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Merge branch 'topic/ppc-kvm' into next

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Merge our ppc-kvm topic branch to bring in the Ultravisor support
patches.
This commit is contained in:
Michael Ellerman
2019-08-30 09:52:57 +10:00
parent 07aa1e786d 68e0aa8ec5
commit 9044adca78
29 changed files with 1564 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
arch/powerpc/kvm/book3s_64_vio.c
View File

@@ -416,7 +416,7 @@ static void kvmppc_clear_tce(struct mm_struct *mm, struct iommu_table *tbl,
unsigned long hpa = 0;
enum dma_data_direction dir = DMA_NONE;
iommu_tce_xchg(mm, tbl, entry, &hpa, &dir);
iommu_tce_xchg_no_kill(mm, tbl, entry, &hpa, &dir);
}
static long kvmppc_tce_iommu_mapped_dec(struct kvm *kvm,
@@ -447,7 +447,8 @@ static long kvmppc_tce_iommu_do_unmap(struct kvm *kvm,
unsigned long hpa = 0;
long ret;
if (WARN_ON_ONCE(iommu_tce_xchg(kvm->mm, tbl, entry, &hpa, &dir)))
if (WARN_ON_ONCE(iommu_tce_xchg_no_kill(kvm->mm, tbl, entry, &hpa,
&dir)))
return H_TOO_HARD;
if (dir == DMA_NONE)
@@ -455,7 +456,7 @@ static long kvmppc_tce_iommu_do_unmap(struct kvm *kvm,
ret = kvmppc_tce_iommu_mapped_dec(kvm, tbl, entry);
if (ret != H_SUCCESS)
iommu_tce_xchg(kvm->mm, tbl, entry, &hpa, &dir);
iommu_tce_xchg_no_kill(kvm->mm, tbl, entry, &hpa, &dir);
return ret;
}
@@ -501,7 +502,7 @@ long kvmppc_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
if (mm_iommu_mapped_inc(mem))
return H_TOO_HARD;
ret = iommu_tce_xchg(kvm->mm, tbl, entry, &hpa, &dir);
ret = iommu_tce_xchg_no_kill(kvm->mm, tbl, entry, &hpa, &dir);
if (WARN_ON_ONCE(ret)) {
mm_iommu_mapped_dec(mem);
return H_TOO_HARD;
@@ -579,6 +580,8 @@ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
ret = kvmppc_tce_iommu_map(vcpu->kvm, stt, stit->tbl,
entry, ua, dir);
iommu_tce_kill(stit->tbl, entry, 1);
if (ret != H_SUCCESS) {
kvmppc_clear_tce(vcpu->kvm->mm, stit->tbl, entry);
goto unlock_exit;
@@ -656,12 +659,14 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
*/
if (get_user(tce, tces + i)) {
ret = H_TOO_HARD;
goto unlock_exit;
goto invalidate_exit;
}
tce = be64_to_cpu(tce);
if (kvmppc_tce_to_ua(vcpu->kvm, tce, &ua))
return H_PARAMETER;
if (kvmppc_tce_to_ua(vcpu->kvm, tce, &ua)) {
ret = H_PARAMETER;
goto invalidate_exit;
}
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) {
ret = kvmppc_tce_iommu_map(vcpu->kvm, stt,
@@ -671,13 +676,17 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
if (ret != H_SUCCESS) {
kvmppc_clear_tce(vcpu->kvm->mm, stit->tbl,
entry);
goto unlock_exit;
goto invalidate_exit;
}
}
kvmppc_tce_put(stt, entry + i, tce);
}
invalidate_exit:
list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
iommu_tce_kill(stit->tbl, entry, npages);
unlock_exit:
srcu_read_unlock(&vcpu->kvm->srcu, idx);
@@ -716,7 +725,7 @@ long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
continue;
if (ret == H_TOO_HARD)
return ret;
goto invalidate_exit;
WARN_ON_ONCE(1);
kvmppc_clear_tce(vcpu->kvm->mm, stit->tbl, entry);
@@ -726,6 +735,10 @@ long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
for (i = 0; i < npages; ++i, ioba += (1ULL << stt->page_shift))
kvmppc_tce_put(stt, ioba >> stt->page_shift, tce_value);
return H_SUCCESS;
invalidate_exit:
list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
iommu_tce_kill(stit->tbl, ioba >> stt->page_shift, npages);
return ret;
}
EXPORT_SYMBOL_GPL(kvmppc_h_stuff_tce);

42
arch/powerpc/kvm/book3s_64_vio_hv.c
View File

@@ -218,13 +218,14 @@ static long kvmppc_rm_ioba_validate(struct kvmppc_spapr_tce_table *stt,
return H_SUCCESS;
}
static long iommu_tce_xchg_rm(struct mm_struct *mm, struct iommu_table *tbl,
static long iommu_tce_xchg_no_kill_rm(struct mm_struct *mm,
struct iommu_table *tbl,
unsigned long entry, unsigned long *hpa,
enum dma_data_direction *direction)
{
long ret;
ret = tbl->it_ops->exchange_rm(tbl, entry, hpa, direction);
ret = tbl->it_ops->xchg_no_kill(tbl, entry, hpa, direction, true);
if (!ret && ((*direction == DMA_FROM_DEVICE) ||
(*direction == DMA_BIDIRECTIONAL))) {
@@ -240,13 +241,20 @@ static long iommu_tce_xchg_rm(struct mm_struct *mm, struct iommu_table *tbl,
return ret;
}
extern void iommu_tce_kill_rm(struct iommu_table *tbl,
unsigned long entry, unsigned long pages)
{
if (tbl->it_ops->tce_kill)
tbl->it_ops->tce_kill(tbl, entry, pages, true);
}
static void kvmppc_rm_clear_tce(struct kvm *kvm, struct iommu_table *tbl,
unsigned long entry)
{
unsigned long hpa = 0;
enum dma_data_direction dir = DMA_NONE;
iommu_tce_xchg_rm(kvm->mm, tbl, entry, &hpa, &dir);
iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir);
}
static long kvmppc_rm_tce_iommu_mapped_dec(struct kvm *kvm,
@@ -278,7 +286,7 @@ static long kvmppc_rm_tce_iommu_do_unmap(struct kvm *kvm,
unsigned long hpa = 0;
long ret;
if (iommu_tce_xchg_rm(kvm->mm, tbl, entry, &hpa, &dir))
if (iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir))
/*
* real mode xchg can fail if struct page crosses
* a page boundary
@@ -290,7 +298,7 @@ static long kvmppc_rm_tce_iommu_do_unmap(struct kvm *kvm,
ret = kvmppc_rm_tce_iommu_mapped_dec(kvm, tbl, entry);
if (ret)
iommu_tce_xchg_rm(kvm->mm, tbl, entry, &hpa, &dir);
iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir);
return ret;
}
@@ -336,7 +344,7 @@ static long kvmppc_rm_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
if (WARN_ON_ONCE_RM(mm_iommu_mapped_inc(mem)))
return H_TOO_HARD;
ret = iommu_tce_xchg_rm(kvm->mm, tbl, entry, &hpa, &dir);
ret = iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir);
if (ret) {
mm_iommu_mapped_dec(mem);
/*
@@ -417,6 +425,8 @@ long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, stt,
stit->tbl, entry, ua, dir);
iommu_tce_kill_rm(stit->tbl, entry, 1);
if (ret != H_SUCCESS) {
kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl, entry);
return ret;
@@ -556,8 +566,10 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
unsigned long tce = be64_to_cpu(((u64 *)tces)[i]);
ua = 0;
if (kvmppc_rm_tce_to_ua(vcpu->kvm, tce, &ua, NULL))
return H_PARAMETER;
if (kvmppc_rm_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) {
ret = H_PARAMETER;
goto invalidate_exit;
}
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) {
ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, stt,
@@ -567,13 +579,17 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
if (ret != H_SUCCESS) {
kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl,
entry);
goto unlock_exit;
goto invalidate_exit;
}
}
kvmppc_rm_tce_put(stt, entry + i, tce);
}
invalidate_exit:
list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
iommu_tce_kill_rm(stit->tbl, entry, npages);
unlock_exit:
if (rmap)
unlock_rmap(rmap);
@@ -616,7 +632,7 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
continue;
if (ret == H_TOO_HARD)
return ret;
goto invalidate_exit;
WARN_ON_ONCE_RM(1);
kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl, entry);
@@ -626,7 +642,11 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
for (i = 0; i < npages; ++i, ioba += (1ULL << stt->page_shift))
kvmppc_rm_tce_put(stt, ioba >> stt->page_shift, tce_value);
return H_SUCCESS;
invalidate_exit:
list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
iommu_tce_kill_rm(stit->tbl, ioba >> stt->page_shift, npages);
return ret;
}
/* This can be called in either virtual mode or real mode */

39
arch/powerpc/kvm/book3s_hv_rmhandlers.S
View File

@@ -29,6 +29,7 @@
#include <asm/asm-compat.h>
#include <asm/feature-fixups.h>
#include <asm/cpuidle.h>
#include <asm/ultravisor-api.h>
/* Sign-extend HDEC if not on POWER9 */
#define EXTEND_HDEC(reg) \
@@ -1085,16 +1086,10 @@ BEGIN_FTR_SECTION
END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
ld r5, VCPU_LR(r4)
ld r6, VCPU_CR(r4)
mtlr r5
mtcr r6
ld r1, VCPU_GPR(R1)(r4)
ld r2, VCPU_GPR(R2)(r4)
ld r3, VCPU_GPR(R3)(r4)
ld r5, VCPU_GPR(R5)(r4)
ld r6, VCPU_GPR(R6)(r4)
ld r7, VCPU_GPR(R7)(r4)
ld r8, VCPU_GPR(R8)(r4)
ld r9, VCPU_GPR(R9)(r4)
ld r10, VCPU_GPR(R10)(r4)
@@ -1112,10 +1107,42 @@ BEGIN_FTR_SECTION
mtspr SPRN_HDSISR, r0
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
ld r6, VCPU_KVM(r4)
lbz r7, KVM_SECURE_GUEST(r6)
cmpdi r7, 0
ld r6, VCPU_GPR(R6)(r4)
ld r7, VCPU_GPR(R7)(r4)
bne ret_to_ultra
lwz r0, VCPU_CR(r4)
mtcr r0
ld r0, VCPU_GPR(R0)(r4)
ld r2, VCPU_GPR(R2)(r4)
ld r3, VCPU_GPR(R3)(r4)
ld r4, VCPU_GPR(R4)(r4)
HRFI_TO_GUEST
b .
/*
* Use UV_RETURN ultracall to return control back to the Ultravisor after
* processing an hypercall or interrupt that was forwarded (a.k.a. reflected)
* to the Hypervisor.
*
* All registers have already been loaded, except:
* R0 = hcall result
* R2 = SRR1, so UV can detect a synthesized interrupt (if any)
* R3 = UV_RETURN
*/
ret_to_ultra:
lwz r0, VCPU_CR(r4)
mtcr r0
ld r0, VCPU_GPR(R3)(r4)
mfspr r2, SPRN_SRR1
li r3, 0
ori r3, r3, UV_RETURN
ld r4, VCPU_GPR(R4)(r4)
sc 2
/*
* Enter the guest on a P9 or later system where we have exactly