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Commit 233ccd0d authored Sep 03, 2005 by Olof Johansson Committed by Linus Torvalds Sep 05, 2005

[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>

parent b749bfcd

arch/ppc64/kernel/pSeries_lpar.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -266,6 +266,10 @@ void vpa_init(int cpu)

		/* 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)

arch/ppc64/kernel/pacaData.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -59,6 +59,7 @@ extern unsigned long __toc_start;
		.fpregs_in_use = 1, \
		.end_of_quantum = 0xfffffffffffffffful, \
		.slb_count = 64, \
		.vmxregs_in_use = 0, \
		}, \

		#ifdef CONFIG_PPC_ISERIES

include/asm-ppc64/lppaca.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -108,7 +108,7 @@ struct lppaca
		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


		//=============================================================================