[PATCH OLK-6.6 2/6] kvm: debugfs: export remaining aarch64 kvm exit reasons to debugfs

From: chenjiajun chenjiajun8@huawei.com

virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I919BF CVE: NA

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This patch export remaining aarch64 exit items to vcpu_stat via debugfs. The items include: fp_asimd_exit_stat, irq_exit_stat, sys64_exit_stat, mabt_exit_stat, fail_entry_exit_stat, internal_error_exit_stat, unknown_ec_exit_stat, cp15_32_exit_stat, cp15_64_exit_stat, cp14_mr_exit_stat, cp14_ls_exit_stat, cp14_64_exit_stat, smc_exit_stat, sve_exit_stat, debug_exit_stat

Signed-off-by: chenjiajun chenjiajun8@huawei.com Signed-off-by: liangtian liangtian13@huawei.com --- arch/arm64/include/asm/kvm_host.h | 15 +++++++++++++++ arch/arm64/kvm/guest.c | 15 +++++++++++++++ arch/arm64/kvm/handle_exit.c | 8 ++++++++ arch/arm64/kvm/hyp/include/hyp/switch.h | 2 ++ arch/arm64/kvm/mmu.c | 1 + arch/arm64/kvm/sys_regs.c | 9 +++++++++ 6 files changed, 50 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index f50d645a8b9c..606ab46be948 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -906,6 +906,21 @@ struct kvm_vcpu_stat { u64 mmio_exit_kernel; u64 signal_exits; u64 exits; + u64 fp_asimd_exit_stat; + u64 irq_exit_stat; + u64 sys64_exit_stat; + u64 mabt_exit_stat; + u64 fail_entry_exit_stat; + u64 internal_error_exit_stat; + u64 unknown_ec_exit_stat; + u64 cp15_32_exit_stat; + u64 cp15_64_exit_stat; + u64 cp14_mr_exit_stat; + u64 cp14_ls_exit_stat; + u64 cp14_64_exit_stat; + u64 smc_exit_stat; + u64 sve_exit_stat; + u64 debug_exit_stat; };

unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 944cb5e1b541..7b2048f88de1 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -40,6 +40,21 @@ struct dfx_kvm_stats_debugfs_item dfx_debugfs_entries[] = { DFX_STAT("mmio_exit_kernel", mmio_exit_kernel), DFX_STAT("signal_exits", signal_exits), DFX_STAT("exits", exits), + DFX_STAT("fp_asimd_exit_stat", fp_asimd_exit_stat), + DFX_STAT("irq_exit_stat", irq_exit_stat), + DFX_STAT("sys64_exit_stat", sys64_exit_stat), + DFX_STAT("mabt_exit_stat", mabt_exit_stat), + DFX_STAT("fail_entry_exit_stat", fail_entry_exit_stat), + DFX_STAT("internal_error_exit_stat", internal_error_exit_stat), + DFX_STAT("unknown_ec_exit_stat", unknown_ec_exit_stat), + DFX_STAT("cp15_32_exit_stat", cp15_32_exit_stat), + DFX_STAT("cp15_64_exit_stat", cp15_64_exit_stat), + DFX_STAT("cp14_mr_exit_stat", cp14_mr_exit_stat), + DFX_STAT("cp14_ls_exit_stat", cp14_ls_exit_stat), + DFX_STAT("cp14_64_exit_stat", cp14_64_exit_stat), + DFX_STAT("smc_exit_stat", smc_exit_stat), + DFX_STAT("sve_exit_stat", sve_exit_stat), + DFX_STAT("debug_exit_stat", debug_exit_stat), { NULL } }; #endif diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 617ae6dea5d5..90959b8b6228 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -73,6 +73,7 @@ static int handle_smc(struct kvm_vcpu *vcpu) */ if (kvm_vcpu_hvc_get_imm(vcpu)) { vcpu_set_reg(vcpu, 0, ~0UL); + vcpu->stat.smc_exit_stat++; return 1; }

@@ -172,6 +173,7 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu) run->debug.arch.hsr = lower_32_bits(esr); run->debug.arch.hsr_high = upper_32_bits(esr); run->flags = KVM_DEBUG_ARCH_HSR_HIGH_VALID; + vcpu->stat.debug_exit_stat++;

switch (ESR_ELx_EC(esr)) { case ESR_ELx_EC_WATCHPT_LOW: @@ -193,6 +195,7 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu) esr, esr_get_class_string(esr));

kvm_inject_undefined(vcpu); + vcpu->stat.unknown_ec_exit_stat++; return 1; }

@@ -203,6 +206,7 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu) static int handle_sve(struct kvm_vcpu *vcpu) { kvm_inject_undefined(vcpu); + vcpu->stat.sve_exit_stat++; return 1; }

@@ -335,6 +339,7 @@ int handle_exit(struct kvm_vcpu *vcpu, int exception_index)

switch (exception_index) { case ARM_EXCEPTION_IRQ: + vcpu->stat.irq_exit_stat++; return 1; case ARM_EXCEPTION_EL1_SERROR: return 1; @@ -346,6 +351,7 @@ int handle_exit(struct kvm_vcpu *vcpu, int exception_index) * is pre-emptied by kvm_reboot()'s shutdown call. */ run->exit_reason = KVM_EXIT_FAIL_ENTRY; + vcpu->stat.fail_entry_exit_stat++; return 0; case ARM_EXCEPTION_IL: /* @@ -353,11 +359,13 @@ int handle_exit(struct kvm_vcpu *vcpu, int exception_index) * have been corrupted somehow. Give up. */ run->exit_reason = KVM_EXIT_FAIL_ENTRY; + vcpu->stat.fail_entry_exit_stat++; return -EINVAL; default: kvm_pr_unimpl("Unsupported exception type: %d", exception_index); run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + vcpu->stat.internal_error_exit_stat++; return 0; } } diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index 657320f453e6..97a54576f2d1 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -326,8 +326,10 @@ static bool kvm_hyp_handle_fpsimd(struct kvm_vcpu *vcpu, u64 *exit_code) /* Only handle traps the vCPU can support here: */ switch (esr_ec) { case ESR_ELx_EC_FP_ASIMD: + vcpu->stat.fp_asimd_exit_stat++; break; case ESR_ELx_EC_SVE: + vcpu->stat.sve_exit_stat++; if (!sve_guest) return false; break; diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 482280fe22d7..121a3d90240d 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1416,6 +1416,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa, write_fault = kvm_is_write_fault(vcpu); exec_fault = kvm_vcpu_trap_is_exec_fault(vcpu); VM_BUG_ON(write_fault && exec_fault); + vcpu->stat.mabt_exit_stat++;

if (fault_status == ESR_ELx_FSC_PERM && !write_fault && !exec_fault) { kvm_err("Unexpected L2 read permission error\n"); diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 9424fa7351bf..a83a43eb116f 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2840,6 +2840,8 @@ static bool check_sysreg_table(const struct sys_reg_desc *table, unsigned int n, int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu) { kvm_inject_undefined(vcpu); + vcpu->stat.cp14_ls_exit_stat++; + return 1; }

@@ -3116,12 +3118,15 @@ static int kvm_handle_cp_32(struct kvm_vcpu *vcpu,

int kvm_handle_cp15_64(struct kvm_vcpu *vcpu) { + vcpu->stat.cp15_64_exit_stat++; + return kvm_handle_cp_64(vcpu, cp15_64_regs, ARRAY_SIZE(cp15_64_regs)); }

int kvm_handle_cp15_32(struct kvm_vcpu *vcpu) { struct sys_reg_params params; + vcpu->stat.cp15_32_exit_stat++;

params = esr_cp1x_32_to_params(kvm_vcpu_get_esr(vcpu));

@@ -3139,12 +3144,15 @@ int kvm_handle_cp15_32(struct kvm_vcpu *vcpu)

int kvm_handle_cp14_64(struct kvm_vcpu *vcpu) { + vcpu->stat.cp14_64_exit_stat++; + return kvm_handle_cp_64(vcpu, cp14_64_regs, ARRAY_SIZE(cp14_64_regs)); }

int kvm_handle_cp14_32(struct kvm_vcpu *vcpu) { struct sys_reg_params params; + vcpu->stat.cp14_mr_exit_stat++;

params = esr_cp1x_32_to_params(kvm_vcpu_get_esr(vcpu));

@@ -3244,6 +3252,7 @@ int kvm_handle_sys_reg(struct kvm_vcpu *vcpu) int Rt = kvm_vcpu_sys_get_rt(vcpu);

trace_kvm_handle_sys_reg(esr); + vcpu->stat.sys64_exit_stat++;

if (__check_nv_sr_forward(vcpu)) return 1;