diff options
Diffstat (limited to 'usr/src/uts/sun4v/cpu/niagara2.c')
| -rw-r--r-- | usr/src/uts/sun4v/cpu/niagara2.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/usr/src/uts/sun4v/cpu/niagara2.c b/usr/src/uts/sun4v/cpu/niagara2.c index 1503304a30..2735b47016 100644 --- a/usr/src/uts/sun4v/cpu/niagara2.c +++ b/usr/src/uts/sun4v/cpu/niagara2.c @@ -72,6 +72,19 @@ static hsvc_info_t niagara2_hsvc = { NIAGARA2_HSVC_MINOR, cpu_module_name }; +#ifdef N2_1x_CPC_WORKAROUNDS +static uint64_t cpu_ver; /* Niagara2 CPU version reg */ +uint64_t ni2_1x_perf_workarounds = 0; + +/* Niagara2 CPU version register */ +#define VER_MASK_MAJOR_SHIFT 28 +#define VER_MASK_MAJOR_MASK 0xf + +extern uint64_t va_to_pa(void *); +extern uint64_t ni2_getver(); /* HV code to get %hver */ +extern uint64_t niagara2_getver(uint64_t ni2_getver_ra, uint64_t *cpu_version); +#endif + void cpu_setup(void) { @@ -79,6 +92,15 @@ cpu_setup(void) extern int cpc_has_overflow_intr; int status; +#ifdef N2_1x_CPC_WORKAROUNDS + /* + * Get CPU version for Niagara2 part. + */ + if (niagara2_getver(va_to_pa((void *)ni2_getver), &cpu_ver) == H_EOK && + ((cpu_ver >> VER_MASK_MAJOR_SHIFT) & VER_MASK_MAJOR_MASK) <= 1) + ni2_1x_perf_workarounds = 1; +#endif + /* * Negotiate the API version for Niagara2 specific hypervisor * services. |