diff options
| author | Kalesh Singh <kaleshsingh@google.com> | 2022-04-20 14:42:54 -0700 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-04-28 20:53:13 +0100 |
| commit | ce3354318a57875dc59f4bb841662e95bfba03db (patch) | |
| tree | 5b9676a2923ce4b733a1536df84eacd6ea2e2600 /arch/arm64/include/asm/kvm_asm.h | |
| parent | f922c13e778d6d5343d4576be785a8204c595113 (diff) | |
| download | linux-ce3354318a57875dc59f4bb841662e95bfba03db.tar.bz2 | |
KVM: arm64: Add guard pages for KVM nVHE hypervisor stack
Map the stack pages in the flexible private VA range and allocate
guard pages below the stack as unbacked VA space. The stack is aligned
so that any valid stack address has PAGE_SHIFT bit as 1 - this is used
for overflow detection (implemented in a subsequent patch in the series).
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220420214317.3303360-4-kaleshsingh@google.com
Diffstat (limited to 'arch/arm64/include/asm/kvm_asm.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_asm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index d5b0386ef765..2e277f2ed671 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -169,6 +169,7 @@ struct kvm_nvhe_init_params { unsigned long tcr_el2; unsigned long tpidr_el2; unsigned long stack_hyp_va; + unsigned long stack_pa; phys_addr_t pgd_pa; unsigned long hcr_el2; unsigned long vttbr; |