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| author | Ingo Molnar <mingo@kernel.org> | 2020-07-28 14:18:01 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-07-28 14:18:01 +0300 |
| commit | e89d4ca1df630378bde3e36c42001b755b0044fe (patch) | |
| tree | d953ccecb8365acab65d0075e674f7e9a9bd9880 /arch/x86/kernel/fpu | |
| parent | 2ac5413e5edca6910d2ae157187a889e94be2b62 (diff) | |
| parent | 92ed301919932f777713b9172e525674157e983d (diff) | |
| download | linux-e89d4ca1df630378bde3e36c42001b755b0044fe.tar.xz | |
Merge tag 'v5.8-rc7' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/fpu')
| -rw-r--r-- | arch/x86/kernel/fpu/core.c | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 1bb7532f5f34..eb86a2b831b1 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -140,6 +140,12 @@ void kernel_fpu_begin(void) copy_fpregs_to_fpstate(¤t->thread.fpu); } __cpu_invalidate_fpregs_state(); + + if (boot_cpu_has(X86_FEATURE_XMM)) + ldmxcsr(MXCSR_DEFAULT); + + if (boot_cpu_has(X86_FEATURE_FPU)) + asm volatile ("fninit"); } EXPORT_SYMBOL_GPL(kernel_fpu_begin); diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 10cf8789c378..be2a68a09d19 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -1079,7 +1079,7 @@ int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int of copy_part(offsetof(struct fxregs_state, st_space), 128, &xsave->i387.st_space, &kbuf, &offset_start, &count); if (header.xfeatures & XFEATURE_MASK_SSE) - copy_part(xstate_offsets[XFEATURE_MASK_SSE], 256, + copy_part(xstate_offsets[XFEATURE_SSE], 256, &xsave->i387.xmm_space, &kbuf, &offset_start, &count); /* * Fill xsave->i387.sw_reserved value for ptrace frame: |