On Tue, Apr 23, 2019 at 10:27:26AM +0100, Suzuki K Poulose wrote:
Hi Sasha, On 04/22/2019 08:40 PM, Sasha Levin wrote:From: Suzuki K Poulose <suzuki.poulose@xxxxxxx> [ Upstream commit a80868f398554842b14d07060012c06efb57c456 ] commit 6794ad5443a2118 ("KVM: arm/arm64: Fix unintended stage 2 PMD mappings") made the checks to skip huge mappings, stricter. However it introduced a bug where we still use huge mappings, ignoring the flag to use PTE mappings, by not reseting the vma_pagesize to PAGE_SIZE. Also, the checks do not cover the PUD huge pages, that was under review during the same period. This patch fixes both the issues. Fixes : 6794ad5443a2118 ("KVM: arm/arm64: Fix unintended stage 2 PMD mappings") Reported-by: Zenghui Yu <yuzenghui@xxxxxxxxxx> Cc: Zenghui Yu <yuzenghui@xxxxxxxxxx> Cc: Christoffer Dall <christoffer.dall@xxxxxxx> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> Signed-off-by: Sasha Levin (Microsoft) <sashal@xxxxxxxxxx>Please be aware that we need a follow up fix for this patch to fix the problem for THP backed memory. http://lists.infradead.org/pipermail/linux-arm-kernel/2019-April/645324.html It should appear upstream soon.
Since it's not upstream yet, I'll drop this patch for now and queue it for a later release. -- Thanks, Sasha
