From 104a54a307b08945365faf6d285cd5a02f94a80f Mon Sep 17 00:00:00 2001 From: Ross Lagerwall Date: Mon, 15 Aug 2022 15:43:08 +0200 Subject: [PATCH 038/126] x86/amd: only call setup_force_cpu_cap for boot CPU This should only be called for the boot CPU to avoid calling _init code after it has been unloaded. Fixes: 062868a5a8b4 ("x86/amd: Work around CLFLUSH ordering on older parts") Signed-off-by: Ross Lagerwall Reviewed-by: Jan Beulich master commit: 31b41ce858c8bd5159212d40969f8e0b7124bbf0 master date: 2022-08-11 17:44:26 +0200 --- xen/arch/x86/cpu/amd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/cpu/amd.c b/xen/arch/x86/cpu/amd.c index 60dbe61a61ca..a8d2fb8a1590 100644 --- a/xen/arch/x86/cpu/amd.c +++ b/xen/arch/x86/cpu/amd.c @@ -820,7 +820,7 @@ static void init_amd(struct cpuinfo_x86 *c) * everything, including reads and writes to address, and * LFENCE/SFENCE instructions. */ - if (!cpu_has_clflushopt) + if (c == &boot_cpu_data && !cpu_has_clflushopt) setup_force_cpu_cap(X86_BUG_CLFLUSH_MFENCE); switch(c->x86) -- 2.37.4