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
61 lines
2.0 KiB
Diff
61 lines
2.0 KiB
Diff
References: bnc#701686
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# HG changeset patch
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# User Jan Beulich <jbeulich@novell.com>
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# Date 1314004270 -3600
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# Node ID 25dfe53bb1898b3967ceb71a7eb60a8b760c25fb
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# Parent 0849b0e59e2418e8215616df147f955b01b07577
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x86/IO-APIC: clear remoteIRR in clear_IO_APIC_pin()
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It was found that in a crash scenario, the remoteIRR bit in an IO-APIC
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RTE could be left set, causing problems when bringing up a kdump
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kernel. While this generally is most important to be taken care of in
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the new kernel (which usually would be a native one), it still seems
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desirable to also address this problem in Xen so that (a) the problem
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doesn't bite Xen when used as a secondary emergency kernel and (b) an
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attempt is being made to save un-fixed secondary kernels from running
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into said problem.
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Based on a Linux patch from suresh.b.siddha@intel.com.
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Signed-off-by: Jan Beulich <jbeulich@novell.com>
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--- a/xen/arch/x86/io_apic.c
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+++ b/xen/arch/x86/io_apic.c
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@@ -481,11 +481,35 @@ static void clear_IO_APIC_pin(unsigned i
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return;
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/*
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+ * Make sure the entry is masked and re-read the contents to check
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+ * if it is a level triggered pin and if the remoteIRR is set.
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+ */
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+ if (!entry.mask) {
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+ entry.mask = 1;
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+ __ioapic_write_entry(apic, pin, FALSE, entry);
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+ }
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+ entry = __ioapic_read_entry(apic, pin, TRUE);
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+
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+ if (entry.irr) {
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+ /* Make sure the trigger mode is set to level. */
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+ if (!entry.trigger) {
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+ entry.trigger = 1;
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+ __ioapic_write_entry(apic, pin, TRUE, entry);
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+ }
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+ __io_apic_eoi(apic, entry.vector, pin);
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+ }
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+
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+ /*
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* Disable it in the IO-APIC irq-routing table:
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*/
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memset(&entry, 0, sizeof(entry));
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entry.mask = 1;
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__ioapic_write_entry(apic, pin, TRUE, entry);
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+
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+ entry = __ioapic_read_entry(apic, pin, TRUE);
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+ if (entry.irr)
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+ printk(KERN_ERR "IO-APIC%02x-%u: Unable to reset IRR\n",
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+ IO_APIC_ID(apic), pin);
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}
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static void clear_IO_APIC (void)
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