BACKPORT: FROMGIT: KVM: arm64: Handle AIDR_EL1 and REVIDR_EL1 in host for protected VMs

A guest kernel running as a protected VM will fail to boot because it
attempts to access the AIDR_EL1 register. Since commit 17efc1acee62
("arm64: Expose AIDR_EL1 via sysfs"), upstream kernels read this
register during early boot.

Similar to MIDR_EL1, which is handled by the host for protected VMs, let
the host handle AIDR_EL1 as well as REVIDR_EL1. However, unlike
MIDR_EL1, AIDR_EL1 and REVIDR_EL1 are trapped by HCR_EL2.TID1.
Therefore, we need to explicitly mark them as handled by the host in hyp
for protected VMs, since pKVM always sets TID1, because it still need to
trap access to SMIDR_EL1.

Bug: 435160610
(cherry picked from commit eaa43934b412f0381598e308b6a25d6c9a5dce2d
 https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git fixes)
Signed-off-by: Fuad Tabba <[email protected]>
[tabba@ changed SYS_REVIDR_EL1 to HOST_HANDLED)
Change-Id: If162571e53ea4f0d68376e887436e2acbe7c3d25

Author: Fuad Tabba

arch/arm64/kvm/hyp/nvhe/sys_regs.c

@@ -355,7 +355,7 @@ static const struct sys_reg_desc pvm_sys_reg_descs[] = {
 	RAZ_WI(SYS_OSDLR_EL1),
 
 	/* Group 1 ID registers */
-	RAZ_WI(SYS_REVIDR_EL1),
+	HOST_HANDLED(SYS_REVIDR_EL1),
 
 	/* AArch64 mappings of the AArch32 ID registers */
 	/* CRm=1 */
@@ -445,6 +445,7 @@ static const struct sys_reg_desc pvm_sys_reg_descs[] = {
 
 	HOST_HANDLED(SYS_CCSIDR_EL1),
 	HOST_HANDLED(SYS_CLIDR_EL1),
+	HOST_HANDLED(SYS_AIDR_EL1),
 	HOST_HANDLED(SYS_CSSELR_EL1),
 	HOST_HANDLED(SYS_CTR_EL0),