[11/17] KVM: selftests: aarch64: level-sensitive interrupts tests in vgic_irq

Message ID	20211109023906.1091208-12-ricarkol@google.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <kvm-owner@kernel.org> Date: Mon, 8 Nov 2021 18:39:00 -0800 In-Reply-To: <20211109023906.1091208-1-ricarkol@google.com> Message-Id: <20211109023906.1091208-12-ricarkol@google.com> Mime-Version: 1.0 References: <20211109023906.1091208-1-ricarkol@google.com> Subject: [PATCH 11/17] KVM: selftests: aarch64: level-sensitive interrupts tests in vgic_irq From: Ricardo Koller <ricarkol@google.com> To: kvm@vger.kernel.org, maz@kernel.org, kvmarm@lists.cs.columbia.edu, drjones@redhat.com, eric.auger@redhat.com, alexandru.elisei@arm.com Cc: Paolo Bonzini <pbonzini@redhat.com>, oupton@google.com, james.morse@arm.com, suzuki.poulose@arm.com, shuah@kernel.org, jingzhangos@google.com, pshier@google.com, rananta@google.com, reijiw@google.com, Ricardo Koller <ricarkol@google.com> Content-Type: text/plain; charset="UTF-8" Precedence: bulk
Series	KVM: selftests: aarch64: Test userspace IRQ injection \| expand [00/17] KVM: selftests: aarch64: Test userspace IRQ injection [01/17] KVM: selftests: aarch64: move gic_v3.h to shared headers [02/17] KVM: selftests: aarch64: add function for accessing GICv3 dist and redist registers [03/17] KVM: selftests: aarch64: add GICv3 register accessor library functions [04/17] KVM: selftests: add kvm_irq_line library function [05/17] KVM: selftests: aarch64: add vGIC library functions to deal with vIRQ state [06/17] KVM: selftests: aarch64: add vgic_irq to test userspace IRQ injection [07/17] KVM: selftests: aarch64: abstract the injection functions in vgic_irq [08/17] KVM: selftests: aarch64: cmdline arg to set number of IRQs in vgic_irq test [09/17] KVM: selftests: aarch64: cmdline arg to set EOI mode in vgic_irq [10/17] KVM: selftests: aarch64: add preemption tests in vgic_irq [11/17] KVM: selftests: aarch64: level-sensitive interrupts tests in vgic_irq [12/17] KVM: selftests: aarch64: add tests for LEVEL_INFO in vgic_irq [13/17] KVM: selftests: aarch64: add test_inject_fail to vgic_irq [14/17] KVM: selftests: add IRQ GSI routing library functions [15/17] KVM: selftests: aarch64: add tests for IRQFD in vgic_irq [16/17] KVM: selftests: aarch64: add ISPENDR write tests in vgic_irq [17/17] KVM: selftests: aarch64: add test for restoring active IRQs

diff --git a/tools/testing/selftests/kvm/aarch64/vgic_irq.c b/tools/testing/selftests/kvm/aarch64/vgic_irq.c index b9080aa75a14..a20d225367a1 100644 --- a/tools/testing/selftests/kvm/aarch64/vgic_irq.c +++ b/tools/testing/selftests/kvm/aarch64/vgic_irq.c @@ -30,6 +30,7 @@ struct test_args { uint32_t nr_irqs; /* number of KVM supported IRQs. */ bool eoi_split; /* 1 is eoir+dir, 0 is eoir only */ + bool level_sensitive; /* 1 is level, 0 is edge */ }; /* @@ -57,27 +58,31 @@ static void *redist = (void *)GICR_BASE_GPA; typedef enum { KVM_INJECT_EDGE_IRQ_LINE = 1, + KVM_SET_IRQ_LINE, + KVM_SET_IRQ_LINE_HIGH, } kvm_inject_cmd; struct kvm_inject_args { kvm_inject_cmd cmd; uint32_t first_intid; uint32_t num; + int level; }; /* Used on the guest side to perform the hypercall. */ -static void kvm_inject_call(kvm_inject_cmd cmd, uint32_t first_intid, uint32_t num); - -#define KVM_INJECT(cmd, intid) \ - kvm_inject_call(cmd, intid, 1) - -#define KVM_INJECT_MULTI(cmd, intid, num) \ - kvm_inject_call(cmd, intid, num) +static void kvm_inject_call(kvm_inject_cmd cmd, uint32_t first_intid, + uint32_t num, int level); /* Used on the host side to get the hypercall info. */ static void kvm_inject_get_call(struct kvm_vm *vm, struct ucall *uc, struct kvm_inject_args *args); +#define KVM_INJECT(cmd, intid) \ + kvm_inject_call(cmd, intid, 1, -1 /* not used */) + +#define KVM_INJECT_MULTI(cmd, intid, num) \ + kvm_inject_call(cmd, intid, num, -1 /* not used */) + struct kvm_inject_desc { kvm_inject_cmd cmd; /* can inject PPIs, PPIs, and/or SPIs. */ @@ -90,6 +95,12 @@ static struct kvm_inject_desc inject_edge_fns[] = { { 0, }, }; +static struct kvm_inject_desc inject_level_fns[] = { + /* sgi ppi spi */ + { KVM_SET_IRQ_LINE_HIGH, false, true, true }, + { 0, }, +}; + #define for_each_inject_fn(t, f) \ for ((f) = (t); (f)->cmd; (f)++) @@ -114,7 +125,9 @@ static uint64_t gic_read_ap1r0(void) return reg; } -static void guest_irq_generic_handler(bool eoi_split) +static void guest_set_irq_line(uint32_t intid, uint32_t level); + +static void guest_irq_generic_handler(bool eoi_split, bool level_sensitive) { uint32_t intid = gic_get_and_ack_irq(); @@ -123,7 +136,11 @@ static void guest_irq_generic_handler(bool eoi_split) GUEST_ASSERT(gic_irq_get_active(intid)); - GUEST_ASSERT(!gic_irq_get_pending(intid)); + if (!level_sensitive) + GUEST_ASSERT(!gic_irq_get_pending(intid)); + + if (level_sensitive) + guest_set_irq_line(intid, 0); GUEST_ASSERT(intid < MAX_SPI); irqnr_received[intid] += 1; @@ -138,12 +155,14 @@ static void guest_irq_generic_handler(bool eoi_split) GUEST_ASSERT(!gic_irq_get_pending(intid)); } -static void kvm_inject_call(kvm_inject_cmd cmd, uint32_t first_intid, uint32_t num) +static void kvm_inject_call(kvm_inject_cmd cmd, uint32_t first_intid, + uint32_t num, int level) { struct kvm_inject_args args = { .cmd = cmd, .first_intid = first_intid, .num = num, + .level = level, }; GUEST_SYNC(&args); } @@ -158,19 +177,21 @@ do { \ #define CAT_HELPER(a, b) a ## b #define CAT(a, b) CAT_HELPER(a, b) #define PREFIX guest_irq_handler_ -#define GUEST_IRQ_HANDLER_NAME(split) CAT(PREFIX, split) -#define GENERATE_GUEST_IRQ_HANDLER(split) \ -static void CAT(PREFIX, split)(struct ex_regs *regs) \ +#define GUEST_IRQ_HANDLER_NAME(split, lev) CAT(PREFIX, CAT(split, lev)) +#define GENERATE_GUEST_IRQ_HANDLER(split, lev) \ +static void CAT(PREFIX, CAT(split, lev))(struct ex_regs *regs) \ { \ - guest_irq_generic_handler(split); \ + guest_irq_generic_handler(split, lev); \ } -GENERATE_GUEST_IRQ_HANDLER(0); -GENERATE_GUEST_IRQ_HANDLER(1); +GENERATE_GUEST_IRQ_HANDLER(0, 0); +GENERATE_GUEST_IRQ_HANDLER(0, 1); +GENERATE_GUEST_IRQ_HANDLER(1, 0); +GENERATE_GUEST_IRQ_HANDLER(1, 1); -static void (*guest_irq_handlers[2])(struct ex_regs *) = { - GUEST_IRQ_HANDLER_NAME(0), - GUEST_IRQ_HANDLER_NAME(1), +static void (*guest_irq_handlers[2][2])(struct ex_regs *) = { + {GUEST_IRQ_HANDLER_NAME(0, 0), GUEST_IRQ_HANDLER_NAME(0, 1),}, + {GUEST_IRQ_HANDLER_NAME(1, 0), GUEST_IRQ_HANDLER_NAME(1, 1),}, }; static void reset_priorities(struct test_args *args) @@ -181,6 +202,11 @@ static void reset_priorities(struct test_args *args) gic_set_priority(i, IRQ_DEFAULT_PRIO_REG); } +static void guest_set_irq_line(uint32_t intid, uint32_t level) +{ + kvm_inject_call(KVM_SET_IRQ_LINE, intid, 1, level); +} + static void guest_inject(struct test_args *args, uint32_t first_intid, uint32_t num, kvm_inject_cmd cmd) @@ -257,10 +283,12 @@ static void test_inject_preemption(struct test_args *args, for (i = 0; i < num; i++) { uint32_t tmp; intid = i + first_intid; - kvm_inject_call(cmd, intid, 1); + KVM_INJECT(cmd, intid); /* Each successive IRQ will preempt the previous one. */ tmp = wait_for_and_activate_irq(); GUEST_ASSERT_EQ(tmp, intid); + if (args->level_sensitive) + guest_set_irq_line(intid, 0); } /* finish handling the IRQs starting with the highest priority one. */ @@ -321,22 +349,29 @@ static void test_preemption(struct test_args *args, struct kvm_inject_desc *f) static void guest_code(struct test_args args) { uint32_t i, nr_irqs = args.nr_irqs; - struct kvm_inject_desc *f; + bool level_sensitive = args.level_sensitive; + struct kvm_inject_desc *f, *inject_fns; gic_init(GIC_V3, 1, dist, redist); for (i = 0; i < nr_irqs; i++) gic_irq_enable(i); + for (i = MIN_SPI; i < nr_irqs; i++) + gic_irq_set_config(i, !args.level_sensitive); + gic_set_eoi_split(args.eoi_split); reset_priorities(&args); gic_set_priority_mask(CPU_PRIO_MASK); + inject_fns = level_sensitive ? inject_level_fns + : inject_edge_fns; + local_irq_enable(); /* Start the tests. */ - for_each_inject_fn(inject_edge_fns, f) { + for_each_inject_fn(inject_fns, f) { test_injection(&args, f); test_preemption(&args, f); } @@ -351,6 +386,7 @@ static void run_guest_cmd(struct kvm_vm *vm, int gic_fd, kvm_inject_cmd cmd = inject_args->cmd; uint32_t intid = inject_args->first_intid; uint32_t num = inject_args->num; + int level = inject_args->level; uint32_t i; assert(intid < UINT_MAX - num); @@ -362,6 +398,14 @@ static void run_guest_cmd(struct kvm_vm *vm, int gic_fd, for (i = intid; i < intid + num; i++) kvm_arm_irq_line(vm, i, 0); break; + case KVM_SET_IRQ_LINE: + for (i = intid; i < intid + num; i++) + kvm_arm_irq_line(vm, i, level); + break; + case KVM_SET_IRQ_LINE_HIGH: + for (i = intid; i < intid + num; i++) + kvm_arm_irq_line(vm, i, 1); + break; default: break; } @@ -380,11 +424,12 @@ static void kvm_inject_get_call(struct kvm_vm *vm, struct ucall *uc, static void print_args(struct test_args *args) { - printf("nr-irqs=%d eoi-split=%d\n", - args->nr_irqs, args->eoi_split); + printf("nr-irqs=%d level-sensitive=%d eoi-split=%d\n", + args->nr_irqs, args->level_sensitive, + args->eoi_split); } -static void test_vgic(uint32_t nr_irqs, bool eoi_split) +static void test_vgic(uint32_t nr_irqs, bool level_sensitive, bool eoi_split) { struct ucall uc; int gic_fd; @@ -393,6 +438,7 @@ static void test_vgic(uint32_t nr_irqs, bool eoi_split) struct test_args args = { .nr_irqs = nr_irqs, + .level_sensitive = level_sensitive, .eoi_split = eoi_split, }; @@ -411,7 +457,7 @@ static void test_vgic(uint32_t nr_irqs, bool eoi_split) GICD_BASE_GPA, GICR_BASE_GPA); vm_install_exception_handler(vm, VECTOR_IRQ_CURRENT, - guest_irq_handlers[args.eoi_split]); + guest_irq_handlers[args.eoi_split][args.level_sensitive]); while (1) { vcpu_run(vm, VCPU_ID); @@ -442,11 +488,12 @@ static void help(const char *name) { printf( "\n" - "usage: %s [-n num_irqs] [-e eoi_split]\n", name); - printf(" -n: specify the number of IRQs to configure the vgic with. " + "usage: %s [-n num_irqs] [-e eoi_split] [-l level_sensitive]\n", name); + printf(" -n: specify number of IRQs to setup the vgic with. " "It has to be a multiple of 32 and between 64 and 1024.\n"); printf(" -e: if 1 then EOI is split into a write to DIR on top " "of writing EOI.\n"); + printf(" -l: specify whether the IRQs are level-sensitive (1) or not (0)."); puts(""); exit(1); } @@ -455,13 +502,14 @@ int main(int argc, char **argv) { uint32_t nr_irqs = 64; bool default_args = true; + bool level_sensitive = false; int opt; bool eoi_split = false; /* Tell stdout not to buffer its content */ setbuf(stdout, NULL); - while ((opt = getopt(argc, argv, "hn:e:")) != -1) { + while ((opt = getopt(argc, argv, "hn:e:l:")) != -1) { switch (opt) { case 'n': nr_irqs = atoi(optarg); @@ -472,6 +520,10 @@ int main(int argc, char **argv) eoi_split = (bool)atoi(optarg); default_args = false; break; + case 'l': + level_sensitive = (bool)atoi(optarg); + default_args = false; + break; case 'h': default: help(argv[0]); @@ -483,10 +535,12 @@ int main(int argc, char **argv) * combinations. */ if (default_args) { - test_vgic(nr_irqs, false /* eoi_split */); - test_vgic(nr_irqs, true /* eoi_split */); + test_vgic(nr_irqs, false /* level */, false /* eoi_split */); + test_vgic(nr_irqs, false /* level */, true /* eoi_split */); + test_vgic(nr_irqs, true /* level */, false /* eoi_split */); + test_vgic(nr_irqs, true /* level */, true /* eoi_split */); } else { - test_vgic(nr_irqs, eoi_split); + test_vgic(nr_irqs, level_sensitive, eoi_split); } return 0;

[11/17] KVM: selftests: aarch64: level-sensitive interrupts tests in vgic_irq

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