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| author | Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> | 2025-02-21 14:02:26 +0000 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2025-02-26 13:30:36 -0800 |
| commit | c0000e58c74eed0702b8271e8475378c3c17cf0f (patch) | |
| tree | 157cf37710f44704362a15a6201c2bdcd0fe005d /Documentation/virt | |
| parent | 57e5cc9b8a399f85c95b6249ecb423553aad209c (diff) | |
| download | ath-c0000e58c74eed0702b8271e8475378c3c17cf0f.tar.gz | |
KVM: arm64: Introduce KVM_REG_ARM_VENDOR_HYP_BMAP_2
The vendor_hyp_bmap bitmap holds the information about the Vendor Hyp
services available to the user space and can be get/set using
{G, S}ET_ONE_REG interfaces. This is done using the pseudo-firmware
bitmap register KVM_REG_ARM_VENDOR_HYP_BMAP.
At present, this bitmap is a 64 bit one and since the function numbers
for newly added DISCOVER_IPML_* hypercalls are 64-65, introduce
another pseudo-firmware bitmap register KVM_REG_ARM_VENDOR_HYP_BMAP_2.
Reviewed-by: Sebastian Ott <sebott@redhat.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250221140229.12588-4-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/arm/fw-pseudo-registers.rst | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/Documentation/virt/kvm/arm/fw-pseudo-registers.rst b/Documentation/virt/kvm/arm/fw-pseudo-registers.rst index b90fd0b0fa666..d78b53b05dfcf 100644 --- a/Documentation/virt/kvm/arm/fw-pseudo-registers.rst +++ b/Documentation/virt/kvm/arm/fw-pseudo-registers.rst @@ -116,7 +116,7 @@ The pseudo-firmware bitmap register are as follows: ARM DEN0057A. * KVM_REG_ARM_VENDOR_HYP_BMAP: - Controls the bitmap of the Vendor specific Hypervisor Service Calls. + Controls the bitmap of the Vendor specific Hypervisor Service Calls[0-63]. The following bits are accepted: @@ -127,6 +127,19 @@ The pseudo-firmware bitmap register are as follows: Bit-1: KVM_REG_ARM_VENDOR_HYP_BIT_PTP: The bit represents the Precision Time Protocol KVM service. +* KVM_REG_ARM_VENDOR_HYP_BMAP_2: + Controls the bitmap of the Vendor specific Hypervisor Service Calls[64-127]. + + The following bits are accepted: + + Bit-0: KVM_REG_ARM_VENDOR_HYP_BIT_DISCOVER_IMPL_VER + This represents the ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_VER_FUNC_ID + function-id. This is reset to 0. + + Bit-1: KVM_REG_ARM_VENDOR_HYP_BIT_DISCOVER_IMPL_CPUS + This represents the ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_CPUS_FUNC_ID + function-id. This is reset to 0. + Errors: ======= ============================================================= |