From patchwork Fri Jun 4 17:26:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Mattson X-Patchwork-Id: 12300367 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B90CC4743C for ; Fri, 4 Jun 2021 17:27:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 74C1D61405 for ; Fri, 4 Jun 2021 17:27:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231281AbhFDR3a (ORCPT ); Fri, 4 Jun 2021 13:29:30 -0400 Received: from mail-yb1-f201.google.com ([209.85.219.201]:56078 "EHLO mail-yb1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229892AbhFDR33 (ORCPT ); Fri, 4 Jun 2021 13:29:29 -0400 Received: by mail-yb1-f201.google.com with SMTP id m194-20020a2526cb0000b02905375d41acd7so12657432ybm.22 for ; Fri, 04 Jun 2021 10:27:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=fI8pxJuBvcTSJcYb+gcMX6vyXH4iVi6Ryn52o35lufE=; b=OIMxMmMcMDTEikfdbYs4QFgl7LSKbguFsO6botGFgO5a7m4A4LlhG3Nm5M7UZmIQk2 0PNq0dy2dMje1KR0G1ZnWapzieOzhBAlZ6G4ZjIZI0Xjg4sUy7pZ25Uys58wzm4M+Rhx T4DxxjSM7OAm/Ln5fwbscWfIt2T+QqpoZt/USk2rBK/MmyYSIBNldMxSgRdnFelXTY9j QlSB7YZJpeIMsLbSSwsu4kUhUauRtQMOVM8iXOs5Kd54nyFloxxNRuMSol5doyR/txrA Y8sQ1xnC3pbgunK7/1sAfIP5tcsdaCVc80s7WcTIu9z9ncNk+lYNFVGSzPhaq74wmD6i at8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=fI8pxJuBvcTSJcYb+gcMX6vyXH4iVi6Ryn52o35lufE=; b=KgEE8KYNJS9PT8kphODMX6v3/a13slyD1nqqqR+7YgljM8tAiZOXJD/TIBh1a9mFUR 5XO7nyTftqxsL30Gdgoam84RbRvZJXj2rQjksCVmBhlpPQDMrkG1LkCuixS/8L1WR3qF 6lBGHl30gnMfGcZHyUXOkPMU6iEGXvMMyyJRx52Dc00pKu+wo5J9baSNCDfkuetd/mrG WkxcUazA+fPTjFhwpErHyzlBUNuWpZerBhdFxNlav3DDt0pleU5Ypcpoa/8kXIv0ErhV skSNimvcQuaPUrIJp23J4fkNz15u0aC6DeBMgre9IPltop1Sb/OxPDgj4t5rwWHMjO7/ QkPg== X-Gm-Message-State: AOAM530+BIMxud5YWt46AjGAlWobwGgwkAwNjA0Mxsm27piGwprjsYQ4 Drcp9w6B8mW10P3vv9UL/TT4ZkOA1QzFGPap8ty1Qe6AhMXiSI3H6csTtC0Qx5iVwEPvpJnZ0Ls 5NBfNVP+sJksg0SpY0sTO3wU5v6dFiIpKa0/y2xnJa5/LES7Z9YVwwL2iWjurTxk= X-Google-Smtp-Source: ABdhPJxJNCDeRnKQMFXsvk9dp76wEZ4IjRH915e701jQYOq0+1GHkgVn+vrJZP0X/DcovQh4Mu65xz135fPPWw== X-Received: from tortoise.c.googlers.com ([fda3:e722:ac3:10:7f:e700:c0a8:1a0d]) (user=jmattson job=sendgmr) by 2002:a25:2681:: with SMTP id m123mr5185657ybm.121.1622827602319; Fri, 04 Jun 2021 10:26:42 -0700 (PDT) Date: Fri, 4 Jun 2021 10:26:08 -0700 In-Reply-To: <20210604172611.281819-1-jmattson@google.com> Message-Id: <20210604172611.281819-10-jmattson@google.com> Mime-Version: 1.0 References: <20210604172611.281819-1-jmattson@google.com> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog Subject: [PATCH v2 09/12] KVM: selftests: Hoist APIC functions out of individual tests From: Jim Mattson To: kvm@vger.kernel.org, pbonzini@redhat.com Cc: Jim Mattson , Oliver Upton Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Move the APIC functions into the library to encourage code reuse and to avoid unintended deviations. Signed-off-by: Jim Mattson Reviewed-by: Oliver Upton --- tools/testing/selftests/kvm/Makefile | 2 +- .../selftests/kvm/include/x86_64/apic.h | 23 ++++++++ .../selftests/kvm/include/x86_64/processor.h | 2 + tools/testing/selftests/kvm/lib/x86_64/apic.c | 46 +++++++++++++++ .../testing/selftests/kvm/x86_64/evmcs_test.c | 11 +--- .../selftests/kvm/x86_64/set_boot_cpu_id.c | 6 +- .../selftests/kvm/x86_64/xapic_ipi_test.c | 59 +++---------------- 7 files changed, 83 insertions(+), 66 deletions(-) create mode 100644 tools/testing/selftests/kvm/lib/x86_64/apic.c diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index daaee1888b12..5e9051dd4336 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -34,7 +34,7 @@ ifeq ($(ARCH),s390) endif LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c -LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S +LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c diff --git a/tools/testing/selftests/kvm/include/x86_64/apic.h b/tools/testing/selftests/kvm/include/x86_64/apic.h index 0d0e35c8866b..e5a9fe040a6c 100644 --- a/tools/testing/selftests/kvm/include/x86_64/apic.h +++ b/tools/testing/selftests/kvm/include/x86_64/apic.h @@ -8,6 +8,10 @@ #ifndef SELFTEST_KVM_APIC_H #define SELFTEST_KVM_APIC_H +#include + +#include "processor.h" + #define APIC_DEFAULT_GPA 0xfee00000ULL /* APIC base address MSR and fields */ @@ -55,4 +59,23 @@ #define APIC_ICR2 0x310 #define SET_APIC_DEST_FIELD(x) ((x) << 24) +void apic_disable(void); +void xapic_enable(void); +void x2apic_enable(void); + +static inline uint32_t get_bsp_flag(void) +{ + return rdmsr(MSR_IA32_APICBASE) & MSR_IA32_APICBASE_BSP; +} + +static inline uint32_t xapic_read_reg(unsigned int reg) +{ + return ((volatile uint32_t *)APIC_DEFAULT_GPA)[reg >> 2]; +} + +static inline void xapic_write_reg(unsigned int reg, uint32_t val) +{ + ((volatile uint32_t *)APIC_DEFAULT_GPA)[reg >> 2] = val; +} + #endif /* SELFTEST_KVM_APIC_H */ diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index a4729d9032ce..9a5b47d2d5d6 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -13,6 +13,8 @@ #include +#include "../kvm_util.h" + #define X86_EFLAGS_FIXED (1u << 1) #define X86_CR4_VME (1ul << 0) diff --git a/tools/testing/selftests/kvm/lib/x86_64/apic.c b/tools/testing/selftests/kvm/lib/x86_64/apic.c new file mode 100644 index 000000000000..31f318ac67ba --- /dev/null +++ b/tools/testing/selftests/kvm/lib/x86_64/apic.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * tools/testing/selftests/kvm/lib/x86_64/processor.c + * + * Copyright (C) 2021, Google LLC. + */ + +#include "apic.h" + +void apic_disable(void) +{ + wrmsr(MSR_IA32_APICBASE, + rdmsr(MSR_IA32_APICBASE) & + ~(MSR_IA32_APICBASE_ENABLE | MSR_IA32_APICBASE_EXTD)); +} + +void xapic_enable(void) +{ + uint64_t val = rdmsr(MSR_IA32_APICBASE); + + /* Per SDM: to enable xAPIC when in x2APIC must first disable APIC */ + if (val & MSR_IA32_APICBASE_EXTD) { + apic_disable(); + wrmsr(MSR_IA32_APICBASE, + rdmsr(MSR_IA32_APICBASE) | MSR_IA32_APICBASE_ENABLE); + } else if (!(val & MSR_IA32_APICBASE_ENABLE)) { + wrmsr(MSR_IA32_APICBASE, val | MSR_IA32_APICBASE_ENABLE); + } + + /* + * Per SDM: reset value of spurious interrupt vector register has the + * APIC software enabled bit=0. It must be enabled in addition to the + * enable bit in the MSR. + */ + val = xapic_read_reg(APIC_SPIV) | APIC_SPIV_APIC_ENABLED; + xapic_write_reg(APIC_SPIV, val); +} + +void x2apic_enable(void) +{ + uint32_t spiv_reg = APIC_BASE_MSR + (APIC_SPIV >> 4); + + wrmsr(MSR_IA32_APICBASE, rdmsr(MSR_IA32_APICBASE) | + MSR_IA32_APICBASE_ENABLE | MSR_IA32_APICBASE_EXTD); + wrmsr(spiv_reg, rdmsr(spiv_reg) | APIC_SPIV_APIC_ENABLED); +} diff --git a/tools/testing/selftests/kvm/x86_64/evmcs_test.c b/tools/testing/selftests/kvm/x86_64/evmcs_test.c index 63096cea26c6..d058d9e428c6 100644 --- a/tools/testing/selftests/kvm/x86_64/evmcs_test.c +++ b/tools/testing/selftests/kvm/x86_64/evmcs_test.c @@ -22,15 +22,6 @@ static int ud_count; -void enable_x2apic(void) -{ - uint32_t spiv_reg = APIC_BASE_MSR + (APIC_SPIV >> 4); - - wrmsr(MSR_IA32_APICBASE, rdmsr(MSR_IA32_APICBASE) | - MSR_IA32_APICBASE_ENABLE | MSR_IA32_APICBASE_EXTD); - wrmsr(spiv_reg, rdmsr(spiv_reg) | APIC_SPIV_APIC_ENABLED); -} - static void guest_ud_handler(struct ex_regs *regs) { ud_count++; @@ -59,7 +50,7 @@ void guest_code(struct vmx_pages *vmx_pages) #define L2_GUEST_STACK_SIZE 64 unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; - enable_x2apic(); + x2apic_enable(); GUEST_SYNC(1); GUEST_SYNC(2); diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c index 12c558fc8074..5f8dd74d415f 100644 --- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c +++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c @@ -14,16 +14,12 @@ #include "test_util.h" #include "kvm_util.h" #include "processor.h" +#include "apic.h" #define N_VCPU 2 #define VCPU_ID0 0 #define VCPU_ID1 1 -static uint32_t get_bsp_flag(void) -{ - return rdmsr(MSR_IA32_APICBASE) & MSR_IA32_APICBASE_BSP; -} - static void guest_bsp_vcpu(void *arg) { GUEST_SYNC(1); diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c index 2f964cdc273c..21b22718a9db 100644 --- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c +++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c @@ -42,8 +42,6 @@ #define HALTER_VCPU_ID 0 #define SENDER_VCPU_ID 1 -volatile uint32_t *apic_base = (volatile uint32_t *)APIC_DEFAULT_GPA; - /* * Vector for IPI from sender vCPU to halting vCPU. * Value is arbitrary and was chosen for the alternating bit pattern. Any @@ -86,45 +84,6 @@ struct thread_params { uint64_t *pipis_rcvd; /* host address of ipis_rcvd global */ }; -uint32_t read_apic_reg(uint reg) -{ - return apic_base[reg >> 2]; -} - -void write_apic_reg(uint reg, uint32_t val) -{ - apic_base[reg >> 2] = val; -} - -void disable_apic(void) -{ - wrmsr(MSR_IA32_APICBASE, - rdmsr(MSR_IA32_APICBASE) & - ~(MSR_IA32_APICBASE_ENABLE | MSR_IA32_APICBASE_EXTD)); -} - -void enable_xapic(void) -{ - uint64_t val = rdmsr(MSR_IA32_APICBASE); - - /* Per SDM: to enable xAPIC when in x2APIC must first disable APIC */ - if (val & MSR_IA32_APICBASE_EXTD) { - disable_apic(); - wrmsr(MSR_IA32_APICBASE, - rdmsr(MSR_IA32_APICBASE) | MSR_IA32_APICBASE_ENABLE); - } else if (!(val & MSR_IA32_APICBASE_ENABLE)) { - wrmsr(MSR_IA32_APICBASE, val | MSR_IA32_APICBASE_ENABLE); - } - - /* - * Per SDM: reset value of spurious interrupt vector register has the - * APIC software enabled bit=0. It must be enabled in addition to the - * enable bit in the MSR. - */ - val = read_apic_reg(APIC_SPIV) | APIC_SPIV_APIC_ENABLED; - write_apic_reg(APIC_SPIV, val); -} - void verify_apic_base_addr(void) { uint64_t msr = rdmsr(MSR_IA32_APICBASE); @@ -136,10 +95,10 @@ void verify_apic_base_addr(void) static void halter_guest_code(struct test_data_page *data) { verify_apic_base_addr(); - enable_xapic(); + xapic_enable(); - data->halter_apic_id = GET_APIC_ID_FIELD(read_apic_reg(APIC_ID)); - data->halter_lvr = read_apic_reg(APIC_LVR); + data->halter_apic_id = GET_APIC_ID_FIELD(xapic_read_reg(APIC_ID)); + data->halter_lvr = xapic_read_reg(APIC_LVR); /* * Loop forever HLTing and recording halts & wakes. Disable interrupts @@ -150,8 +109,8 @@ static void halter_guest_code(struct test_data_page *data) * TPR and PPR for diagnostic purposes in case the test fails. */ for (;;) { - data->halter_tpr = read_apic_reg(APIC_TASKPRI); - data->halter_ppr = read_apic_reg(APIC_PROCPRI); + data->halter_tpr = xapic_read_reg(APIC_TASKPRI); + data->halter_ppr = xapic_read_reg(APIC_PROCPRI); data->hlt_count++; asm volatile("sti; hlt; cli"); data->wake_count++; @@ -166,7 +125,7 @@ static void halter_guest_code(struct test_data_page *data) static void guest_ipi_handler(struct ex_regs *regs) { ipis_rcvd++; - write_apic_reg(APIC_EOI, 77); + xapic_write_reg(APIC_EOI, 77); } static void sender_guest_code(struct test_data_page *data) @@ -179,7 +138,7 @@ static void sender_guest_code(struct test_data_page *data) uint64_t tsc_start; verify_apic_base_addr(); - enable_xapic(); + xapic_enable(); /* * Init interrupt command register for sending IPIs @@ -206,8 +165,8 @@ static void sender_guest_code(struct test_data_page *data) * First IPI can be sent unconditionally because halter vCPU * starts earlier. */ - write_apic_reg(APIC_ICR2, icr2_val); - write_apic_reg(APIC_ICR, icr_val); + xapic_write_reg(APIC_ICR2, icr2_val); + xapic_write_reg(APIC_ICR, icr_val); data->ipis_sent++; /*