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Revert "FROMLIST: KVM: arm64: Expose unshare hypercall to the host"

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This reverts commit fee11d0f41.

This will be replaced by a FROMGIT patch shortly.

Signed-off-by: Quentin Perret <qperret@google.com>
Change-Id: I4b61e149f82874557904f6e6b09421f294f996fe
This commit is contained in:
Quentin Perret
2022-01-06 11:08:32 +00:00
committed by Will Deacon
parent 5214f6c1c4
commit 870805293f
4 changed files with 0 additions and 43 deletions
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1
arch/arm64/include/asm/kvm_asm.h
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@@ -62,7 +62,6 @@ enum __kvm_host_smccc_func {
/* Hypercalls available after pKVM finalisation */
__KVM_HOST_SMCCC_FUNC___pkvm_host_share_hyp,
__KVM_HOST_SMCCC_FUNC___pkvm_host_unshare_hyp,
__KVM_HOST_SMCCC_FUNC___kvm_adjust_pc,
__KVM_HOST_SMCCC_FUNC___kvm_vcpu_run,
__KVM_HOST_SMCCC_FUNC___kvm_flush_vm_context,

1
arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
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@@ -55,7 +55,6 @@ extern const u8 pkvm_hyp_id;
int __pkvm_prot_finalize(void);
int __pkvm_host_share_hyp(u64 pfn);
int __pkvm_host_unshare_hyp(u64 pfn);
bool addr_is_memory(phys_addr_t phys);
int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_prot prot);

8
arch/arm64/kvm/hyp/nvhe/hyp-main.c
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@@ -150,13 +150,6 @@ static void handle___pkvm_host_share_hyp(struct kvm_cpu_context *host_ctxt)
cpu_reg(host_ctxt, 1) = __pkvm_host_share_hyp(pfn);
}
static void handle___pkvm_host_unshare_hyp(struct kvm_cpu_context *host_ctxt)
{
DECLARE_REG(u64, pfn, host_ctxt, 1);
cpu_reg(host_ctxt, 1) = __pkvm_host_unshare_hyp(pfn);
}
static void handle___pkvm_create_private_mapping(struct kvm_cpu_context *host_ctxt)
{
DECLARE_REG(phys_addr_t, phys, host_ctxt, 1);
@@ -194,7 +187,6 @@ static const hcall_t host_hcall[] = {
HANDLE_FUNC(__pkvm_prot_finalize),
HANDLE_FUNC(__pkvm_host_share_hyp),
HANDLE_FUNC(__pkvm_host_unshare_hyp),
HANDLE_FUNC(__kvm_adjust_pc),
HANDLE_FUNC(__kvm_vcpu_run),
HANDLE_FUNC(__kvm_flush_vm_context),

33
arch/arm64/kvm/hyp/nvhe/mem_protect.c
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@@ -821,36 +821,3 @@ int __pkvm_host_share_hyp(u64 pfn)
return ret;
}
int __pkvm_host_unshare_hyp(u64 pfn)
{
int ret;
u64 host_addr = hyp_pfn_to_phys(pfn);
u64 hyp_addr = (u64)__hyp_va(host_addr);
struct pkvm_mem_share share = {
.tx = {
.nr_pages = 1,
.initiator = {
.id = PKVM_ID_HOST,
.addr = host_addr,
.host = {
.completer_addr = hyp_addr,
},
},
.completer = {
.id = PKVM_ID_HYP,
},
},
.prot = PAGE_HYP,
};
host_lock_component();
hyp_lock_component();
ret = do_unshare(&share);
hyp_unlock_component();
host_unlock_component();
return ret;
}