From patchwork Thu Apr 10 03:56:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 879938 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 4C8921E9B3C; Thu, 10 Apr 2025 03:56:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744257422; cv=none; b=RBZAY4uwSgrQjJ2hcuh+fZdCRBuF0ugJzhWXbGOXHyOdCBmZEH3cnrjdHdPMJF4VEILc28uzlHo/+x29DVxYL1IRBNAgEUX1kJhxkzk/D8QrCz0+qe/PW31KjEiLjM3ZjBNprdvYIwoXrwEywVMtOtwPxgmZNMMLtHPsYxx47/I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744257422; c=relaxed/simple; bh=AREGUc6oqh7HTfWgWidfpW5B61LW5V2LRF/ZTXpmQkI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=qAbjEiXEN0sW1JrXOKAjabTpDMZBIW9q6/pr7yo40v/q1WJUxHCB5TL1OB4QfXzM/CzZ+dVNRFOZ8TYw20dnuHH+TLYxOetYZYQ4xB6V2S0mtD0tp+28BZDS/auDsD7FdBC2+mVdRZs8zlXTAyKhpe0l2V4wTOalIbxFJHqMLMU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8AxmnGBQfdn15K2AA--.41598S3; Thu, 10 Apr 2025 11:56:49 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMBxHcV_QfdnQWl3AA--.27477S3; Thu, 10 Apr 2025 11:56:48 +0800 (CST) From: Bibo Mao To: Paolo Bonzini , Huacai Chen , Shuah Khan Cc: Sean Christopherson , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v8 1/4] KVM: selftests: Add KVM selftests header files for LoongArch Date: Thu, 10 Apr 2025 11:56:44 +0800 Message-Id: <20250410035647.3501139-2-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250410035647.3501139-1-maobibo@loongson.cn> References: <20250410035647.3501139-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: qMiowMBxHcV_QfdnQWl3AA--.27477S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Add KVM selftests header files for LoongArch, including processor.h and kvm_util_base.h. It mainly contains LoongArch CSR register definition and page table entry definition. Signed-off-by: Bibo Mao --- .../testing/selftests/kvm/include/kvm_util.h | 5 + .../kvm/include/loongarch/kvm_util_arch.h | 7 + .../kvm/include/loongarch/processor.h | 138 ++++++++++++++++++ 3 files changed, 150 insertions(+) create mode 100644 tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h create mode 100644 tools/testing/selftests/kvm/include/loongarch/processor.h diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 373912464fb4..d9cb62207c57 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -232,6 +232,11 @@ extern enum vm_guest_mode vm_mode_default; #define MIN_PAGE_SHIFT 12U #define ptes_per_page(page_size) ((page_size) / 8) +#elif defined(__loongarch__) +#define VM_MODE_DEFAULT VM_MODE_P36V47_16K +#define MIN_PAGE_SHIFT 12U +#define ptes_per_page(page_size) ((page_size) / 8) + #endif #define VM_SHAPE_DEFAULT VM_SHAPE(VM_MODE_DEFAULT) diff --git a/tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h b/tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h new file mode 100644 index 000000000000..e43a57d99b56 --- /dev/null +++ b/tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef SELFTEST_KVM_UTIL_ARCH_H +#define SELFTEST_KVM_UTIL_ARCH_H + +struct kvm_vm_arch {}; + +#endif // SELFTEST_KVM_UTIL_ARCH_H diff --git a/tools/testing/selftests/kvm/include/loongarch/processor.h b/tools/testing/selftests/kvm/include/loongarch/processor.h new file mode 100644 index 000000000000..e95dd2059605 --- /dev/null +++ b/tools/testing/selftests/kvm/include/loongarch/processor.h @@ -0,0 +1,138 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef SELFTEST_KVM_PROCESSOR_H +#define SELFTEST_KVM_PROCESSOR_H + +#ifndef __ASSEMBLER__ +#include "ucall_common.h" + +#else +/* general registers */ +#define zero $r0 +#define ra $r1 +#define tp $r2 +#define sp $r3 +#define a0 $r4 +#define a1 $r5 +#define a2 $r6 +#define a3 $r7 +#define a4 $r8 +#define a5 $r9 +#define a6 $r10 +#define a7 $r11 +#define t0 $r12 +#define t1 $r13 +#define t2 $r14 +#define t3 $r15 +#define t4 $r16 +#define t5 $r17 +#define t6 $r18 +#define t7 $r19 +#define t8 $r20 +#define u0 $r21 +#define fp $r22 +#define s0 $r23 +#define s1 $r24 +#define s2 $r25 +#define s3 $r26 +#define s4 $r27 +#define s5 $r28 +#define s6 $r29 +#define s7 $r30 +#define s8 $r31 +#endif + +/* LoongArch page table entry definition */ +#define _PAGE_VALID_SHIFT 0 +#define _PAGE_DIRTY_SHIFT 1 +#define _PAGE_PLV_SHIFT 2 /* 2~3, two bits */ +#define PLV_KERN 0 +#define PLV_USER 3 +#define PLV_MASK 0x3 +#define _CACHE_SHIFT 4 /* 4~5, two bits */ +#define _PAGE_PRESENT_SHIFT 7 +#define _PAGE_WRITE_SHIFT 8 + +#define _PAGE_VALID BIT_ULL(_PAGE_VALID_SHIFT) +#define _PAGE_PRESENT BIT_ULL(_PAGE_PRESENT_SHIFT) +#define _PAGE_WRITE BIT_ULL(_PAGE_WRITE_SHIFT) +#define _PAGE_DIRTY BIT_ULL(_PAGE_DIRTY_SHIFT) +#define _PAGE_USER (PLV_USER << _PAGE_PLV_SHIFT) +#define __READABLE (_PAGE_VALID) +#define __WRITEABLE (_PAGE_DIRTY | _PAGE_WRITE) +/* Coherent Cached */ +#define _CACHE_CC BIT_ULL(_CACHE_SHIFT) +#define PS_4K 0x0000000c +#define PS_8K 0x0000000d +#define PS_16K 0x0000000e +#define PS_DEFAULT_SIZE PS_16K + +/* LoongArch Basic CSR registers */ +#define LOONGARCH_CSR_CRMD 0x0 /* Current mode info */ +#define CSR_CRMD_PG_SHIFT 4 +#define CSR_CRMD_PG BIT_ULL(CSR_CRMD_PG_SHIFT) +#define CSR_CRMD_IE_SHIFT 2 +#define CSR_CRMD_IE BIT_ULL(CSR_CRMD_IE_SHIFT) +#define CSR_CRMD_PLV_SHIFT 0 +#define CSR_CRMD_PLV_WIDTH 2 +#define CSR_CRMD_PLV (0x3UL << CSR_CRMD_PLV_SHIFT) +#define PLV_MASK 0x3 +#define LOONGARCH_CSR_PRMD 0x1 +#define LOONGARCH_CSR_EUEN 0x2 +#define LOONGARCH_CSR_ECFG 0x4 +#define LOONGARCH_CSR_ESTAT 0x5 /* Exception status */ +#define LOONGARCH_CSR_ERA 0x6 /* ERA */ +#define LOONGARCH_CSR_BADV 0x7 /* Bad virtual address */ +#define LOONGARCH_CSR_EENTRY 0xc +#define LOONGARCH_CSR_TLBIDX 0x10 /* TLB Index, EHINV, PageSize */ +#define CSR_TLBIDX_PS_SHIFT 24 +#define CSR_TLBIDX_PS_WIDTH 6 +#define CSR_TLBIDX_PS (0x3fUL << CSR_TLBIDX_PS_SHIFT) +#define CSR_TLBIDX_SIZEM 0x3f000000 +#define CSR_TLBIDX_SIZE CSR_TLBIDX_PS_SHIFT +#define LOONGARCH_CSR_ASID 0x18 /* ASID */ +#define LOONGARCH_CSR_PGDL 0x19 +#define LOONGARCH_CSR_PGDH 0x1a +/* Page table base */ +#define LOONGARCH_CSR_PGD 0x1b +#define LOONGARCH_CSR_PWCTL0 0x1c +#define LOONGARCH_CSR_PWCTL1 0x1d +#define LOONGARCH_CSR_STLBPGSIZE 0x1e +#define LOONGARCH_CSR_CPUID 0x20 +#define LOONGARCH_CSR_KS0 0x30 +#define LOONGARCH_CSR_KS1 0x31 +#define LOONGARCH_CSR_TMID 0x40 +#define LOONGARCH_CSR_TCFG 0x41 +/* TLB refill exception entry */ +#define LOONGARCH_CSR_TLBRENTRY 0x88 +#define LOONGARCH_CSR_TLBRSAVE 0x8b +#define LOONGARCH_CSR_TLBREHI 0x8e +#define CSR_TLBREHI_PS_SHIFT 0 +#define CSR_TLBREHI_PS (0x3fUL << CSR_TLBREHI_PS_SHIFT) + +#define EXREGS_GPRS (32) + +#ifndef __ASSEMBLER__ +void handle_tlb_refill(void); +void handle_exception(void); + +struct ex_regs { + unsigned long regs[EXREGS_GPRS]; + unsigned long pc; + unsigned long estat; + unsigned long badv; +}; + +#define PC_OFFSET_EXREGS offsetof(struct ex_regs, pc) +#define ESTAT_OFFSET_EXREGS offsetof(struct ex_regs, estat) +#define BADV_OFFSET_EXREGS offsetof(struct ex_regs, badv) +#define EXREGS_SIZE sizeof(struct ex_regs) + +#else +#define PC_OFFSET_EXREGS ((EXREGS_GPRS + 0) * 8) +#define ESTAT_OFFSET_EXREGS ((EXREGS_GPRS + 1) * 8) +#define BADV_OFFSET_EXREGS ((EXREGS_GPRS + 2) * 8) +#define EXREGS_SIZE ((EXREGS_GPRS + 3) * 8) +#endif + +#endif /* SELFTEST_KVM_PROCESSOR_H */ From patchwork Thu Apr 10 03:56:45 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 880433 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B15E71EEA3E; Thu, 10 Apr 2025 03:56:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8BxnmuCQfdn25K2AA--.41416S3; Thu, 10 Apr 2025 11:56:50 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMBxHcV_QfdnQWl3AA--.27477S4; Thu, 10 Apr 2025 11:56:49 +0800 (CST) From: Bibo Mao To: Paolo Bonzini , Huacai Chen , Shuah Khan Cc: Sean Christopherson , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v8 2/4] KVM: selftests: Add core KVM selftests support for LoongArch Date: Thu, 10 Apr 2025 11:56:45 +0800 Message-Id: <20250410035647.3501139-3-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250410035647.3501139-1-maobibo@loongson.cn> References: <20250410035647.3501139-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: qMiowMBxHcV_QfdnQWl3AA--.27477S4 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Add core KVM selftests support for LoongArch, it includes exception handler, mmu page table setup and vcpu startup entry supporting etc. Signed-off-by: Bibo Mao --- .../selftests/kvm/lib/loongarch/exception.S | 59 +++ .../selftests/kvm/lib/loongarch/processor.c | 349 ++++++++++++++++++ 2 files changed, 408 insertions(+) create mode 100644 tools/testing/selftests/kvm/lib/loongarch/exception.S create mode 100644 tools/testing/selftests/kvm/lib/loongarch/processor.c diff --git a/tools/testing/selftests/kvm/lib/loongarch/exception.S b/tools/testing/selftests/kvm/lib/loongarch/exception.S new file mode 100644 index 000000000000..88bfa505c6f5 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/loongarch/exception.S @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include "processor.h" + +/* address of refill exception should be 4K aligned */ +.balign 4096 +.global handle_tlb_refill +handle_tlb_refill: + csrwr t0, LOONGARCH_CSR_TLBRSAVE + csrrd t0, LOONGARCH_CSR_PGD + lddir t0, t0, 3 + lddir t0, t0, 1 + ldpte t0, 0 + ldpte t0, 1 + tlbfill + csrrd t0, LOONGARCH_CSR_TLBRSAVE + ertn + + /* + * save and restore all gprs except base register, + * and default value of base register is sp ($r3). + */ +.macro save_gprs base + .irp n,1,2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 + st.d $r\n, \base, 8 * \n + .endr +.endm + +.macro restore_gprs base + .irp n,1,2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 + ld.d $r\n, \base, 8 * \n + .endr +.endm + +/* address of general exception should be 4K aligned */ +.balign 4096 +.global handle_exception +handle_exception: + csrwr sp, LOONGARCH_CSR_KS0 + csrrd sp, LOONGARCH_CSR_KS1 + addi.d sp, sp, -EXREGS_SIZE + + save_gprs sp + /* save sp register to stack */ + csrrd t0, LOONGARCH_CSR_KS0 + st.d t0, sp, 3 * 8 + + csrrd t0, LOONGARCH_CSR_ERA + st.d t0, sp, PC_OFFSET_EXREGS + csrrd t0, LOONGARCH_CSR_ESTAT + st.d t0, sp, ESTAT_OFFSET_EXREGS + csrrd t0, LOONGARCH_CSR_BADV + st.d t0, sp, BADV_OFFSET_EXREGS + + or a0, sp, zero + bl route_exception + restore_gprs sp + csrrd sp, LOONGARCH_CSR_KS0 + ertn diff --git a/tools/testing/selftests/kvm/lib/loongarch/processor.c b/tools/testing/selftests/kvm/lib/loongarch/processor.c new file mode 100644 index 000000000000..25b7f896a107 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/loongarch/processor.c @@ -0,0 +1,349 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include + +#include "kvm_util.h" +#include "processor.h" +#include "ucall_common.h" + +#define LOONGARCH_GUEST_STACK_VADDR_MIN 0x200000 +#define LOONARCH_PAGE_TABLE_PHYS_MIN 0x200000 + +static vm_paddr_t invalid_pgtable[4]; +static uint64_t virt_pte_index(struct kvm_vm *vm, vm_vaddr_t gva, int level) +{ + unsigned int shift; + uint64_t mask; + + shift = level * (vm->page_shift - 3) + vm->page_shift; + mask = (1UL << (vm->page_shift - 3)) - 1; + return (gva >> shift) & mask; +} + +static uint64_t pte_addr(struct kvm_vm *vm, uint64_t entry) +{ + return entry & ~((0x1UL << vm->page_shift) - 1); +} + +static uint64_t ptrs_per_pte(struct kvm_vm *vm) +{ + return 1 << (vm->page_shift - 3); +} + +static void virt_set_pgtable(struct kvm_vm *vm, vm_paddr_t table, vm_paddr_t child) +{ + uint64_t *ptep; + int i, ptrs_per_pte; + + ptep = addr_gpa2hva(vm, table); + ptrs_per_pte = 1 << (vm->page_shift - 3); + for (i = 0; i < ptrs_per_pte; i++) + WRITE_ONCE(*(ptep + i), child); +} + +void virt_arch_pgd_alloc(struct kvm_vm *vm) +{ + int i; + vm_paddr_t child, table; + + if (vm->pgd_created) + return; + child = table = 0; + for (i = 0; i < vm->pgtable_levels; i++) { + invalid_pgtable[i] = child; + table = vm_phy_page_alloc(vm, LOONARCH_PAGE_TABLE_PHYS_MIN, + vm->memslots[MEM_REGION_PT]); + TEST_ASSERT(table, "Fail to allocate page tale at level %d\n", i); + virt_set_pgtable(vm, table, child); + child = table; + } + vm->pgd = table; + vm->pgd_created = true; +} + +static int virt_pte_none(uint64_t *ptep, int level) +{ + return *ptep == invalid_pgtable[level]; +} + +static uint64_t *virt_populate_pte(struct kvm_vm *vm, vm_vaddr_t gva, int alloc) +{ + uint64_t *ptep; + vm_paddr_t child; + int level; + + if (!vm->pgd_created) + goto unmapped_gva; + + level = vm->pgtable_levels - 1; + child = vm->pgd; + while (level > 0) { + ptep = addr_gpa2hva(vm, child) + virt_pte_index(vm, gva, level) * 8; + if (virt_pte_none(ptep, level)) { + if (alloc) { + child = vm_alloc_page_table(vm); + virt_set_pgtable(vm, child, invalid_pgtable[level - 1]); + WRITE_ONCE(*ptep, child); + } else + goto unmapped_gva; + + } else + child = pte_addr(vm, *ptep); + level--; + } + + ptep = addr_gpa2hva(vm, child) + virt_pte_index(vm, gva, level) * 8; + return ptep; + +unmapped_gva: + TEST_FAIL("No mapping for vm virtual address, gva: 0x%lx", gva); + exit(EXIT_FAILURE); +} + +vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) +{ + uint64_t *ptep; + + ptep = virt_populate_pte(vm, gva, 0); + TEST_ASSERT(*ptep != 0, "Virtual address vaddr: 0x%lx not mapped\n", gva); + + return pte_addr(vm, *ptep) + (gva & (vm->page_size - 1)); +} + +void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) +{ + uint32_t prot_bits; + uint64_t *ptep; + + TEST_ASSERT((vaddr % vm->page_size) == 0, + "Virtual address not on page boundary,\n" + "vaddr: 0x%lx vm->page_size: 0x%x", vaddr, vm->page_size); + TEST_ASSERT(sparsebit_is_set(vm->vpages_valid, + (vaddr >> vm->page_shift)), + "Invalid virtual address, vaddr: 0x%lx", vaddr); + TEST_ASSERT((paddr % vm->page_size) == 0, + "Physical address not on page boundary,\n" + "paddr: 0x%lx vm->page_size: 0x%x", paddr, vm->page_size); + TEST_ASSERT((paddr >> vm->page_shift) <= vm->max_gfn, + "Physical address beyond maximum supported,\n" + "paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x", + paddr, vm->max_gfn, vm->page_size); + + ptep = virt_populate_pte(vm, vaddr, 1); + prot_bits = _PAGE_PRESENT | __READABLE | __WRITEABLE | _CACHE_CC; + prot_bits |= _PAGE_USER; + WRITE_ONCE(*ptep, paddr | prot_bits); +} + +static void pte_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent, uint64_t page, int level) +{ + static const char * const type[] = { "pte", "pmd", "pud", "pgd"}; + uint64_t pte, *ptep; + + if (level < 0) + return; + + for (pte = page; pte < page + ptrs_per_pte(vm) * 8; pte += 8) { + ptep = addr_gpa2hva(vm, pte); + if (virt_pte_none(ptep, level)) + continue; + fprintf(stream, "%*s%s: %lx: %lx at %p\n", + indent, "", type[level], pte, *ptep, ptep); + pte_dump(stream, vm, indent + 1, pte_addr(vm, *ptep), level--); + } +} + +void virt_arch_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent) +{ + int level; + + if (!vm->pgd_created) + return; + + level = vm->pgtable_levels - 1; + pte_dump(stream, vm, indent, vm->pgd, level); +} + +void vcpu_arch_dump(FILE *stream, struct kvm_vcpu *vcpu, uint8_t indent) +{ +} + +void assert_on_unhandled_exception(struct kvm_vcpu *vcpu) +{ + struct ucall uc; + + if (get_ucall(vcpu, &uc) != UCALL_UNHANDLED) + return; + + TEST_FAIL("Unexpected exception (pc:0x%lx, estat:0x%lx, badv:0x%lx)", + uc.args[0], uc.args[1], uc.args[2]); +} + +void route_exception(struct ex_regs *regs) +{ + unsigned long pc, estat, badv; + + pc = regs->pc; + estat = regs->estat; + badv = regs->badv; + ucall(UCALL_UNHANDLED, 3, pc, estat, badv); + while (1) + ; +} + +void vcpu_args_set(struct kvm_vcpu *vcpu, unsigned int num, ...) +{ + va_list ap; + struct kvm_regs regs; + int i; + + TEST_ASSERT(num >= 1 && num <= 8, "Unsupported number of args,\n" + "num: %u\n", num); + + vcpu_regs_get(vcpu, ®s); + va_start(ap, num); + for (i = 0; i < num; i++) + regs.gpr[i + 4] = va_arg(ap, uint64_t); + va_end(ap); + vcpu_regs_set(vcpu, ®s); +} + +static void loongarch_get_csr(struct kvm_vcpu *vcpu, uint64_t id, void *addr) +{ + uint64_t csrid; + + csrid = KVM_REG_LOONGARCH_CSR | KVM_REG_SIZE_U64 | 8 * id; + __vcpu_get_reg(vcpu, csrid, addr); +} + +static void loongarch_set_csr(struct kvm_vcpu *vcpu, uint64_t id, uint64_t val) +{ + uint64_t csrid; + + csrid = KVM_REG_LOONGARCH_CSR | KVM_REG_SIZE_U64 | 8 * id; + vcpu_set_reg(vcpu, csrid, val); +} + +static void loongarch_vcpu_setup(struct kvm_vcpu *vcpu) +{ + unsigned long val; + int width; + struct kvm_vm *vm = vcpu->vm; + + switch (vm->mode) { + case VM_MODE_P48V48_16K: + case VM_MODE_P40V48_16K: + case VM_MODE_P36V48_16K: + case VM_MODE_P36V47_16K: + break; + + default: + TEST_FAIL("Unknown guest mode, mode: 0x%x", vm->mode); + } + + /* user mode and page enable mode */ + val = PLV_USER | CSR_CRMD_PG; + loongarch_set_csr(vcpu, LOONGARCH_CSR_CRMD, val); + loongarch_set_csr(vcpu, LOONGARCH_CSR_PRMD, val); + loongarch_set_csr(vcpu, LOONGARCH_CSR_EUEN, 1); + loongarch_set_csr(vcpu, LOONGARCH_CSR_ECFG, 0); + loongarch_set_csr(vcpu, LOONGARCH_CSR_TCFG, 0); + loongarch_set_csr(vcpu, LOONGARCH_CSR_ASID, 1); + + width = vm->page_shift - 3; + val = 0; + switch (vm->pgtable_levels) { + case 4: + /* pud page shift and width */ + val = (vm->page_shift + width * 2) << 20 | (width << 25); + /* fall throuth */ + case 3: + /* pmd page shift and width */ + val |= (vm->page_shift + width) << 10 | (width << 15); + /* pte page shift and width */ + val |= vm->page_shift | width << 5; + break; + default: + TEST_FAIL("Got %u page table levels, expected 3 or 4", vm->pgtable_levels); + } + loongarch_set_csr(vcpu, LOONGARCH_CSR_PWCTL0, val); + + /* PGD page shift and width */ + val = (vm->page_shift + width * (vm->pgtable_levels - 1)) | width << 6; + loongarch_set_csr(vcpu, LOONGARCH_CSR_PWCTL1, val); + loongarch_set_csr(vcpu, LOONGARCH_CSR_PGDL, vm->pgd); + + /* + * Refill exception runs on real mode + * Entry address should be physical address + */ + val = addr_gva2gpa(vm, (unsigned long)handle_tlb_refill); + loongarch_set_csr(vcpu, LOONGARCH_CSR_TLBRENTRY, val); + + /* + * General exception runs on page-enabled mode + * Entry address should be virtual address + */ + val = (unsigned long)handle_exception; + loongarch_set_csr(vcpu, LOONGARCH_CSR_EENTRY, val); + + loongarch_get_csr(vcpu, LOONGARCH_CSR_TLBIDX, &val); + val &= ~CSR_TLBIDX_SIZEM; + val |= PS_DEFAULT_SIZE << CSR_TLBIDX_SIZE; + loongarch_set_csr(vcpu, LOONGARCH_CSR_TLBIDX, val); + + loongarch_set_csr(vcpu, LOONGARCH_CSR_STLBPGSIZE, PS_DEFAULT_SIZE); + + /* LOONGARCH_CSR_KS1 is used for exception stack */ + val = __vm_vaddr_alloc(vm, vm->page_size, + LOONGARCH_GUEST_STACK_VADDR_MIN, MEM_REGION_DATA); + TEST_ASSERT(val != 0, "No memory for exception stack"); + val = val + vm->page_size; + loongarch_set_csr(vcpu, LOONGARCH_CSR_KS1, val); + + loongarch_get_csr(vcpu, LOONGARCH_CSR_TLBREHI, &val); + val &= ~CSR_TLBREHI_PS; + val |= PS_DEFAULT_SIZE << CSR_TLBREHI_PS_SHIFT; + loongarch_set_csr(vcpu, LOONGARCH_CSR_TLBREHI, val); + + loongarch_set_csr(vcpu, LOONGARCH_CSR_CPUID, vcpu->id); + loongarch_set_csr(vcpu, LOONGARCH_CSR_TMID, vcpu->id); +} + +static struct kvm_vcpu *loongarch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id) +{ + size_t stack_size; + uint64_t stack_vaddr; + struct kvm_regs regs; + struct kvm_vcpu *vcpu; + + vcpu = __vm_vcpu_add(vm, vcpu_id); + stack_size = vm->page_size; + stack_vaddr = __vm_vaddr_alloc(vm, stack_size, + LOONGARCH_GUEST_STACK_VADDR_MIN, MEM_REGION_DATA); + TEST_ASSERT(stack_vaddr != 0, "No memory for vm stack"); + + loongarch_vcpu_setup(vcpu); + /* Setup guest general purpose registers */ + vcpu_regs_get(vcpu, ®s); + regs.gpr[3] = stack_vaddr + stack_size; + vcpu_regs_set(vcpu, ®s); + + return vcpu; +} + +struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id) +{ + return loongarch_vcpu_add(vm, vcpu_id); +} + +void vcpu_arch_set_entry_point(struct kvm_vcpu *vcpu, void *guest_code) +{ + struct kvm_regs regs; + + /* Setup guest PC register */ + vcpu_regs_get(vcpu, ®s); + regs.pc = (uint64_t)guest_code; + vcpu_regs_set(vcpu, ®s); +} From patchwork Thu Apr 10 03:56:46 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 879937 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EE8491EF080; Thu, 10 Apr 2025 03:56:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8AxaeCCQfdn4JK2AA--.43290S3; Thu, 10 Apr 2025 11:56:50 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMBxHcV_QfdnQWl3AA--.27477S5; Thu, 10 Apr 2025 11:56:50 +0800 (CST) From: Bibo Mao To: Paolo Bonzini , Huacai Chen , Shuah Khan Cc: Sean Christopherson , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v8 3/4] KVM: selftests: Add ucall test support for LoongArch Date: Thu, 10 Apr 2025 11:56:46 +0800 Message-Id: <20250410035647.3501139-4-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250410035647.3501139-1-maobibo@loongson.cn> References: <20250410035647.3501139-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: qMiowMBxHcV_QfdnQWl3AA--.27477S5 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Add ucall test support for LoongArch, ucall method on LoongArch uses undefined mmio area. It will cause causes vcpu exits to hypervisor so that hypervisor can communicate with vcpu. Signed-off-by: Bibo Mao --- .../selftests/kvm/include/loongarch/ucall.h | 20 ++++++++++ .../selftests/kvm/lib/loongarch/ucall.c | 38 +++++++++++++++++++ 2 files changed, 58 insertions(+) create mode 100644 tools/testing/selftests/kvm/include/loongarch/ucall.h create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c diff --git a/tools/testing/selftests/kvm/include/loongarch/ucall.h b/tools/testing/selftests/kvm/include/loongarch/ucall.h new file mode 100644 index 000000000000..4ec801f37f00 --- /dev/null +++ b/tools/testing/selftests/kvm/include/loongarch/ucall.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef SELFTEST_KVM_UCALL_H +#define SELFTEST_KVM_UCALL_H + +#include "kvm_util.h" + +#define UCALL_EXIT_REASON KVM_EXIT_MMIO + +/* + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by each + * VM), it must not be accessed from host code. + */ +extern vm_vaddr_t *ucall_exit_mmio_addr; + +static inline void ucall_arch_do_ucall(vm_vaddr_t uc) +{ + WRITE_ONCE(*ucall_exit_mmio_addr, uc); +} + +#endif diff --git a/tools/testing/selftests/kvm/lib/loongarch/ucall.c b/tools/testing/selftests/kvm/lib/loongarch/ucall.c new file mode 100644 index 000000000000..fc6cbb50573f --- /dev/null +++ b/tools/testing/selftests/kvm/lib/loongarch/ucall.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ucall support. A ucall is a "hypercall to userspace". + * + */ +#include "kvm_util.h" + +/* + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by each + * VM), it must not be accessed from host code. + */ +vm_vaddr_t *ucall_exit_mmio_addr; + +void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) +{ + vm_vaddr_t mmio_gva = vm_vaddr_unused_gap(vm, vm->page_size, KVM_UTIL_MIN_VADDR); + + virt_map(vm, mmio_gva, mmio_gpa, 1); + + vm->ucall_mmio_addr = mmio_gpa; + + write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gva); +} + +void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu) +{ + struct kvm_run *run = vcpu->run; + + if (run->exit_reason == KVM_EXIT_MMIO && + run->mmio.phys_addr == vcpu->vm->ucall_mmio_addr) { + TEST_ASSERT(run->mmio.is_write && run->mmio.len == sizeof(uint64_t), + "Unexpected ucall exit mmio address access"); + + return (void *)(*((uint64_t *)run->mmio.data)); + } + + return NULL; +} From patchwork Thu Apr 10 03:56:47 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 879936 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 613071F0998; Thu, 10 Apr 2025 03:57:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744257423; cv=none; b=f8bg3wsIRmyNmV8CmKwc/ugWj7xBW+RN0AXXkjoUzxygZePzT15bdhpqfRLbiM62IP1tQkv+T32qf5gs+846U69orX3fN2VxBcCEX9C0iA79V8q57zKVgXWMPPtrvTbEbz5vS3TdZzbc3a2fxqVLXuFWTzl7H/lBXRxluwEQU6g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744257423; c=relaxed/simple; bh=BjAp374aSZZjMcZ2HJf3Qz6JlOzW03cKT3GvNtSjxxo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=JJCIp4NbT4TyvF8v/UaYrMuIUDKEVEmTMx1b6mj2LEptWxmD8A4jWDIugLFQhSFXpvkxDBAoTYXUfLXwEv4Osjux3WAtpKdq/jwAaEEqxhbhLMLRBqZ3qI74RiE1kV3Tkgv4xenjsDQovQYD7IRSX+taeLxhLcMLw94dCo5eqXA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8DxC3KFQfdn5JK2AA--.41740S3; Thu, 10 Apr 2025 11:56:53 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMBxHcV_QfdnQWl3AA--.27477S6; Thu, 10 Apr 2025 11:56:50 +0800 (CST) From: Bibo Mao To: Paolo Bonzini , Huacai Chen , Shuah Khan Cc: Sean Christopherson , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v8 4/4] KVM: selftests: Add test cases for LoongArch Date: Thu, 10 Apr 2025 11:56:47 +0800 Message-Id: <20250410035647.3501139-5-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250410035647.3501139-1-maobibo@loongson.cn> References: <20250410035647.3501139-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: qMiowMBxHcV_QfdnQWl3AA--.27477S6 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Some common KVM testcases are supported on LoongArch now as following: coalesced_io_test demand_paging_test dirty_log_perf_test dirty_log_test guest_print_test hardware_disable_test kvm_binary_stats_test kvm_create_max_vcpus kvm_page_table_test memslot_modification_stress_test memslot_perf_test set_memory_region_test And other test cases are not supported by LoongArch such as rseq_test, since it is not supported on LoongArch physical machine neither. Signed-off-by: Bibo Mao --- tools/testing/selftests/kvm/Makefile | 2 +- tools/testing/selftests/kvm/Makefile.kvm | 18 ++++++++++++++++++ .../selftests/kvm/set_memory_region_test.c | 2 +- 3 files changed, 20 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 20af35a91d6f..d9fffe06d3ea 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -3,7 +3,7 @@ top_srcdir = ../../../.. include $(top_srcdir)/scripts/subarch.include ARCH ?= $(SUBARCH) -ifeq ($(ARCH),$(filter $(ARCH),arm64 s390 riscv x86 x86_64)) +ifeq ($(ARCH),$(filter $(ARCH),arm64 s390 riscv x86 x86_64 loongarch)) # Top-level selftests allows ARCH=x86_64 :-( ifeq ($(ARCH),x86_64) ARCH := x86 diff --git a/tools/testing/selftests/kvm/Makefile.kvm b/tools/testing/selftests/kvm/Makefile.kvm index f773f8f99249..4704ab16f19f 100644 --- a/tools/testing/selftests/kvm/Makefile.kvm +++ b/tools/testing/selftests/kvm/Makefile.kvm @@ -47,6 +47,10 @@ LIBKVM_riscv += lib/riscv/handlers.S LIBKVM_riscv += lib/riscv/processor.c LIBKVM_riscv += lib/riscv/ucall.c +LIBKVM_loongarch += lib/loongarch/processor.c +LIBKVM_loongarch += lib/loongarch/ucall.c +LIBKVM_loongarch += lib/loongarch/exception.S + # Non-compiled test targets TEST_PROGS_x86 += x86/nx_huge_pages_test.sh @@ -205,6 +209,20 @@ TEST_GEN_PROGS_riscv += kvm_page_table_test TEST_GEN_PROGS_riscv += set_memory_region_test TEST_GEN_PROGS_riscv += steal_time +TEST_GEN_PROGS_loongarch += coalesced_io_test +TEST_GEN_PROGS_loongarch += demand_paging_test +TEST_GEN_PROGS_loongarch += dirty_log_perf_test +TEST_GEN_PROGS_loongarch += dirty_log_test +TEST_GEN_PROGS_loongarch += demand_paging_test +TEST_GEN_PROGS_loongarch += guest_print_test +TEST_GEN_PROGS_loongarch += hardware_disable_test +TEST_GEN_PROGS_loongarch += kvm_binary_stats_test +TEST_GEN_PROGS_loongarch += kvm_create_max_vcpus +TEST_GEN_PROGS_loongarch += kvm_page_table_test +TEST_GEN_PROGS_loongarch += memslot_modification_stress_test +TEST_GEN_PROGS_loongarch += memslot_perf_test +TEST_GEN_PROGS_loongarch += set_memory_region_test + SPLIT_TESTS += arch_timer SPLIT_TESTS += get-reg-list diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c index bc440d5aba57..ce3ac0fd6dfb 100644 --- a/tools/testing/selftests/kvm/set_memory_region_test.c +++ b/tools/testing/selftests/kvm/set_memory_region_test.c @@ -350,7 +350,7 @@ static void test_invalid_memory_region_flags(void) struct kvm_vm *vm; int r, i; -#if defined __aarch64__ || defined __riscv || defined __x86_64__ +#if defined __aarch64__ || defined __riscv || defined __x86_64__ || defined __loongarch__ supported_flags |= KVM_MEM_READONLY; #endif