da53445dea
recursive pagetable for 32-bit PV guests (XSA-185) 57d1563d-x86-32on64-don-t-allow-recursive-page-tables-from-L3.patch - bsc#995789 - VUL-0: CVE-2016-7093: xen: x86: Mishandling of instruction pointer truncation during emulation (XSA-186) 57d15679-x86-emulate-Correct-boundary-interactions-of-emulated-insns.patch 57d18642-hvm-fep-Allow-test-insns-crossing-1-0-boundary.patch - bsc#995792 - VUL-0: CVE-2016-7094: xen: x86 HVM: Overflow of sh_ctxt->seg_reg[] (XSA-187) 57d1569a-x86-shadow-Avoid-overflowing-sh_ctxt-seg_reg.patch 57d18642-x86-segment-Bounds-check-accesses-to-emulation-ctxt-seg_reg.patch - bsc#991934 - xen hypervisor crash in csched_acct 57c96df3-credit1-fix-a-race-when-picking-initial-pCPU.patch - Upstream patches from Jan 57c4412b-x86-HVM-add-guarding-logic-for-VMX-specific-code.patch 57c57f73-libxc-correct-max_pfn-calculation-for-saving-domain.patch 57c805bf-x86-levelling-restrict-non-architectural-OSXSAVE-handling.patch 57c805c1-x86-levelling-pass-vcpu-to-ctxt_switch_levelling.patch 57c805c3-x86-levelling-provide-architectural-OSXSAVE-handling.patch 57c82be2-x86-32on64-adjust-call-gate-emulation.patch 57c96e2c-x86-correct-PT_NOTE-file-position.patch 57cfed43-VMX-correct-feature-checks-for-MPX-and-XSAVES.patch - bsc#989679 - [pvusb feature] USB device not found when 'virsh detach-device guest usb.xml' 57c93e52-fix-error-in-libxl_device_usbdev_list.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=450
33 lines
1.2 KiB
Diff
33 lines
1.2 KiB
Diff
References: bsc#995789
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# Commit 7b5cee79dad24e7006059667b02bd7de685d8ee5
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# Date 2016-09-08 16:39:46 +0100
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# Author Andrew Cooper <andrew.cooper3@citrix.com>
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# Committer Andrew Cooper <andrew.cooper3@citrix.com>
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hvm/fep: Allow testing of instructions crossing the -1 -> 0 virtual boundary
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The Force Emulation Prefix is named to follow its PV counterpart for cpuid or
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rdtsc, but isn't really an instruction prefix. It behaves as a break-out into
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Xen, with the purpose of emulating the next instruction in the current state.
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It is important to be able to test legal situations which occur in real
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hardware, including instruction which cross certain boundaries, and
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instructions starting at 0.
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Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
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Reviewed-by: Jan Beulich <jbeulich@suse.com>
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--- a/xen/arch/x86/hvm/hvm.c
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+++ b/xen/arch/x86/hvm/hvm.c
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@@ -3905,6 +3905,10 @@ void hvm_ud_intercept(struct cpu_user_re
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{
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regs->eip += sizeof(sig);
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regs->eflags &= ~X86_EFLAGS_RF;
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+
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+ /* Zero the upper 32 bits of %rip if not in long mode. */
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+ if ( !(hvm_long_mode_enabled(cur) && cs.attr.fields.l) )
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+ regs->eip = regs->_eip;
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}
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}
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