diff options
| author | Will Deacon <will@kernel.org> | 2023-05-23 13:18:20 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-06-02 00:34:50 +0300 |
| commit | bc3888a0f4e979ecf9dd8c33a84b8da8cc130790 (patch) | |
| tree | 8e82812248a4ce48682e680402ecc8b85454ae7f /arch/arm64/include/asm/kvm_pkvm.h | |
| parent | 12bdce4f41197a1a97ba1c711f77d557841e13d9 (diff) | |
| download | linux-bc3888a0f4e979ecf9dd8c33a84b8da8cc130790.tar.xz | |
KVM: arm64: Allocate pages for hypervisor FF-A mailboxes
The FF-A proxy code needs to allocate its own buffer pair for
communication with EL3 and for forwarding calls from the host at EL1.
Reserve a couple of pages for this purpose and use them to initialise
the hypervisor's FF-A buffer structure.
Co-developed-by: Andrew Walbran <qwandor@google.com>
Signed-off-by: Andrew Walbran <qwandor@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20230523101828.7328-4-will@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/include/asm/kvm_pkvm.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_pkvm.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_pkvm.h b/arch/arm64/include/asm/kvm_pkvm.h index 01129b0d4c68..2b495ec59deb 100644 --- a/arch/arm64/include/asm/kvm_pkvm.h +++ b/arch/arm64/include/asm/kvm_pkvm.h @@ -106,4 +106,12 @@ static inline unsigned long host_s2_pgtable_pages(void) return res; } +#define KVM_FFA_MBOX_NR_PAGES 1 + +static inline unsigned long hyp_ffa_proxy_pages(void) +{ + /* A page each for the hypervisor's RX and TX mailboxes. */ + return 2 * KVM_FFA_MBOX_NR_PAGES; +} + #endif /* __ARM64_KVM_PKVM_H__ */ |