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openSUSE:Evergreen:11.1:kernel-2.6.32
xen
19039-x86-propagate-nolapic.patch
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File 19039-x86-propagate-nolapic.patch of Package xen
# HG changeset patch # User Keir Fraser <keir.fraser@citrix.com> # Date 1231930578 0 # Node ID 3fb43f23f64ccc1687d1dc348a9eb454397d4887 # Parent 59274c49a0298fd73f60759c0842a293b5816057 x86: propagate disabled APIC state to Dom0 This in particular eliminates the need to specify "noapic" to Dom0 when "noapic" is passed to Xen, provided the kernel side gets slightly modified to make use of this information (Linux side patch cannot easily be provided for the 2.6.18 tree, but this is being used by our 2.6.27-based one). Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: xen-3.3.1-testing/xen/arch/x86/traps.c =================================================================== --- xen-3.3.1-testing.orig/xen/arch/x86/traps.c +++ xen-3.3.1-testing/xen/arch/x86/traps.c @@ -711,6 +711,8 @@ static void pv_cpuid(struct cpu_user_reg { /* Modify Feature Information. */ __clear_bit(X86_FEATURE_VME, &d); + if ( !cpu_has_apic ) + __clear_bit(X86_FEATURE_APIC % 32, &d); __clear_bit(X86_FEATURE_PSE, &d); __clear_bit(X86_FEATURE_PGE, &d); __clear_bit(X86_FEATURE_MCE, &d); @@ -742,6 +744,8 @@ static void pv_cpuid(struct cpu_user_reg __clear_bit(X86_FEATURE_XTPR % 32, &c); __clear_bit(X86_FEATURE_PDCM % 32, &c); __clear_bit(X86_FEATURE_DCA % 32, &c); + if ( !cpu_has_apic ) + __clear_bit(X86_FEATURE_X2APIC % 32, &c); __set_bit(X86_FEATURE_HYPERVISOR % 32, &c); break; case 0x80000001: @@ -760,6 +764,8 @@ static void pv_cpuid(struct cpu_user_reg __clear_bit(X86_FEATURE_RDTSCP % 32, &d); __clear_bit(X86_FEATURE_SVME % 32, &c); + if ( !cpu_has_apic ) + __clear_bit(X86_FEATURE_EXTAPICSPACE % 32, &c); __clear_bit(X86_FEATURE_OSVW % 32, &c); __clear_bit(X86_FEATURE_IBS % 32, &c); __clear_bit(X86_FEATURE_SKINIT % 32, &c);
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