pci_dev);
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}
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}
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void xen_device_unrealize(DeviceListener *listener,
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DeviceState *dev)
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{
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XenIOState *state = container_of(listener, XenIOState, device_listener);
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if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
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PCIDevice *pci_dev = PCI_DEVICE(dev);
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XenPciDevice *xendev, *next;
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xen_unmap_pcidev(xen_domid, state->ioservid, pci_dev);
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QLIST_FOREACH_SAFE(xendev, &state->dev_list, entry, next) {
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if (xendev->pci_dev == pci_dev) {
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QLIST_REMOVE(xendev, entry);
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g_free(xendev);
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break;
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}
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}
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}
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}
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MemoryListener xen_io_listener = {
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.name = "xen-io",
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.region_add = xen_io_add,
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.region_del = xen_io_del,
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.priority = 10,
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};
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DeviceListener xen_device_listener = {
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.realize = xen_device_realize,
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.unrealize = xen_device_unrealize,
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};
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/* get the ioreq packets from share mem */
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static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu)
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{
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ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu);
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if (req->state != STATE_IOREQ_READY) {
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DPRINTF("I/O request not ready: "
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"%x, ptr: %x, port: %"PRIx64", "
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"data: %"PRIx64", count: %u, size: %u\n",
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req->state, req->data_is_ptr, req->addr,
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req->data, req->count, req->size);
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return NULL;
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}
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xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
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req->state = STATE_IOREQ_INPROCESS;
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return req;
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}
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/* use poll to get the port notification */
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/* ioreq_vec--out,the */
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/* retval--the number of ioreq packet */
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static ioreq_t *cpu_get_ioreq(XenIOState *state)
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{
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MachineState *ms = MACHINE(qdev_get_machine());
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unsigned int max_cpus = ms->smp.max_cpus;
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int i;
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evtchn_port_t port;
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port = qemu_xen_evtchn_pending(state->xce_handle);
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if (port == state->bufioreq_local_port) {
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timer_mod(state->buffered_io_timer,
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BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
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return NULL;
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}
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if (port != -1) {
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for (i = 0; i < max_cpus; i++) {
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if (state->ioreq_local_port[i] == port) {
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break;
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}
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}
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if (i == max_cpus) {
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hw_error("Fatal error while trying to get io event!\n");
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}
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/* unmask the wanted port again */
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qemu_xen_evtchn_unmask(state->xce_handle, port);
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/* get the io packet from shared memory */
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state->send_vcpu = i;
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return cpu_get_ioreq_from_shared_memory(state, i);
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}
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/* read error or read nothing */
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return NULL;
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}
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static uint32_t do_inp(uint32_t addr, unsigned long size)
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{
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switch (size) {
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case 1:
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return cpu_inb(addr);
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case 2:
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return cpu_inw(addr);
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case 4:
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return cpu_inl(addr);
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default:
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hw_error("inp: bad size: %04x %lx", addr, size);
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}
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}
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static void do_outp(uint32_t addr,
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unsigned long size, uint32_t val)
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{
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switch (size) {
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case 1:
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return cpu_outb(addr, val);
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case 2:
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return cpu_outw(addr, val);
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case 4:
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return cpu_outl(addr, val);
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default:
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hw_error("outp: bad size: %04x %lx", addr, size);
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}
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}
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/*
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* Helper functions which read/write an object from/to physical guest
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* memory, as part of the implementation of an ioreq.
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*
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* Equivalent to
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* cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
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* val, req->size, 0/1)
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* except without the integer overflow problems.
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*/
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static void rw_phys_req_item(hwaddr addr,
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ioreq_t *req, uint32_t i, void *val, int rw)
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{
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/* Do everything unsigned so overflow just results in a truncated result
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* and accesses to undesired parts of guest memory, which is up
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* to the guest */
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hwaddr offset = (hwaddr)req->size * i;
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if (req->df) {
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addr -= offset;
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} else {
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addr += offset;
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}
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cpu_physical_memory_rw(addr, val, req->size, rw);
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}
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static inline void read_phys_req_item(hwaddr addr,
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ioreq_t *req, uint32_t i, void *val)
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{
|
||||
rw_phys_req_item(addr, req, i, val, 0);
|
||||
}
|
||||
static inline void write_phys_req_item(hwaddr addr,
|
||||
ioreq_t *req, uint32_t i, void *val)
|
||||
{
|
||||
rw_phys_req_item(addr, req, i, val, 1);
|
||||
}
|
||||
|
||||
|
||||
void cpu_ioreq_pio(ioreq_t *req)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
trace_cpu_ioreq_pio(req, req->dir, req->df, req->data_is_ptr, req->addr,
|
||||
req->data, req->count, req->size);
|
||||
|
||||
if (req->size > sizeof(uint32_t)) {
|
||||
hw_error("PIO: bad size (%u)", req->size);
|
||||
}
|
||||
|
||||
if (req->dir == IOREQ_READ) {
|
||||
if (!req->data_is_ptr) {
|
||||
req->data = do_inp(req->addr, req->size);
|
||||
trace_cpu_ioreq_pio_read_reg(req, req->data, req->addr,
|
||||
req->size);
|
||||
} else {
|
||||
uint32_t tmp;
|
||||
|
||||
for (i = 0; i < req->count; i++) {
|
||||
tmp = do_inp(req->addr, req->size);
|
||||
write_phys_req_item(req->data, req, i, &tmp);
|
||||
}
|
||||
}
|
||||
} else if (req->dir == IOREQ_WRITE) {
|
||||
if (!req->data_is_ptr) {
|
||||
trace_cpu_ioreq_pio_write_reg(req, req->data, req->addr,
|
||||
req->size);
|
||||
do_outp(req->addr, req->size, req->data);
|
||||
} else {
|
||||
for (i = 0; i < req->count; i++) {
|
||||
uint32_t tmp = 0;
|
||||
|
||||
read_phys_req_item(req->data, req, i, &tmp);
|
||||
do_outp(req->addr, req->size, tmp);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void cpu_ioreq_move(ioreq_t *req)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
trace_cpu_ioreq_move(req, req->dir, req->df, req->data_is_ptr, req->addr,
|
||||
req->data, req->count, req->size);
|
||||
|
||||
if (req->size > sizeof(req->data)) {
|
||||
hw_error("MMIO: bad size (%u)", req->size);
|
||||
}
|
||||
|
||||
if (!req->data_is_ptr) {
|
||||
if (req->dir == IOREQ_READ) {
|
||||
for (i = 0; i < req->count; i++) {
|
||||
read_phys_req_item(req->addr, req, i, &req->data);
|
||||
}
|
||||
} else if (req->dir == IOREQ_WRITE) {
|
||||
for (i = 0; i < req->count; i++) {
|
||||
write_phys_req_item(req->addr, req, i, &req->data);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
uint64_t tmp;
|
||||
|
||||
if (req->dir == IOREQ_READ) {
|
||||
for (i = 0; i < req->count; i++) {
|
||||
read_phys_req_item(req->addr, req, i, &tmp);
|
||||
write_phys_req_item(req->data, req, i, &tmp);
|
||||
}
|
||||
} else if (req->dir == IOREQ_WRITE) {
|
||||
for (i = 0; i < req->count; i++) {
|
||||
read_phys_req_item(req->data, req, i, &tmp);
|
||||
write_phys_req_item(req->addr, req, i, &tmp);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void cpu_ioreq_config(XenIOState *state, ioreq_t *req)
|
||||
{
|
||||
uint32_t sbdf = req->addr >> 32;
|
||||
uint32_t reg = req->addr;
|
||||
XenPciDevice *xendev;
|
||||
|
||||
if (req->size != sizeof(uint8_t) && req->size != sizeof(uint16_t) &&
|
||||
req->size != sizeof(uint32_t)) {
|
||||
hw_error("PCI config access: bad size (%u)", req->size);
|
||||
}
|
||||
|
||||
if (req->count != 1) {
|
||||
hw_error("PCI config access: bad count (%u)", req->count);
|
||||
}
|
||||
|
||||
QLIST_FOREACH(xendev, &state->dev_list, entry) {
|
||||
if (xendev->sbdf != sbdf) {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!req->data_is_ptr) {
|
||||
if (req->dir == IOREQ_READ) {
|
||||
req->data = pci_host_config_read_common(
|
||||
xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE,
|
||||
req->size);
|
||||
trace_cpu_ioreq_config_read(req, xendev->sbdf, reg,
|
||||
req->size, req->data);
|
||||
} else if (req->dir == IOREQ_WRITE) {
|
||||
trace_cpu_ioreq_config_write(req, xendev->sbdf, reg,
|
||||
req->size, req->data);
|
||||
pci_host_config_write_common(
|
||||
xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE,
|
||||
req->data, req->size);
|
||||
}
|
||||
} else {
|
||||
uint32_t tmp;
|
||||
|
||||
if (req->dir == IOREQ_READ) {
|
||||
tmp = pci_host_config_read_common(
|
||||
xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE,
|
||||
req->size);
|
||||
trace_cpu_ioreq_config_read(req, xendev->sbdf, reg,
|
||||
req->size, tmp);
|
||||
write_phys_req_item(req->data, req, 0, &tmp);
|
||||
} else if (req->dir == IOREQ_WRITE) {
|
||||
read_phys_req_item(req->data, req, 0, &tmp);
|
||||
trace_cpu_ioreq_config_write(req, xendev->sbdf, reg,
|
||||
req->size, tmp);
|
||||
pci_host_config_write_common(
|
||||
xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE,
|
||||
tmp, req->size);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void handle_ioreq(XenIOState *state, ioreq_t *req)
|
||||
{
|
||||
trace_handle_ioreq(req, req->type, req->dir, req->df, req->data_is_ptr,
|
||||
req->addr, req->data, req->count, req->size);
|
||||
|
||||
if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
|
||||
(req->size < sizeof (target_ulong))) {
|
||||
req->data &= ((target_ulong) 1 << (8 * req->size)) - 1;
|
||||
}
|
||||
|
||||
if (req->dir == IOREQ_WRITE)
|
||||
trace_handle_ioreq_write(req, req->type, req->df, req->data_is_ptr,
|
||||
req->addr, req->data, req->count, req->size);
|
||||
|
||||
switch (req->type) {
|
||||
case IOREQ_TYPE_PIO:
|
||||
cpu_ioreq_pio(req);
|
||||
break;
|
||||
case IOREQ_TYPE_COPY:
|
||||
cpu_ioreq_move(req);
|
||||
break;
|
||||
case IOREQ_TYPE_TIMEOFFSET:
|
||||
break;
|
||||
case IOREQ_TYPE_INVALIDATE:
|
||||
xen_invalidate_map_cache();
|
||||
break;
|
||||
case IOREQ_TYPE_PCI_CONFIG:
|
||||
cpu_ioreq_config(state, req);
|
||||
break;
|
||||
default:
|
||||
arch_handle_ioreq(state, req);
|
||||
}
|
||||
if (req->dir == IOREQ_READ) {
|
||||
trace_handle_ioreq_read(req, req->type, req->df, req->data_is_ptr,
|
||||
req->addr, req->data, req->count, req->size);
|
||||
}
|
||||
}
|
||||
|
||||
static bool handle_buffered_iopage(XenIOState *state)
|
||||
{
|
||||
buffered_iopage_t *buf_page = state->buffered_io_page;
|
||||
buf_ioreq_t *buf_req = NULL;
|
||||
bool handled_ioreq = false;
|
||||
ioreq_t req;
|
||||
int qw;
|
||||
|
||||
if (!buf_page) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
memset(&req, 0x00, sizeof(req));
|
||||
req.state = STATE_IOREQ_READY;
|
||||
req.count = 1;
|
||||
req.dir = IOREQ_WRITE;
|
||||
|
||||
for (;;) {
|
||||
uint32_t rdptr = buf_page->read_pointer, wrptr;
|
||||
|
||||
xen_rmb();
|
||||
wrptr = buf_page->write_pointer;
|
||||
xen_rmb();
|
||||
if (rdptr != buf_page->read_pointer) {
|
||||
continue;
|
||||
}
|
||||
if (rdptr == wrptr) {
|
||||
break;
|
||||
}
|
||||
buf_req = &buf_page->buf_ioreq[rdptr % IOREQ_BUFFER_SLOT_NUM];
|
||||
req.size = 1U << buf_req->size;
|
||||
req.addr = buf_req->addr;
|
||||
req.data = buf_req->data;
|
||||
req.type = buf_req->type;
|
||||
xen_rmb();
|
||||
qw = (req.size == 8);
|
||||
if (qw) {
|
||||
if (rdptr + 1 == wrptr) {
|
||||
hw_error("Incomplete quad word buffered ioreq");
|
||||
}
|
||||
buf_req = &buf_page->buf_ioreq[(rdptr + 1) %
|
||||
IOREQ_BUFFER_SLOT_NUM];
|
||||
req.data |= ((uint64_t)buf_req->data) << 32;
|
||||
xen_rmb();
|
||||
}
|
||||
|
||||
handle_ioreq(state, &req);
|
||||
|
||||
/* Only req.data may get updated by handle_ioreq(), albeit even that
|
||||
* should not happen as such data would never make it to the guest (we
|
||||
* can only usefully see writes here after all).
|
||||
*/
|
||||
assert(req.state == STATE_IOREQ_READY);
|
||||
assert(req.count == 1);
|
||||
assert(req.dir == IOREQ_WRITE);
|
||||
assert(!req.data_is_ptr);
|
||||
|
||||
qatomic_add(&buf_page->read_pointer, qw + 1);
|
||||
handled_ioreq = true;
|
||||
}
|
||||
|
||||
return handled_ioreq;
|
||||
}
|
||||
|
||||
static void handle_buffered_io(void *opaque)
|
||||
{
|
||||
XenIOState *state = opaque;
|
||||
|
||||
if (handle_buffered_iopage(state)) {
|
||||
timer_mod(state->buffered_io_timer,
|
||||
BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
|
||||
} else {
|
||||
timer_del(state->buffered_io_timer);
|
||||
qemu_xen_evtchn_unmask(state->xce_handle, state->bufioreq_local_port);
|
||||
}
|
||||
}
|
||||
|
||||
static void cpu_handle_ioreq(void *opaque)
|
||||
{
|
||||
XenIOState *state = opaque;
|
||||
ioreq_t *req = cpu_get_ioreq(state);
|
||||
|
||||
handle_buffered_iopage(state);
|
||||
if (req) {
|
||||
ioreq_t copy = *req;
|
||||
|
||||
xen_rmb();
|
||||
handle_ioreq(state, ©);
|
||||
req->data = copy.data;
|
||||
|
||||
if (req->state != STATE_IOREQ_INPROCESS) {
|
||||
fprintf(stderr, "Badness in I/O request ... not in service?!: "
|
||||
"%x, ptr: %x, port: %"PRIx64", "
|
||||
"data: %"PRIx64", count: %u, size: %u, type: %u\n",
|
||||
req->state, req->data_is_ptr, req->addr,
|
||||
req->data, req->count, req->size, req->type);
|
||||
destroy_hvm_domain(false);
|
||||
return;
|
||||
}
|
||||
|
||||
xen_wmb(); /* Update ioreq contents /then/ update state. */
|
||||
|
||||
/*
|
||||
* We do this before we send the response so that the tools
|
||||
* have the opportunity to pick up on the reset before the
|
||||
* guest resumes and does a hlt with interrupts disabled which
|
||||
* causes Xen to powerdown the domain.
|
||||
*/
|
||||
if (runstate_is_running()) {
|
||||
ShutdownCause request;
|
||||
|
||||
if (qemu_shutdown_requested_get()) {
|
||||
destroy_hvm_domain(false);
|
||||
}
|
||||
request = qemu_reset_requested_get();
|
||||
if (request) {
|
||||
qemu_system_reset(request);
|
||||
destroy_hvm_domain(true);
|
||||
}
|
||||
}
|
||||
|
||||
req->state = STATE_IORESP_READY;
|
||||
qemu_xen_evtchn_notify(state->xce_handle,
|
||||
state->ioreq_local_port[state->send_vcpu]);
|
||||
}
|
||||
}
|
||||
|
||||
static void xen_main_loop_prepare(XenIOState *state)
|
||||
{
|
||||
int evtchn_fd = -1;
|
||||
|
||||
if (state->xce_handle != NULL) {
|
||||
evtchn_fd = qemu_xen_evtchn_fd(state->xce_handle);
|
||||
}
|
||||
|
||||
state->buffered_io_timer = timer_new_ms(QEMU_CLOCK_REALTIME, handle_buffered_io,
|
||||
state);
|
||||
|
||||
if (evtchn_fd != -1) {
|
||||
CPUState *cpu_state;
|
||||
|
||||
DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__);
|
||||
CPU_FOREACH(cpu_state) {
|
||||
DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n",
|
||||
__func__, cpu_state->cpu_index, cpu_state);
|
||||
state->cpu_by_vcpu_id[cpu_state->cpu_index] = cpu_state;
|
||||
}
|
||||
qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void xen_hvm_change_state_handler(void *opaque, bool running,
|
||||
RunState rstate)
|
||||
{
|
||||
XenIOState *state = opaque;
|
||||
|
||||
if (running) {
|
||||
xen_main_loop_prepare(state);
|
||||
}
|
||||
|
||||
xen_set_ioreq_server_state(xen_domid,
|
||||
state->ioservid,
|
||||
(rstate == RUN_STATE_RUNNING));
|
||||
}
|
||||
|
||||
void xen_exit_notifier(Notifier *n, void *data)
|
||||
{
|
||||
XenIOState *state = container_of(n, XenIOState, exit);
|
||||
|
||||
xen_destroy_ioreq_server(xen_domid, state->ioservid);
|
||||
if (state->fres != NULL) {
|
||||
xenforeignmemory_unmap_resource(xen_fmem, state->fres);
|
||||
}
|
||||
|
||||
qemu_xen_evtchn_close(state->xce_handle);
|
||||
xs_daemon_close(state->xenstore);
|
||||
}
|
||||
|
||||
static int xen_map_ioreq_server(XenIOState *state)
|
||||
{
|
||||
void *addr = NULL;
|
||||
xen_pfn_t ioreq_pfn;
|
||||
xen_pfn_t bufioreq_pfn;
|
||||
evtchn_port_t bufioreq_evtchn;
|
||||
int rc;
|
||||
|
||||
/*
|
||||
* Attempt to map using the resource API and fall back to normal
|
||||
* foreign mapping if this is not supported.
|
||||
*/
|
||||
QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_bufioreq != 0);
|
||||
QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_ioreq(0) != 1);
|
||||
state->fres = xenforeignmemory_map_resource(xen_fmem, xen_domid,
|
||||
XENMEM_resource_ioreq_server,
|
||||
state->ioservid, 0, 2,
|
||||
&addr,
|
||||
PROT_READ | PROT_WRITE, 0);
|
||||
if (state->fres != NULL) {
|
||||
trace_xen_map_resource_ioreq(state->ioservid, addr);
|
||||
state->buffered_io_page = addr;
|
||||
state->shared_page = addr + XC_PAGE_SIZE;
|
||||
} else if (errno != EOPNOTSUPP) {
|
||||
error_report("failed to map ioreq server resources: error %d handle=%p",
|
||||
errno, xen_xc);
|
||||
return -1;
|
||||
}
|
||||
|
||||
rc = xen_get_ioreq_server_info(xen_domid, state->ioservid,
|
||||
(state->shared_page == NULL) ?
|
||||
&ioreq_pfn : NULL,
|
||||
(state->buffered_io_page == NULL) ?
|
||||
&bufioreq_pfn : NULL,
|
||||
&bufioreq_evtchn);
|
||||
if (rc < 0) {
|
||||
error_report("failed to get ioreq server info: error %d handle=%p",
|
||||
errno, xen_xc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
if (state->shared_page == NULL) {
|
||||
DPRINTF("shared page at pfn %lx\n", ioreq_pfn);
|
||||
|
||||
state->shared_page = xenforeignmemory_map(xen_fmem, xen_domid,
|
||||
PROT_READ | PROT_WRITE,
|
||||
1, &ioreq_pfn, NULL);
|
||||
if (state->shared_page == NULL) {
|
||||
error_report("map shared IO page returned error %d handle=%p",
|
||||
errno, xen_xc);
|
||||
}
|
||||
}
|
||||
|
||||
if (state->buffered_io_page == NULL) {
|
||||
DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn);
|
||||
|
||||
state->buffered_io_page = xenforeignmemory_map(xen_fmem, xen_domid,
|
||||
PROT_READ | PROT_WRITE,
|
||||
1, &bufioreq_pfn,
|
||||
NULL);
|
||||
if (state->buffered_io_page == NULL) {
|
||||
error_report("map buffered IO page returned error %d", errno);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
if (state->shared_page == NULL || state->buffered_io_page == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn);
|
||||
|
||||
state->bufioreq_remote_port = bufioreq_evtchn;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void destroy_hvm_domain(bool reboot)
|
||||
{
|
||||
xc_interface *xc_handle;
|
||||
int sts;
|
||||
int rc;
|
||||
|
||||
unsigned int reason = reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff;
|
||||
|
||||
if (xen_dmod) {
|
||||
rc = xendevicemodel_shutdown(xen_dmod, xen_domid, reason);
|
||||
if (!rc) {
|
||||
return;
|
||||
}
|
||||
if (errno != ENOTTY /* old Xen */) {
|
||||
perror("xendevicemodel_shutdown failed");
|
||||
}
|
||||
/* well, try the old thing then */
|
||||
}
|
||||
|
||||
xc_handle = xc_interface_open(0, 0, 0);
|
||||
if (xc_handle == NULL) {
|
||||
fprintf(stderr, "Cannot acquire xenctrl handle\n");
|
||||
} else {
|
||||
sts = xc_domain_shutdown(xc_handle, xen_domid, reason);
|
||||
if (sts != 0) {
|
||||
fprintf(stderr, "xc_domain_shutdown failed to issue %s, "
|
||||
"sts %d, %s\n", reboot ? "reboot" : "poweroff",
|
||||
sts, strerror(errno));
|
||||
} else {
|
||||
fprintf(stderr, "Issued domain %d %s\n", xen_domid,
|
||||
reboot ? "reboot" : "poweroff");
|
||||
}
|
||||
xc_interface_close(xc_handle);
|
||||
}
|
||||
}
|
||||
|
||||
void xen_shutdown_fatal_error(const char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
vfprintf(stderr, fmt, ap);
|
||||
va_end(ap);
|
||||
fprintf(stderr, "Will destroy the domain.\n");
|
||||
/* destroy the domain */
|
||||
qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR);
|
||||
}
|
||||
|
||||
void xen_register_ioreq(XenIOState *state, unsigned int max_cpus,
|
||||
MemoryListener xen_memory_listener)
|
||||
{
|
||||
int i, rc;
|
||||
|
||||
setup_xen_backend_ops();
|
||||
|
||||
state->xce_handle = qemu_xen_evtchn_open();
|
||||
if (state->xce_handle == NULL) {
|
||||
perror("xen: event channel open");
|
||||
goto err;
|
||||
}
|
||||
|
||||
state->xenstore = xs_daemon_open();
|
||||
if (state->xenstore == NULL) {
|
||||
perror("xen: xenstore open");
|
||||
goto err;
|
||||
}
|
||||
|
||||
xen_create_ioreq_server(xen_domid, &state->ioservid);
|
||||
|
||||
state->exit.notify = xen_exit_notifier;
|
||||
qemu_add_exit_notifier(&state->exit);
|
||||
|
||||
/*
|
||||
* Register wake-up support in QMP query-current-machine API
|
||||
*/
|
||||
qemu_register_wakeup_support();
|
||||
|
||||
rc = xen_map_ioreq_server(state);
|
||||
if (rc < 0) {
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* Note: cpus is empty at this point in init */
|
||||
state->cpu_by_vcpu_id = g_malloc0(max_cpus * sizeof(CPUState *));
|
||||
|
||||
rc = xen_set_ioreq_server_state(xen_domid, state->ioservid, true);
|
||||
if (rc < 0) {
|
||||
error_report("failed to enable ioreq server info: error %d handle=%p",
|
||||
errno, xen_xc);
|
||||
goto err;
|
||||
}
|
||||
|
||||
state->ioreq_local_port = g_malloc0(max_cpus * sizeof (evtchn_port_t));
|
||||
|
||||
/* FIXME: how about if we overflow the page here? */
|
||||
for (i = 0; i < max_cpus; i++) {
|
||||
rc = qemu_xen_evtchn_bind_interdomain(state->xce_handle, xen_domid,
|
||||
xen_vcpu_eport(state->shared_page,
|
||||
i));
|
||||
if (rc == -1) {
|
||||
error_report("shared evtchn %d bind error %d", i, errno);
|
||||
goto err;
|
||||
}
|
||||
state->ioreq_local_port[i] = rc;
|
||||
}
|
||||
|
||||
rc = qemu_xen_evtchn_bind_interdomain(state->xce_handle, xen_domid,
|
||||
state->bufioreq_remote_port);
|
||||
if (rc == -1) {
|
||||
error_report("buffered evtchn bind error %d", errno);
|
||||
goto err;
|
||||
}
|
||||
state->bufioreq_local_port = rc;
|
||||
|
||||
/* Init RAM management */
|
||||
#ifdef XEN_COMPAT_PHYSMAP
|
||||
xen_map_cache_init(xen_phys_offset_to_gaddr, state);
|
||||
#else
|
||||
xen_map_cache_init(NULL, state);
|
||||
#endif
|
||||
|
||||
qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);
|
||||
|
||||
state->memory_listener = xen_memory_listener;
|
||||
memory_listener_register(&state->memory_listener, &address_space_memory);
|
||||
|
||||
state->io_listener = xen_io_listener;
|
||||
memory_listener_register(&state->io_listener, &address_space_io);
|
||||
|
||||
state->device_listener = xen_device_listener;
|
||||
QLIST_INIT(&state->dev_list);
|
||||
device_listener_register(&state->device_listener);
|
||||
|
||||
xen_bus_init();
|
||||
|
||||
xen_be_init();
|
||||
|
||||
return;
|
||||
err:
|
||||
error_report("xen hardware virtual machine initialisation failed");
|
||||
exit(1);
|
||||
}
|
||||
11
include/hw/i386/xen_arch_hvm.h
Normal file
11
include/hw/i386/xen_arch_hvm.h
Normal file
@ -0,0 +1,11 @@
|
||||
#ifndef HW_XEN_ARCH_I386_HVM_H
|
||||
#define HW_XEN_ARCH_I386_HVM_H
|
||||
|
||||
#include <xen/hvm/ioreq.h>
|
||||
#include "hw/xen/xen-hvm-common.h"
|
||||
|
||||
void arch_handle_ioreq(XenIOState *state, ioreq_t *req);
|
||||
void arch_xen_set_memory(XenIOState *state,
|
||||
MemoryRegionSection *section,
|
||||
bool add);
|
||||
#endif
|
||||
3
include/hw/xen/arch_hvm.h
Normal file
3
include/hw/xen/arch_hvm.h
Normal file
@ -0,0 +1,3 @@
|
||||
#if defined(TARGET_I386) || defined(TARGET_X86_64)
|
||||
#include "hw/i386/xen_arch_hvm.h"
|
||||
#endif
|
||||
99
include/hw/xen/xen-hvm-common.h
Normal file
99
include/hw/xen/xen-hvm-common.h
Normal file
@ -0,0 +1,99 @@
|
||||
#ifndef HW_XEN_HVM_COMMON_H
|
||||
#define HW_XEN_HVM_COMMON_H
|
||||
|
||||
#include "qemu/osdep.h"
|
||||
#include "qemu/units.h"
|
||||
|
||||
#include "cpu.h"
|
||||
#include "hw/pci/pci.h"
|
||||
#include "hw/hw.h"
|
||||
#include "hw/xen/xen_native.h"
|
||||
#include "hw/xen/xen-legacy-backend.h"
|
||||
#include "sysemu/runstate.h"
|
||||
#include "sysemu/sysemu.h"
|
||||
#include "sysemu/xen.h"
|
||||
#include "sysemu/xen-mapcache.h"
|
||||
#include "qemu/error-report.h"
|
||||
#include <xen/hvm/ioreq.h>
|
||||
|
||||
extern MemoryRegion ram_memory;
|
||||
extern MemoryListener xen_io_listener;
|
||||
extern DeviceListener xen_device_listener;
|
||||
|
||||
//#define DEBUG_XEN_HVM
|
||||
|
||||
#ifdef DEBUG_XEN_HVM
|
||||
#define DPRINTF(fmt, ...) \
|
||||
do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
|
||||
#else
|
||||
#define DPRINTF(fmt, ...) \
|
||||
do { } while (0)
|
||||
#endif
|
||||
|
||||
static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
|
||||
{
|
||||
return shared_page->vcpu_ioreq[i].vp_eport;
|
||||
}
|
||||
static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
|
||||
{
|
||||
return &shared_page->vcpu_ioreq[vcpu];
|
||||
}
|
||||
|
||||
#define BUFFER_IO_MAX_DELAY 100
|
||||
|
||||
typedef struct XenPhysmap {
|
||||
hwaddr start_addr;
|
||||
ram_addr_t size;
|
||||
const char *name;
|
||||
hwaddr phys_offset;
|
||||
|
||||
QLIST_ENTRY(XenPhysmap) list;
|
||||
} XenPhysmap;
|
||||
|
||||
typedef struct XenPciDevice {
|
||||
PCIDevice *pci_dev;
|
||||
uint32_t sbdf;
|
||||
QLIST_ENTRY(XenPciDevice) entry;
|
||||
} XenPciDevice;
|
||||
|
||||
typedef struct XenIOState {
|
||||
ioservid_t ioservid;
|
||||
shared_iopage_t *shared_page;
|
||||
buffered_iopage_t *buffered_io_page;
|
||||
xenforeignmemory_resource_handle *fres;
|
||||
QEMUTimer *buffered_io_timer;
|
||||
CPUState **cpu_by_vcpu_id;
|
||||
/* the evtchn port for polling the notification, */
|
||||
evtchn_port_t *ioreq_local_port;
|
||||
/* evtchn remote and local ports for buffered io */
|
||||
evtchn_port_t bufioreq_remote_port;
|
||||
evtchn_port_t bufioreq_local_port;
|
||||
/* the evtchn fd for polling */
|
||||
xenevtchn_handle *xce_handle;
|
||||
/* which vcpu we are serving */
|
||||
int send_vcpu;
|
||||
|
||||
struct xs_handle *xenstore;
|
||||
MemoryListener memory_listener;
|
||||
MemoryListener io_listener;
|
||||
QLIST_HEAD(, XenPciDevice) dev_list;
|
||||
DeviceListener device_listener;
|
||||
|
||||
Notifier exit;
|
||||
} XenIOState;
|
||||
|
||||
void xen_exit_notifier(Notifier *n, void *data);
|
||||
|
||||
void xen_region_add(MemoryListener *listener, MemoryRegionSection *section);
|
||||
void xen_region_del(MemoryListener *listener, MemoryRegionSection *section);
|
||||
void xen_io_add(MemoryListener *listener, MemoryRegionSection *section);
|
||||
void xen_io_del(MemoryListener *listener, MemoryRegionSection *section);
|
||||
void xen_device_realize(DeviceListener *listener, DeviceState *dev);
|
||||
void xen_device_unrealize(DeviceListener *listener, DeviceState *dev);
|
||||
|
||||
void xen_hvm_change_state_handler(void *opaque, bool running, RunState rstate);
|
||||
void xen_register_ioreq(XenIOState *state, unsigned int max_cpus,
|
||||
MemoryListener xen_memory_listener);
|
||||
|
||||
void cpu_ioreq_pio(ioreq_t *req);
|
||||
#endif /* HW_XEN_HVM_COMMON_H */
|
||||
Loading…
Reference in New Issue
Block a user