提交 9d0e6d9d 编写于 作者: G Greg Kurz 提交者: Michael Ellerman

powerpc/vphn: clarify the H_HOME_NODE_ASSOCIATIVITY API

The number of values returned by the H_HOME_NODE_ASSOCIATIVITY h_call deserves
to be explicitly defined, for a better understanding of the code.
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
上级 52d99627
......@@ -1247,11 +1247,15 @@ static int update_cpu_associativity_changes_mask(void)
return cpumask_weight(changes);
}
/* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers.
*/
#define VPHN_REGISTER_COUNT 6
/*
* 6 64-bit registers unpacked into 12 32-bit associativity values. To form
* the complete property we have to add the length in the first cell.
*/
#define VPHN_ASSOC_BUFSIZE (6*sizeof(u64)/sizeof(u32) + 1)
#define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u32) + 1)
/*
* Convert the associativity domain numbers returned from the hypervisor
......@@ -1309,7 +1313,7 @@ static long hcall_vphn(unsigned long cpu, __be32 *associativity)
int i;
rc = plpar_hcall9(H_HOME_NODE_ASSOCIATIVITY, retbuf, flags, hwcpu);
for (i = 0; i < 6; i++)
for (i = 0; i < VPHN_REGISTER_COUNT; i++)
retbuf[i] = cpu_to_be64(retbuf[i]);
vphn_unpack_associativity(retbuf, associativity);
......
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