FAILED: patch "[PATCH] arm64: KVM: Trap VM ops when" failed to apply to 4.19-stable tree

The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From d3ec3a08fa700c8b46abb137dce4e2514a6f9668 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <[email protected]>
Date: Thu, 7 Feb 2019 16:01:21 +0000
Subject: [PATCH] arm64: KVM: Trap VM ops when
ARM64_WORKAROUND_CAVIUM_TX2_219_TVM is set

In order to workaround the TX2-219 erratum, it is necessary to trap TTBRx_EL1 accesses to EL2. This is done by setting HCR_EL2.TVM on guest entry, which has the side effect of trapping all the other VM-related sysregs as well.

To minimize the overhead, a fast path is used so that we don't have to go all the way back to the main sysreg handling code, unless the rest of the hypervisor expects to see these accesses.

index f19fe4b9acc4..e81e0cbd728f 100644
@@ -52,7 +52,8 @@
 #define ARM64_HAS_IRQ_PRIO_MASKING		42
 #define ARM64_HAS_DCPODP			43
 #define ARM64_WORKAROUND_1463225		44
+#define ARM64_WORKAROUND_CAVIUM_TX2_219_TVM	45
 
-#define ARM64_NCAPS				45
+#define ARM64_NCAPS				46
 
 #endif /* __ASM_CPUCAPS_H */