edf6bf0381
23955-x86-pv-cpuid-xsave.patch 23957-cpufreq-error-paths.patch - Upstream patches from Jan 23933-pt-bus2bridge-update.patch 23726-x86-intel-flexmigration-v2.patch 23925-x86-AMD-ARAT-Fam12.patch 23246-x86-xsave-enable.patch 23897-x86-mce-offline-again.patch - Update to Xen 4.1.2_rc3 c/s 23171 - bnc#720054 - Changed /etc/udev/rules.d/40-xen.rules to not run Xen's vif-bridge script when not running Xen. This is not a solution to the bug but an improvement in the rules regardless. Updated udev-rules.patch - Upstream patches from Jan 23868-vtd-RMRR-validation.patch 23871-x86-microcode-amd-silent.patch 23898-cc-option-grep.patch - Add pciback init script and sysconf file, giving users a simple mechanism to configure pciback. init.pciback sysconfig.pciback - update scripts to use xl -f, or xm if xend is running: xen-updown.sh, init.xendomains, xmclone.sh OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=146
62 lines
2.1 KiB
Diff
62 lines
2.1 KiB
Diff
# HG changeset patch
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# User Shan Haitao <haitao.shan@intel.com>
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# Date 1316300518 -3600
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# Node ID b78235de5c6407023759f9bbf723dd83887fedf0
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# Parent c944e82bb092925f31403a129087e9d40e0fa06a
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Fix PV CPUID virtualization of XSave
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The patch will fix XSave CPUID virtualization for PV guests. The XSave
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area size returned by CPUID leaf D is changed dynamically depending on
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the XCR0. Tools/libxc only assigns a static value. The fix will adjust
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xsave area size during runtime.
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Note: This fix is already in HVM cpuid virtualization. And Dom0 is not
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affected, either.
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Signed-off-by: Shan Haitao <haitao.shan@intel.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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@@ -2310,7 +2310,7 @@ void hvm_cpuid(unsigned int input, unsig
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{
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/* reset EBX to default value first */
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*ebx = XSAVE_AREA_MIN_SIZE;
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- for ( sub_leaf = 2; sub_leaf < 64; sub_leaf++ )
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+ for ( sub_leaf = 2; sub_leaf < 63; sub_leaf++ )
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{
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if ( !(v->arch.xcr0 & (1ULL << sub_leaf)) )
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continue;
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--- a/xen/arch/x86/traps.c
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+++ b/xen/arch/x86/traps.c
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@@ -768,6 +768,30 @@ static void pv_cpuid(struct cpu_user_reg
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{
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if ( !cpuid_hypervisor_leaves(a, c, &a, &b, &c, &d) )
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domain_cpuid(current->domain, a, c, &a, &b, &c, &d);
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+
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+ switch ( a )
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+ {
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+ case 0xd:
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+ {
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+ unsigned int sub_leaf, _eax, _ebx, _ecx, _edx;
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+ /* EBX value of main leaf 0 depends on enabled xsave features */
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+ if ( c == 0 && current->arch.xcr0 )
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+ {
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+ /* reset EBX to default value first */
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+ b = XSAVE_AREA_MIN_SIZE;
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+ for ( sub_leaf = 2; sub_leaf < 63; sub_leaf++ )
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+ {
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+ if ( !(current->arch.xcr0 & (1ULL << sub_leaf)) )
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+ continue;
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+ domain_cpuid(current->domain, a, c, &_eax, &_ebx, &_ecx,
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+ &_edx);
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+ if ( (_eax + _ebx) > b )
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+ b = _eax + _ebx;
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+ }
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+ }
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+ break;
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+ }
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+ }
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goto out;
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}
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