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| author | Paul Mackerras <paulus@ozlabs.org> | 2019-05-13 06:03:49 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2019-05-14 05:05:24 +0300 |
| commit | 2eeeaf16aa6f30c349251da4a1b09be24d92411f (patch) | |
| tree | 97f752446c5020c5c415173642b7aed44637f42d /arch | |
| parent | 0caecf5b00199636eb2d32201199ecd6be52558d (diff) | |
| download | linux-2eeeaf16aa6f30c349251da4a1b09be24d92411f.tar.xz | |
KVM: PPC: Book3S HV: Make sure to load LPID for radix VCPUs
Commit 70ea13f6e609 ("KVM: PPC: Book3S HV: Flush TLB on secondary radix
threads", 2019-04-29) aimed to make radix guests that are using the
real-mode entry path load the LPID register and flush the TLB in the
same place where those things are done for HPT guests. However, it
omitted to remove a branch which branches around that code for radix
guests. The result is that with indep_thread_mode = N, radix guests
don't run correctly. (With indep_threads_mode = Y, which is the
default, radix guests use a different entry path.)
This removes the offending branch, and also the load and compare that
the branch depends on, since the cr7 setting is now unused.
Reported-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Tested-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Fixes: 70ea13f6e609 ("KVM: PPC: Book3S HV: Flush TLB on secondary radix threads")
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index ad1fc0194476..ad7bee97de77 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -581,11 +581,8 @@ kvmppc_hv_entry: 1: #endif - /* Use cr7 as an indication of radix mode */ ld r5, HSTATE_KVM_VCORE(r13) ld r9, VCORE_KVM(r5) /* pointer to struct kvm */ - lbz r0, KVM_RADIX(r9) - cmpwi cr7, r0, 0 /* * POWER7/POWER8 host -> guest partition switch code. @@ -608,9 +605,6 @@ kvmppc_hv_entry: cmpwi r6,0 bne 10f - /* Radix has already switched LPID and flushed core TLB */ - bne cr7, 22f - lwz r7,KVM_LPID(r9) BEGIN_FTR_SECTION ld r6,KVM_SDR1(r9) |