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| author | Maxim Levitsky <mlevitsk@redhat.com> | 2020-08-27 19:11:40 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-09-28 13:57:11 +0200 |
| commit | f4c847a95654b898834ed513870a4fb01c27b29e (patch) | |
| tree | 23cad63940f3a61bbe5ab706271fc76af67df550 /arch | |
| parent | KVM: nSVM: rename nested vmcb to vmcb12 (diff) | |
| download | linux-f4c847a95654b898834ed513870a4fb01c27b29e.tar.xz linux-f4c847a95654b898834ed513870a4fb01c27b29e.zip | |
KVM: SVM: refactor msr permission bitmap allocation
Replace svm_vcpu_init_msrpm with svm_vcpu_alloc_msrpm, that also allocates
the msr bitmap and add svm_vcpu_free_msrpm to free it.
This will be used later to move the nested msr permission bitmap allocation
to nested.c
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200827171145.374620-4-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 45 |
1 files changed, 23 insertions, 22 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index bd3515f25ce2..535839cdcb56 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -609,18 +609,29 @@ static void set_msr_interception(u32 *msrpm, unsigned msr, msrpm[offset] = tmp; } -static void svm_vcpu_init_msrpm(u32 *msrpm) +static u32 *svm_vcpu_init_msrpm(void) { int i; + u32 *msrpm; + struct page *pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER); + + if (!pages) + return NULL; + msrpm = page_address(pages); memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER)); for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { if (!direct_access_msrs[i].always) continue; - set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1); } + return msrpm; +} + +static void svm_vcpu_free_msrpm(u32 *msrpm) +{ + __free_pages(virt_to_page(msrpm), MSRPM_ALLOC_ORDER); } static void add_msr_offset(u32 offset) @@ -1172,9 +1183,7 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm; struct page *vmcb_page; - struct page *msrpm_pages; struct page *hsave_page; - struct page *nested_msrpm_pages; int err; BUILD_BUG_ON(offsetof(struct vcpu_svm, vcpu) != 0); @@ -1185,21 +1194,13 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu) if (!vmcb_page) goto out; - msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER); - if (!msrpm_pages) - goto free_page1; - - nested_msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER); - if (!nested_msrpm_pages) - goto free_page2; - hsave_page = alloc_page(GFP_KERNEL_ACCOUNT); if (!hsave_page) - goto free_page3; + goto free_page1; err = avic_init_vcpu(svm); if (err) - goto free_page4; + goto free_page2; /* We initialize this flag to true to make sure that the is_running * bit would be set the first time the vcpu is loaded. @@ -1210,11 +1211,13 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu) svm->nested.hsave = page_address(hsave_page); clear_page(svm->nested.hsave); - svm->msrpm = page_address(msrpm_pages); - svm_vcpu_init_msrpm(svm->msrpm); + svm->msrpm = svm_vcpu_init_msrpm(); + if (!svm->msrpm) + goto free_page2; - svm->nested.msrpm = page_address(nested_msrpm_pages); - svm_vcpu_init_msrpm(svm->nested.msrpm); + svm->nested.msrpm = svm_vcpu_init_msrpm(); + if (!svm->nested.msrpm) + goto free_page3; svm->vmcb = page_address(vmcb_page); clear_page(svm->vmcb); @@ -1227,12 +1230,10 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu) return 0; -free_page4: - __free_page(hsave_page); free_page3: - __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER); + svm_vcpu_free_msrpm(svm->msrpm); free_page2: - __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER); + __free_page(hsave_page); free_page1: __free_page(vmcb_page); out: |