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KVM: selftests: Add initial support for RISC-V 64-bit
We add initial support for RISC-V 64-bit in KVM selftests using which we can cross-compile and run arch independent tests such as: demand_paging_test dirty_log_test kvm_create_max_vcpus, kvm_page_table_test set_memory_region_test kvm_binary_stats_test All VM guest modes defined in kvm_util.h require at least 48-bit guest virtual address so to use KVM RISC-V selftests hardware need to support at least Sv48 MMU for guest (i.e. VS-mode). Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-and-tested-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
Anup Patel
parent
788490e798
commit
3e06cdf105
6 changed files with 616 additions and 0 deletions
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@ -32,11 +32,16 @@ endif
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ifeq ($(ARCH),s390)
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UNAME_M := s390x
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endif
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# Set UNAME_M riscv compile/install to work
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ifeq ($(ARCH),riscv)
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UNAME_M := riscv
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endif
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LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c
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LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S
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LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c
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LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c
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LIBKVM_riscv = lib/riscv/processor.c lib/riscv/ucall.c
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TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test
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TEST_GEN_PROGS_x86_64 += x86_64/get_msr_index_features
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@ -119,6 +124,13 @@ TEST_GEN_PROGS_s390x += rseq_test
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TEST_GEN_PROGS_s390x += set_memory_region_test
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TEST_GEN_PROGS_s390x += kvm_binary_stats_test
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TEST_GEN_PROGS_riscv += demand_paging_test
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TEST_GEN_PROGS_riscv += dirty_log_test
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TEST_GEN_PROGS_riscv += kvm_create_max_vcpus
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TEST_GEN_PROGS_riscv += kvm_page_table_test
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TEST_GEN_PROGS_riscv += set_memory_region_test
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TEST_GEN_PROGS_riscv += kvm_binary_stats_test
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TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M))
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LIBKVM += $(LIBKVM_$(UNAME_M))
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@ -69,6 +69,16 @@ enum vm_guest_mode {
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#define MIN_PAGE_SHIFT 12U
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#define ptes_per_page(page_size) ((page_size) / 16)
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#elif defined(__riscv)
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#if __riscv_xlen == 32
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#error "RISC-V 32-bit kvm selftests not supported"
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#endif
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#define VM_MODE_DEFAULT VM_MODE_P40V48_4K
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#define MIN_PAGE_SHIFT 12U
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#define ptes_per_page(page_size) ((page_size) / 8)
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#endif
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#define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT)
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135
tools/testing/selftests/kvm/include/riscv/processor.h
Normal file
135
tools/testing/selftests/kvm/include/riscv/processor.h
Normal file
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@ -0,0 +1,135 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* RISC-V processor specific defines
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*
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* Copyright (C) 2021 Western Digital Corporation or its affiliates.
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*/
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#ifndef SELFTEST_KVM_PROCESSOR_H
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#define SELFTEST_KVM_PROCESSOR_H
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#include "kvm_util.h"
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#include <linux/stringify.h>
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static inline uint64_t __kvm_reg_id(uint64_t type, uint64_t idx,
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uint64_t size)
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{
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return KVM_REG_RISCV | type | idx | size;
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}
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#if __riscv_xlen == 64
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#define KVM_REG_SIZE_ULONG KVM_REG_SIZE_U64
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#else
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#define KVM_REG_SIZE_ULONG KVM_REG_SIZE_U32
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#endif
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#define RISCV_CONFIG_REG(name) __kvm_reg_id(KVM_REG_RISCV_CONFIG, \
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KVM_REG_RISCV_CONFIG_REG(name), \
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KVM_REG_SIZE_ULONG)
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#define RISCV_CORE_REG(name) __kvm_reg_id(KVM_REG_RISCV_CORE, \
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KVM_REG_RISCV_CORE_REG(name), \
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KVM_REG_SIZE_ULONG)
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#define RISCV_CSR_REG(name) __kvm_reg_id(KVM_REG_RISCV_CSR, \
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KVM_REG_RISCV_CSR_REG(name), \
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KVM_REG_SIZE_ULONG)
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#define RISCV_TIMER_REG(name) __kvm_reg_id(KVM_REG_RISCV_TIMER, \
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KVM_REG_RISCV_TIMER_REG(name), \
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KVM_REG_SIZE_U64)
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static inline void get_reg(struct kvm_vm *vm, uint32_t vcpuid, uint64_t id,
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unsigned long *addr)
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{
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struct kvm_one_reg reg;
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reg.id = id;
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reg.addr = (unsigned long)addr;
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vcpu_get_reg(vm, vcpuid, ®);
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}
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static inline void set_reg(struct kvm_vm *vm, uint32_t vcpuid, uint64_t id,
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unsigned long val)
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{
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struct kvm_one_reg reg;
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reg.id = id;
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reg.addr = (unsigned long)&val;
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vcpu_set_reg(vm, vcpuid, ®);
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}
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/* L3 index Bit[47:39] */
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#define PGTBL_L3_INDEX_MASK 0x0000FF8000000000ULL
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#define PGTBL_L3_INDEX_SHIFT 39
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#define PGTBL_L3_BLOCK_SHIFT 39
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#define PGTBL_L3_BLOCK_SIZE 0x0000008000000000ULL
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#define PGTBL_L3_MAP_MASK (~(PGTBL_L3_BLOCK_SIZE - 1))
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/* L2 index Bit[38:30] */
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#define PGTBL_L2_INDEX_MASK 0x0000007FC0000000ULL
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#define PGTBL_L2_INDEX_SHIFT 30
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#define PGTBL_L2_BLOCK_SHIFT 30
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#define PGTBL_L2_BLOCK_SIZE 0x0000000040000000ULL
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#define PGTBL_L2_MAP_MASK (~(PGTBL_L2_BLOCK_SIZE - 1))
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/* L1 index Bit[29:21] */
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#define PGTBL_L1_INDEX_MASK 0x000000003FE00000ULL
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#define PGTBL_L1_INDEX_SHIFT 21
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#define PGTBL_L1_BLOCK_SHIFT 21
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#define PGTBL_L1_BLOCK_SIZE 0x0000000000200000ULL
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#define PGTBL_L1_MAP_MASK (~(PGTBL_L1_BLOCK_SIZE - 1))
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/* L0 index Bit[20:12] */
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#define PGTBL_L0_INDEX_MASK 0x00000000001FF000ULL
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#define PGTBL_L0_INDEX_SHIFT 12
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#define PGTBL_L0_BLOCK_SHIFT 12
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#define PGTBL_L0_BLOCK_SIZE 0x0000000000001000ULL
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#define PGTBL_L0_MAP_MASK (~(PGTBL_L0_BLOCK_SIZE - 1))
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#define PGTBL_PTE_ADDR_MASK 0x003FFFFFFFFFFC00ULL
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#define PGTBL_PTE_ADDR_SHIFT 10
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#define PGTBL_PTE_RSW_MASK 0x0000000000000300ULL
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#define PGTBL_PTE_RSW_SHIFT 8
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#define PGTBL_PTE_DIRTY_MASK 0x0000000000000080ULL
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#define PGTBL_PTE_DIRTY_SHIFT 7
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#define PGTBL_PTE_ACCESSED_MASK 0x0000000000000040ULL
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#define PGTBL_PTE_ACCESSED_SHIFT 6
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#define PGTBL_PTE_GLOBAL_MASK 0x0000000000000020ULL
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#define PGTBL_PTE_GLOBAL_SHIFT 5
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#define PGTBL_PTE_USER_MASK 0x0000000000000010ULL
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#define PGTBL_PTE_USER_SHIFT 4
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#define PGTBL_PTE_EXECUTE_MASK 0x0000000000000008ULL
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#define PGTBL_PTE_EXECUTE_SHIFT 3
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#define PGTBL_PTE_WRITE_MASK 0x0000000000000004ULL
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#define PGTBL_PTE_WRITE_SHIFT 2
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#define PGTBL_PTE_READ_MASK 0x0000000000000002ULL
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#define PGTBL_PTE_READ_SHIFT 1
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#define PGTBL_PTE_PERM_MASK (PGTBL_PTE_EXECUTE_MASK | \
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PGTBL_PTE_WRITE_MASK | \
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PGTBL_PTE_READ_MASK)
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#define PGTBL_PTE_VALID_MASK 0x0000000000000001ULL
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#define PGTBL_PTE_VALID_SHIFT 0
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#define PGTBL_PAGE_SIZE PGTBL_L0_BLOCK_SIZE
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#define PGTBL_PAGE_SIZE_SHIFT PGTBL_L0_BLOCK_SHIFT
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#define SATP_PPN _AC(0x00000FFFFFFFFFFF, UL)
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#define SATP_MODE_39 _AC(0x8000000000000000, UL)
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#define SATP_MODE_48 _AC(0x9000000000000000, UL)
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#define SATP_ASID_BITS 16
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#define SATP_ASID_SHIFT 44
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#define SATP_ASID_MASK _AC(0xFFFF, UL)
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#define SBI_EXT_EXPERIMENTAL_START 0x08000000
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#define SBI_EXT_EXPERIMENTAL_END 0x08FFFFFF
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#define KVM_RISCV_SELFTESTS_SBI_EXT SBI_EXT_EXPERIMENTAL_END
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struct sbiret {
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long error;
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long value;
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};
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struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
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unsigned long arg1, unsigned long arg2,
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unsigned long arg3, unsigned long arg4,
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unsigned long arg5);
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#endif /* SELFTEST_KVM_PROCESSOR_H */
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@ -38,6 +38,16 @@ void guest_modes_append_default(void)
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guest_mode_append(VM_MODE_P47V64_4K, true, true);
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}
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#endif
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#ifdef __riscv
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{
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unsigned int sz = kvm_check_cap(KVM_CAP_VM_GPA_BITS);
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if (sz >= 52)
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guest_mode_append(VM_MODE_P52V48_4K, true, true);
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if (sz >= 48)
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guest_mode_append(VM_MODE_P48V48_4K, true, true);
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}
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#endif
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}
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void for_each_guest_mode(void (*func)(enum vm_guest_mode, void *), void *arg)
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362
tools/testing/selftests/kvm/lib/riscv/processor.c
Normal file
362
tools/testing/selftests/kvm/lib/riscv/processor.c
Normal file
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@ -0,0 +1,362 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* RISC-V code
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*
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* Copyright (C) 2021 Western Digital Corporation or its affiliates.
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*/
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#include <linux/compiler.h>
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#include <assert.h>
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#include "kvm_util.h"
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#include "../kvm_util_internal.h"
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#include "processor.h"
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#define DEFAULT_RISCV_GUEST_STACK_VADDR_MIN 0xac0000
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static uint64_t page_align(struct kvm_vm *vm, uint64_t v)
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{
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return (v + vm->page_size) & ~(vm->page_size - 1);
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}
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static uint64_t pte_addr(struct kvm_vm *vm, uint64_t entry)
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{
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return ((entry & PGTBL_PTE_ADDR_MASK) >> PGTBL_PTE_ADDR_SHIFT) <<
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PGTBL_PAGE_SIZE_SHIFT;
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}
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static uint64_t ptrs_per_pte(struct kvm_vm *vm)
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{
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return PGTBL_PAGE_SIZE / sizeof(uint64_t);
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}
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static uint64_t pte_index_mask[] = {
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PGTBL_L0_INDEX_MASK,
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PGTBL_L1_INDEX_MASK,
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PGTBL_L2_INDEX_MASK,
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PGTBL_L3_INDEX_MASK,
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};
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static uint32_t pte_index_shift[] = {
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PGTBL_L0_INDEX_SHIFT,
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PGTBL_L1_INDEX_SHIFT,
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PGTBL_L2_INDEX_SHIFT,
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PGTBL_L3_INDEX_SHIFT,
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};
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static uint64_t pte_index(struct kvm_vm *vm, vm_vaddr_t gva, int level)
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{
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TEST_ASSERT(level > -1,
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"Negative page table level (%d) not possible", level);
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TEST_ASSERT(level < vm->pgtable_levels,
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"Invalid page table level (%d)", level);
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return (gva & pte_index_mask[level]) >> pte_index_shift[level];
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}
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void virt_pgd_alloc(struct kvm_vm *vm)
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{
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if (!vm->pgd_created) {
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vm_paddr_t paddr = vm_phy_pages_alloc(vm,
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page_align(vm, ptrs_per_pte(vm) * 8) / vm->page_size,
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KVM_GUEST_PAGE_TABLE_MIN_PADDR, 0);
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vm->pgd = paddr;
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vm->pgd_created = true;
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}
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}
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void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr)
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{
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uint64_t *ptep, next_ppn;
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int level = vm->pgtable_levels - 1;
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TEST_ASSERT((vaddr % vm->page_size) == 0,
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"Virtual address not on page boundary,\n"
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" vaddr: 0x%lx vm->page_size: 0x%x", vaddr, vm->page_size);
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TEST_ASSERT(sparsebit_is_set(vm->vpages_valid,
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(vaddr >> vm->page_shift)),
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"Invalid virtual address, vaddr: 0x%lx", vaddr);
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TEST_ASSERT((paddr % vm->page_size) == 0,
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"Physical address not on page boundary,\n"
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" paddr: 0x%lx vm->page_size: 0x%x", paddr, vm->page_size);
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TEST_ASSERT((paddr >> vm->page_shift) <= vm->max_gfn,
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"Physical address beyond maximum supported,\n"
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" paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x",
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paddr, vm->max_gfn, vm->page_size);
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ptep = addr_gpa2hva(vm, vm->pgd) + pte_index(vm, vaddr, level) * 8;
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if (!*ptep) {
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next_ppn = vm_alloc_page_table(vm) >> PGTBL_PAGE_SIZE_SHIFT;
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*ptep = (next_ppn << PGTBL_PTE_ADDR_SHIFT) |
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PGTBL_PTE_VALID_MASK;
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}
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level--;
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while (level > -1) {
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ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) +
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pte_index(vm, vaddr, level) * 8;
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if (!*ptep && level > 0) {
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next_ppn = vm_alloc_page_table(vm) >>
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PGTBL_PAGE_SIZE_SHIFT;
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*ptep = (next_ppn << PGTBL_PTE_ADDR_SHIFT) |
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PGTBL_PTE_VALID_MASK;
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}
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level--;
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}
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paddr = paddr >> PGTBL_PAGE_SIZE_SHIFT;
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*ptep = (paddr << PGTBL_PTE_ADDR_SHIFT) |
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PGTBL_PTE_PERM_MASK | PGTBL_PTE_VALID_MASK;
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}
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vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
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{
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uint64_t *ptep;
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int level = vm->pgtable_levels - 1;
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if (!vm->pgd_created)
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goto unmapped_gva;
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ptep = addr_gpa2hva(vm, vm->pgd) + pte_index(vm, gva, level) * 8;
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if (!ptep)
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goto unmapped_gva;
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level--;
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while (level > -1) {
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ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) +
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pte_index(vm, gva, level) * 8;
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if (!ptep)
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goto unmapped_gva;
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level--;
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}
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return pte_addr(vm, *ptep) + (gva & (vm->page_size - 1));
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unmapped_gva:
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TEST_FAIL("No mapping for vm virtual address gva: 0x%lx level: %d",
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gva, level);
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exit(1);
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}
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static void pte_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent,
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uint64_t page, int level)
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{
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#ifdef DEBUG
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static const char *const type[] = { "pte", "pmd", "pud", "p4d"};
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uint64_t pte, *ptep;
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if (level < 0)
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return;
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for (pte = page; pte < page + ptrs_per_pte(vm) * 8; pte += 8) {
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ptep = addr_gpa2hva(vm, pte);
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if (!*ptep)
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continue;
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fprintf(stream, "%*s%s: %lx: %lx at %p\n", indent, "",
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type[level], pte, *ptep, ptep);
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pte_dump(stream, vm, indent + 1,
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pte_addr(vm, *ptep), level - 1);
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}
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#endif
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}
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void virt_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent)
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{
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int level = vm->pgtable_levels - 1;
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uint64_t pgd, *ptep;
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if (!vm->pgd_created)
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return;
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for (pgd = vm->pgd; pgd < vm->pgd + ptrs_per_pte(vm) * 8; pgd += 8) {
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ptep = addr_gpa2hva(vm, pgd);
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if (!*ptep)
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continue;
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fprintf(stream, "%*spgd: %lx: %lx at %p\n", indent, "",
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pgd, *ptep, ptep);
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pte_dump(stream, vm, indent + 1,
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pte_addr(vm, *ptep), level - 1);
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}
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}
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|
||||
void riscv_vcpu_mmu_setup(struct kvm_vm *vm, int vcpuid)
|
||||
{
|
||||
unsigned long satp;
|
||||
|
||||
/*
|
||||
* The RISC-V Sv48 MMU mode supports 56-bit physical address
|
||||
* for 48-bit virtual address with 4KB last level page size.
|
||||
*/
|
||||
switch (vm->mode) {
|
||||
case VM_MODE_P52V48_4K:
|
||||
case VM_MODE_P48V48_4K:
|
||||
case VM_MODE_P40V48_4K:
|
||||
break;
|
||||
default:
|
||||
TEST_FAIL("Unknown guest mode, mode: 0x%x", vm->mode);
|
||||
}
|
||||
|
||||
satp = (vm->pgd >> PGTBL_PAGE_SIZE_SHIFT) & SATP_PPN;
|
||||
satp |= SATP_MODE_48;
|
||||
|
||||
set_reg(vm, vcpuid, RISCV_CSR_REG(satp), satp);
|
||||
}
|
||||
|
||||
void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent)
|
||||
{
|
||||
struct kvm_riscv_core core;
|
||||
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(mode), &core.mode);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.pc), &core.regs.pc);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.ra), &core.regs.ra);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.sp), &core.regs.sp);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.gp), &core.regs.gp);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.tp), &core.regs.tp);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.t0), &core.regs.t0);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.t1), &core.regs.t1);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.t2), &core.regs.t2);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s0), &core.regs.s0);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s1), &core.regs.s1);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a0), &core.regs.a0);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a1), &core.regs.a1);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a2), &core.regs.a2);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a3), &core.regs.a3);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a4), &core.regs.a4);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a5), &core.regs.a5);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a6), &core.regs.a6);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.a7), &core.regs.a7);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s2), &core.regs.s2);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s3), &core.regs.s3);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s4), &core.regs.s4);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s5), &core.regs.s5);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s6), &core.regs.s6);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s7), &core.regs.s7);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s8), &core.regs.s8);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s9), &core.regs.s9);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s10), &core.regs.s10);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.s11), &core.regs.s11);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.t3), &core.regs.t3);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.t4), &core.regs.t4);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.t5), &core.regs.t5);
|
||||
get_reg(vm, vcpuid, RISCV_CORE_REG(regs.t6), &core.regs.t6);
|
||||
|
||||
fprintf(stream,
|
||||
" MODE: 0x%lx\n", core.mode);
|
||||
fprintf(stream,
|
||||
" PC: 0x%016lx RA: 0x%016lx SP: 0x%016lx GP: 0x%016lx\n",
|
||||
core.regs.pc, core.regs.ra, core.regs.sp, core.regs.gp);
|
||||
fprintf(stream,
|
||||
" TP: 0x%016lx T0: 0x%016lx T1: 0x%016lx T2: 0x%016lx\n",
|
||||
core.regs.tp, core.regs.t0, core.regs.t1, core.regs.t2);
|
||||
fprintf(stream,
|
||||
" S0: 0x%016lx S1: 0x%016lx A0: 0x%016lx A1: 0x%016lx\n",
|
||||
core.regs.s0, core.regs.s1, core.regs.a0, core.regs.a1);
|
||||
fprintf(stream,
|
||||
" A2: 0x%016lx A3: 0x%016lx A4: 0x%016lx A5: 0x%016lx\n",
|
||||
core.regs.a2, core.regs.a3, core.regs.a4, core.regs.a5);
|
||||
fprintf(stream,
|
||||
" A6: 0x%016lx A7: 0x%016lx S2: 0x%016lx S3: 0x%016lx\n",
|
||||
core.regs.a6, core.regs.a7, core.regs.s2, core.regs.s3);
|
||||
fprintf(stream,
|
||||
" S4: 0x%016lx S5: 0x%016lx S6: 0x%016lx S7: 0x%016lx\n",
|
||||
core.regs.s4, core.regs.s5, core.regs.s6, core.regs.s7);
|
||||
fprintf(stream,
|
||||
" S8: 0x%016lx S9: 0x%016lx S10: 0x%016lx S11: 0x%016lx\n",
|
||||
core.regs.s8, core.regs.s9, core.regs.s10, core.regs.s11);
|
||||
fprintf(stream,
|
||||
" T3: 0x%016lx T4: 0x%016lx T5: 0x%016lx T6: 0x%016lx\n",
|
||||
core.regs.t3, core.regs.t4, core.regs.t5, core.regs.t6);
|
||||
}
|
||||
|
||||
static void guest_hang(void)
|
||||
{
|
||||
while (1)
|
||||
;
|
||||
}
|
||||
|
||||
void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
|
||||
{
|
||||
int r;
|
||||
size_t stack_size = vm->page_size == 4096 ?
|
||||
DEFAULT_STACK_PGS * vm->page_size :
|
||||
vm->page_size;
|
||||
unsigned long stack_vaddr = vm_vaddr_alloc(vm, stack_size,
|
||||
DEFAULT_RISCV_GUEST_STACK_VADDR_MIN);
|
||||
unsigned long current_gp = 0;
|
||||
struct kvm_mp_state mps;
|
||||
|
||||
vm_vcpu_add(vm, vcpuid);
|
||||
riscv_vcpu_mmu_setup(vm, vcpuid);
|
||||
|
||||
/*
|
||||
* With SBI HSM support in KVM RISC-V, all secondary VCPUs are
|
||||
* powered-off by default so we ensure that all secondary VCPUs
|
||||
* are powered-on using KVM_SET_MP_STATE ioctl().
|
||||
*/
|
||||
mps.mp_state = KVM_MP_STATE_RUNNABLE;
|
||||
r = _vcpu_ioctl(vm, vcpuid, KVM_SET_MP_STATE, &mps);
|
||||
TEST_ASSERT(!r, "IOCTL KVM_SET_MP_STATE failed (error %d)", r);
|
||||
|
||||
/* Setup global pointer of guest to be same as the host */
|
||||
asm volatile (
|
||||
"add %0, gp, zero" : "=r" (current_gp) : : "memory");
|
||||
set_reg(vm, vcpuid, RISCV_CORE_REG(regs.gp), current_gp);
|
||||
|
||||
/* Setup stack pointer and program counter of guest */
|
||||
set_reg(vm, vcpuid, RISCV_CORE_REG(regs.sp),
|
||||
stack_vaddr + stack_size);
|
||||
set_reg(vm, vcpuid, RISCV_CORE_REG(regs.pc),
|
||||
(unsigned long)guest_code);
|
||||
|
||||
/* Setup default exception vector of guest */
|
||||
set_reg(vm, vcpuid, RISCV_CSR_REG(stvec),
|
||||
(unsigned long)guest_hang);
|
||||
}
|
||||
|
||||
void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...)
|
||||
{
|
||||
va_list ap;
|
||||
uint64_t id = RISCV_CORE_REG(regs.a0);
|
||||
int i;
|
||||
|
||||
TEST_ASSERT(num >= 1 && num <= 8, "Unsupported number of args,\n"
|
||||
" num: %u\n", num);
|
||||
|
||||
va_start(ap, num);
|
||||
|
||||
for (i = 0; i < num; i++) {
|
||||
switch (i) {
|
||||
case 0:
|
||||
id = RISCV_CORE_REG(regs.a0);
|
||||
break;
|
||||
case 1:
|
||||
id = RISCV_CORE_REG(regs.a1);
|
||||
break;
|
||||
case 2:
|
||||
id = RISCV_CORE_REG(regs.a2);
|
||||
break;
|
||||
case 3:
|
||||
id = RISCV_CORE_REG(regs.a3);
|
||||
break;
|
||||
case 4:
|
||||
id = RISCV_CORE_REG(regs.a4);
|
||||
break;
|
||||
case 5:
|
||||
id = RISCV_CORE_REG(regs.a5);
|
||||
break;
|
||||
case 6:
|
||||
id = RISCV_CORE_REG(regs.a6);
|
||||
break;
|
||||
case 7:
|
||||
id = RISCV_CORE_REG(regs.a7);
|
||||
break;
|
||||
};
|
||||
set_reg(vm, vcpuid, id, va_arg(ap, uint64_t));
|
||||
}
|
||||
|
||||
va_end(ap);
|
||||
}
|
||||
|
||||
void assert_on_unhandled_exception(struct kvm_vm *vm, uint32_t vcpuid)
|
||||
{
|
||||
}
|
||||
87
tools/testing/selftests/kvm/lib/riscv/ucall.c
Normal file
87
tools/testing/selftests/kvm/lib/riscv/ucall.c
Normal file
|
|
@ -0,0 +1,87 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* ucall support. A ucall is a "hypercall to userspace".
|
||||
*
|
||||
* Copyright (C) 2021 Western Digital Corporation or its affiliates.
|
||||
*/
|
||||
|
||||
#include <linux/kvm.h>
|
||||
|
||||
#include "kvm_util.h"
|
||||
#include "../kvm_util_internal.h"
|
||||
#include "processor.h"
|
||||
|
||||
void ucall_init(struct kvm_vm *vm, void *arg)
|
||||
{
|
||||
}
|
||||
|
||||
void ucall_uninit(struct kvm_vm *vm)
|
||||
{
|
||||
}
|
||||
|
||||
struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
|
||||
unsigned long arg1, unsigned long arg2,
|
||||
unsigned long arg3, unsigned long arg4,
|
||||
unsigned long arg5)
|
||||
{
|
||||
register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0);
|
||||
register uintptr_t a1 asm ("a1") = (uintptr_t)(arg1);
|
||||
register uintptr_t a2 asm ("a2") = (uintptr_t)(arg2);
|
||||
register uintptr_t a3 asm ("a3") = (uintptr_t)(arg3);
|
||||
register uintptr_t a4 asm ("a4") = (uintptr_t)(arg4);
|
||||
register uintptr_t a5 asm ("a5") = (uintptr_t)(arg5);
|
||||
register uintptr_t a6 asm ("a6") = (uintptr_t)(fid);
|
||||
register uintptr_t a7 asm ("a7") = (uintptr_t)(ext);
|
||||
struct sbiret ret;
|
||||
|
||||
asm volatile (
|
||||
"ecall"
|
||||
: "+r" (a0), "+r" (a1)
|
||||
: "r" (a2), "r" (a3), "r" (a4), "r" (a5), "r" (a6), "r" (a7)
|
||||
: "memory");
|
||||
ret.error = a0;
|
||||
ret.value = a1;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void ucall(uint64_t cmd, int nargs, ...)
|
||||
{
|
||||
struct ucall uc = {
|
||||
.cmd = cmd,
|
||||
};
|
||||
va_list va;
|
||||
int i;
|
||||
|
||||
nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
|
||||
|
||||
va_start(va, nargs);
|
||||
for (i = 0; i < nargs; ++i)
|
||||
uc.args[i] = va_arg(va, uint64_t);
|
||||
va_end(va);
|
||||
|
||||
sbi_ecall(KVM_RISCV_SELFTESTS_SBI_EXT, 0, (vm_vaddr_t)&uc,
|
||||
0, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc)
|
||||
{
|
||||
struct kvm_run *run = vcpu_state(vm, vcpu_id);
|
||||
struct ucall ucall = {};
|
||||
|
||||
if (uc)
|
||||
memset(uc, 0, sizeof(*uc));
|
||||
|
||||
if (run->exit_reason == KVM_EXIT_RISCV_SBI &&
|
||||
run->riscv_sbi.extension_id == KVM_RISCV_SELFTESTS_SBI_EXT &&
|
||||
run->riscv_sbi.function_id == 0) {
|
||||
memcpy(&ucall, addr_gva2hva(vm, run->riscv_sbi.args[0]),
|
||||
sizeof(ucall));
|
||||
|
||||
vcpu_run_complete_io(vm, vcpu_id);
|
||||
if (uc)
|
||||
memcpy(uc, &ucall, sizeof(ucall));
|
||||
}
|
||||
|
||||
return ucall.cmd;
|
||||
}
|
||||
Loading…
Reference in a new issue