diff options
| author | Will Deacon <will@kernel.org> | 2024-08-30 16:01:49 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-08-30 18:30:41 +0300 |
| commit | 0f12694958001c96bda811473fdb23f333c6d3ca (patch) | |
| tree | 89427b8cf9699902c19ade73e40057f6bcaf7ce3 /include | |
| parent | c86fa3470c1026e9f63a93e8885ea51ef99fae35 (diff) | |
| download | linux-0f12694958001c96bda811473fdb23f333c6d3ca.tar.xz | |
drivers/virt: pkvm: Intercept ioremap using pKVM MMIO_GUARD hypercall
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 <maz@kernel.org>
Link: https://lore.kernel.org/r/20240830130150.8568-7-will@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/arm-smccc.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 9cb7c95920b0..e93c1f7cea70 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -118,6 +118,7 @@ #define ARM_SMCCC_KVM_FUNC_HYP_MEMINFO 2 #define ARM_SMCCC_KVM_FUNC_MEM_SHARE 3 #define ARM_SMCCC_KVM_FUNC_MEM_UNSHARE 4 +#define ARM_SMCCC_KVM_FUNC_MMIO_GUARD 7 #define ARM_SMCCC_KVM_FUNC_FEATURES_2 127 #define ARM_SMCCC_KVM_NUM_FUNCS 128 @@ -158,6 +159,12 @@ ARM_SMCCC_OWNER_VENDOR_HYP, \ ARM_SMCCC_KVM_FUNC_MEM_UNSHARE) +#define ARM_SMCCC_VENDOR_HYP_KVM_MMIO_GUARD_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + ARM_SMCCC_KVM_FUNC_MMIO_GUARD) + /* ptp_kvm counter type ID */ #define KVM_PTP_VIRT_COUNTER 0 #define KVM_PTP_PHYS_COUNTER 1 |