diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c index a8c1a698d588..9c92d42996cb 100644 --- a/arch/mips/kernel/smtc.c +++ b/arch/mips/kernel/smtc.c @@ -88,11 +88,19 @@ unsigned int smtc_status = 0; /* Boot command line configuration overrides */ +static int vpe0limit; static int ipibuffers = 0; static int nostlb = 0; static int asidmask = 0; unsigned long smtc_asid_mask = 0xff; +static int __init vpe0tcs(char *str) +{ + get_option(&str, &vpe0limit); + + return 1; +} + static int __init ipibufs(char *str) { get_option(&str, &ipibuffers); @@ -125,6 +133,7 @@ static int __init asidmask_set(char *str) return 1; } +__setup("vpe0tcs=", vpe0tcs); __setup("ipibufs=", ipibufs); __setup("nostlb", stlb_disable); __setup("asidmask=", asidmask_set); @@ -340,7 +349,7 @@ static void smtc_tc_setup(int vpe, int tc, int cpu) void mipsmt_prepare_cpus(void) { - int i, vpe, tc, ntc, nvpe, tcpervpe, slop, cpu; + int i, vpe, tc, ntc, nvpe, tcpervpe[NR_CPUS], slop, cpu; unsigned long flags; unsigned long val; int nipi; @@ -401,8 +410,39 @@ void mipsmt_prepare_cpus(void) ntc = NR_CPUS; if (tclimit > 0 && ntc > tclimit) ntc = tclimit; - tcpervpe = ntc / nvpe; - slop = ntc % nvpe; /* Residual TCs, < NVPE */ + slop = ntc % nvpe; + for (i = 0; i < nvpe; i++) { + tcpervpe[i] = ntc / nvpe; + if (slop) { + if((slop - i) > 0) tcpervpe[i]++; + } + } + /* Handle command line override for VPE0 */ + if (vpe0limit > ntc) vpe0limit = ntc; + if (vpe0limit > 0) { + int slopslop; + if (vpe0limit < tcpervpe[0]) { + /* Reducing TC count - distribute to others */ + slop = tcpervpe[0] - vpe0limit; + slopslop = slop % (nvpe - 1); + tcpervpe[0] = vpe0limit; + for (i = 1; i < nvpe; i++) { + tcpervpe[i] += slop / (nvpe - 1); + if(slopslop && ((slopslop - (i - 1) > 0))) + tcpervpe[i]++; + } + } else if (vpe0limit > tcpervpe[0]) { + /* Increasing TC count - steal from others */ + slop = vpe0limit - tcpervpe[0]; + slopslop = slop % (nvpe - 1); + tcpervpe[0] = vpe0limit; + for (i = 1; i < nvpe; i++) { + tcpervpe[i] -= slop / (nvpe - 1); + if(slopslop && ((slopslop - (i - 1) > 0))) + tcpervpe[i]--; + } + } + } /* Set up shared TLB */ smtc_configure_tlb(); @@ -416,7 +456,7 @@ void mipsmt_prepare_cpus(void) if (vpe != 0) printk(", "); printk("VPE %d: TC", vpe); - for (i = 0; i < tcpervpe; i++) { + for (i = 0; i < tcpervpe[vpe]; i++) { /* * TC 0 is bound to VPE 0 at reset, * and is presumably executing this @@ -429,15 +469,6 @@ void mipsmt_prepare_cpus(void) printk(" %d", tc); tc++; } - if (slop) { - if (tc != 0) { - smtc_tc_setup(vpe, tc, cpu); - cpu++; - } - printk(" %d", tc); - tc++; - slop--; - } if (vpe != 0) { /* * Clear any stale software interrupts from VPE's Cause