[PATCH] ppc64: Add VMX save flag to VPA
We need to indicate to the hypervisor that it needs to save our VMX
registers when switching partitions on a shared-processor system, just as
it needs to for FP and PMC registers.
This could be made to be on-demand when VMX is used, but we don't do that
for FP nor PMC right now either so let's not overcomplicate things.
Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Paul Mackerras <paulus@samba.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: <engebret@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/ppc64/kernel/pSeries_lpar.c b/arch/ppc64/kernel/pSeries_lpar.c
index 0a3ddc9..a1d5fdf 100644
--- a/arch/ppc64/kernel/pSeries_lpar.c
+++ b/arch/ppc64/kernel/pSeries_lpar.c
@@ -266,6 +266,10 @@
/* Register the Virtual Processor Area (VPA) */
flags = 1UL << (63 - 18);
+
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ paca[cpu].lppaca.vmxregs_in_use = 1;
+
ret = register_vpa(flags, hwcpu, __pa(vpa));
if (ret)
diff --git a/arch/ppc64/kernel/pacaData.c b/arch/ppc64/kernel/pacaData.c
index 6182a2c..33a2d8d 100644
--- a/arch/ppc64/kernel/pacaData.c
+++ b/arch/ppc64/kernel/pacaData.c
@@ -59,6 +59,7 @@
.fpregs_in_use = 1, \
.end_of_quantum = 0xfffffffffffffffful, \
.slb_count = 64, \
+ .vmxregs_in_use = 0, \
}, \
#ifdef CONFIG_PPC_ISERIES
diff --git a/include/asm-ppc64/lppaca.h b/include/asm-ppc64/lppaca.h
index 70766b5..9e2a6c0 100644
--- a/include/asm-ppc64/lppaca.h
+++ b/include/asm-ppc64/lppaca.h
@@ -108,7 +108,7 @@
volatile u32 virtual_decr; // Virtual DECR for shared procsx78-x7B
u16 slb_count; // # of SLBs to maintain x7C-x7D
u8 idle; // Indicate OS is idle x7E
- u8 reserved5; // Reserved x7F
+ u8 vmxregs_in_use; // VMX registers in use x7F
//=============================================================================