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openSUSE:Step:15-SP2
xen.31135
xsa435-0-27.patch
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File xsa435-0-27.patch of Package xen.31135
From 4f20f596ce9bd95bde077a1ae0d7e07d20a5f6be Mon Sep 17 00:00:00 2001 From: Andrew Cooper <andrew.cooper3@citrix.com> Date: Mon, 3 Apr 2023 17:48:43 +0100 Subject: x86/boot: Move MSR policy initialisation logic into cpu-policy.c Switch to the newer cpu_policy nomenclature. No practical change. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Jan Beulich <jbeulich@suse.com> --- a/xen/arch/x86/cpu-policy.c +++ b/xen/arch/x86/cpu-policy.c @@ -14,6 +14,69 @@ struct cpu_policy __read_mostly hos struct cpu_policy __read_mostly pv_max_cpu_policy; struct cpu_policy __read_mostly hvm_max_cpu_policy; +static void __init calculate_raw_policy(void) +{ + struct cpu_policy *p = &raw_cpu_policy; + + /* 0x000000ce MSR_INTEL_PLATFORM_INFO */ + /* Was already added by probe_cpuid_faulting() */ + + if ( cpu_has_arch_caps ) + rdmsrl(MSR_ARCH_CAPABILITIES, p->arch_caps.raw); +} + +static void __init calculate_host_policy(void) +{ + struct cpu_policy *p = &host_cpu_policy; + + *p = raw_cpu_policy; + + /* 0x000000ce MSR_INTEL_PLATFORM_INFO */ + /* probe_cpuid_faulting() sanity checks presence of MISC_FEATURES_ENABLES */ + p->platform_info.cpuid_faulting = cpu_has_cpuid_faulting; + + /* Temporary, until we have known_features[] for feature bits in MSRs. */ + p->arch_caps.raw &= + (ARCH_CAPS_RDCL_NO | ARCH_CAPS_IBRS_ALL | ARCH_CAPS_RSBA | + ARCH_CAPS_SKIP_L1DFL | ARCH_CAPS_SSB_NO | ARCH_CAPS_MDS_NO | + ARCH_CAPS_IF_PSCHANGE_MC_NO | ARCH_CAPS_TSX_CTRL | ARCH_CAPS_TAA_NO | + ARCH_CAPS_SBDR_SSDP_NO | ARCH_CAPS_FBSDP_NO | ARCH_CAPS_PSDP_NO | + ARCH_CAPS_FB_CLEAR | ARCH_CAPS_RRSBA | ARCH_CAPS_BHI_NO | + ARCH_CAPS_PBRSB_NO); +} + +static void __init calculate_pv_max_policy(void) +{ + struct cpu_policy *p = &pv_max_cpu_policy; + + *p = host_cpu_policy; + + p->arch_caps.raw = 0; /* Not supported yet. */ +} + +static void __init calculate_hvm_max_policy(void) +{ + struct cpu_policy *p = &hvm_max_cpu_policy; + + *p = host_cpu_policy; + + /* It's always possible to emulate CPUID faulting for HVM guests */ + p->platform_info.cpuid_faulting = true; + + p->arch_caps.raw = 0; /* Not supported yet. */ +} + +void __init init_guest_cpu_policies(void) +{ + calculate_raw_policy(); + calculate_host_policy(); + + calculate_pv_max_policy(); + + if ( hvm_enabled ) + calculate_hvm_max_policy(); +} + int init_domain_cpu_policy(struct domain *d) { struct cpu_policy *p = --- a/xen/arch/x86/msr.c +++ b/xen/arch/x86/msr.c @@ -34,69 +34,6 @@ DEFINE_PER_CPU(uint32_t, tsc_aux); struct vcpu_msrs __read_mostly hvm_max_vcpu_msrs, __read_mostly pv_max_vcpu_msrs; -static void __init calculate_raw_policy(void) -{ - struct msr_policy *mp = &raw_cpu_policy; - - /* 0x000000ce MSR_INTEL_PLATFORM_INFO */ - /* Was already added by probe_cpuid_faulting() */ - - if ( cpu_has_arch_caps ) - rdmsrl(MSR_ARCH_CAPABILITIES, mp->arch_caps.raw); -} - -static void __init calculate_host_policy(void) -{ - struct msr_policy *mp = &host_cpu_policy; - - *mp = raw_cpu_policy; - - /* 0x000000ce MSR_INTEL_PLATFORM_INFO */ - /* probe_cpuid_faulting() sanity checks presence of MISC_FEATURES_ENABLES */ - mp->platform_info.cpuid_faulting = cpu_has_cpuid_faulting; - - /* Temporary, until we have known_features[] for feature bits in MSRs. */ - mp->arch_caps.raw &= - (ARCH_CAPS_RDCL_NO | ARCH_CAPS_IBRS_ALL | ARCH_CAPS_RSBA | - ARCH_CAPS_SKIP_L1DFL | ARCH_CAPS_SSB_NO | ARCH_CAPS_MDS_NO | - ARCH_CAPS_IF_PSCHANGE_MC_NO | ARCH_CAPS_TSX_CTRL | ARCH_CAPS_TAA_NO | - ARCH_CAPS_SBDR_SSDP_NO | ARCH_CAPS_FBSDP_NO | ARCH_CAPS_PSDP_NO | - ARCH_CAPS_FB_CLEAR | ARCH_CAPS_RRSBA | ARCH_CAPS_BHI_NO | - ARCH_CAPS_PBRSB_NO); -} - -static void __init calculate_hvm_max_policy(void) -{ - struct msr_policy *mp = &hvm_max_cpu_policy; - - if ( !hvm_enabled ) - return; - - *mp = host_cpu_policy; - - /* It's always possible to emulate CPUID faulting for HVM guests */ - mp->platform_info.cpuid_faulting = true; - - mp->arch_caps.raw = 0; /* Not supported yet. */ -} - -static void __init calculate_pv_max_policy(void) -{ - struct msr_policy *mp = &pv_max_cpu_policy; - - *mp = host_cpu_policy; - - mp->arch_caps.raw = 0; /* Not supported yet. */ -} - -void __init init_guest_msr_policy(void) -{ - calculate_raw_policy(); - calculate_host_policy(); - calculate_hvm_max_policy(); - calculate_pv_max_policy(); -} - int init_vcpu_msr_policy(struct vcpu *v) { struct domain *d = v->domain; --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -48,6 +48,7 @@ #include <asm/nmi.h> #include <asm/alternative.h> #include <asm/mc146818rtc.h> +#include <asm/cpu-policy.h> #include <asm/cpuid.h> #include <asm/spec_ctrl.h> #include <asm/guest.h> @@ -1736,7 +1737,7 @@ void __init noreturn __start_xen(unsigne panic("Could not protect TXT memory regions\n"); init_guest_cpuid(); - init_guest_msr_policy(); + init_guest_cpu_policies(); if ( opt_dom0_pvh ) { --- a/xen/include/asm-x86/cpu-policy.h +++ b/xen/include/asm-x86/cpu-policy.h @@ -10,6 +10,9 @@ extern struct cpu_policy host_cpu_pol extern struct cpu_policy pv_max_cpu_policy; extern struct cpu_policy hvm_max_cpu_policy; +/* Initialise the guest cpu_policy objects. */ +void init_guest_cpu_policies(void); + /* Allocate and initialise a CPU policy suitable for the domain. */ int init_domain_cpu_policy(struct domain *d); --- a/xen/include/asm-x86/msr.h +++ b/xen/include/asm-x86/msr.h @@ -316,7 +316,6 @@ struct vcpu_msrs uint32_t dr_mask[4]; }; -void init_guest_msr_policy(void); int init_vcpu_msr_policy(struct vcpu *v); /*
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