github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 23:22:31 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: pkvm: Add a generic synchronous exception injection primitive

Browse Source 
Similarly to the "classic" KVM code, pKVM doesn't have an "anything
goes" synchronous exception injection primitive.

Carve one out of the UNDEF injection code.

Link: https://patch.msgid.link/20260108173233.2911955-8-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2026-01-08 17:32:31 +00:00
parent 70a5ce4efc
commit e5d40a5a97
1 changed files with 15 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
arch/arm64/kvm/hyp/nvhe/sys_regs.c
View File

@ -243,16 +243,15 @@ static u64 pvm_calc_id_reg(const struct kvm_vcpu *vcpu, u32 id)
}
}
/*
* Inject an unknown/undefined exception to an AArch64 guest while most of its
* sysregs are live.
*/
static void inject_undef64(struct kvm_vcpu *vcpu)
static void inject_sync64(struct kvm_vcpu *vcpu, u64 esr)
{
u64 esr = (ESR_ELx_EC_UNKNOWN << ESR_ELx_EC_SHIFT);
*vcpu_pc(vcpu) = read_sysreg_el2(SYS_ELR);
*vcpu_cpsr(vcpu) = read_sysreg_el2(SYS_SPSR);
/*
* Make sure we have the latest update to VBAR_EL1, as pKVM
* handles traps very early, before sysregs are resync'ed
*/
__vcpu_assign_sys_reg(vcpu, VBAR_EL1, read_sysreg_el1(SYS_VBAR));
kvm_pend_exception(vcpu, EXCEPT_AA64_EL1_SYNC);
@ -265,6 +264,15 @@ static void inject_undef64(struct kvm_vcpu *vcpu)
write_sysreg_el2(*vcpu_cpsr(vcpu), SYS_SPSR);
}
/*
* Inject an unknown/undefined exception to an AArch64 guest while most of its
* sysregs are live.
*/
static void inject_undef64(struct kvm_vcpu *vcpu)
{
inject_sync64(vcpu, (ESR_ELx_EC_UNKNOWN << ESR_ELx_EC_SHIFT));
}
static u64 read_id_reg(const struct kvm_vcpu *vcpu,
struct sys_reg_desc const *r)
{