From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B459FECAAD8 for ; Tue, 20 Sep 2022 04:15:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230114AbiITEPt (ORCPT ); Tue, 20 Sep 2022 00:15:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229908AbiITEPi (ORCPT ); Tue, 20 Sep 2022 00:15:38 -0400 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C256A43339 for ; Mon, 19 Sep 2022 21:15:32 -0700 (PDT) Received: by mail-pg1-x549.google.com with SMTP id s15-20020a63524f000000b0043891d55a30so812706pgl.16 for ; Mon, 19 Sep 2022 21:15:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date; bh=3IXMWWfhtSsnWeEyyRGnY8bQzfkxRCulrm5lrBr2778=; b=HqIras6OrXifXEJ2Qi2ZLU7qF0oQKywtXsLvz6sAIHSTA0Wi6ta86vc5lJrAxLNSMi /Aez3IGNCp3wz5W9xl+e5wwDQwBnBCAFgAU60Wl9DPllXL3zo68zav7xcEZDryjj5ArX 8KgJksHVoy6Ckszk3kwztXywShkxUKHralVmy9fmQFZzkhbvu4tSCm0Mohe2iYTHtsFB R/L6gco9DVXoBa0/+NiXvh7P1DbdZ4kxZErAUS4NP7hTeYll3duaSxFG7PVAF8ffwJLC pThEg/5Ctqt5rsCWCglGu5+gRy1OKVQn4PIa8RP8XOc2Dsu+KhqUUtSNwLvTT6S7nu9n Wk0w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=3IXMWWfhtSsnWeEyyRGnY8bQzfkxRCulrm5lrBr2778=; b=sM8mAnTMastx0WyYChZtTShht1gAE50Q9lGkqmKCbZ5w5qWENrkEha3axHYPzPdvwM hZaC//wwDVML+p6LSpCS2kUq3axY/Wa3lAcJxxtFc+ZVI/FKNYmqVydZTygh4fyVIFZG GbQbmmUSNxpTQrBJ5AxhQN2POCyluqUkpeGbgc4gcP/CfSB3PG80qcINaMv7bgF4LGWd NF0iK3w5jJYCFzxvIikomGedbx1wV+MLWbC1COLpbfYETn8JXRvB/crMHS7zevsyFmYI 014labIwEkuLQtLJND9f/6TwaN0uvoeXCZA8xn7RCljN+9IwtYhuY2BLnRD8JBRw0uBt T3lA== X-Gm-Message-State: ACrzQf0Zi7SOqQEAJEY/DPEgbNM7xCLC5vvt/nkoH0TkP271YY6f7J56 CScGTm5cSFk30ynO2SCg56ud6j3M6f1JOpxmPpngbIqXtPnXADmtSHYleYIC//goMB7cWcvagVX H2XBFNur/htFDu69zze9MoYjfxJs6uXaU32jq3cu0V8QBNWTYv/lOHeImhJomYC0= X-Google-Smtp-Source: AMsMyM5uPS3nbdKQXMQGEozz2wSqm+MFNrHvMq3oU+cJfx4UlcuRkZv4apjvUpRz1nd0mCuFtUhRrCPu4iUgCQ== X-Received: from ricarkol4.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:1248]) (user=ricarkol job=sendgmr) by 2002:a05:6a00:1a08:b0:545:362c:b219 with SMTP id g8-20020a056a001a0800b00545362cb219mr22264440pfv.27.1663647331691; Mon, 19 Sep 2022 21:15:31 -0700 (PDT) Date: Tue, 20 Sep 2022 04:15:08 +0000 In-Reply-To: <20220920041509.3131141-1-ricarkol@google.com> Mime-Version: 1.0 References: <20220920041509.3131141-1-ricarkol@google.com> X-Mailer: git-send-email 2.37.3.968.ga6b4b080e4-goog Message-ID: <20220920041509.3131141-13-ricarkol@google.com> Subject: [PATCH v6 12/13] KVM: selftests: aarch64: Add readonly memslot tests into page_fault_test From: Ricardo Koller To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, andrew.jones@linux.dev Cc: pbonzini@redhat.com, maz@kernel.org, seanjc@google.com, alexandru.elisei@arm.com, eric.auger@redhat.com, oupton@google.com, reijiw@google.com, rananta@google.com, bgardon@google.com, dmatlack@google.com, axelrasmussen@google.com, Ricardo Koller Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add some readonly memslot tests into page_fault_test. Mark the data and/or page-table memslots as readonly, perform some accesses, and check that the right fault is triggered when expected (e.g., a store with no write-back should lead to an mmio exit). Signed-off-by: Ricardo Koller --- .../selftests/kvm/aarch64/page_fault_test.c | 101 +++++++++++++++++- 1 file changed, 100 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c index 51b2ac260db5..386c20b47723 100644 --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c @@ -41,6 +41,8 @@ static uint64_t *guest_test_memory = (uint64_t *)TEST_GVA; #define CHECK_FN_NR 10 static struct event_cnt { + int mmio_exits; + int fail_vcpu_runs; int uffd_faults; /* uffd_faults is incremented from multiple threads. */ pthread_mutex_t uffd_faults_mutex; @@ -57,6 +59,8 @@ struct test_desc { uffd_handler_t uffd_data_handler; void (*dabt_handler)(struct ex_regs *regs); void (*iabt_handler)(struct ex_regs *regs); + void (*mmio_handler)(struct kvm_vm *vm, struct kvm_run *run); + void (*fail_vcpu_run_handler)(int ret); uint32_t pt_memslot_flags; uint32_t data_memslot_flags; bool skip; @@ -418,6 +422,31 @@ static bool punch_hole_in_memslot(struct kvm_vm *vm, return true; } +static void mmio_on_test_gpa_handler(struct kvm_vm *vm, struct kvm_run *run) +{ + struct userspace_mem_region *region; + void *hva; + + region = vm_get_mem_region(vm, MEM_REGION_DATA); + hva = (void *)region->region.userspace_addr; + + ASSERT_EQ(run->mmio.phys_addr, region->region.guest_phys_addr); + + memcpy(hva, run->mmio.data, run->mmio.len); + events.mmio_exits += 1; +} + +static void mmio_no_handler(struct kvm_vm *vm, struct kvm_run *run) +{ + uint64_t data; + + memcpy(&data, run->mmio.data, sizeof(data)); + pr_debug("addr=%lld len=%d w=%d data=%lx\n", + run->mmio.phys_addr, run->mmio.len, + run->mmio.is_write, data); + TEST_FAIL("There was no MMIO exit expected."); +} + static bool check_write_in_dirty_log(struct kvm_vm *vm, struct userspace_mem_region *region, uint64_t host_pg_nr) { @@ -465,6 +494,18 @@ static bool handle_cmd(struct kvm_vm *vm, int cmd) return continue_test; } +void fail_vcpu_run_no_handler(int ret) +{ + TEST_FAIL("Unexpected vcpu run failure\n"); +} + +void fail_vcpu_run_mmio_no_syndrome_handler(int ret) +{ + TEST_ASSERT(errno == ENOSYS, + "The mmio handler should have returned not implemented."); + events.fail_vcpu_runs += 1; +} + typedef uint32_t aarch64_insn_t; extern aarch64_insn_t __exec_test[2]; @@ -570,9 +611,20 @@ static void setup_memslots(struct kvm_vm *vm, struct test_params *p) vm->memslots[MEM_REGION_DATA] = DATA_MEMSLOT; } +static void setup_default_handlers(struct test_desc *test) +{ + if (!test->mmio_handler) + test->mmio_handler = mmio_no_handler; + + if (!test->fail_vcpu_run_handler) + test->fail_vcpu_run_handler = fail_vcpu_run_no_handler; +} + static void check_event_counts(struct test_desc *test) { ASSERT_EQ(test->expected_events.uffd_faults, events.uffd_faults); + ASSERT_EQ(test->expected_events.mmio_exits, events.mmio_exits); + ASSERT_EQ(test->expected_events.fail_vcpu_runs, events.fail_vcpu_runs); } static void print_test_banner(enum vm_guest_mode mode, struct test_params *p) @@ -597,10 +649,18 @@ static void reset_event_counts(void) static void vcpu_run_loop(struct kvm_vm *vm, struct kvm_vcpu *vcpu, struct test_desc *test) { + struct kvm_run *run; struct ucall uc; + int ret; + + run = vcpu->run; for (;;) { - vcpu_run(vcpu); + ret = _vcpu_run(vcpu); + if (ret) { + test->fail_vcpu_run_handler(ret); + goto done; + } switch (get_ucall(vcpu, &uc)) { case UCALL_SYNC: @@ -614,6 +674,10 @@ static void vcpu_run_loop(struct kvm_vm *vm, struct kvm_vcpu *vcpu, break; case UCALL_DONE: goto done; + case UCALL_NONE: + if (run->exit_reason == KVM_EXIT_MMIO) + test->mmio_handler(vm, run); + break; default: TEST_FAIL("Unknown ucall %lu", uc.cmd); } @@ -654,6 +718,7 @@ static void run_test(enum vm_guest_mode mode, void *arg) load_exec_code_for_test(vm); setup_uffd(vm, p, &pt_uffd, &data_uffd); setup_abort_handlers(vm, vcpu, test); + setup_default_handlers(test); vcpu_args_set(vcpu, 1, test); vcpu_run_loop(vm, vcpu, test); @@ -741,6 +806,25 @@ static void help(char *name) .expected_events = { 0 }, \ } +#define TEST_RO_MEMSLOT(_access, _mmio_handler, _mmio_exits) \ +{ \ + .name = SCAT3(ro_memslot, _access, _with_af), \ + .data_memslot_flags = KVM_MEM_READONLY, \ + .guest_prepare = { _PREPARE(_access) }, \ + .guest_test = _access, \ + .mmio_handler = _mmio_handler, \ + .expected_events = { .mmio_exits = _mmio_exits }, \ +} + +#define TEST_RO_MEMSLOT_NO_SYNDROME(_access) \ +{ \ + .name = SCAT2(ro_memslot_no_syndrome, _access), \ + .data_memslot_flags = KVM_MEM_READONLY, \ + .guest_test = _access, \ + .fail_vcpu_run_handler = fail_vcpu_run_mmio_no_syndrome_handler, \ + .expected_events = { .fail_vcpu_runs = 1 }, \ +} + static struct test_desc tests[] = { /* Check that HW is setting the Access Flag (AF) (sanity checks). */ @@ -809,6 +893,21 @@ static struct test_desc tests[] = { TEST_DIRTY_LOG(guest_dc_zva, with_af, guest_check_write_in_dirty_log), TEST_DIRTY_LOG(guest_st_preidx, with_af, guest_check_write_in_dirty_log), + /* + * Try accesses when the data memslot is marked read-only (with + * KVM_MEM_READONLY). Writes with a syndrome result in an MMIO exit, + * writes with no syndrome (e.g., CAS) result in a failed vcpu run, and + * reads/execs with and without syndroms do not fault. + */ + TEST_RO_MEMSLOT(guest_read64, 0, 0), + TEST_RO_MEMSLOT(guest_ld_preidx, 0, 0), + TEST_RO_MEMSLOT(guest_at, 0, 0), + TEST_RO_MEMSLOT(guest_exec, 0, 0), + TEST_RO_MEMSLOT(guest_write64, mmio_on_test_gpa_handler, 1), + TEST_RO_MEMSLOT_NO_SYNDROME(guest_dc_zva), + TEST_RO_MEMSLOT_NO_SYNDROME(guest_cas), + TEST_RO_MEMSLOT_NO_SYNDROME(guest_st_preidx), + { 0 } }; -- 2.37.3.968.ga6b4b080e4-goog From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91B00C6FA82 for ; Tue, 20 Sep 2022 04:15:39 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4BBB94B69D; Tue, 20 Sep 2022 00:15:39 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id N5RTxwwyFicj; Tue, 20 Sep 2022 00:15:38 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 365074B750; Tue, 20 Sep 2022 00:15:38 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id CD40A4B6EE for ; Tue, 20 Sep 2022 00:15:36 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QtLT4jMSH+el for ; Tue, 20 Sep 2022 00:15:35 -0400 (EDT) Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id A767F4B62F for ; Tue, 20 Sep 2022 00:15:32 -0400 (EDT) Received: by mail-pg1-f201.google.com with SMTP id w1-20020a63d741000000b0042c254a4ccdso827646pgi.15 for ; Mon, 19 Sep 2022 21:15:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date; bh=3IXMWWfhtSsnWeEyyRGnY8bQzfkxRCulrm5lrBr2778=; b=HqIras6OrXifXEJ2Qi2ZLU7qF0oQKywtXsLvz6sAIHSTA0Wi6ta86vc5lJrAxLNSMi /Aez3IGNCp3wz5W9xl+e5wwDQwBnBCAFgAU60Wl9DPllXL3zo68zav7xcEZDryjj5ArX 8KgJksHVoy6Ckszk3kwztXywShkxUKHralVmy9fmQFZzkhbvu4tSCm0Mohe2iYTHtsFB R/L6gco9DVXoBa0/+NiXvh7P1DbdZ4kxZErAUS4NP7hTeYll3duaSxFG7PVAF8ffwJLC pThEg/5Ctqt5rsCWCglGu5+gRy1OKVQn4PIa8RP8XOc2Dsu+KhqUUtSNwLvTT6S7nu9n Wk0w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=3IXMWWfhtSsnWeEyyRGnY8bQzfkxRCulrm5lrBr2778=; b=mPd103u96O4v8yZceCbz4GFbV7nx1qtmmEvnhrdeoD1i+lH8NhOOLdHljccVE7THYM xKlllkkJRb1ia6nLH/yS7ocrPYfdCYTEjHuVumJbRIrDksi1lcAVcymf0LvnZV2pEPCX L1FfcWywhHXPgkd8eEnYSHDfTEUcg6F7AfgSzgpdvubbScOe3UB6H+kD2aLnZTLcqJ4v 2gl7/tXLjPtaoyvdOPexjSDzPwtmH1MnDXEWwcY/KvijYQbY4mqBjuXdITJ9Lwp0jdVQ K1jsGg687MSfduXt3eHAAx5S0rbI/eFM7YMqLDJFse6glwzvTZ4yl9fQicQy/61OeIBR IQig== X-Gm-Message-State: ACrzQf0lzVNRH3mTyadOTVmIQfiv4jVgHeWWW/MboLbVjTIiq2oB4f58 KfnlFExstNZKOTFJwyMVamEfc/nmvwXDlQ== X-Google-Smtp-Source: AMsMyM5uPS3nbdKQXMQGEozz2wSqm+MFNrHvMq3oU+cJfx4UlcuRkZv4apjvUpRz1nd0mCuFtUhRrCPu4iUgCQ== X-Received: from ricarkol4.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:1248]) (user=ricarkol job=sendgmr) by 2002:a05:6a00:1a08:b0:545:362c:b219 with SMTP id g8-20020a056a001a0800b00545362cb219mr22264440pfv.27.1663647331691; Mon, 19 Sep 2022 21:15:31 -0700 (PDT) Date: Tue, 20 Sep 2022 04:15:08 +0000 In-Reply-To: <20220920041509.3131141-1-ricarkol@google.com> Mime-Version: 1.0 References: <20220920041509.3131141-1-ricarkol@google.com> X-Mailer: git-send-email 2.37.3.968.ga6b4b080e4-goog Message-ID: <20220920041509.3131141-13-ricarkol@google.com> Subject: [PATCH v6 12/13] KVM: selftests: aarch64: Add readonly memslot tests into page_fault_test From: Ricardo Koller To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, andrew.jones@linux.dev Cc: maz@kernel.org, bgardon@google.com, pbonzini@redhat.com, axelrasmussen@google.com, dmatlack@google.com X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Add some readonly memslot tests into page_fault_test. Mark the data and/or page-table memslots as readonly, perform some accesses, and check that the right fault is triggered when expected (e.g., a store with no write-back should lead to an mmio exit). Signed-off-by: Ricardo Koller --- .../selftests/kvm/aarch64/page_fault_test.c | 101 +++++++++++++++++- 1 file changed, 100 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c index 51b2ac260db5..386c20b47723 100644 --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c @@ -41,6 +41,8 @@ static uint64_t *guest_test_memory = (uint64_t *)TEST_GVA; #define CHECK_FN_NR 10 static struct event_cnt { + int mmio_exits; + int fail_vcpu_runs; int uffd_faults; /* uffd_faults is incremented from multiple threads. */ pthread_mutex_t uffd_faults_mutex; @@ -57,6 +59,8 @@ struct test_desc { uffd_handler_t uffd_data_handler; void (*dabt_handler)(struct ex_regs *regs); void (*iabt_handler)(struct ex_regs *regs); + void (*mmio_handler)(struct kvm_vm *vm, struct kvm_run *run); + void (*fail_vcpu_run_handler)(int ret); uint32_t pt_memslot_flags; uint32_t data_memslot_flags; bool skip; @@ -418,6 +422,31 @@ static bool punch_hole_in_memslot(struct kvm_vm *vm, return true; } +static void mmio_on_test_gpa_handler(struct kvm_vm *vm, struct kvm_run *run) +{ + struct userspace_mem_region *region; + void *hva; + + region = vm_get_mem_region(vm, MEM_REGION_DATA); + hva = (void *)region->region.userspace_addr; + + ASSERT_EQ(run->mmio.phys_addr, region->region.guest_phys_addr); + + memcpy(hva, run->mmio.data, run->mmio.len); + events.mmio_exits += 1; +} + +static void mmio_no_handler(struct kvm_vm *vm, struct kvm_run *run) +{ + uint64_t data; + + memcpy(&data, run->mmio.data, sizeof(data)); + pr_debug("addr=%lld len=%d w=%d data=%lx\n", + run->mmio.phys_addr, run->mmio.len, + run->mmio.is_write, data); + TEST_FAIL("There was no MMIO exit expected."); +} + static bool check_write_in_dirty_log(struct kvm_vm *vm, struct userspace_mem_region *region, uint64_t host_pg_nr) { @@ -465,6 +494,18 @@ static bool handle_cmd(struct kvm_vm *vm, int cmd) return continue_test; } +void fail_vcpu_run_no_handler(int ret) +{ + TEST_FAIL("Unexpected vcpu run failure\n"); +} + +void fail_vcpu_run_mmio_no_syndrome_handler(int ret) +{ + TEST_ASSERT(errno == ENOSYS, + "The mmio handler should have returned not implemented."); + events.fail_vcpu_runs += 1; +} + typedef uint32_t aarch64_insn_t; extern aarch64_insn_t __exec_test[2]; @@ -570,9 +611,20 @@ static void setup_memslots(struct kvm_vm *vm, struct test_params *p) vm->memslots[MEM_REGION_DATA] = DATA_MEMSLOT; } +static void setup_default_handlers(struct test_desc *test) +{ + if (!test->mmio_handler) + test->mmio_handler = mmio_no_handler; + + if (!test->fail_vcpu_run_handler) + test->fail_vcpu_run_handler = fail_vcpu_run_no_handler; +} + static void check_event_counts(struct test_desc *test) { ASSERT_EQ(test->expected_events.uffd_faults, events.uffd_faults); + ASSERT_EQ(test->expected_events.mmio_exits, events.mmio_exits); + ASSERT_EQ(test->expected_events.fail_vcpu_runs, events.fail_vcpu_runs); } static void print_test_banner(enum vm_guest_mode mode, struct test_params *p) @@ -597,10 +649,18 @@ static void reset_event_counts(void) static void vcpu_run_loop(struct kvm_vm *vm, struct kvm_vcpu *vcpu, struct test_desc *test) { + struct kvm_run *run; struct ucall uc; + int ret; + + run = vcpu->run; for (;;) { - vcpu_run(vcpu); + ret = _vcpu_run(vcpu); + if (ret) { + test->fail_vcpu_run_handler(ret); + goto done; + } switch (get_ucall(vcpu, &uc)) { case UCALL_SYNC: @@ -614,6 +674,10 @@ static void vcpu_run_loop(struct kvm_vm *vm, struct kvm_vcpu *vcpu, break; case UCALL_DONE: goto done; + case UCALL_NONE: + if (run->exit_reason == KVM_EXIT_MMIO) + test->mmio_handler(vm, run); + break; default: TEST_FAIL("Unknown ucall %lu", uc.cmd); } @@ -654,6 +718,7 @@ static void run_test(enum vm_guest_mode mode, void *arg) load_exec_code_for_test(vm); setup_uffd(vm, p, &pt_uffd, &data_uffd); setup_abort_handlers(vm, vcpu, test); + setup_default_handlers(test); vcpu_args_set(vcpu, 1, test); vcpu_run_loop(vm, vcpu, test); @@ -741,6 +806,25 @@ static void help(char *name) .expected_events = { 0 }, \ } +#define TEST_RO_MEMSLOT(_access, _mmio_handler, _mmio_exits) \ +{ \ + .name = SCAT3(ro_memslot, _access, _with_af), \ + .data_memslot_flags = KVM_MEM_READONLY, \ + .guest_prepare = { _PREPARE(_access) }, \ + .guest_test = _access, \ + .mmio_handler = _mmio_handler, \ + .expected_events = { .mmio_exits = _mmio_exits }, \ +} + +#define TEST_RO_MEMSLOT_NO_SYNDROME(_access) \ +{ \ + .name = SCAT2(ro_memslot_no_syndrome, _access), \ + .data_memslot_flags = KVM_MEM_READONLY, \ + .guest_test = _access, \ + .fail_vcpu_run_handler = fail_vcpu_run_mmio_no_syndrome_handler, \ + .expected_events = { .fail_vcpu_runs = 1 }, \ +} + static struct test_desc tests[] = { /* Check that HW is setting the Access Flag (AF) (sanity checks). */ @@ -809,6 +893,21 @@ static struct test_desc tests[] = { TEST_DIRTY_LOG(guest_dc_zva, with_af, guest_check_write_in_dirty_log), TEST_DIRTY_LOG(guest_st_preidx, with_af, guest_check_write_in_dirty_log), + /* + * Try accesses when the data memslot is marked read-only (with + * KVM_MEM_READONLY). Writes with a syndrome result in an MMIO exit, + * writes with no syndrome (e.g., CAS) result in a failed vcpu run, and + * reads/execs with and without syndroms do not fault. + */ + TEST_RO_MEMSLOT(guest_read64, 0, 0), + TEST_RO_MEMSLOT(guest_ld_preidx, 0, 0), + TEST_RO_MEMSLOT(guest_at, 0, 0), + TEST_RO_MEMSLOT(guest_exec, 0, 0), + TEST_RO_MEMSLOT(guest_write64, mmio_on_test_gpa_handler, 1), + TEST_RO_MEMSLOT_NO_SYNDROME(guest_dc_zva), + TEST_RO_MEMSLOT_NO_SYNDROME(guest_cas), + TEST_RO_MEMSLOT_NO_SYNDROME(guest_st_preidx), + { 0 } }; -- 2.37.3.968.ga6b4b080e4-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm