From mboxrd@z Thu Jan 1 00:00:00 1970 From: f4da1594@opayq.com Subject: Delivery Status Notification (Delay) Date: Thu, 08 Jun 2017 16:35:50 -0700 (PDT) Message-ID: <1535118314.7379.1496964952334.JavaMail.root@smtp4.opayq.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0798531755081607840==" Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org --===============0798531755081607840== Content-Type: multipart/report; boundary="94eb2c0c832620ca2f05517b50cb"; report-type=delivery-status --94eb2c0c832620ca2f05517b50cb Content-Type: multipart/related; boundary="94eb2c0c832620cb0005517b50cc" --94eb2c0c832620cb0005517b50cc Content-Type: multipart/alternative; boundary="94eb2c0c832620cb2205517b50cd" --94eb2c0c832620cb2205517b50cd Content-Type: text/plain; charset="UTF-8" ** Delivery incomplete ** There was a temporary problem delivering your message to curtiskwong9@gmail.com. Gmail will retry for 47 more hours. You'll be notified if the delivery fails permanently. --94eb2c0c832620cb2205517b50cd Content-Type: text/html; charset="UTF-8"

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(https= ://dnt.abine.com/#help/faq/faq-whataremaskedemails). IF THIS IS SPAM, CLICK HERE TO BLOCK: https://dnt.abine.com/#/block_email/f4da1594@opayq.com/FWD-737QHYSMHVAYQAUC= AOIQBDAAGAQLMA2YAMHECCJDLIBAYAWYAKIAZAQHSMCCWMBLIA4UANQUEIGCIMBKMAZUZ4AAEAA= CA=3D=3D=3D@opayq.com Want to shop safely and privately online? Go Premium: https://dnt.abine.com= /?pk_campaign=3DmaskHeader#premium -------------------------by Abine------------------------- commit 4f35cb80e8813053d1cec9dc1654ceb6dd7575a0 Author: Chao Gao AuthorDate: Tue Jun 6 14:34:30 2017 +0200 Commit: Jan Beulich CommitDate: Tue Jun 6 14:34:30 2017 +0200 x86/vlapic: fix two flaws in emulating MSR_IA32_APICBASE =20 According to SDM Chapter ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER (AP= IC) -> Extended XAPIC (x2APIC) -> x2APIC State Transitions, The existing co= de to handle guest's writing MSR_IA32_APICBASE has two flaws: 1. Transition from x2APIC Mode to Disabled Mode is allowed but wrongly disabled currently. Fix it by removing the related check. 2. Transition from x2APIC Mode to xAPIC Mode is illegal but wrongly all= owed currently. Considering changing ENABLE bit of the MSR has been handled, it can be fixed by only allowing transition from xAPIC Mode to x2APIC M= ode (the other two transitions: from x2APIC mode to xAPIC Mode, from disabl= ed mode to invalid state (EN=3D0, EXTD=3D1) are disabled). =20 Signed-off-by: Chao Gao Reviewed-by: Jan Beulich --- xen/arch/x86/hvm/vlapic.c | 6 ++---- xen/include/asm-x86/hvm/vlapic.h | 4 ++++ 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/xen/arch/x86/hvm/vlapic.c b/xen/arch/x86/hvm/vlapic.c index cf8ee50..4320c6e 100644 --- a/xen/arch/x86/hvm/vlapic.c +++ b/xen/arch/x86/hvm/vlapic.c @@ -1003,14 +1003,12 @@ bool_t vlapic_msr_set(struct vlapic *vlapic, uint64= _t value) } else { - if ( unlikely(vlapic_x2apic_mode(vlapic)) ) - return 0; vlapic->hw.disabled |=3D VLAPIC_HW_DISABLED; pt_may_unmask_irq(vlapic_domain(vlapic), NULL); } } - else if ( !(value & MSR_IA32_APICBASE_ENABLE) && - unlikely(value & MSR_IA32_APICBASE_EXTD) ) + else if ( ((vlapic->hw.apic_base_msr ^ value) & MSR_IA32_APICBASE_EXTD= ) && + unlikely(!vlapic_xapic_mode(vlapic)) ) return 0; =20 vlapic->hw.apic_base_msr =3D value; diff --git a/xen/include/asm-x86/hvm/vlapic.h b/xen/include/asm-x86/hvm/vla= pic.h index 4656293..a63fcd5 100644 --- a/xen/include/asm-x86/hvm/vlapic.h +++ b/xen/include/asm-x86/hvm/vlapic.h @@ -51,8 +51,12 @@ =20 #define vlapic_base_address(vlapic) \ ((vlapic)->hw.apic_base_msr & MSR_IA32_APICBASE_BASE) +/* Only check EXTD bit as EXTD can't be set if it is disabled by hardware = */ #define vlapic_x2apic_mode(vlapic) \ ((vlapic)->hw.apic_base_msr & MSR_IA32_APICBASE_EXTD) +#define vlapic_xapic_mode(vlapic) \ + (!vlapic_hw_disabled(vlapic) && \ + !((vlapic)->hw.apic_base_msr & MSR_IA32_APICBASE_EXTD)) =20 /* * Generic APIC bitmap vector update & search routines. -- generated by git-patchbot for /home/xen/git/xen.git#master _______________________________________________ Xen-changelog mailing list Xen-changelog@lists.xen.org https://lists.xenproject.org/xen-changelog --94eb2c0c832620ca2f05517b50cb-- --===============0798531755081607840== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5v cmcveGVuLWRldmVsCg== --===============0798531755081607840==--