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Tue, 15 Oct 2024 07:17:36 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFrxktjN745zpsGPWC+LCx2mVtIXsTGLI5cISRVUtw6mnU5xAD/iYtdzrJJj1AUQWmCqzK6HA== X-Received: by 2002:a5d:634b:0:b0:37d:47ee:10d9 with SMTP id ffacd0b85a97d-37d86c09fa8mr363546f8f.34.1729001854187; Tue, 15 Oct 2024 07:17:34 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Gao Shiyuan , Wang Liang Subject: [PULL 06/25] target/i386: Add support save/load HWCR MSR Date: Tue, 15 Oct 2024 16:16:52 +0200 Message-ID: <20241015141711.528342-7-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241015141711.528342-1-pbonzini@redhat.com> References: <20241015141711.528342-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.063, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1729002080673116600 Content-Type: text/plain; charset="utf-8" From: Gao Shiyuan KVM commit 191c8137a939 ("x86/kvm: Implement HWCR support") introduced support for emulating HWCR MSR. Add support for QEMU to save/load this MSR for migration purposes. Signed-off-by: Gao Shiyuan Signed-off-by: Wang Liang Link: https://lore.kernel.org/r/20241009095109.66843-1-gaoshiyuan@baidu.com Signed-off-by: Paolo Bonzini --- target/i386/cpu.h | 5 +++++ target/i386/kvm/kvm.c | 12 ++++++++++++ target/i386/machine.c | 20 ++++++++++++++++++++ 3 files changed, 37 insertions(+) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 4c84cd41fd5..74886d1580f 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -533,6 +533,8 @@ typedef enum X86Seg { =20 #define MSR_AMD64_TSC_RATIO_DEFAULT 0x100000000ULL =20 +#define MSR_K7_HWCR 0xc0010015 + #define MSR_VM_HSAVE_PA 0xc0010117 =20 #define MSR_IA32_XFD 0x000001c4 @@ -1858,6 +1860,9 @@ typedef struct CPUArchState { uint64_t msr_lbr_depth; LBREntry lbr_records[ARCH_LBR_NR_ENTRIES]; =20 + /* AMD MSRC001_0015 Hardware Configuration */ + uint64_t msr_hwcr; + /* exception/interrupt handling */ int error_code; int exception_is_int; diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 77e88165707..7c3fcb8698f 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -165,6 +165,7 @@ static bool has_msr_ucode_rev; static bool has_msr_vmx_procbased_ctls2; static bool has_msr_perf_capabs; static bool has_msr_pkrs; +static bool has_msr_hwcr; =20 static uint32_t has_architectural_pmu_version; static uint32_t num_architectural_pmu_gp_counters; @@ -2577,6 +2578,8 @@ static int kvm_get_supported_msrs(KVMState *s) case MSR_IA32_PKRS: has_msr_pkrs =3D true; break; + case MSR_K7_HWCR: + has_msr_hwcr =3D true; } } } @@ -3919,6 +3922,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level) if (has_msr_virt_ssbd) { kvm_msr_entry_add(cpu, MSR_VIRT_SSBD, env->virt_ssbd); } + if (has_msr_hwcr) { + kvm_msr_entry_add(cpu, MSR_K7_HWCR, env->msr_hwcr); + } =20 #ifdef TARGET_X86_64 if (lm_capable_kernel) { @@ -4403,6 +4409,9 @@ static int kvm_get_msrs(X86CPU *cpu) kvm_msr_entry_add(cpu, MSR_IA32_TSC, 0); env->tsc_valid =3D !runstate_is_running(); } + if (has_msr_hwcr) { + kvm_msr_entry_add(cpu, MSR_K7_HWCR, 0); + } =20 #ifdef TARGET_X86_64 if (lm_capable_kernel) { @@ -4922,6 +4931,9 @@ static int kvm_get_msrs(X86CPU *cpu) case MSR_ARCH_LBR_INFO_0 ... MSR_ARCH_LBR_INFO_0 + 31: env->lbr_records[index - MSR_ARCH_LBR_INFO_0].info =3D msrs[i]= .data; break; + case MSR_K7_HWCR: + env->msr_hwcr =3D msrs[i].data; + break; } } =20 diff --git a/target/i386/machine.c b/target/i386/machine.c index 39f8294f279..b4610325aad 100644 --- a/target/i386/machine.c +++ b/target/i386/machine.c @@ -1543,6 +1543,25 @@ static const VMStateDescription vmstate_msr_xfd =3D { } }; =20 +static bool msr_hwcr_needed(void *opaque) +{ + X86CPU *cpu =3D opaque; + CPUX86State *env =3D &cpu->env; + + return env->msr_hwcr !=3D 0; +} + +static const VMStateDescription vmstate_msr_hwcr =3D { + .name =3D "cpu/msr_hwcr", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D msr_hwcr_needed, + .fields =3D (VMStateField[]) { + VMSTATE_UINT64(env.msr_hwcr, X86CPU), + VMSTATE_END_OF_LIST() + } +}; + #ifdef TARGET_X86_64 static bool intel_fred_msrs_needed(void *opaque) { @@ -1773,6 +1792,7 @@ const VMStateDescription vmstate_x86_cpu =3D { &vmstate_msr_intel_sgx, &vmstate_pdptrs, &vmstate_msr_xfd, + &vmstate_msr_hwcr, #ifdef TARGET_X86_64 &vmstate_msr_fred, &vmstate_amx_xtile, --=20 2.46.2