From: Michael Ellerman <mpe@ellerman.id.au>
To: linuxppc-dev@ozlabs.org
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
peterz@infradead.org, npiggin@gmail.com, anton@samba.org,
mikey@neuling.org, oohall@gmail.com, paulus@samba.org
Subject: [PATCH 01/11] powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper
Date: Tue, 9 Jan 2018 03:54:43 +1100 [thread overview]
Message-ID: <20180108165453.26066-1-mpe@ellerman.id.au> (raw)
From: Michael Neuling <mikey@neuling.org>
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>
---
arch/powerpc/include/asm/hvcall.h | 17 +++++++++++++++++
arch/powerpc/include/asm/plpar_wrappers.h | 14 ++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
index a409177be8bd..f0461618bf7b 100644
--- a/arch/powerpc/include/asm/hvcall.h
+++ b/arch/powerpc/include/asm/hvcall.h
@@ -241,6 +241,7 @@
#define H_GET_HCA_INFO 0x1B8
#define H_GET_PERF_COUNT 0x1BC
#define H_MANAGE_TRACE 0x1C0
+#define H_GET_CPU_CHARACTERISTICS 0x1C8
#define H_FREE_LOGICAL_LAN_BUFFER 0x1D4
#define H_QUERY_INT_STATE 0x1E4
#define H_POLL_PENDING 0x1D8
@@ -330,6 +331,17 @@
#define H_SIGNAL_SYS_RESET_ALL_OTHERS -2
/* >= 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 */
#define PROC_TABLE_OP_MASK 0x18
#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 /* __KERNEL__ */
#endif /* _ASM_POWERPC_HVCALL_H */
diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h
index 7f01b22fa6cb..55eddf50d149 100644
--- a/arch/powerpc/include/asm/plpar_wrappers.h
+++ b/arch/powerpc/include/asm/plpar_wrappers.h
@@ -326,4 +326,18 @@ static inline long plapr_signal_sys_reset(long 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 */
--
2.14.3
next reply other threads:[~2018-01-08 16:55 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-08 16:54 Michael Ellerman [this message]
2018-01-08 16:54 ` [PATCH 02/11] powerpc/64: Add macros for annotating the destination of rfid/hrfid Michael Ellerman
2018-01-08 16:54 ` [PATCH 03/11] powerpc/64s: Simple RFI macro conversions Michael Ellerman
2018-01-08 17:09 ` Peter Zijlstra
2018-01-08 21:01 ` Paul Mackerras
2018-01-08 22:04 ` Michael Ellerman
2018-01-08 16:54 ` [PATCH 04/11] powerpc/64: Convert the syscall exit path to use RFI_TO_USER/KERNEL Michael Ellerman
2018-01-08 16:54 ` [PATCH 05/11] powerpc/64: Convert fast_exception_return " Michael Ellerman
2018-01-08 16:54 ` [PATCH 06/11] powerpc/64s: Convert slb_miss_common " Michael Ellerman
2018-01-08 16:54 ` [PATCH 07/11] powerpc/64s: Add support for RFI flush of L1-D cache Michael Ellerman
2018-01-09 7:02 ` Joel Stanley
2018-01-09 16:05 ` Michael Ellerman
2018-01-25 9:10 ` Christian Zigotzky
2018-01-30 2:11 ` Michael Ellerman
2018-01-08 16:54 ` [PATCH 08/11] powerpc/64s: Support disabling RFI flush with no_rfi_flush and nopti Michael Ellerman
2018-01-08 16:54 ` [PATCH 09/11] powerpc/64s: Allow control of RFI flush via sysfs Michael Ellerman
2018-01-08 17:20 ` Thomas Gleixner
2018-01-08 22:09 ` Michael Ellerman
2018-01-09 6:06 ` Jon Masters
2018-01-09 8:05 ` Greg KH
2018-01-09 8:11 ` Jon Masters
2018-01-09 8:03 ` Greg KH
2018-01-08 16:54 ` [PATCH 10/11] powerpc/pseries: Query hypervisor for RFI flush settings Michael Ellerman
2018-01-08 16:54 ` [PATCH 11/11] powerpc/powernv: Check device-tree " Michael Ellerman
2018-01-08 21:57 ` Tyrel Datwyler
2018-01-11 2:25 ` [01/11] powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper Michael Ellerman
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