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openSUSE:Evergreen:Maintenance:114
xen.openSUSE_Evergreen_11.4
22645-amd-flush-filter.patch
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File 22645-amd-flush-filter.patch of Package xen.openSUSE_Evergreen_11.4
# HG changeset patch # User Keir Fraser <keir@xen.org> # Date 1294220923 0 # Node ID 76d897a06b316bf2278220b006d578faf31ce3fb # Parent fece73d4d30985ce40ef87dcd379ce6beb8aadf3 x86 amd: Revert 6382:b74c15e4dd4f (AMD flush filter configuration) Flush filter is not reliably supported by any processor, we already have code to unconditionally disable the filter, so we don't need the command-line config option. Remove it. Signed-off-by: Keir Fraser <keir@xen.org> Index: xen-4.0.3-testing/xen/arch/x86/cpu/amd.c =================================================================== --- xen-4.0.3-testing.orig/xen/arch/x86/cpu/amd.c +++ xen-4.0.3-testing/xen/arch/x86/cpu/amd.c @@ -237,20 +237,6 @@ int cpu_has_amd_erratum(const struct cpu return 0; } -/* - * amd_flush_filter={on,off}. Forcibly Enable or disable the TLB flush - * filter on AMD 64-bit processors. - */ -static int flush_filter_force; -static void flush_filter(char *s) -{ - if (!strcmp(s, "off")) - flush_filter_force = -1; - if (!strcmp(s, "on")) - flush_filter_force = 1; -} -custom_param("amd_flush_filter", flush_filter); - #define num_physpages 0 /* @@ -571,21 +557,6 @@ static void __devinit init_amd(struct cp break; } - if (c->x86 == 15) { - rdmsr(MSR_K7_HWCR, l, h); - printk(KERN_INFO "CPU%d: AMD Flush Filter %sabled", - smp_processor_id(), (l & (1<<6)) ? "dis" : "en"); - if ((flush_filter_force > 0) && (l & (1<<6))) { - l &= ~(1<<6); - printk(" -> Forcibly enabled"); - } else if ((flush_filter_force < 0) && !(l & (1<<6))) { - l |= 1<<6; - printk(" -> Forcibly disabled"); - } - wrmsr(MSR_K7_HWCR, l, h); - printk("\n"); - } - display_cacheinfo(c); if (cpuid_eax(0x80000000) >= 0x80000008) {
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