diff options
| author | Michael Ellerman <michael@ellerman.id.au> | 2013-06-28 10:15:18 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-07-01 03:50:17 +0200 |
| commit | 6e0b8bc965d25a8e0701eaca3fca5941b4f4b2b2 (patch) | |
| tree | b4daf46d3650fdc5a479d6fe5bc8486842551fc1 /arch/powerpc | |
| parent | powerpc/perf: Add power8 EBB support (diff) | |
| download | linux-6e0b8bc965d25a8e0701eaca3fca5941b4f4b2b2.tar.xz linux-6e0b8bc965d25a8e0701eaca3fca5941b4f4b2b2.zip | |
powerpc/pseries: Inform the hypervisor we are using EBB regs
On LPAR systems we need to inform the hypervisor that we are using the
EBB registers. We do this by setting a bit in the Virtual Processor Area
(VPA) - formerly known as the lppaca.
For now we do this always, ie. we do not dynamically enable/disable.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/lppaca.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/lpar.c | 3 |
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h index b1e7f2af1016..9b12f88d4adb 100644 --- a/arch/powerpc/include/asm/lppaca.h +++ b/arch/powerpc/include/asm/lppaca.h @@ -66,7 +66,8 @@ struct lppaca { u8 reserved6[48]; u8 cede_latency_hint; - u8 reserved7[7]; + u8 ebb_regs_in_use; + u8 reserved7[6]; u8 dtl_enable_mask; /* Dispatch Trace Log mask */ u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */ u8 fpregs_in_use; diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index fd0f2f2a9b90..02d6e21619bb 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -71,6 +71,9 @@ void vpa_init(int cpu) if (cpu_has_feature(CPU_FTR_ALTIVEC)) lppaca_of(cpu).vmxregs_in_use = 1; + if (cpu_has_feature(CPU_FTR_ARCH_207S)) + lppaca_of(cpu).ebb_regs_in_use = 1; + addr = __pa(&lppaca_of(cpu)); ret = register_vpa(hwcpu, addr); |