diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2017-06-16 15:16:13 -0500 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-06-27 16:14:15 +0000 |
| commit | 8ade68a2701603785d4acefc02ce3d7482b6beff (patch) | |
| tree | 60692857eb1ac3a0d035011c2de4ce890ff5894f /src/cpu/x86/sipi_vector.S | |
| parent | 604f69868ffc47c4cfc7623c83ccff89a0afcee8 (diff) | |
cpu/x86/smm: allow SSE instructions in SMM modules
If SSE instructions are enabled in the build assume the SMM
modules are compiled with SSE instructions. As such enable
the SSE instructions in SMM mode by setting up the cr4 register.
In addition, provide a place to save and restore the SSE state
in both the relocation handler and permanent handler.
Change-Id: Ifa16876b57544919fde88fba5b8f18e4ca286841
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/20244
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/cpu/x86/sipi_vector.S')
| -rw-r--r-- | src/cpu/x86/sipi_vector.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/cpu/x86/sipi_vector.S b/src/cpu/x86/sipi_vector.S index 1c5120763e..e65491507e 100644 --- a/src/cpu/x86/sipi_vector.S +++ b/src/cpu/x86/sipi_vector.S @@ -185,6 +185,13 @@ load_msr: and $~(CR0_CLEAR_FLAGS_CACHE_ENABLE), %eax mov %eax, %cr0 +#if IS_ENABLED(CONFIG_SSE) + /* Enable sse instructions. */ + mov %cr4, %eax + orl $(CR4_OSFXSR | CR4_OSXMMEXCPT), %eax + mov %eax, %cr4 +#endif + /* c_handler(cpu_num) */ push %esi /* cpu_num */ mov c_handler, %eax |