diff options
| author | Kevin Tian <kevin.tian@intel.com> | 2022-01-05 13:35:20 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-01-14 19:43:22 +0100 |
| commit | 8eb9a48ac1e86a8a59f7123b529d6e498fb1f163 (patch) | |
| tree | f25e5222256212c863df324a76f714dd2d26bfc7 /arch/x86/include/asm/fpu | |
| parent | kvm: x86: Enable dynamic xfeatures at KVM_SET_CPUID2 (diff) | |
| download | linux-8eb9a48ac1e86a8a59f7123b529d6e498fb1f163.tar.xz linux-8eb9a48ac1e86a8a59f7123b529d6e498fb1f163.zip | |
x86/fpu: Provide fpu_update_guest_xfd() for IA32_XFD emulation
Guest XFD can be updated either in the emulation path or in the
restore path.
Provide a wrapper to update guest_fpu::fpstate::xfd. If the guest
fpstate is currently in-use, also update the per-cpu xfd cache and
the actual MSR.
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-10-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/fpu')
| -rw-r--r-- | arch/x86/include/asm/fpu/api.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/fpu/api.h b/arch/x86/include/asm/fpu/api.h index 1ed2a247a84e..e4d10155290b 100644 --- a/arch/x86/include/asm/fpu/api.h +++ b/arch/x86/include/asm/fpu/api.h @@ -140,6 +140,12 @@ extern void fpu_free_guest_fpstate(struct fpu_guest *gfpu); extern int fpu_swap_kvm_fpstate(struct fpu_guest *gfpu, bool enter_guest); extern int fpu_enable_guest_xfd_features(struct fpu_guest *guest_fpu, u64 xfeatures); +#ifdef CONFIG_X86_64 +extern void fpu_update_guest_xfd(struct fpu_guest *guest_fpu, u64 xfd); +#else +static inline void fpu_update_guest_xfd(struct fpu_guest *guest_fpu, u64 xfd) { } +#endif + extern void fpu_copy_guest_fpstate_to_uabi(struct fpu_guest *gfpu, void *buf, unsigned int size, u32 pkru); extern int fpu_copy_uabi_to_guest_fpstate(struct fpu_guest *gfpu, const void *buf, u64 xcr0, u32 *vpkru); |