From: "Huang, Kai" <kai.huang@intel.com>
To: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"michael.roth@amd.com" <michael.roth@amd.com>
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Subject: Re: [PATCH RFC v7 03/64] KVM: SVM: Advertise private memory support to KVM
Date: Wed, 18 Jan 2023 00:20:59 +0000 [thread overview]
Message-ID: <4e75a1a0b67e7b3ccaf6b140b08a5f2080aedbdb.camel@intel.com> (raw)
In-Reply-To: <20221214194056.161492-4-michael.roth@amd.com>
On Wed, 2022-12-14 at 13:39 -0600, Michael Roth wrote:
> From: Nikunj A Dadhania <nikunj@amd.com>
>
> KVM should use private memory for guests that have upm_mode flag set.
>
> Add a kvm_x86_ops hook for determining UPM support that accounts for
> this situation by only enabling UPM test mode in the case of non-SEV
> guests.
>
> Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
> [mdr: add x86 hook for determining restricted/private memory support]
> Signed-off-by: Michael Roth <michael.roth@amd.com>
> ---
> arch/x86/include/asm/kvm-x86-ops.h | 1 +
> arch/x86/include/asm/kvm_host.h | 1 +
> arch/x86/kvm/svm/svm.c | 10 ++++++++++
> arch/x86/kvm/x86.c | 8 ++++++++
> 4 files changed, 20 insertions(+)
>
> diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h
> index abccd51dcfca..f530a550c092 100644
> --- a/arch/x86/include/asm/kvm-x86-ops.h
> +++ b/arch/x86/include/asm/kvm-x86-ops.h
> @@ -131,6 +131,7 @@ KVM_X86_OP(msr_filter_changed)
> KVM_X86_OP(complete_emulated_msr)
> KVM_X86_OP(vcpu_deliver_sipi_vector)
> KVM_X86_OP_OPTIONAL_RET0(vcpu_get_apicv_inhibit_reasons);
> +KVM_X86_OP_OPTIONAL_RET0(private_mem_enabled);
>
> #undef KVM_X86_OP
> #undef KVM_X86_OP_OPTIONAL
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 2b6244525107..9317abffbf68 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1635,6 +1635,7 @@ struct kvm_x86_ops {
>
> void (*load_mmu_pgd)(struct kvm_vcpu *vcpu, hpa_t root_hpa,
> int root_level);
> + int (*private_mem_enabled)(struct kvm *kvm);
>
> bool (*has_wbinvd_exit)(void);
>
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index 91352d692845..7f3e4d91c0c6 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -4694,6 +4694,14 @@ static int svm_vm_init(struct kvm *kvm)
> return 0;
> }
>
> +static int svm_private_mem_enabled(struct kvm *kvm)
> +{
> + if (sev_guest(kvm))
> + return kvm->arch.upm_mode ? 1 : 0;
> +
> + return IS_ENABLED(CONFIG_HAVE_KVM_PRIVATE_MEM_TESTING) ? 1 : 0;
> +}
> +
Is this new callback really needed? Shouldn't kvm->arch.upm_mode be sufficient
enough to indicate whether the private memory will be used or not?
Probably the CONFIG_HAVE_KVM_PRIVATE_MEM_TESTING is the concern here. But this
Kconfig option is not even x86-specific, so shouldn't the handling of it be done
in common code too?
For instance, can we explicitly set 'kvm->arch.upm_mode' to 'true' at some point
of creating the VM if we see CONFIG_HAVE_KVM_PRIVATE_MEM_TESTING is true?
[snip]
next prev parent reply other threads:[~2023-01-18 0:44 UTC|newest]
Thread overview: 205+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-14 19:39 [PATCH RFC v7 00/64] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Michael Roth
2022-12-14 19:39 ` [PATCH RFC v7 01/64] KVM: Fix memslot boundary condition for large page Michael Roth
2022-12-22 12:16 ` Borislav Petkov
2023-01-05 3:37 ` Chao Peng
2023-01-04 12:01 ` Jarkko Sakkinen
2023-01-05 3:34 ` Chao Peng
2023-01-05 4:08 ` Nikunj A. Dadhania
2023-01-05 8:14 ` Chao Peng
2022-12-14 19:39 ` [PATCH RFC v7 02/64] KVM: x86: Add KVM_CAP_UNMAPPED_PRIVATE_MEMORY Michael Roth
2022-12-22 12:26 ` Borislav Petkov
2023-01-04 17:47 ` Michael Roth
2023-01-05 11:57 ` Borislav Petkov
2023-01-19 13:03 ` Jarkko Sakkinen
2023-01-04 12:03 ` Jarkko Sakkinen
2023-01-04 17:56 ` Michael Roth
2022-12-14 19:39 ` [PATCH RFC v7 03/64] KVM: SVM: Advertise private memory support to KVM Michael Roth
2022-12-23 16:56 ` Borislav Petkov
2023-01-05 2:14 ` Michael Roth
2023-01-05 15:04 ` Borislav Petkov
2023-01-05 18:17 ` Michael Roth
2023-01-13 14:16 ` Borislav Petkov
2023-01-20 21:20 ` Jarkko Sakkinen
2023-02-20 16:18 ` Michael Roth
2023-01-18 0:20 ` Huang, Kai [this message]
2023-01-18 21:33 ` Sean Christopherson
2022-12-14 19:39 ` [PATCH RFC v7 04/64] KVM: x86: Add 'fault_is_private' x86 op Michael Roth
2022-12-29 16:14 ` Borislav Petkov
2023-01-05 2:42 ` Michael Roth
2023-01-13 14:34 ` Borislav Petkov
2023-01-13 15:48 ` Sean Christopherson
2023-01-13 18:45 ` Borislav Petkov
2023-02-20 16:22 ` Michael Roth
2022-12-14 19:39 ` [PATCH RFC v7 05/64] KVM: x86: Add 'update_mem_attr' " Michael Roth
2022-12-30 11:27 ` Borislav Petkov
2022-12-14 19:39 ` [PATCH RFC v7 06/64] KVM: x86: Add platform hooks for private memory invalidations Michael Roth
2022-12-30 11:53 ` Borislav Petkov
2023-01-05 2:27 ` Michael Roth
2023-01-22 12:43 ` Tom Dohrmann
2023-01-26 15:52 ` Jarkko Sakkinen
2022-12-14 19:39 ` [PATCH RFC v7 07/64] KVM: SEV: Handle KVM_HC_MAP_GPA_RANGE hypercall Michael Roth
2023-01-13 16:00 ` Borislav Petkov
2023-01-13 16:17 ` Sean Christopherson
2023-01-16 7:56 ` Nikunj A. Dadhania
2023-01-17 17:19 ` Sean Christopherson
2023-01-27 16:35 ` Jeremi Piotrowski
2023-01-31 14:15 ` Jeremi Piotrowski
2022-12-14 19:40 ` [PATCH RFC v7 08/64] KVM: Move kvm_for_each_memslot_in_hva_range() to be used in SVM Michael Roth
2023-01-13 18:46 ` Borislav Petkov
2022-12-14 19:40 ` [PATCH RFC v7 09/64] KVM: Add HVA range operator Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 10/64] KVM: SEV: Populate private memory fd during LAUNCH_UPDATE_DATA Michael Roth
2023-01-13 19:11 ` Borislav Petkov
2023-02-20 17:49 ` Michael Roth
2023-01-17 23:42 ` Jarkko Sakkinen
2023-02-20 17:54 ` Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 11/64] KVM: SEV: Support private pages in LAUNCH_UPDATE_DATA Michael Roth
2022-12-22 18:24 ` erbse.13
2022-12-23 11:57 ` Nikunj A. Dadhania
2023-01-17 23:30 ` Jarkko Sakkinen
2023-01-18 8:04 ` Nikunj A. Dadhania
2023-02-01 18:22 ` Borislav Petkov
2023-02-02 8:09 ` Nikunj A. Dadhania
2022-12-14 19:40 ` [PATCH RFC v7 12/64] KVM: SEV: Implement .fault_is_private callback Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 13/64] x86/cpufeatures: Add SEV-SNP CPU feature Michael Roth
2023-02-01 18:39 ` Borislav Petkov
2023-02-20 16:26 ` Michael Roth
2023-02-20 17:50 ` Borislav Petkov
2023-02-20 18:00 ` Michael Roth
2023-02-20 18:36 ` Borislav Petkov
2022-12-14 19:40 ` [PATCH RFC v7 14/64] x86/sev: Add the host SEV-SNP initialization support Michael Roth
2023-01-11 14:50 ` Sabin Rapan
2023-01-19 16:26 ` Kalra, Ashish
2023-01-18 15:55 ` Jeremi Piotrowski
2023-01-19 23:59 ` Kalra, Ashish
2023-01-20 16:51 ` Kalra, Ashish
2023-02-02 11:16 ` Borislav Petkov
2022-12-14 19:40 ` [PATCH RFC v7 15/64] x86/sev: Add RMP entry lookup helpers Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 16/64] x86/sev: Add helper functions for RMPUPDATE and PSMASH instruction Michael Roth
2023-01-31 21:26 ` Alexander Graf
2023-02-01 17:14 ` Kalra, Ashish
2023-02-01 17:20 ` Alexander Graf
2023-02-02 19:04 ` Kalra, Ashish
2023-02-08 16:30 ` Liam Merwick
2022-12-14 19:40 ` [PATCH RFC v7 17/64] x86/mm/pat: Introduce set_memory_p Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 18/64] x86/sev: Invalidate pages from the direct map when adding them to the RMP table Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 19/64] x86/traps: Define RMP violation #PF error code Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 20/64] x86/fault: Add support to handle the RMP fault for user address Michael Roth
2023-01-17 10:42 ` Zhi Wang
2022-12-14 19:40 ` [PATCH RFC v7 21/64] x86/fault: fix handle_split_page_fault() to work with memfd backed pages Michael Roth
2022-12-15 1:01 ` Hugh Dickins
2022-12-14 19:40 ` [PATCH RFC v7 22/64] x86/fault: Return pfn from dump_pagetable() for SEV-specific fault handling Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 23/64] x86/fault: Add support to dump RMP entry on fault Michael Roth
2023-01-13 22:56 ` Alper Gun
2023-01-13 23:49 ` Kalra, Ashish
2022-12-14 19:40 ` [PATCH RFC v7 24/64] crypto:ccp: Define the SEV-SNP commands Michael Roth
2023-01-22 16:09 ` Sabin Rapan
2022-12-14 19:40 ` [PATCH RFC v7 25/64] crypto: ccp: Add support to initialize the AMD-SP for SEV-SNP Michael Roth
2022-12-31 15:32 ` Jarkko Sakkinen
2023-01-05 22:40 ` Kalra, Ashish
2023-01-20 22:19 ` Jarkko Sakkinen
2023-01-04 12:12 ` Jarkko Sakkinen
2023-01-05 22:54 ` Kalra, Ashish
2023-01-20 22:56 ` Jarkko Sakkinen
2022-12-14 19:40 ` [PATCH RFC v7 26/64] crypto:ccp: Provide API to issue SEV and SNP commands Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 27/64] crypto: ccp: Introduce snp leaked pages list Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 28/64] crypto: ccp: Handle the legacy TMR allocation when SNP is enabled Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 29/64] crypto: ccp: Handle the legacy SEV command " Michael Roth
2023-01-12 20:47 ` Alper Gun
2023-01-13 22:03 ` Kalra, Ashish
2023-01-13 22:42 ` Alper Gun
2023-01-13 22:48 ` Kalra, Ashish
2023-01-12 23:45 ` Alper Gun
2023-01-13 22:34 ` Kalra, Ashish
2022-12-14 19:40 ` [PATCH RFC v7 30/64] crypto: ccp: Add the SNP_PLATFORM_STATUS command Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 31/64] crypto: ccp: Add the SNP_{SET,GET}_EXT_CONFIG command Michael Roth
2023-01-19 7:23 ` Dov Murik
2022-12-14 19:40 ` [PATCH RFC v7 32/64] crypto: ccp: Provide APIs to query extended attestation report Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 33/64] KVM: SVM: Add support to handle AP reset MSR protocol Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 34/64] KVM: SVM: Provide the Hypervisor Feature support VMGEXIT Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 35/64] KVM: SVM: Make AVIC backing, VMSA and VMCB memory allocation SNP safe Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 36/64] KVM: SVM: Add initial SEV-SNP support Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 37/64] KVM: SVM: Add KVM_SNP_INIT command Michael Roth
2022-12-31 14:27 ` Jarkko Sakkinen
2022-12-31 14:47 ` Jarkko Sakkinen
2022-12-31 15:16 ` Jarkko Sakkinen
2023-01-05 23:37 ` Kalra, Ashish
2023-01-20 23:17 ` Jarkko Sakkinen
2023-01-23 22:49 ` Kalra, Ashish
2023-01-26 21:25 ` Jarkko Sakkinen
2022-12-14 19:40 ` [PATCH RFC v7 38/64] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_START command Michael Roth
2023-03-15 13:50 ` Peter Gonda
2022-12-14 19:40 ` [PATCH RFC v7 39/64] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_UPDATE command Michael Roth
2023-01-11 13:56 ` Tom Dohrmann
2023-01-11 14:04 ` Harald Hoyer
2022-12-14 19:40 ` [PATCH RFC v7 40/64] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_FINISH command Michael Roth
2022-12-19 18:04 ` Tom Lendacky
2022-12-19 23:24 ` Kalra, Ashish
2022-12-20 14:25 ` Tom Lendacky
2023-01-11 13:27 ` Sabin Rapan
2023-01-11 23:18 ` Kalra, Ashish
2022-12-14 19:40 ` [PATCH RFC v7 41/64] KVM: X86: Keep the NPT and RMP page level in sync Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 42/64] KVM: x86: Define RMP page fault error bits for #NPF Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 43/64] KVM: SVM: Do not use long-lived GHCB map while setting scratch area Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 44/64] KVM: SVM: Remove the long-lived GHCB host map Michael Roth
2023-01-18 15:27 ` Jeremi Piotrowski
2023-01-18 18:15 ` Alper Gun
2023-01-20 20:10 ` Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 45/64] KVM: SVM: Add support to handle GHCB GPA register VMGEXIT Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 46/64] KVM: SVM: Add KVM_EXIT_VMGEXIT Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 47/64] KVM: SVM: Add support to handle MSR based Page State Change VMGEXIT Michael Roth
2023-01-11 14:38 ` Tom Dohrmann
2022-12-14 19:40 ` [PATCH RFC v7 48/64] KVM: SVM: Add support to handle " Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 49/64] KVM: SVM: Introduce ops for the post gfn map and unmap Michael Roth
2023-01-11 13:49 ` Sabin Rapan
2022-12-14 19:40 ` [PATCH RFC v7 50/64] KVM: x86: Export the kvm_zap_gfn_range() for the SNP use Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 51/64] KVM: SVM: Add support to handle the RMP nested page fault Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 52/64] KVM: SVM: Provide support for SNP_GUEST_REQUEST NAE event Michael Roth
2023-01-09 3:33 ` Alexey Kardashevskiy
2023-01-09 23:41 ` Kalra, Ashish
2023-01-10 2:28 ` Alexey Kardashevskiy
2023-01-10 8:33 ` Kalra, Ashish
2023-01-11 0:48 ` Alexey Kardashevskiy
2023-01-11 2:01 ` Kalra, Ashish
2023-01-31 1:54 ` Alexey Kardashevskiy
2023-01-31 16:23 ` Tom Lendacky
2023-01-31 20:21 ` Alexey Kardashevskiy
2023-01-31 21:21 ` Tom Lendacky
2023-01-31 22:00 ` Alexey Kardashevskiy
2023-01-31 22:42 ` Tom Lendacky
2023-05-11 23:02 ` Dionna Amalie Glaze
2023-05-11 23:32 ` Sean Christopherson
2023-05-15 16:45 ` Dionna Amalie Glaze
2023-01-31 17:52 ` Kalra, Ashish
2023-02-06 3:13 ` [PATCH kernel] KVM: SVM: Fix SVM_VMGEXIT_EXT_GUEST_REQUEST to follow the rest of API Alexey Kardashevskiy
2023-02-06 21:57 ` Kalra, Ashish
2023-02-07 1:24 ` Alexey Kardashevskiy
2023-02-08 21:50 ` Kalra, Ashish
2023-01-19 20:35 ` [PATCH RFC v7 52/64] KVM: SVM: Provide support for SNP_GUEST_REQUEST NAE event Dionna Amalie Glaze
2023-01-19 20:54 ` Kalra, Ashish
2023-01-19 21:06 ` Dov Murik
2022-12-14 19:40 ` [PATCH RFC v7 53/64] KVM: SVM: Use a VMSA physical address variable for populating VMCB Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 54/64] KVM: SVM: Support SEV-SNP AP Creation NAE event Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 55/64] KVM: SVM: Add SNP-specific handling for memory attribute updates Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 56/64] KVM: x86/mmu: Generate KVM_EXIT_MEMORY_FAULT for implicit conversions for SNP Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 57/64] KVM: SEV: Handle restricted memory invalidations " Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 58/64] KVM: SVM: Add module parameter to enable the SEV-SNP Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 59/64] ccp: Add support to decrypt the page Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 60/64] KVM: SVM: Sync the GHCB scratch buffer using already mapped ghcb Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 61/64] KVM: SVM: Make VMSAVE target area memory allocation SNP safe Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 62/64] x86/sev: Add KVM commands for instance certs Michael Roth
2022-12-22 14:57 ` Dov Murik
2023-01-09 16:55 ` Dionna Amalie Glaze
2023-01-09 22:27 ` Tom Lendacky
2023-01-10 7:10 ` Dov Murik
2023-01-10 15:10 ` Tom Lendacky
2023-01-10 15:23 ` Peter Gonda
2023-01-11 7:26 ` Dov Murik
2023-01-11 6:00 ` Dov Murik
2023-01-11 14:32 ` Tom Lendacky
2023-01-19 18:49 ` Dionna Amalie Glaze
2023-01-19 22:18 ` Kalra, Ashish
2023-01-20 1:40 ` Dionna Amalie Glaze
2022-12-14 19:40 ` [PATCH RFC v7 63/64] x86/sev: Document KVM_SEV_SNP_{G,S}ET_CERTS Michael Roth
2022-12-14 19:40 ` [PATCH RFC v7 64/64] iommu/amd: Add IOMMU_SNP_SHUTDOWN support Michael Roth
2022-12-23 20:33 ` [PATCH RFC v7 00/64] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Borislav Petkov
2023-01-04 17:21 ` Michael Roth
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