efc4093358
QEMU maps certain regions into the guest multiple times, as seen in the trace below. Currently the MSHV kernel driver will reject those mappings. To workaround this, a record is kept (a static global list of "slots", inspired by what the HVF accelerator has implemented). An overlapping region is not registered at the hypervisor, and marked as mapped=false. If there is an UNMAPPED_GPA exit, we can look for a slot that is unmapped and would cover the GPA. In this case we map out the conflicting slot and map in the requested region. mshv_set_phys_mem add=1 name=pc.bios mshv_map_memory => u_a=7ffff4e00000 gpa=00fffc0000 size=00040000 mshv_set_phys_mem add=1 name=ioapic mshv_set_phys_mem add=1 name=hpet mshv_set_phys_mem add=0 name=pc.ram mshv_unmap_memory u_a=7fff67e00000 gpa=0000000000 size=80000000 mshv_set_phys_mem add=1 name=pc.ram mshv_map_memory u_a=7fff67e00000 gpa=0000000000 size=000c0000 mshv_set_phys_mem add=1 name=pc.rom mshv_map_memory u_a=7ffff4c00000 gpa=00000c0000 size=00020000 mshv_set_phys_mem add=1 name=pc.bios mshv_remap_attempt => u_a=7ffff4e20000 gpa=00000e0000 size=00020000 The mapping table is guarded by a mutex for concurrent modification and RCU mechanisms for concurrent reads. Writes occur rarely, but we'll have to verify whether an unmapped region exist for each UNMAPPED_GPA exit, which happens frequently. Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com> Link: https://lore.kernel.org/r/20250916164847.77883-24-magnuskulke@linux.microsoft.com [Fix format strings for trace-events; mshv.h/mshv_int.h split. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
33 lines
2.5 KiB
Text
33 lines
2.5 KiB
Text
# Authors: Ziqiao Zhou <ziqiaozhou@microsoft.com>
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# Magnus Kulke <magnuskulke@microsoft.com>
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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mshv_start_vcpu_thread(const char* thread, uint32_t cpu) "thread=%s cpu_index=%d"
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mshv_set_memory(bool add, uint64_t gpa, uint64_t size, uint64_t user_addr, bool readonly, int ret) "add=%d gpa=0x%" PRIx64 " size=0x%" PRIx64 " user=0x%" PRIx64 " readonly=%d result=%d"
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mshv_mem_ioeventfd_add(uint64_t addr, uint32_t size, uint32_t data) "addr=0x%" PRIx64 " size=%d data=0x%x"
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mshv_mem_ioeventfd_del(uint64_t addr, uint32_t size, uint32_t data) "addr=0x%" PRIx64 " size=%d data=0x%x"
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mshv_hvcall_args(const char* hvcall, uint16_t code, uint16_t in_sz) "built args for '%s' code: %d in_sz: %d"
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mshv_handle_interrupt(uint32_t cpu, int mask) "cpu_index=%d mask=0x%x"
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mshv_set_msi_routing(uint32_t gsi, uint64_t addr, uint32_t data) "gsi=%d addr=0x%" PRIx64 " data=0x%x"
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mshv_remove_msi_routing(uint32_t gsi) "gsi=%d"
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mshv_add_msi_routing(uint64_t addr, uint32_t data) "addr=0x%" PRIx64 " data=0x%x"
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mshv_commit_msi_routing_table(int vm_fd, int len) "vm_fd=%d table_size=%d"
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mshv_register_irqfd(int vm_fd, int event_fd, uint32_t gsi) "vm_fd=%d event_fd=%d gsi=%d"
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mshv_irqchip_update_irqfd_notifier_gsi(int event_fd, int resample_fd, int virq, bool add) "event_fd=%d resample_fd=%d virq=%d add=%d"
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mshv_insn_fetch(uint64_t addr, size_t size) "gpa=0x%" PRIx64 " size=%zu"
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mshv_mem_write(uint64_t addr, size_t size) "\tgpa=0x%" PRIx64 " size=%zu"
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mshv_mem_read(uint64_t addr, size_t size) "\tgpa=0x%" PRIx64 " size=%zu"
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mshv_map_memory(uint64_t userspace_addr, uint64_t gpa, uint64_t size) "\tu_a=0x%" PRIx64 " gpa=0x%010" PRIx64 " size=0x%08" PRIx64
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mshv_unmap_memory(uint64_t userspace_addr, uint64_t gpa, uint64_t size) "\tu_a=0x%" PRIx64 " gpa=0x%010" PRIx64 " size=0x%08" PRIx64
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mshv_set_phys_mem(bool add, const char *name, uint64_t gpa) "\tadd=%d name=%s gpa=0x%010" PRIx64
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mshv_handle_mmio(uint64_t gva, uint64_t gpa, uint64_t size, uint8_t access_type) "\tgva=0x%" PRIx64 " gpa=0x%010" PRIx64 " size=0x%" PRIx64 " access_type=%d"
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mshv_found_slot(uint64_t userspace_addr, uint64_t gpa, uint64_t size) "\tu_a=0x%" PRIx64 " gpa=0x%010" PRIx64 " size=0x%08" PRIx64
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mshv_skip_unset_mem(uint64_t userspace_addr, uint64_t gpa, uint64_t size) "\tu_a=0x%" PRIx64 " gpa=0x%010" PRIx64 " size=0x%08" PRIx64
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mshv_remap_attempt(uint64_t userspace_addr, uint64_t gpa, uint64_t size) "\tu_a=0x%" PRIx64 " gpa=0x%010" PRIx64 " size=0x%08" PRIx64
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mshv_find_slot_by_gpa(uint64_t gpa) "\tgpa=0x%010" PRIx64
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