I added a field for the MSACSR register in struct mips_fpu_struct, but never actually made use of it... This is a clear bug. Save and restore the MSACSR register along with the vector registers. Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx> --- arch/mips/include/asm/asmmacro.h | 11 +++++++++++ arch/mips/kernel/asm-offsets.c | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/mips/include/asm/asmmacro.h b/arch/mips/include/asm/asmmacro.h index 935543f..4986bf5 100644 --- a/arch/mips/include/asm/asmmacro.h +++ b/arch/mips/include/asm/asmmacro.h @@ -10,6 +10,7 @@ #include <asm/hazards.h> #include <asm/asm-offsets.h> +#include <asm/msa.h> #ifdef CONFIG_32BIT #include <asm/asmmacro-32.h> @@ -378,9 +379,19 @@ st_d 29, THREAD_FPR29, \thread st_d 30, THREAD_FPR30, \thread st_d 31, THREAD_FPR31, \thread + .set push + .set noat + cfcmsa $1, MSA_CSR + sw $1, THREAD_MSA_CSR(\thread) + .set pop .endm .macro msa_restore_all thread + .set push + .set noat + lw $1, THREAD_MSA_CSR(\thread) + ctcmsa MSA_CSR, $1 + .set pop ld_d 0, THREAD_FPR0, \thread ld_d 1, THREAD_FPR1, \thread ld_d 2, THREAD_FPR2, \thread diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index 4bb5107..b1d84bd 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -234,6 +234,7 @@ void output_thread_fpu_defines(void) thread.fpu.fpr[31].val64[FPR_IDX(64, 0)]); OFFSET(THREAD_FCR31, task_struct, thread.fpu.fcr31); + OFFSET(THREAD_MSA_CSR, task_struct, thread.fpu.msacsr); BLANK(); } -- 2.0.1
