From: Michael Roth <michael.roth@amd.com>
To: <kvm@vger.kernel.org>
Cc: <linux-coco@lists.linux.dev>, <linux-mm@kvack.org>,
<linux-crypto@vger.kernel.org>, <x86@kernel.org>,
<linux-kernel@vger.kernel.org>, <tglx@linutronix.de>,
<mingo@redhat.com>, <jroedel@suse.de>, <thomas.lendacky@amd.com>,
<hpa@zytor.com>, <ardb@kernel.org>, <pbonzini@redhat.com>,
<seanjc@google.com>, <vkuznets@redhat.com>, <jmattson@google.com>,
<luto@kernel.org>, <dave.hansen@linux.intel.com>,
<slp@redhat.com>, <pgonda@google.com>, <peterz@infradead.org>,
<srinivas.pandruvada@linux.intel.com>, <rientjes@google.com>,
<dovmurik@linux.ibm.com>, <tobin@ibm.com>, <bp@alien8.de>,
<vbabka@suse.cz>, <kirill@shutemov.name>, <ak@linux.intel.com>,
<tony.luck@intel.com>,
<sathyanarayanan.kuppuswamy@linux.intel.com>,
<alpergun@google.com>, <jarkko@kernel.org>,
<ashish.kalra@amd.com>, <nikunj.dadhania@amd.com>,
<pankaj.gupta@amd.com>, <liam.merwick@oracle.com>,
Brijesh Singh <brijesh.singh@amd.com>
Subject: [PATCH v12 16/29] KVM: x86: Export the kvm_zap_gfn_range() for the SNP use
Date: Fri, 29 Mar 2024 17:58:22 -0500 [thread overview]
Message-ID: <20240329225835.400662-17-michael.roth@amd.com> (raw)
In-Reply-To: <20240329225835.400662-1-michael.roth@amd.com>
From: Brijesh Singh <brijesh.singh@amd.com>
While resolving the RMP page fault, there may be cases where the page
level between the RMP entry and TDP does not match and the 2M RMP entry
must be split into 4K RMP entries. Or a 2M TDP page need to be broken
into multiple of 4K pages.
To keep the RMP and TDP page level in sync, zap the gfn range after
splitting the pages in the RMP entry. The zap should force the TDP to
gets rebuilt with the new page level.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/mmu.h | 2 --
arch/x86/kvm/mmu/mmu.c | 1 +
3 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a3f8eba8d8b6..49b294a8d917 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1950,6 +1950,7 @@ void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
const struct kvm_memory_slot *memslot);
void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen);
void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages);
+void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end);
int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 2c54ba5b0a28..89da37be241a 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -253,8 +253,6 @@ static inline bool kvm_mmu_honors_guest_mtrrs(struct kvm *kvm)
return __kvm_mmu_honors_guest_mtrrs(kvm_arch_has_noncoherent_dma(kvm));
}
-void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end);
-
int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu);
int kvm_mmu_post_init_vm(struct kvm *kvm);
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 0049d49aa913..c5af52e3f0c5 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -6772,6 +6772,7 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm,
return need_tlb_flush;
}
+EXPORT_SYMBOL_GPL(kvm_zap_gfn_range);
static void kvm_rmap_zap_collapsible_sptes(struct kvm *kvm,
const struct kvm_memory_slot *slot)
--
2.25.1
next prev parent reply other threads:[~2024-03-29 23:01 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-29 22:58 [PATCH v12 00/29] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 01/29] [TEMP] x86/kvm/Kconfig: Have KVM_AMD_SEV select ARCH_HAS_CC_PLATFORM Michael Roth
2024-03-29 22:58 ` [PATCH v12 02/29] [TEMP] x86/cc: Add cc_platform_set/_clear() helpers Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 03/29] [TEMP] x86/CPU/AMD: Track SNP host status with cc_platform_*() Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 04/29] [TEMP] fixup! KVM: SEV: sync FPU and AVX state at LAUNCH_UPDATE_VMSA time Michael Roth
2024-03-29 22:58 ` [PATCH v12 05/29] KVM: x86: Define RMP page fault error bits for #NPF Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 19:28 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 06/29] KVM: SEV: Select KVM_GENERIC_PRIVATE_MEM when CONFIG_KVM_AMD_SEV=y Michael Roth
2024-03-29 22:58 ` [PATCH v12 07/29] KVM: SEV: Add support to handle AP reset MSR protocol Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 08/29] KVM: SEV: Add GHCB handling for Hypervisor Feature Support requests Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 09/29] KVM: SEV: Add initial SEV-SNP support Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 19:58 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 10/29] KVM: SEV: Add KVM_SEV_SNP_LAUNCH_START command Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 20:20 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 11/29] KVM: SEV: Add KVM_SEV_SNP_LAUNCH_UPDATE command Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 20:31 ` Paolo Bonzini
2024-04-01 22:22 ` Michael Roth
2024-04-02 22:58 ` Isaku Yamahata
2024-04-03 12:51 ` Paolo Bonzini
2024-04-03 15:37 ` Isaku Yamahata
2024-04-04 16:03 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 12/29] KVM: SEV: Add KVM_SEV_SNP_LAUNCH_FINISH command Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 20:41 ` Paolo Bonzini
2024-04-01 23:17 ` Michael Roth
2024-04-03 12:56 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 13/29] KVM: SEV: Add support to handle GHCB GPA register VMGEXIT Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 14/29] KVM: SEV: Add support to handle MSR based Page State Change VMGEXIT Michael Roth
2024-03-29 22:58 ` [PATCH v12 15/29] KVM: SEV: Add support to handle " Michael Roth
2024-03-29 22:58 ` Michael Roth [this message]
2024-03-30 20:51 ` [PATCH v12 16/29] KVM: x86: Export the kvm_zap_gfn_range() for the SNP use Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 17/29] KVM: SEV: Add support to handle RMP nested page faults Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 20:55 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 18/29] KVM: SEV: Use a VMSA physical address variable for populating VMCB Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 21:01 ` Paolo Bonzini
2024-04-16 11:53 ` Paolo Bonzini
2024-04-16 14:25 ` Tom Lendacky
2024-04-16 17:00 ` Paolo Bonzini
2024-04-17 20:57 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 19/29] KVM: SEV: Support SEV-SNP AP Creation NAE event Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 20/29] KVM: SEV: Add support for GHCB-based termination requests Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 21/29] KVM: SEV: Implement gmem hook for initializing private pages Michael Roth
2024-03-30 21:05 ` Paolo Bonzini
2024-03-30 21:05 ` Paolo Bonzini
2024-03-30 21:05 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 22/29] KVM: SEV: Implement gmem hook for invalidating " Michael Roth
2024-03-30 21:31 ` Paolo Bonzini
2024-03-30 21:31 ` Paolo Bonzini
2024-03-30 21:31 ` Paolo Bonzini
2024-04-18 19:57 ` Michael Roth
2024-03-29 22:58 ` [PATCH v12 23/29] KVM: x86: Implement gmem hook for determining max NPT mapping level Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-30 21:35 ` Paolo Bonzini
2024-03-30 21:35 ` Paolo Bonzini
2024-03-30 21:35 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 24/29] KVM: SEV: Avoid WBINVD for HVA-based MMU notifications for SNP Michael Roth
2024-03-30 21:35 ` Paolo Bonzini
2024-03-30 21:35 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 25/29] KVM: SVM: Add module parameter to enable the SEV-SNP Michael Roth
2024-03-30 21:35 ` Paolo Bonzini
2024-03-30 21:35 ` Paolo Bonzini
2024-03-29 22:58 ` [PATCH v12 26/29] KVM: SEV: Provide support for SNP_GUEST_REQUEST NAE event Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-04-10 22:14 ` Tom Lendacky
2024-03-29 22:58 ` [PATCH v12 27/29] crypto: ccp: Add the SNP_VLEK_LOAD command Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-04-10 22:20 ` Tom Lendacky
2024-03-29 22:58 ` [PATCH v12 28/29] crypto: ccp: Add the SNP_{PAUSE,RESUME}_ATTESTATION commands Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-04-10 22:27 ` Tom Lendacky
2024-03-29 22:58 ` [PATCH v12 29/29] KVM: SEV: Provide support for SNP_EXTENDED_GUEST_REQUEST NAE event Michael Roth
2024-03-29 22:58 ` Michael Roth
2024-04-11 13:33 ` Tom Lendacky
2024-03-30 21:44 ` [PATCH v12 00/29] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Paolo Bonzini
2024-03-30 21:44 ` Paolo Bonzini
2024-03-30 21:44 ` Paolo Bonzini
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