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authorMichael Ellerman <mpe@ellerman.id.au>2017-10-12 21:17:18 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-10-21 09:33:05 +1100
commit54820530c5faa9fd78e1c08cb6449100b1a19157 (patch)
treeb7b605fd74c9435143d6c3464d4c829e95ea8141 /arch/powerpc/include/asm/powernv.h
parentcba6ac4869e45cc93ac5497024d1d49576e82666 (diff)
powerpc/powernv: Enable TM without suspend if possible
Some Power9 revisions can run in a mode where TM operates without suspended state. If we find ourself on a CPU that might be in this mode, we query OPAL to check, and if so we reenable TM in CPU features, and enable a new user feature to signal to userspace that we are in this mode. We do not enable the "normal" user feature, PPC_FEATURE2_HTM, but we do enable PPC_FEATURE2_HTM_NOSC because that indicates to userspace that the kernel will abort transactions on syscall entry, which is true regardless of the suspend mode. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/powernv.h')
-rw-r--r--arch/powerpc/include/asm/powernv.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/powernv.h b/arch/powerpc/include/asm/powernv.h
index f62797702300..dc5f6a5d4575 100644
--- a/arch/powerpc/include/asm/powernv.h
+++ b/arch/powerpc/include/asm/powernv.h
@@ -22,6 +22,8 @@ extern void pnv_npu2_destroy_context(struct npu_context *context,
extern int pnv_npu2_handle_fault(struct npu_context *context, uintptr_t *ea,
unsigned long *flags, unsigned long *status,
int count);
+
+void pnv_tm_init(void);
#else
static inline void powernv_set_nmmu_ptcr(unsigned long ptcr) { }
static inline struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev,
@@ -36,6 +38,8 @@ static inline int pnv_npu2_handle_fault(struct npu_context *context,
unsigned long *status, int count) {
return -ENODEV;
}
+
+static inline void pnv_tm_init(void) { }
#endif
#endif /* _ASM_POWERNV_H */