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powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper 

A new hypervisor call has been defined to communicate various
characteristics of the CPU to guests. Add definitions for the hcall
number, flags and a wrapper function.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Neuling 2018-01-09 03:52:05 +11:00 committed by Michael Ellerman
parent ae64f9bd1d
commit 191eccb158
2 changed files with 31 additions and 0 deletions
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17
arch/powerpc/include/asm/hvcall.h
View File

@ -241,6 +241,7 @@
#define H_GET_HCA_INFO 0x1B8 #define H_GET_HCA_INFO 0x1B8
#define H_GET_PERF_COUNT 0x1BC #define H_GET_PERF_COUNT 0x1BC
#define H_MANAGE_TRACE 0x1C0 #define H_MANAGE_TRACE 0x1C0
#define H_GET_CPU_CHARACTERISTICS 0x1C8
#define H_FREE_LOGICAL_LAN_BUFFER 0x1D4 #define H_FREE_LOGICAL_LAN_BUFFER 0x1D4
#define H_QUERY_INT_STATE 0x1E4 #define H_QUERY_INT_STATE 0x1E4
#define H_POLL_PENDING 0x1D8 #define H_POLL_PENDING 0x1D8
@ -330,6 +331,17 @@
#define H_SIGNAL_SYS_RESET_ALL_OTHERS -2 #define H_SIGNAL_SYS_RESET_ALL_OTHERS -2
/* >= 0 values are CPU number */ /* >= 0 values are CPU number */
/* H_GET_CPU_CHARACTERISTICS return values */
#define H_CPU_CHAR_SPEC_BAR_ORI31 (1ull << 63) // IBM bit 0
#define H_CPU_CHAR_BCCTRL_SERIALISED (1ull << 62) // IBM bit 1
#define H_CPU_CHAR_L1D_FLUSH_ORI30 (1ull << 61) // IBM bit 2
#define H_CPU_CHAR_L1D_FLUSH_TRIG2 (1ull << 60) // IBM bit 3
#define H_CPU_CHAR_L1D_THREAD_PRIV (1ull << 59) // IBM bit 4
#define H_CPU_BEHAV_FAVOUR_SECURITY (1ull << 63) // IBM bit 0
#define H_CPU_BEHAV_L1D_FLUSH_PR (1ull << 62) // IBM bit 1
#define H_CPU_BEHAV_BNDS_CHK_SPEC_BAR (1ull << 61) // IBM bit 2
/* Flag values used in H_REGISTER_PROC_TBL hcall */ /* Flag values used in H_REGISTER_PROC_TBL hcall */
#define PROC_TABLE_OP_MASK 0x18 #define PROC_TABLE_OP_MASK 0x18
#define PROC_TABLE_DEREG 0x10 #define PROC_TABLE_DEREG 0x10
@ -436,6 +448,11 @@ static inline unsigned int get_longbusy_msecs(int longbusy_rc)
} }
} }
struct h_cpu_char_result {
u64 character;
u64 behaviour;
};
#endif /* __ASSEMBLY__ */ #endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_HVCALL_H */ #endif /* _ASM_POWERPC_HVCALL_H */

14
arch/powerpc/include/asm/plpar_wrappers.h
View File

@ -326,4 +326,18 @@ static inline long plapr_signal_sys_reset(long cpu)
return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu); return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu);
} }
static inline long plpar_get_cpu_characteristics(struct h_cpu_char_result *p)
{
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
long rc;
rc = plpar_hcall(H_GET_CPU_CHARACTERISTICS, retbuf);
if (rc == H_SUCCESS) {
p->character = retbuf[0];
p->behaviour = retbuf[1];
}
return rc;
}
#endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */ #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */