The following commit has been merged into the x86/urgent branch of tip:
Commit-ID: a9f84fb7158fea60cbcadef5c0166fb22b469091
Gitweb: https://git.kernel.org/tip/a9f84fb7158fea60cbcadef5c0166fb22b469091
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Thu, 24 Mar 2022 14:47:08 +01:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Tue, 29 Mar 2022 20:57:18 +02:00
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 <tglx@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lore.kernel.org/r/20220324134623.408932232@xxxxxxxxxxxxx
---
arch/x86/kernel/fpu/core.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 19821f0..c049561 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);
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