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* [PATCH 01/11] powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper
@ 2018-01-08 16:54 Michael Ellerman
  2018-01-08 16:54 ` [PATCH 02/11] powerpc/64: Add macros for annotating the destination of rfid/hrfid Michael Ellerman
                   ` (10 more replies)
  0 siblings, 11 replies; 26+ messages in thread
From: Michael Ellerman @ 2018-01-08 16:54 UTC (permalink / raw)
  To: linuxppc-dev
  Cc: linux-kernel, tglx, peterz, npiggin, anton, mikey, oohall, paulus

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

^ permalink raw reply related	[flat|nested] 26+ messages in thread
end of thread, other threads:[~2018-01-30  2:11 UTC | newest]

Thread overview: 26+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-08 16:54 [PATCH 01/11] powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper Michael Ellerman
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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