From: Jan Beulich Date: Fri, 5 Jul 2019 08:32:03 +0000 (+0200) Subject: x86/AMD: limit C1E disable family range X-Git-Tag: archive/raspbian/4.11.3+24-g14b62ab3e5-1+rpi1^2~55^2~124 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=93ad9197787ee07f3b5e4c44f54fde70d8092862;p=xen.git x86/AMD: limit C1E disable family range Just like for other family values of 0x17 (see "x86/AMD: correct certain Fam17 checks"), commit 3157bb4e13 ("Add MSR support for various feature AMD processor families") made the original check for Fam11 here include families all the way up to Fam17. The involved MSR (0xC0010055), however, is fully reserved starting from Fam16, and the two bits of interest are reserved for Fam12 and onwards (albeit I admit I wasn't able to find any Fam13 doc). Restore the upper bound to be Fam11. Signed-off-by: Jan Beulich Acked-by: Andrew Cooper master commit: 5c2926f576c9127a8d47217e0cafe00cc741c452 master date: 2019-06-18 16:34:51 +0200 --- diff --git a/xen/arch/x86/cpu/amd.c b/xen/arch/x86/cpu/amd.c index 894b892ef3..20fb515117 100644 --- a/xen/arch/x86/cpu/amd.c +++ b/xen/arch/x86/cpu/amd.c @@ -626,7 +626,7 @@ static void init_amd(struct cpuinfo_x86 *c) switch(c->x86) { - case 0xf ... 0x17: + case 0xf ... 0x11: disable_c1e(NULL); if (acpi_smi_cmd && (acpi_enable_value | acpi_disable_value)) pv_post_outb_hook = check_disable_c1e;