Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Marcelo Tosatti. * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86 emulator: use stack size attribute to mask rsp in stack ops KVM: MMU: Fix mmu_shrink() so that it can free mmu pages as intended ppc: e500_tlb memset clears nothing KVM: PPC: Add cache flush on page map KVM: PPC: Book3S HV: Fix incorrect branch in H_CEDE code KVM: x86: update KVM_SAVE_MSRS_BEGIN to correct value
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commit
6ec9776c28
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@ -33,6 +33,7 @@
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#include <asm/kvm_asm.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/cacheflush.h>
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#define KVM_MAX_VCPUS NR_CPUS
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#define KVM_MAX_VCORES NR_CPUS
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@ -219,4 +219,16 @@ void kvmppc_claim_lpid(long lpid);
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void kvmppc_free_lpid(long lpid);
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void kvmppc_init_lpid(unsigned long nr_lpids);
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static inline void kvmppc_mmu_flush_icache(pfn_t pfn)
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{
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/* Clear i-cache for new pages */
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struct page *page;
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page = pfn_to_page(pfn);
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if (!test_bit(PG_arch_1, &page->flags)) {
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flush_dcache_icache_page(page);
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set_bit(PG_arch_1, &page->flags);
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}
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}
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#endif /* __POWERPC_KVM_PPC_H__ */
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@ -211,6 +211,9 @@ next_pteg:
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pteg1 |= PP_RWRX;
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}
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if (orig_pte->may_execute)
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kvmppc_mmu_flush_icache(hpaddr >> PAGE_SHIFT);
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local_irq_disable();
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if (pteg[rr]) {
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@ -126,6 +126,8 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
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if (!orig_pte->may_execute)
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rflags |= HPTE_R_N;
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else
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kvmppc_mmu_flush_icache(hpaddr >> PAGE_SHIFT);
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hash = hpt_hash(va, PTE_SIZE, MMU_SEGSIZE_256M);
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@ -1421,13 +1421,13 @@ _GLOBAL(kvmppc_h_cede)
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sync /* order setting ceded vs. testing prodded */
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lbz r5,VCPU_PRODDED(r3)
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cmpwi r5,0
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bne 1f
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bne kvm_cede_prodded
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li r0,0 /* set trap to 0 to say hcall is handled */
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stw r0,VCPU_TRAP(r3)
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li r0,H_SUCCESS
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std r0,VCPU_GPR(R3)(r3)
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BEGIN_FTR_SECTION
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b 2f /* just send it up to host on 970 */
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b kvm_cede_exit /* just send it up to host on 970 */
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END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_206)
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/*
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@ -1446,7 +1446,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_206)
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or r4,r4,r0
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PPC_POPCNTW(R7,R4)
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cmpw r7,r8
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bge 2f
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bge kvm_cede_exit
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stwcx. r4,0,r6
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bne 31b
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li r0,1
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@ -1555,7 +1555,8 @@ kvm_end_cede:
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b hcall_real_fallback
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/* cede when already previously prodded case */
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1: li r0,0
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kvm_cede_prodded:
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li r0,0
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stb r0,VCPU_PRODDED(r3)
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sync /* order testing prodded vs. clearing ceded */
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stb r0,VCPU_CEDED(r3)
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@ -1563,7 +1564,8 @@ kvm_end_cede:
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blr
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/* we've ceded but we want to give control to the host */
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2: li r3,H_TOO_HARD
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kvm_cede_exit:
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li r3,H_TOO_HARD
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blr
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secondary_too_late:
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@ -322,11 +322,11 @@ static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref)
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static void clear_tlb1_bitmap(struct kvmppc_vcpu_e500 *vcpu_e500)
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{
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if (vcpu_e500->g2h_tlb1_map)
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memset(vcpu_e500->g2h_tlb1_map,
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sizeof(u64) * vcpu_e500->gtlb_params[1].entries, 0);
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memset(vcpu_e500->g2h_tlb1_map, 0,
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sizeof(u64) * vcpu_e500->gtlb_params[1].entries);
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if (vcpu_e500->h2g_tlb1_rmap)
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memset(vcpu_e500->h2g_tlb1_rmap,
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sizeof(unsigned int) * host_tlb_params[1].entries, 0);
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memset(vcpu_e500->h2g_tlb1_rmap, 0,
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sizeof(unsigned int) * host_tlb_params[1].entries);
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}
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static void clear_tlb_privs(struct kvmppc_vcpu_e500 *vcpu_e500)
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@ -539,6 +539,9 @@ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
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kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize,
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ref, gvaddr, stlbe);
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/* Clear i-cache for new pages */
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kvmppc_mmu_flush_icache(pfn);
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}
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/* XXX only map the one-one case, for now use TLB0 */
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@ -469,6 +469,7 @@ void flush_dcache_icache_page(struct page *page)
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__flush_dcache_icache_phys(page_to_pfn(page) << PAGE_SHIFT);
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#endif
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}
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EXPORT_SYMBOL(flush_dcache_icache_page);
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void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
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{
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@ -475,13 +475,26 @@ register_address(struct x86_emulate_ctxt *ctxt, unsigned long reg)
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return address_mask(ctxt, reg);
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}
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static void masked_increment(ulong *reg, ulong mask, int inc)
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{
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assign_masked(reg, *reg + inc, mask);
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}
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static inline void
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register_address_increment(struct x86_emulate_ctxt *ctxt, unsigned long *reg, int inc)
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{
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ulong mask;
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if (ctxt->ad_bytes == sizeof(unsigned long))
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*reg += inc;
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mask = ~0UL;
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else
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*reg = (*reg & ~ad_mask(ctxt)) | ((*reg + inc) & ad_mask(ctxt));
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mask = ad_mask(ctxt);
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masked_increment(reg, mask, inc);
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}
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static void rsp_increment(struct x86_emulate_ctxt *ctxt, int inc)
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{
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masked_increment(&ctxt->regs[VCPU_REGS_RSP], stack_mask(ctxt), inc);
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}
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static inline void jmp_rel(struct x86_emulate_ctxt *ctxt, int rel)
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{
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struct segmented_address addr;
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register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP], -bytes);
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addr.ea = register_address(ctxt, ctxt->regs[VCPU_REGS_RSP]);
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rsp_increment(ctxt, -bytes);
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addr.ea = ctxt->regs[VCPU_REGS_RSP] & stack_mask(ctxt);
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addr.seg = VCPU_SREG_SS;
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return segmented_write(ctxt, addr, data, bytes);
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@ -1542,13 +1555,13 @@ static int emulate_pop(struct x86_emulate_ctxt *ctxt,
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int rc;
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struct segmented_address addr;
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addr.ea = register_address(ctxt, ctxt->regs[VCPU_REGS_RSP]);
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addr.ea = ctxt->regs[VCPU_REGS_RSP] & stack_mask(ctxt);
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addr.seg = VCPU_SREG_SS;
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rc = segmented_read(ctxt, addr, dest, len);
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if (rc != X86EMUL_CONTINUE)
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return rc;
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register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP], len);
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rsp_increment(ctxt, len);
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return rc;
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}
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@ -1688,8 +1701,7 @@ static int em_popa(struct x86_emulate_ctxt *ctxt)
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while (reg >= VCPU_REGS_RAX) {
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if (reg == VCPU_REGS_RSP) {
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register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP],
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ctxt->op_bytes);
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rsp_increment(ctxt, ctxt->op_bytes);
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--reg;
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}
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rc = emulate_pop(ctxt, &ctxt->dst.val, ctxt->op_bytes);
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if (rc != X86EMUL_CONTINUE)
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return rc;
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register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP], ctxt->src.val);
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rsp_increment(ctxt, ctxt->src.val);
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return X86EMUL_CONTINUE;
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}
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@ -4112,17 +4112,22 @@ static int mmu_shrink(struct shrinker *shrink, struct shrink_control *sc)
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int idx;
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LIST_HEAD(invalid_list);
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/*
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* Never scan more than sc->nr_to_scan VM instances.
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* Will not hit this condition practically since we do not try
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* to shrink more than one VM and it is very unlikely to see
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* !n_used_mmu_pages so many times.
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*/
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if (!nr_to_scan--)
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break;
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/*
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* n_used_mmu_pages is accessed without holding kvm->mmu_lock
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* here. We may skip a VM instance errorneosly, but we do not
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* want to shrink a VM that only started to populate its MMU
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* anyway.
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*/
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if (kvm->arch.n_used_mmu_pages > 0) {
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if (!nr_to_scan--)
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break;
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if (!kvm->arch.n_used_mmu_pages)
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continue;
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}
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idx = srcu_read_lock(&kvm->srcu);
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spin_lock(&kvm->mmu_lock);
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@ -806,7 +806,7 @@ EXPORT_SYMBOL_GPL(kvm_rdpmc);
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* kvm-specific. Those are put in the beginning of the list.
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*/
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#define KVM_SAVE_MSRS_BEGIN 9
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#define KVM_SAVE_MSRS_BEGIN 10
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static u32 msrs_to_save[] = {
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MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
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MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
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