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arch/tile: parameterize system PLs to support KVM port

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While not a port to KVM (yet), this change modifies the kernel
to be able to build either at PL1 or at PL2 with a suitable
config switch.  Pushing up this change avoids handling branch
merge issues going forward with the KVM work.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2010-10-14 16:23:03 -04:00
parent bf65e440e8
commit a78c942df6
23 changed files with 337 additions and 131 deletions
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11
arch/tile/include/asm/processor.h
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@ -328,18 +328,21 @@ extern int kdata_huge;
* Note that assembly code assumes that USER_PL is zero.
*/
#define USER_PL 0
#define KERNEL_PL 1
#if CONFIG_KERNEL_PL == 2
#define GUEST_PL 1
#endif
#define KERNEL_PL CONFIG_KERNEL_PL
/* SYSTEM_SAVE_1_0 holds the current cpu number ORed with ksp0. */
/* SYSTEM_SAVE_K_0 holds the current cpu number ORed with ksp0. */
#define CPU_LOG_MASK_VALUE 12
#define CPU_MASK_VALUE ((1 << CPU_LOG_MASK_VALUE) - 1)
#if CONFIG_NR_CPUS > CPU_MASK_VALUE
# error Too many cpus!
#endif
#define raw_smp_processor_id() \
((int)__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & CPU_MASK_VALUE)
((int)__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & CPU_MASK_VALUE)
#define get_current_ksp0() \
(__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & ~CPU_MASK_VALUE)
(__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & ~CPU_MASK_VALUE)
#define next_current_ksp0(task) ({ \
unsigned long __ksp0 = task_ksp0(task); \
int __cpu = raw_smp_processor_id(); \