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Will Deacon 2459a0b149 drivers/virt: pkvm: Don't fail ioremap() call if MMIO_GUARD fails

[ Upstream commit d44679fb95 ]

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: 0f12694958 ("drivers/virt: pkvm: Intercept ioremap using pKVM MMIO_GUARD hypercall")
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20241202145731.6422-2-will@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-12-14 20:03:17 +01:00

acrn

Merge tag 'pull-stable-struct_fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2024-09-23 09:35:36 -07:00

coco

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

2024-12-14 20:03:17 +01:00

nitro_enclaves

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vboxguest

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fsl_hypervisor.c