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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-02-13 18:08:11 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-30 15:34:22 +0300 |
| commit | 8e0b634b132752ec3eba50afb952502b1a87d6ba (patch) | |
| tree | 870818dfb79d9b0900fa0458ffbee7a39091edac /arch/powerpc/kernel/paca.c | |
| parent | 0834d627fbea00c1444075eb3e448e1974da452d (diff) | |
| download | linux-8e0b634b132752ec3eba50afb952502b1a87d6ba.tar.xz | |
powerpc/64s: Do not allocate lppaca if we are not virtualized
The "lppaca" is a structure registered with the hypervisor. This is
unnecessary when running on non-virtualised platforms. One field from
the lppaca (pmcregs_in_use) is also used by the host, so move the host
part out into the paca (lppaca field is still updated in
guest mode).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Fix non-pseries build with some #ifdefs]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/paca.c')
| -rw-r--r-- | arch/powerpc/kernel/paca.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index 95ffedf14885..5900540e2ff8 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -20,7 +20,7 @@ #include "setup.h" -#ifdef CONFIG_PPC_BOOK3S +#ifdef CONFIG_PPC_PSERIES /* * The structure which the hypervisor knows about - this structure @@ -47,6 +47,9 @@ static long __initdata lppaca_size; static void __init allocate_lppacas(int nr_cpus, unsigned long limit) { + if (early_cpu_has_feature(CPU_FTR_HVMODE)) + return; + if (nr_cpus <= NR_LPPACAS) return; @@ -60,6 +63,9 @@ static struct lppaca * __init new_lppaca(int cpu) { struct lppaca *lp; + if (early_cpu_has_feature(CPU_FTR_HVMODE)) + return NULL; + if (cpu < NR_LPPACAS) return &lppaca[cpu]; @@ -73,6 +79,9 @@ static void __init free_lppacas(void) { long new_size = 0, nr; + if (early_cpu_has_feature(CPU_FTR_HVMODE)) + return; + if (!lppaca_size) return; nr = num_possible_cpus() - NR_LPPACAS; @@ -157,9 +166,10 @@ EXPORT_SYMBOL(paca); void __init initialise_paca(struct paca_struct *new_paca, int cpu) { -#ifdef CONFIG_PPC_BOOK3S +#ifdef CONFIG_PPC_PSERIES new_paca->lppaca_ptr = new_lppaca(cpu); -#else +#endif +#ifdef CONFIG_PPC_BOOK3E new_paca->kernel_pgd = swapper_pg_dir; #endif new_paca->lock_token = 0x8000; |