From: Thomas Gleixner Date: Thu, 24 Mar 2022 13:47:08 +0000 (+0100) Subject: x86/fpu: Remove redundant XCOMP_BV initialization X-Git-Tag: v5.18-rc1~3^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a9f84fb7158fea60cbcadef5c0166fb22b469091;p=thirdparty%2Flinux.git x86/fpu: Remove redundant XCOMP_BV initialization fpu_copy_uabi_to_guest_fpstate() initializes the XCOMP_BV field in the XSAVE header. That's a leftover from the old KVM FPU buffer handling code. Since d69c1382e1b7 ("x86/kvm: Convert FPU handling to a single swap buffer") KVM uses the FPU core allocation code, which initializes the XCOMP_BV field already. Signed-off-by: Thomas Gleixner Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/20220324134623.408932232@linutronix.de --- diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 19821f027cb39..c049561f373a0 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -415,9 +415,6 @@ int fpu_copy_uabi_to_guest_fpstate(struct fpu_guest *gfpu, const void *buf, xpkru = get_xsave_addr(&kstate->regs.xsave, XFEATURE_PKRU); *vpkru = xpkru->pkru; } - - /* Ensure that XCOMP_BV is set up for XSAVES */ - xstate_init_xcomp_bv(&kstate->regs.xsave, kstate->xfeatures); return 0; } EXPORT_SYMBOL_GPL(fpu_copy_uabi_to_guest_fpstate);