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Wed, 05 Aug 2020 18:57:54 +0100 From: Marc Zyngier To: Paolo Bonzini Subject: [PATCH 35/56] KVM: arm64: Use TTL hint in when invalidating stage-2 translations Date: Wed, 5 Aug 2020 18:56:39 +0100 Message-Id: <20200805175700.62775-36-maz@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200805175700.62775-1-maz@kernel.org> References: <20200805175700.62775-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: pbonzini@redhat.com, graf@amazon.com, alexandru.elisei@arm.com, ascull@google.com, catalin.marinas@arm.com, christoffer.dall@arm.com, dbrazdil@google.com, eric.auger@redhat.com, gshan@redhat.com, james.morse@arm.com, mark.rutland@arm.com, richard.peng@oppo.com, qperret@google.com, will@kernel.org, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200805_142707_447953_69C81A53 X-CRM114-Status: GOOD ( 16.62 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Peng Hao , kernel-team@android.com, Gavin Shan , kvm@vger.kernel.org, Will Deacon , Quentin Perret , Catalin Marinas , Suzuki K Poulose , Christoffer Dall , Eric Auger , Alexander Graf , Andrew Scull , James Morse , David Brazdil , Alexandru Elisei , kvmarm@lists.cs.columbia.edu, Julien Thierry , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Since we often have a precise idea of the level we're dealing with when invalidating TLBs, we can provide it to as a hint to our invalidation helper. Reviewed-by: James Morse Reviewed-by: Alexandru Elisei Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_asm.h | 3 ++- arch/arm64/kvm/hyp/nvhe/tlb.c | 5 +++-- arch/arm64/kvm/hyp/vhe/tlb.c | 5 +++-- arch/arm64/kvm/mmu.c | 29 +++++++++++++++-------------- 4 files changed, 23 insertions(+), 19 deletions(-) diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 18d39b30d9c9..61f654a4ae00 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -91,7 +91,8 @@ DECLARE_KVM_HYP_SYM(__bp_harden_hyp_vecs); #endif extern void __kvm_flush_vm_context(void); -extern void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa); +extern void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa, + int level); extern void __kvm_tlb_flush_vmid(struct kvm_s2_mmu *mmu); extern void __kvm_tlb_flush_local_vmid(struct kvm_s2_mmu *mmu); diff --git a/arch/arm64/kvm/hyp/nvhe/tlb.c b/arch/arm64/kvm/hyp/nvhe/tlb.c index 11dbe031f0ba..69eae608d670 100644 --- a/arch/arm64/kvm/hyp/nvhe/tlb.c +++ b/arch/arm64/kvm/hyp/nvhe/tlb.c @@ -46,7 +46,8 @@ static void __tlb_switch_to_host(struct tlb_inv_context *cxt) } } -void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa) +void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, + phys_addr_t ipa, int level) { struct tlb_inv_context cxt; @@ -62,7 +63,7 @@ void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa) * whole of Stage-1. Weep... */ ipa >>= 12; - __tlbi(ipas2e1is, ipa); + __tlbi_level(ipas2e1is, ipa, level); /* * We have to ensure completion of the invalidation at Stage-2, diff --git a/arch/arm64/kvm/hyp/vhe/tlb.c b/arch/arm64/kvm/hyp/vhe/tlb.c index ada1d56f0709..fd7895945bbc 100644 --- a/arch/arm64/kvm/hyp/vhe/tlb.c +++ b/arch/arm64/kvm/hyp/vhe/tlb.c @@ -79,7 +79,8 @@ static void __tlb_switch_to_host(struct tlb_inv_context *cxt) local_irq_restore(cxt->flags); } -void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa) +void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, + phys_addr_t ipa, int level) { struct tlb_inv_context cxt; @@ -94,7 +95,7 @@ void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa) * whole of Stage-1. Weep... */ ipa >>= 12; - __tlbi(ipas2e1is, ipa); + __tlbi_level(ipas2e1is, ipa, level); /* * We have to ensure completion of the invalidation at Stage-2, diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 2c6d59b509a5..41eedbfd961e 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -58,9 +58,10 @@ void kvm_flush_remote_tlbs(struct kvm *kvm) kvm_call_hyp(__kvm_tlb_flush_vmid, &kvm->arch.mmu); } -static void kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa) +static void kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa, + int level) { - kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ipa); + kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ipa, level); } /* @@ -102,7 +103,7 @@ static void stage2_dissolve_pmd(struct kvm_s2_mmu *mmu, phys_addr_t addr, pmd_t return; pmd_clear(pmd); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL); put_page(virt_to_page(pmd)); } @@ -122,7 +123,7 @@ static void stage2_dissolve_pud(struct kvm_s2_mmu *mmu, phys_addr_t addr, pud_t return; stage2_pud_clear(kvm, pudp); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL); put_page(virt_to_page(pudp)); } @@ -163,7 +164,7 @@ static void clear_stage2_pgd_entry(struct kvm_s2_mmu *mmu, pgd_t *pgd, phys_addr struct kvm *kvm = mmu->kvm; p4d_t *p4d_table __maybe_unused = stage2_p4d_offset(kvm, pgd, 0UL); stage2_pgd_clear(kvm, pgd); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT); stage2_p4d_free(kvm, p4d_table); put_page(virt_to_page(pgd)); } @@ -173,7 +174,7 @@ static void clear_stage2_p4d_entry(struct kvm_s2_mmu *mmu, p4d_t *p4d, phys_addr struct kvm *kvm = mmu->kvm; pud_t *pud_table __maybe_unused = stage2_pud_offset(kvm, p4d, 0); stage2_p4d_clear(kvm, p4d); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT); stage2_pud_free(kvm, pud_table); put_page(virt_to_page(p4d)); } @@ -185,7 +186,7 @@ static void clear_stage2_pud_entry(struct kvm_s2_mmu *mmu, pud_t *pud, phys_addr VM_BUG_ON(stage2_pud_huge(kvm, *pud)); stage2_pud_clear(kvm, pud); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT); stage2_pmd_free(kvm, pmd_table); put_page(virt_to_page(pud)); } @@ -195,7 +196,7 @@ static void clear_stage2_pmd_entry(struct kvm_s2_mmu *mmu, pmd_t *pmd, phys_addr pte_t *pte_table = pte_offset_kernel(pmd, 0); VM_BUG_ON(pmd_thp_or_huge(*pmd)); pmd_clear(pmd); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT); free_page((unsigned long)pte_table); put_page(virt_to_page(pmd)); } @@ -273,7 +274,7 @@ static void unmap_stage2_ptes(struct kvm_s2_mmu *mmu, pmd_t *pmd, pte_t old_pte = *pte; kvm_set_pte(pte, __pte(0)); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PTE_LEVEL); /* No need to invalidate the cache for device mappings */ if (!kvm_is_device_pfn(pte_pfn(old_pte))) @@ -302,7 +303,7 @@ static void unmap_stage2_pmds(struct kvm_s2_mmu *mmu, pud_t *pud, pmd_t old_pmd = *pmd; pmd_clear(pmd); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL); kvm_flush_dcache_pmd(old_pmd); @@ -332,7 +333,7 @@ static void unmap_stage2_puds(struct kvm_s2_mmu *mmu, p4d_t *p4d, pud_t old_pud = *pud; stage2_pud_clear(kvm, pud); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL); kvm_flush_dcache_pud(old_pud); put_page(virt_to_page(pud)); } else { @@ -1260,7 +1261,7 @@ static int stage2_set_pmd_huge(struct kvm_s2_mmu *mmu, */ WARN_ON_ONCE(pmd_pfn(old_pmd) != pmd_pfn(*new_pmd)); pmd_clear(pmd); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL); } else { get_page(virt_to_page(pmd)); } @@ -1302,7 +1303,7 @@ static int stage2_set_pud_huge(struct kvm_s2_mmu *mmu, WARN_ON_ONCE(kvm_pud_pfn(old_pud) != kvm_pud_pfn(*new_pudp)); stage2_pud_clear(kvm, pudp); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL); } else { get_page(virt_to_page(pudp)); } @@ -1451,7 +1452,7 @@ static int stage2_set_pte(struct kvm_s2_mmu *mmu, return 0; kvm_set_pte(pte, __pte(0)); - kvm_tlb_flush_vmid_ipa(mmu, addr); + kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PTE_LEVEL); } else { get_page(virt_to_page(pte)); }