superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

KVM: arm64: nv: Drop EL12 register traps that are redirected to VNCR 

With FEAT_NV2, a bunch of system register writes are turned into
memory writes. This is specially the fate of the EL12 registers
that the guest hypervisor manipulates out of context.

Remove the trap descriptors for those, as they are never going
to be used again.

Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
pull/477/merge
Marc Zyngier 2023-11-08 19:10:12 +00:00
parent 3ed0b5123c
commit 4d4f52052b
1 changed files with 0 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/arm64/kvm/sys_regs.c
View File

@ -2566,21 +2566,6 @@ static const struct sys_reg_desc sys_reg_descs[] = {
EL2_REG(CNTVOFF_EL2, access_rw, reset_val, 0),
EL2_REG(CNTHCTL_EL2, access_rw, reset_val, 0),
EL12_REG(SCTLR, access_vm_reg, reset_val, 0x00C50078),
EL12_REG(CPACR, access_rw, reset_val, 0),
EL12_REG(TTBR0, access_vm_reg, reset_unknown, 0),
EL12_REG(TTBR1, access_vm_reg, reset_unknown, 0),
EL12_REG(TCR, access_vm_reg, reset_val, 0),
{ SYS_DESC(SYS_SPSR_EL12), access_spsr},
{ SYS_DESC(SYS_ELR_EL12), access_elr},
EL12_REG(AFSR0, access_vm_reg, reset_unknown, 0),
EL12_REG(AFSR1, access_vm_reg, reset_unknown, 0),
EL12_REG(ESR, access_vm_reg, reset_unknown, 0),
EL12_REG(FAR, access_vm_reg, reset_unknown, 0),
EL12_REG(MAIR, access_vm_reg, reset_unknown, 0),
EL12_REG(AMAIR, access_vm_reg, reset_amair_el1, 0),
EL12_REG(VBAR, access_rw, reset_val, 0),
EL12_REG(CONTEXTIDR, access_vm_reg, reset_val, 0),
EL12_REG(CNTKCTL, access_rw, reset_val, 0),
EL2_REG(SP_EL2, NULL, reset_unknown, 0),