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[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>
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3 changed files with 6 additions and 1 deletions
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@ -266,6 +266,10 @@ void vpa_init(int cpu)
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/* Register the Virtual Processor Area (VPA) */
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flags = 1UL << (63 - 18);
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if (cpu_has_feature(CPU_FTR_ALTIVEC))
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paca[cpu].lppaca.vmxregs_in_use = 1;
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ret = register_vpa(flags, hwcpu, __pa(vpa));
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if (ret)
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@ -59,6 +59,7 @@ extern unsigned long __toc_start;
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.fpregs_in_use = 1, \
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.end_of_quantum = 0xfffffffffffffffful, \
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.slb_count = 64, \
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.vmxregs_in_use = 0, \
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}, \
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#ifdef CONFIG_PPC_ISERIES
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@ -108,7 +108,7 @@ struct lppaca
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volatile u32 virtual_decr; // Virtual DECR for shared procsx78-x7B
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u16 slb_count; // # of SLBs to maintain x7C-x7D
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u8 idle; // Indicate OS is idle x7E
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u8 reserved5; // Reserved x7F
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u8 vmxregs_in_use; // VMX registers in use x7F
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//=============================================================================
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