From 28039449b83e21f741937e84d4fd6485ad4fb9f8 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Tue, 15 Feb 2022 17:06:02 -0800 Subject: [PATCH] KVM: selftests: Convert debug_regs away from VCPU_ID Convert debug_regs to use vm_create_with_one_vcpu() and pass around a 'struct kvm_vcpu' object instead of using a global VCPU_ID. Opportunstically drop the CLEAR_DEBUG/APPLY_DEBUG macros as they only obfuscate the code, e.g. operating on local variables not "passed" to the macro is all kinds of confusing. Signed-off-by: Sean Christopherson Signed-off-by: Paolo Bonzini --- tools/testing/selftests/kvm/x86_64/debug_regs.c | 53 ++++++++++++------------- 1 file changed, 25 insertions(+), 28 deletions(-) diff --git a/tools/testing/selftests/kvm/x86_64/debug_regs.c b/tools/testing/selftests/kvm/x86_64/debug_regs.c index f726645..182d71c 100644 --- a/tools/testing/selftests/kvm/x86_64/debug_regs.c +++ b/tools/testing/selftests/kvm/x86_64/debug_regs.c @@ -10,8 +10,6 @@ #include "processor.h" #include "apic.h" -#define VCPU_ID 0 - #define DR6_BD (1 << 13) #define DR7_GD (1 << 13) @@ -66,13 +64,11 @@ static void guest_code(void) GUEST_DONE(); } -#define CLEAR_DEBUG() memset(&debug, 0, sizeof(debug)) -#define APPLY_DEBUG() vcpu_guest_debug_set(vm, VCPU_ID, &debug) #define CAST_TO_RIP(v) ((unsigned long long)&(v)) #define SET_RIP(v) do { \ - vcpu_regs_get(vm, VCPU_ID, ®s); \ + vcpu_regs_get(vm, vcpu->id, ®s); \ regs.rip = (v); \ - vcpu_regs_set(vm, VCPU_ID, ®s); \ + vcpu_regs_set(vm, vcpu->id, ®s); \ } while (0) #define MOVE_RIP(v) SET_RIP(regs.rip + (v)); @@ -80,6 +76,7 @@ int main(void) { struct kvm_guest_debug debug; unsigned long long target_dr6, target_rip; + struct kvm_vcpu *vcpu; struct kvm_regs regs; struct kvm_run *run; struct kvm_vm *vm; @@ -101,14 +98,14 @@ int main(void) return 0; } - vm = vm_create_default(VCPU_ID, 0, guest_code); - run = vcpu_state(vm, VCPU_ID); + vm = vm_create_with_one_vcpu(&vcpu, guest_code); + run = vcpu->run; /* Test software BPs - int3 */ - CLEAR_DEBUG(); + memset(&debug, 0, sizeof(debug)); debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; - APPLY_DEBUG(); - vcpu_run(vm, VCPU_ID); + vcpu_guest_debug_set(vm, vcpu->id, &debug); + vcpu_run(vm, vcpu->id); TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG && run->debug.arch.exception == BP_VECTOR && run->debug.arch.pc == CAST_TO_RIP(sw_bp), @@ -119,12 +116,12 @@ int main(void) /* Test instruction HW BP over DR[0-3] */ for (i = 0; i < 4; i++) { - CLEAR_DEBUG(); + memset(&debug, 0, sizeof(debug)); debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; debug.arch.debugreg[i] = CAST_TO_RIP(hw_bp); debug.arch.debugreg[7] = 0x400 | (1UL << (2*i+1)); - APPLY_DEBUG(); - vcpu_run(vm, VCPU_ID); + vcpu_guest_debug_set(vm, vcpu->id, &debug); + vcpu_run(vm, vcpu->id); target_dr6 = 0xffff0ff0 | (1UL << i); TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG && run->debug.arch.exception == DB_VECTOR && @@ -141,13 +138,13 @@ int main(void) /* Test data access HW BP over DR[0-3] */ for (i = 0; i < 4; i++) { - CLEAR_DEBUG(); + memset(&debug, 0, sizeof(debug)); debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; debug.arch.debugreg[i] = CAST_TO_RIP(guest_value); debug.arch.debugreg[7] = 0x00000400 | (1UL << (2*i+1)) | (0x000d0000UL << (4*i)); - APPLY_DEBUG(); - vcpu_run(vm, VCPU_ID); + vcpu_guest_debug_set(vm, vcpu->id, &debug); + vcpu_run(vm, vcpu->id); target_dr6 = 0xffff0ff0 | (1UL << i); TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG && run->debug.arch.exception == DB_VECTOR && @@ -167,15 +164,15 @@ int main(void) /* Test single step */ target_rip = CAST_TO_RIP(ss_start); target_dr6 = 0xffff4ff0ULL; - vcpu_regs_get(vm, VCPU_ID, ®s); + vcpu_regs_get(vm, vcpu->id, ®s); for (i = 0; i < (sizeof(ss_size) / sizeof(ss_size[0])); i++) { target_rip += ss_size[i]; - CLEAR_DEBUG(); + memset(&debug, 0, sizeof(debug)); debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_BLOCKIRQ; debug.arch.debugreg[7] = 0x00000400; - APPLY_DEBUG(); - vcpu_run(vm, VCPU_ID); + vcpu_guest_debug_set(vm, vcpu->id, &debug); + vcpu_run(vm, vcpu->id); TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG && run->debug.arch.exception == DB_VECTOR && run->debug.arch.pc == target_rip && @@ -188,11 +185,11 @@ int main(void) } /* Finally test global disable */ - CLEAR_DEBUG(); + memset(&debug, 0, sizeof(debug)); debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; debug.arch.debugreg[7] = 0x400 | DR7_GD; - APPLY_DEBUG(); - vcpu_run(vm, VCPU_ID); + vcpu_guest_debug_set(vm, vcpu->id, &debug); + vcpu_run(vm, vcpu->id); target_dr6 = 0xffff0ff0 | DR6_BD; TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG && run->debug.arch.exception == DB_VECTOR && @@ -205,12 +202,12 @@ int main(void) target_dr6); /* Disable all debug controls, run to the end */ - CLEAR_DEBUG(); - APPLY_DEBUG(); + memset(&debug, 0, sizeof(debug)); + vcpu_guest_debug_set(vm, vcpu->id, &debug); - vcpu_run(vm, VCPU_ID); + vcpu_run(vm, vcpu->id); TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "KVM_EXIT_IO"); - cmd = get_ucall(vm, VCPU_ID, &uc); + cmd = get_ucall(vm, vcpu->id, &uc); TEST_ASSERT(cmd == UCALL_DONE, "UCALL_DONE"); kvm_vm_free(vm); -- 2.7.4