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openSUSE:Step:15-SP2
xen.31136
xsa435-0-30.patch
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File xsa435-0-30.patch of Package xen.31136
From 1b67fccf3b02825f6a036bad06cd17963d0972d2 Mon Sep 17 00:00:00 2001 From: Andrew Cooper <andrew.cooper3@citrix.com> Date: Mon, 3 Apr 2023 14:18:43 +0100 Subject: libx86: Update library API for cpu_policy Adjust the API and comments appropriately. x86_cpu_policy_fill_native() will eventually contain MSR reads, but leave a TODO in the short term. No practical change. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Jan Beulich <jbeulich@suse.com> tools/libs/guest: Fix build following libx86 changes I appear to have lost this hunk somewhere... Fixes: 1b67fccf3b02 ("libx86: Update library API for cpu_policy") Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Roger Pau Monné <roger.pau@citrix.com> --- a/tools/libxc/xc_cpuid_x86.c +++ b/tools/libxc/xc_cpuid_x86.c @@ -775,7 +775,7 @@ static void sanitise_featureset(struct c const uint32_t *dfs; if ( !test_bit(b, disabled_features) || - !(dfs = x86_cpuid_lookup_deep_deps(b)) ) + !(dfs = x86_cpu_policy_lookup_deep_deps(b)) ) continue; for ( i = 0; i < ARRAY_SIZE(disabled_features); ++i ) --- a/tools/tests/x86_emulator/x86-emulate.c +++ b/tools/tests/x86_emulator/x86-emulate.c @@ -65,7 +65,7 @@ bool emul_test_init(void) unsigned long sp; - x86_cpuid_policy_fill_native(&cp); + x86_cpu_policy_fill_native(&cp); /* * The emulator doesn't use these instructions, so can always emulate --- a/xen/arch/x86/cpu-policy.c +++ b/xen/arch/x86/cpu-policy.c @@ -162,7 +162,7 @@ static void sanitise_featureset(uint32_t for_each_set_bit(i, (void *)disabled_features, sizeof(disabled_features) * 8) { - const uint32_t *dfs = x86_cpuid_lookup_deep_deps(i); + const uint32_t *dfs = x86_cpu_policy_lookup_deep_deps(i); unsigned int j; ASSERT(dfs); /* deep_features[] should guarentee this. */ @@ -342,7 +342,7 @@ static void __init calculate_raw_policy( { struct cpu_policy *p = &raw_cpu_policy; - x86_cpuid_policy_fill_native(p); + x86_cpu_policy_fill_native(p); p->x86_vendor = boot_cpu_data.x86_vendor; --- a/xen/arch/x86/cpu/common.c +++ b/xen/arch/x86/cpu/common.c @@ -67,7 +67,7 @@ void __init setup_clear_cpu_cap(unsigned __builtin_return_address(0), cap); __clear_bit(cap, boot_cpu_data.x86_capability); - dfs = x86_cpuid_lookup_deep_deps(cap); + dfs = x86_cpu_policy_lookup_deep_deps(cap); if (!dfs) return; --- a/xen/include/xen/lib/x86/cpu-policy.h +++ b/xen/include/xen/lib/x86/cpu-policy.h @@ -374,15 +374,20 @@ void x86_cpu_policy_to_featureset(const void x86_cpu_featureset_to_policy(const uint32_t fs[FEATURESET_NR_ENTRIES], struct cpu_policy *p); -const uint32_t *x86_cpuid_lookup_deep_deps(uint32_t feature); +/** + * For a specific feature, look up the dependent features. Returns NULL if + * this feature has no dependencies. Otherwise return a featureset of + * dependent features, which has been recursively flattened. + */ +const uint32_t *x86_cpu_policy_lookup_deep_deps(uint32_t feature); /** - * Fill a CPUID policy using the native CPUID instruction. + * Fill CPU policy using the native CPUID/RDMSR instruction. * * No sanitisation is performed. Values may be influenced by a hypervisor or * from masking/faulting configuration. */ -void x86_cpuid_policy_fill_native(struct cpuid_policy *p); +void x86_cpu_policy_fill_native(struct cpu_policy *p); #ifdef __XEN__ #include <public/arch-x86/xen.h> @@ -395,9 +400,10 @@ typedef xen_msr_entry_t msr_entry_buffer #endif /** - * Serialise a cpuid_policy object into an array of cpuid leaves. + * Serialise the CPUID leaves of a cpu_policy object into an array of cpuid + * leaves. * - * @param policy The cpuid_policy to serialise. + * @param policy The cpu_policy to serialise. * @param leaves The array of leaves to serialise into. * @param nr_entries The number of entries in 'leaves'. * @returns -errno @@ -406,13 +412,13 @@ typedef xen_msr_entry_t msr_entry_buffer * leaves array is too short. On success, nr_entries is updated with the * actual number of leaves written. */ -int x86_cpuid_copy_to_buffer(const struct cpuid_policy *policy, +int x86_cpuid_copy_to_buffer(const struct cpu_policy *policy, cpuid_leaf_buffer_t leaves, uint32_t *nr_entries); /** - * Serialise an msr_policy object into an array. + * Serialise the MSRs of a cpu_policy object into an array. * - * @param policy The msr_policy to serialise. + * @param policy The cpu_policy to serialise. * @param msrs The array of msrs to serialise into. * @param nr_entries The number of entries in 'msrs'. * @returns -errno @@ -421,7 +427,7 @@ int x86_cpuid_copy_to_buffer(const struc * buffer array is too short. On success, nr_entries is updated with the * actual number of msrs written. */ -int x86_msr_copy_to_buffer(const struct msr_policy *policy, +int x86_msr_copy_to_buffer(const struct cpu_policy *policy, msr_entry_buffer_t msrs, uint32_t *nr_entries); #endif /* !XEN_LIB_X86_POLICIES_H */ --- a/xen/lib/x86/cpuid.c +++ b/xen/lib/x86/cpuid.c @@ -44,7 +44,7 @@ void x86_cpu_featureset_to_policy( p->feat._7d1 = fs[FEATURESET_7d1]; } -void x86_cpuid_policy_fill_native(struct cpuid_policy *p) +void x86_cpu_policy_fill_native(struct cpu_policy *p) { unsigned int i; @@ -153,7 +153,7 @@ void x86_cpuid_policy_fill_native(struct cpuid_leaf(0x80000000 + i, &p->extd.raw[i]); } -const uint32_t *x86_cpuid_lookup_deep_deps(uint32_t feature) +const uint32_t *x86_cpu_policy_lookup_deep_deps(uint32_t feature) { static const uint32_t deep_features[] = INIT_DEEP_FEATURES; static const struct { @@ -208,7 +208,7 @@ static int copy_leaf_to_buffer(uint32_t return 0; } -int x86_cpuid_copy_to_buffer(const struct cpuid_policy *p, +int x86_cpuid_copy_to_buffer(const struct cpu_policy *p, cpuid_leaf_buffer_t leaves, uint32_t *nr_entries_p) { const uint32_t nr_entries = *nr_entries_p; --- a/xen/lib/x86/msr.c +++ b/xen/lib/x86/msr.c @@ -23,7 +23,7 @@ static int copy_msr_to_buffer(uint32_t i return 0; } -int x86_msr_copy_to_buffer(const struct msr_policy *p, +int x86_msr_copy_to_buffer(const struct cpu_policy *p, msr_entry_buffer_t msrs, uint32_t *nr_entries_p) { const uint32_t nr_entries = *nr_entries_p;
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