diff options
Diffstat (limited to 'arch/powerpc/kernel/paca.c')
| -rw-r--r-- | arch/powerpc/kernel/paca.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index 999bdd816769..5d1b708086bd 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -25,6 +25,28 @@ * field correctly */ extern unsigned long __toc_start; +/* + * iSeries structure which the hypervisor knows about - this structure + * should not cross a page boundary. The vpa_init/register_vpa call + * is now known to fail if the lppaca structure crosses a page + * boundary. The lppaca is also used on POWER5 pSeries boxes. The + * lppaca is 640 bytes long, and cannot readily change since the + * hypervisor knows its layout, so a 1kB alignment will suffice to + * ensure that it doesn't cross a page boundary. + */ +struct lppaca lppaca[] = { + [0 ... (NR_CPUS-1)] = { + .desc = 0xd397d781, /* "LpPa" */ + .size = sizeof(struct lppaca), + .dyn_proc_status = 2, + .decr_val = 0x00ff0000, + .fpregs_in_use = 1, + .end_of_quantum = 0xfffffffffffffffful, + .slb_count = 64, + .vmxregs_in_use = 0, + }, +}; + /* The Paca is an array with one entry per processor. Each contains an * lppaca, which contains the information shared between the * hypervisor and Linux. @@ -35,27 +57,17 @@ extern unsigned long __toc_start; * processor (not thread). */ #define PACA_INIT_COMMON(number, start, asrr, asrv) \ + .lppaca_ptr = &lppaca[number], \ .lock_token = 0x8000, \ .paca_index = (number), /* Paca Index */ \ .kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL, \ .stab_real = (asrr), /* Real pointer to segment table */ \ .stab_addr = (asrv), /* Virt pointer to segment table */ \ .cpu_start = (start), /* Processor start */ \ - .hw_cpu_id = 0xffff, \ - .lppaca = { \ - .desc = 0xd397d781, /* "LpPa" */ \ - .size = sizeof(struct lppaca), \ - .dyn_proc_status = 2, \ - .decr_val = 0x00ff0000, \ - .fpregs_in_use = 1, \ - .end_of_quantum = 0xfffffffffffffffful, \ - .slb_count = 64, \ - .vmxregs_in_use = 0, \ - }, \ + .hw_cpu_id = 0xffff, #ifdef CONFIG_PPC_ISERIES #define PACA_INIT_ISERIES(number) \ - .lppaca_ptr = &paca[number].lppaca, \ .reg_save_ptr = &iseries_reg_save[number], #define PACA_INIT(number) \ |