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Wed, 25 Oct 2023 12:30:11 -0700 (PDT) From: =?UTF-8?q?Edwin=20T=C3=B6r=C3=B6k?= To: xen-devel@lists.xenproject.org Cc: =?UTF-8?q?Edwin=20T=C3=B6r=C3=B6k?= , Jun Nakajima , Kevin Tian , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Wei Liu Subject: [RFC PATCH 17/22] x86/PMUv4: IA32_PERF_GLOBAL_{STATUS_SET, INUSE} support Date: Wed, 25 Oct 2023 20:29:47 +0100 Message-Id: <586661cb0604d638972e57de039456c85371ed97.1698261255.git.edwin.torok@cloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @cloud.com) X-ZM-MESSAGEID: 1698262243329100007 From: Edwin T=C3=B6r=C3=B6k Expose thse MSRs to the guest when PMU version is >=3D 4. Signed-off-by: Edwin T=C3=B6r=C3=B6k --- xen/arch/x86/cpu/vpmu_intel.c | 20 +++++++++++++++++++- xen/arch/x86/hvm/vmx/vmx.c | 5 +++++ xen/arch/x86/pv/emul-priv-op.c | 5 +++++ 3 files changed, 29 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/cpu/vpmu_intel.c b/xen/arch/x86/cpu/vpmu_intel.c index 923fe42a0b..5e660af395 100644 --- a/xen/arch/x86/cpu/vpmu_intel.c +++ b/xen/arch/x86/cpu/vpmu_intel.c @@ -171,6 +171,8 @@ static int is_core2_vpmu_msr(u32 msr_index, int *type, = int *index) case MSR_CORE_PERF_GLOBAL_CTRL: case MSR_CORE_PERF_GLOBAL_STATUS: case MSR_CORE_PERF_GLOBAL_OVF_CTRL: + case MSR_CORE_PERF_GLOBAL_STATUS_SET: + case MSR_CORE_PERF_GLOBAL_INUSE: *type =3D MSR_TYPE_GLOBAL; return 1; =20 @@ -545,10 +547,21 @@ static int cf_check core2_vpmu_do_wrmsr(unsigned int = msr, uint64_t msr_content) core2_vpmu_cxt->global_status &=3D ~msr_content; wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content); return 0; + case MSR_CORE_PERF_GLOBAL_STATUS_SET: + if ( (v->domain->arch.cpuid->basic.pmu_version < 4) || + (msr_content & global_ovf_ctrl_mask) ) + return -EINVAL; + core2_vpmu_cxt->global_status |=3D msr_content; + wrmsrl(MSR_CORE_PERF_GLOBAL_STATUS_SET, msr_content); + return 0; case MSR_CORE_PERF_GLOBAL_STATUS: gdprintk(XENLOG_INFO, "Can not write readonly MSR: " "MSR_PERF_GLOBAL_STATUS(0x38E)!\n"); return -EINVAL; + case MSR_CORE_PERF_GLOBAL_INUSE: + gdprintk(XENLOG_INFO, "Can not write readonly MSR: " + "MSR_PERF_GLOBAL_INUSE(0x392)!\n"); + return -EINVAL; case MSR_IA32_PEBS_ENABLE: if ( vpmu_features & (XENPMU_FEATURE_IPC_ONLY | XENPMU_FEATURE_ARCH_ONLY) ) @@ -688,7 +701,8 @@ static int cf_check core2_vpmu_do_rdmsr(unsigned int ms= r, uint64_t *msr_content) core2_vpmu_cxt =3D vpmu->context; switch ( msr ) { - case MSR_CORE_PERF_GLOBAL_OVF_CTRL: + case MSR_CORE_PERF_GLOBAL_OVF_CTRL: /* FALLTHROUGH */ + case MSR_CORE_PERF_GLOBAL_STATUS_SET: *msr_content =3D 0; break; case MSR_CORE_PERF_GLOBAL_STATUS: @@ -700,6 +714,10 @@ static int cf_check core2_vpmu_do_rdmsr(unsigned int m= sr, uint64_t *msr_content) else rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content); break; + case MSR_CORE_PERF_GLOBAL_INUSE: + if ( v->domain->arch.cpuid->basic.pmu_version < 4 ) + return -EINVAL; + /* FALLTHROUGH */ default: rdmsrl(msr, *msr_content); } diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index cd772585fe..af70ed8f30 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -3375,6 +3375,8 @@ static int cf_check vmx_msr_read_intercept( case MSR_CORE_PERF_FIXED_CTR_CTRL...MSR_CORE_PERF_GLOBAL_OVF_CTRL: case MSR_IA32_PEBS_ENABLE: case MSR_IA32_DS_AREA: + case MSR_CORE_PERF_GLOBAL_STATUS_SET: + case MSR_CORE_PERF_GLOBAL_INUSE: if ( vpmu_do_rdmsr(msr, msr_content) ) goto gp_fault; break; @@ -3698,6 +3700,9 @@ static int cf_check vmx_msr_write_intercept( case MSR_IA32_PEBS_ENABLE: case MSR_IA32_DS_AREA: if ( vpmu_do_wrmsr(msr, msr_content) ) + case MSR_CORE_PERF_GLOBAL_STATUS_SET: + case MSR_CORE_PERF_GLOBAL_INUSE: + if ( vpmu_do_wrmsr(msr, msr_content) ) goto gp_fault; break; =20 diff --git a/xen/arch/x86/pv/emul-priv-op.c b/xen/arch/x86/pv/emul-priv-op.c index 09bfde1060..105485bb1e 100644 --- a/xen/arch/x86/pv/emul-priv-op.c +++ b/xen/arch/x86/pv/emul-priv-op.c @@ -968,6 +968,9 @@ static int cf_check read_msr( case MSR_P6_EVNTSEL(0) ... MSR_P6_EVNTSEL_LAST: case MSR_CORE_PERF_FIXED_CTR0 ... MSR_CORE_PERF_FIXED_CTRn: case MSR_CORE_PERF_FIXED_CTR_CTRL ... MSR_CORE_PERF_GLOBAL_OVF_CTRL: + case MSR_IA32_PEBS_ENABLE: + case MSR_CORE_PERF_GLOBAL_STATUS_SET: + case MSR_CORE_PERF_GLOBAL_INUSE: if ( boot_cpu_data.x86_vendor =3D=3D X86_VENDOR_INTEL ) { vpmu_msr =3D true; @@ -1148,6 +1151,8 @@ static int cf_check write_msr( case MSR_P6_EVNTSEL(0) ... MSR_P6_EVNTSEL_LAST: case MSR_CORE_PERF_FIXED_CTR0 ... MSR_CORE_PERF_FIXED_CTRn: case MSR_CORE_PERF_FIXED_CTR_CTRL ... MSR_CORE_PERF_GLOBAL_OVF_CTRL: + case MSR_CORE_PERF_GLOBAL_STATUS_SET: + case MSR_CORE_PERF_GLOBAL_INUSE: if ( boot_cpu_data.x86_vendor =3D=3D X86_VENDOR_INTEL ) { vpmu_msr =3D true; --=20 2.41.0