diff options
| author | Mostafa Saleh <smostafa@google.com> | 2026-06-03 11:05:22 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2026-07-21 22:27:47 +0000 |
| commit | e62decaf98e7c1385c4a22c61ba8bf94d24713a5 (patch) | |
| tree | 107182e94051846df0561ca6b670a4f9d6f31e17 /drivers/virt | |
| parent | 442d366cc1aabc699015a2e10a41bba17fe416ad (diff) | |
| download | linux-next-e62decaf98e7c1385c4a22c61ba8bf94d24713a5.tar.gz linux-next-e62decaf98e7c1385c4a22c61ba8bf94d24713a5.zip | |
arm64/coco: Add pKVM as a CC platform
pKVM does support memory encryption, expose that to the rest of
the kernel through cc_platform_has()
At the moment, all devices inside the guest are emulated which
requires its memory to be shared back to the host (decrypted), so
set force_dma_unencrypted() to always return true.
Although, typically pKVM guests rely on restricted-dma-pools to
bounce traffic, with this change, it is possible to solely rely on
the default SWIOTLB for that (assuming the appropriate size is set
from the command line)
Signed-off-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/virt')
| -rw-r--r-- | drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c b/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c index 4230b817a80b..6e966bad5ee1 100644 --- a/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c +++ b/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c @@ -17,6 +17,7 @@ #include <asm/hypervisor.h> static size_t pkvm_granule; +DEFINE_STATIC_KEY_FALSE_RO(pkvm_guest); static int arm_smccc_do_one_page(u32 func_id, phys_addr_t phys) { @@ -120,4 +121,6 @@ void pkvm_init_hyp_services(void) if (kvm_arm_hyp_service_available(ARM_SMCCC_KVM_FUNC_MMIO_GUARD)) arm64_ioremap_prot_hook_register(&mmio_guard_ioremap_hook); + + static_branch_enable(&pkvm_guest); } |