XSAVES is a kernel-mode instruction. It offers a compacted format and
memory-write optimization. These patches fix issues in the first
implementation.
Changes since Version 5:
Patch 1, 2 - Change names to fpu_user_xstate_size and fpu_kernel_xstate_size;
fix some comments, etc.
Patch 11 - In addition to a warning, make __raw_xsave_addr() return NULL
when a disabled xstate component address is requested.
Patch 12 - Add more details in the comments of why this patch is needed;
make a new macro for xcomp_bv[63].
Yu-cheng Yu (13):
x86/xsaves: Define and use fpu_user_xstate_size
x86/xsaves: Rename xstate_size to fpu_kernel_xstate_size to
distinguish from fpu_user_xstate_size
x86/xsaves: Keep init_fpstate.xsave.header.xfeatures as zero for init
optimization
x86/xsaves: Introduce a new check that allows correct xstates copy
from kernel to user directly
x86/xsaves: Align xstate components according to CPUID
x86/xsaves: Supervisor state component offset
x86/xsaves: Fix PTRACE frames for XSAVES
x86/xsaves: Fix XSTATE component offset print out
x86/xsaves: Fix xstate_offsets, xstate_sizes for non-extended states
x86/xsaves: Fix __fpu_restore_sig() for XSAVES
x86/xsaves: When a disabled xstate component offset is requested,
return NULL
x86/xsaves: Fix fpstate_init() for XRSTORS
x86/xsaves: Re-enable XSAVES
arch/x86/include/asm/fpu/types.h | 7 +
arch/x86/include/asm/fpu/xstate.h | 10 +-
arch/x86/include/asm/processor.h | 3 +-
arch/x86/kernel/fpu/core.c | 11 +-
arch/x86/kernel/fpu/init.c | 34 ++--
arch/x86/kernel/fpu/regset.c | 56 +++--
arch/x86/kernel/fpu/signal.c | 43 +++-
arch/x86/kernel/fpu/xstate.c | 417 ++++++++++++++++++++++++++++++--------
8 files changed, 440 insertions(+), 141 deletions(-)
--
1.9.1
