diff options
| author | Marc Zyngier <maz@kernel.org> | 2024-02-14 16:18:15 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-02-19 20:13:01 +0300 |
| commit | 19f3e7ea29f8f485f06b47f7c38f9e9e81013ada (patch) | |
| tree | bcd376abcdae27bc1cf9228641eba4dd74b6e24e /arch/arm64/kvm/sys_regs.c | |
| parent | 7fd498f473f121db10997d720628423e6538f3b7 (diff) | |
| download | linux-19f3e7ea29f8f485f06b47f7c38f9e9e81013ada.tar.xz | |
KVM: arm64: Register AArch64 system register entries with the sysreg xarray
In order to reduce the number of lookups that we have to perform
when handling a sysreg, register each AArch64 sysreg descriptor
with the global xarray. The index of the descriptor is stored
as a 10 bit field in the data word.
Subsequent patches will retrieve and use the stored index.
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240214131827.2856277-15-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/sys_regs.c')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 57f3d0c53fc3..a410e99f827e 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3972,6 +3972,7 @@ int __init kvm_sys_reg_table_init(void) struct sys_reg_params params; bool valid = true; unsigned int i; + int ret = 0; /* Make sure tables are unique and in order. */ valid &= check_sysreg_table(sys_reg_descs, ARRAY_SIZE(sys_reg_descs), false); @@ -3995,5 +3996,13 @@ int __init kvm_sys_reg_table_init(void) if (!first_idreg) return -EINVAL; - return populate_nv_trap_config(); + ret = populate_nv_trap_config(); + + for (i = 0; !ret && i < ARRAY_SIZE(sys_reg_descs); i++) + ret = populate_sysreg_config(sys_reg_descs + i, i); + + for (i = 0; !ret && i < ARRAY_SIZE(sys_insn_descs); i++) + ret = populate_sysreg_config(sys_insn_descs + i, i); + + return ret; } |