kernel/drivers/virt/coco/pkvm-guest, branch linux-rolling-stable

drivers/virt: pkvm: Don't fail ioremap() call if MMIO_GUARD fails

2024-12-14T19:03:17Z

[ Upstream commit d44679fb954ffea961036ed1aeb7d65035f78489 ] Calling the MMIO_GUARD hypercall from guests which have not been enrolled (e.g. because they are running without pvmfw) results in -EINVAL being returned. In this case, MMIO_GUARD is not active and so we can simply proceed with the normal ioremap() routine. Don't fail ioremap() if MMIO_GUARD fails; instead WARN_ON_ONCE() to highlight that the pvm environment is slightly wonky. Fixes: 0f1269495800 ("drivers/virt: pkvm: Intercept ioremap using pKVM MMIO_GUARD hypercall") Signed-off-by: Will Deacon Link: https://lore.kernel.org/r/20241202145731.6422-2-will@kernel.org Signed-off-by: Catalin Marinas Signed-off-by: Sasha Levin

drivers/virt: pkvm: Intercept ioremap using pKVM MMIO_GUARD hypercall

2024-08-30T15:30:41Z

Hook up pKVM's MMIO_GUARD hypercall so that ioremap() and friends will register the target physical address as MMIO with the hypervisor, allowing guest exits to that page to be emulated by the host with full syndrome information. Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20240830130150.8568-7-will@kernel.org Signed-off-by: Will Deacon

drivers/virt: pkvm: Hook up mem_encrypt API using pKVM hypercalls

2024-08-30T15:30:41Z

If we detect the presence of pKVM's SHARE and UNSHARE hypercalls, then register a backend implementation of the mem_encrypt API so that things like DMA buffers can be shared appropriately with the host. Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20240830130150.8568-5-will@kernel.org Signed-off-by: Will Deacon

drivers/virt: pkvm: Add initial support for running as a protected guest

2024-08-30T15:30:41Z

Implement a pKVM protected guest driver to probe the presence of pKVM and determine the memory protection granule using the HYP_MEMINFO hypercall. Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20240830130150.8568-3-will@kernel.org Signed-off-by: Will Deacon