x86/fpu: Add uabi_size to guest_fpu

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Userspace needs to inquire KVM about the buffer size to work
with the new KVM_SET_XSAVE and KVM_GET_XSAVE2. Add the size info
to guest_fpu for KVM to access.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-18-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

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Thomas Gleixner 2022-01-05 04:35:28 -08:00 • committed by Paolo Bonzini

parent 690a757d61

commit c60427dd50

3 changed files with 7 additions and 0 deletions

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5

arch/x86/include/asm/fpu/types.h

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1

arch/x86/kernel/fpu/core.c

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1

arch/x86/kernel/fpu/xstate.c

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