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authorAlexander Graf <agraf@suse.de>2014-05-15 14:38:03 +0200
committerAlexander Graf <agraf@suse.de>2014-05-30 14:26:30 +0200
commitd8d164a9850d486cc48081c18831680254688d0f (patch)
tree6c8d77919d3f2c0ce26f448c148be55cbf2c0bfa /arch/powerpc/mm/slb.c
parent207438d4e21e05728a8a58b5e25b0f6553260068 (diff)
KVM: PPC: Book3S PR: Rework SLB switching code
On LPAR guest systems Linux enables the shadow SLB to indicate to the hypervisor a number of SLB entries that always have to be available. Today we go through this shadow SLB and disable all ESID's valid bits. However, pHyp doesn't like this approach very much and honors us with fancy machine checks. Fortunately the shadow SLB descriptor also has an entry that indicates the number of valid entries following. During the lifetime of a guest we can just swap that value to 0 and don't have to worry about the SLB restoration magic. While we're touching the code, let's also make it more readable (get rid of rldicl), allow it to deal with a dynamic number of bolted SLB entries and only do shadow SLB swizzling on LPAR systems. Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/mm/slb.c')
-rw-r--r--arch/powerpc/mm/slb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index 9d1d33cd2be5..964a5f61488a 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -97,7 +97,7 @@ static inline void create_shadowed_slbe(unsigned long ea, int ssize,
static void __slb_flush_and_rebolt(void)
{
/* If you change this make sure you change SLB_NUM_BOLTED
- * appropriately too. */
+ * and PR KVM appropriately too. */
unsigned long linear_llp, vmalloc_llp, lflags, vflags;
unsigned long ksp_esid_data, ksp_vsid_data;