Commit abf110f3 authored by Michael Ellerman's avatar Michael Ellerman

powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again

For PowerVM migration we want to be able to call setup_rfi_flush()
again after we've migrated the partition.

To support that we need to check that we're not trying to allocate the
fallback flush area after memblock has gone away (i.e., boot-time only).
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: default avatarMauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 1e2a9fc7
...@@ -49,7 +49,7 @@ enum l1d_flush_type { ...@@ -49,7 +49,7 @@ enum l1d_flush_type {
L1D_FLUSH_MTTRIG = 0x8, L1D_FLUSH_MTTRIG = 0x8,
}; };
void __init setup_rfi_flush(enum l1d_flush_type, bool enable); void setup_rfi_flush(enum l1d_flush_type, bool enable);
void do_rfi_flush_fixups(enum l1d_flush_type types); void do_rfi_flush_fixups(enum l1d_flush_type types);
#endif /* !__ASSEMBLY__ */ #endif /* !__ASSEMBLY__ */
......
...@@ -860,6 +860,10 @@ static void init_fallback_flush(void) ...@@ -860,6 +860,10 @@ static void init_fallback_flush(void)
u64 l1d_size, limit; u64 l1d_size, limit;
int cpu; int cpu;
/* Only allocate the fallback flush area once (at boot time). */
if (l1d_flush_fallback_area)
return;
l1d_size = ppc64_caches.l1d.size; l1d_size = ppc64_caches.l1d.size;
limit = min(ppc64_bolted_size(), ppc64_rma_size); limit = min(ppc64_bolted_size(), ppc64_rma_size);
...@@ -877,7 +881,7 @@ static void init_fallback_flush(void) ...@@ -877,7 +881,7 @@ static void init_fallback_flush(void)
} }
} }
void __init setup_rfi_flush(enum l1d_flush_type types, bool enable) void setup_rfi_flush(enum l1d_flush_type types, bool enable)
{ {
if (types & L1D_FLUSH_FALLBACK) { if (types & L1D_FLUSH_FALLBACK) {
pr_info("rfi-flush: Using fallback displacement flush\n"); pr_info("rfi-flush: Using fallback displacement flush\n");
......
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