@@ -316,12 +316,11 @@ int __init kvm_set_ipa_limit(void)
parange = cpuid_feature_extract_unsigned_field(mmfr0,
ID_AA64MMFR0_EL1_PARANGE_SHIFT);
/*
- * IPA size beyond 48 bits could not be supported
- * on either 4K or 16K page size. Hence let's cap
- * it to 48 bits, in case it's reported as larger
- * on the system.
+ * IPA size beyond 48 bits for 4K and 16K page size is only supported
+ * when LPA2 is available. So if we have LPA2, enable it, else cap to 48
+ * bits, in case it's reported as larger on the system.
*/
- if (PAGE_SIZE != SZ_64K)
+ if (!system_supports_lpa2() && PAGE_SIZE != SZ_64K)
parange = min(parange, (unsigned int)ID_AA64MMFR0_EL1_PARANGE_48);
/*
With all the page-table infrastructure in place, we can finally increase the maximum permisable IPA size to 52-bits on 4KB and 16KB page systems that have FEAT_LPA2. Signed-off-by: Ryan Roberts <ryan.roberts@arm.com> --- arch/arm64/kvm/reset.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)