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x-conformance=sidf_compatible IronPort-SDR: lW7yr/9SzEmoWtwj5atuK2cuTzZ17Idmh/MjzYbuvSppSvpgN6K3dxCnbysrEbNEwTQMmLoQjQ 8DdcGB7LB0HdUkOxW/ELRfTfcgSrl5yCosWK2g8qgsIi693yzNr0DCODouZ1RXsZtHRvG7YNQp eijopjEA41iWYskWyc5QkEDyrqVHB04IJPeANyyOI6wr4Ft9ACItCTYTGsAcJv8v5nqURWOEqa 3w3gxUdi0HR4fFeZxLoxMw2r83hPFJWQ1KDMWxomsYXzyWPbpsy8kN+Jc+qIugGc2wv+HJ9tRR LC8= X-SBRS: 2.7 X-MesageID: 9024069 X-Ironport-Server: esa6.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.69,222,1571716800"; d="scan'208";a="9024069" From: Roger Pau Monne To: Date: Wed, 20 Nov 2019 18:39:20 +0100 Message-ID: <20191120173920.8705-1-roger.pau@citrix.com> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Subject: [Xen-devel] [PATCH for-4.13] x86/vlapic: allow setting APIC_SPIV_FOCUS_DISABLED in x2APIC mode X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Andrew Cooper , Wei Liu , Jan Beulich , Roger Pau Monne Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Current code unconditionally prevents setting APIC_SPIV_FOCUS_DISABLED regardless of the processor model, which is not correct according to the specification. Fix it by allowing setting APIC_SPIV_FOCUS_DISABLED based on the domain cpuid policy. Signed-off-by: Roger Pau Monn=C3=A9 --- Cc: Juergen Gross --- xen/arch/x86/hvm/vlapic.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/xen/arch/x86/hvm/vlapic.c b/xen/arch/x86/hvm/vlapic.c index 9466258d6f..b318b4ed5c 100644 --- a/xen/arch/x86/hvm/vlapic.c +++ b/xen/arch/x86/hvm/vlapic.c @@ -977,6 +977,7 @@ int guest_wrmsr_x2apic(struct vcpu *v, uint32_t msr, ui= nt64_t msr_content) { struct vlapic *vlapic =3D vcpu_vlapic(v); uint32_t offset =3D (msr - MSR_X2APIC_FIRST) << 4; + const struct cpuid_policy *cpuid =3D v->domain->arch.cpuid; =20 /* The timer handling at least is unsafe outside of current context. */ ASSERT(v =3D=3D current); @@ -993,6 +994,14 @@ int guest_wrmsr_x2apic(struct vcpu *v, uint32_t msr, u= int64_t msr_content) =20 case APIC_SPIV: if ( msr_content & ~(APIC_VECTOR_MASK | APIC_SPIV_APIC_ENABLED | + /* + * APIC_SPIV_FOCUS_DISABLED is not supported = on + * Intel Pentium 4 and Xeon processors. + */ + ((cpuid->x86_vendor !=3D X86_VENDOR_INTEL || + get_cpu_family(cpuid->basic.raw_fms, NULL, + NULL) !=3D 15) ? + APIC_SPIV_FOCUS_DISABLED : 0) | (VLAPIC_VERSION & APIC_LVR_DIRECTED_EOI ? APIC_SPIV_DIRECTED_EOI : 0)) ) return X86EMUL_EXCEPTION; --=20 2.24.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel