[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen stable-4.17] x86: Drop struct old_cpu_policy
commit 70b38074291f3fad1521cf650744eae3f490cab5 Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> AuthorDate: Wed Mar 29 12:01:33 2023 +0100 Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> CommitDate: Tue Aug 8 16:02:17 2023 +0100 x86: Drop struct old_cpu_policy With all the complicated callers of x86_cpu_policies_are_compatible() updated to use a single cpu_policy object, we can drop the final user of struct old_cpu_policy. Update x86_cpu_policies_are_compatible() to take (new) cpu_policy pointers, reducing the amount of internal pointer chasing, and update all callers to pass their cpu_policy objects directly. Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> (cherry picked from commit 66c5c99656314451ff9520f91cff5bb39fee9fed) --- tools/libs/guest/xg_cpuid_x86.c | 4 +-- tools/tests/cpu-policy/test-cpu-policy.c | 50 ++++++++++---------------------- xen/arch/x86/domctl.c | 7 ++--- xen/include/xen/lib/x86/cpu-policy.h | 12 ++------ xen/lib/x86/policy.c | 12 ++++---- 5 files changed, 27 insertions(+), 58 deletions(-) diff --git a/tools/libs/guest/xg_cpuid_x86.c b/tools/libs/guest/xg_cpuid_x86.c index 5133d59d8a..3be9c5e855 100644 --- a/tools/libs/guest/xg_cpuid_x86.c +++ b/tools/libs/guest/xg_cpuid_x86.c @@ -868,9 +868,7 @@ bool xc_cpu_policy_is_compatible(xc_interface *xch, xc_cpu_policy_t *host, xc_cpu_policy_t *guest) { struct cpu_policy_errors err = INIT_CPU_POLICY_ERRORS; - struct old_cpu_policy h = { &host->policy, &host->policy }; - struct old_cpu_policy g = { &guest->policy, &guest->policy }; - int rc = x86_cpu_policies_are_compatible(&h, &g, &err); + int rc = x86_cpu_policies_are_compatible(&host->policy, &guest->policy, &err); if ( !rc ) return true; diff --git a/tools/tests/cpu-policy/test-cpu-policy.c b/tools/tests/cpu-policy/test-cpu-policy.c index 8a223fddb3..4f3d09f1b7 100644 --- a/tools/tests/cpu-policy/test-cpu-policy.c +++ b/tools/tests/cpu-policy/test-cpu-policy.c @@ -98,7 +98,7 @@ static bool msrs_are_sorted(const xen_msr_entry_t *entries, unsigned int nr) static void test_cpuid_current(void) { - struct cpuid_policy p; + struct cpu_policy p; xen_cpuid_leaf_t leaves[CPUID_MAX_SERIALISED_LEAVES]; unsigned int nr = ARRAY_SIZE(leaves); int rc; @@ -118,7 +118,7 @@ static void test_cpuid_current(void) static void test_cpuid_serialise_success(void) { static const struct test { - struct cpuid_policy p; + struct cpu_policy p; const char *name; unsigned int nr_leaves; } tests[] = { @@ -242,7 +242,7 @@ static void test_cpuid_serialise_success(void) static void test_msr_serialise_success(void) { static const struct test { - struct msr_policy p; + struct cpu_policy p; const char *name; unsigned int nr_msrs; } tests[] = { @@ -430,7 +430,7 @@ static void test_cpuid_out_of_range_clearing(void) static const struct test { const char *name; unsigned int nr_markers; - struct cpuid_policy p; + struct cpu_policy p; } tests[] = { { .name = "basic", @@ -550,7 +550,7 @@ static void test_cpuid_out_of_range_clearing(void) for ( size_t i = 0; i < ARRAY_SIZE(tests); ++i ) { const struct test *t = &tests[i]; - struct cpuid_policy *p = memdup(&t->p); + struct cpu_policy *p = memdup(&t->p); void *ptr; unsigned int nr_markers; @@ -574,23 +574,20 @@ static void test_is_compatible_success(void) { static struct test { const char *name; - struct cpuid_policy host_cpuid; - struct cpuid_policy guest_cpuid; - struct msr_policy host_msr; - struct msr_policy guest_msr; + struct cpu_policy host, guest; } tests[] = { { .name = "Host CPUID faulting, Guest not", - .host_msr = { + .host = { .platform_info.cpuid_faulting = true, }, }, { .name = "Host CPUID faulting, Guest wanted", - .host_msr = { + .host = { .platform_info.cpuid_faulting = true, }, - .guest_msr = { + .guest = { .platform_info.cpuid_faulting = true, }, }, @@ -602,15 +599,8 @@ static void test_is_compatible_success(void) for ( size_t i = 0; i < ARRAY_SIZE(tests); ++i ) { struct test *t = &tests[i]; - struct old_cpu_policy sys = { - &t->host_cpuid, - &t->host_msr, - }, new = { - &t->guest_cpuid, - &t->guest_msr, - }; struct cpu_policy_errors e; - int res = x86_cpu_policies_are_compatible(&sys, &new, &e); + int res = x86_cpu_policies_are_compatible(&t->host, &t->guest, &e); /* Check the expected error output. */ if ( res != 0 || memcmp(&no_errors, &e, sizeof(no_errors)) ) @@ -624,25 +614,22 @@ static void test_is_compatible_failure(void) { static struct test { const char *name; - struct cpuid_policy host_cpuid; - struct cpuid_policy guest_cpuid; - struct msr_policy host_msr; - struct msr_policy guest_msr; + struct cpu_policy host, guest; struct cpu_policy_errors e; } tests[] = { { .name = "Host basic.max_leaf out of range", - .guest_cpuid.basic.max_leaf = 1, + .guest.basic.max_leaf = 1, .e = { 0, -1, -1 }, }, { .name = "Host extd.max_leaf out of range", - .guest_cpuid.extd.max_leaf = 1, + .guest.extd.max_leaf = 1, .e = { 0x80000000, -1, -1 }, }, { .name = "Host no CPUID faulting, Guest wanted", - .guest_msr = { + .guest = { .platform_info.cpuid_faulting = true, }, .e = { -1, -1, 0xce }, @@ -654,15 +641,8 @@ static void test_is_compatible_failure(void) for ( size_t i = 0; i < ARRAY_SIZE(tests); ++i ) { struct test *t = &tests[i]; - struct old_cpu_policy sys = { - &t->host_cpuid, - &t->host_msr, - }, new = { - &t->guest_cpuid, - &t->guest_msr, - }; struct cpu_policy_errors e; - int res = x86_cpu_policies_are_compatible(&sys, &new, &e); + int res = x86_cpu_policies_are_compatible(&t->host, &t->guest, &e); /* Check the expected error output. */ if ( res == 0 || memcmp(&t->e, &e, sizeof(t->e)) ) diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c index 857d0abe32..6d15d0c29c 100644 --- a/xen/arch/x86/domctl.c +++ b/xen/arch/x86/domctl.c @@ -42,10 +42,9 @@ static int update_domain_cpu_policy(struct domain *d, xen_domctl_cpu_policy_t *xdpc) { struct cpu_policy *new; - struct cpu_policy *sys = is_pv_domain(d) + const struct cpu_policy *sys = is_pv_domain(d) ? (IS_ENABLED(CONFIG_PV) ? &pv_max_cpu_policy : NULL) : (IS_ENABLED(CONFIG_HVM) ? &hvm_max_cpu_policy : NULL); - struct old_cpu_policy old_sys = { sys, sys }, old_new; struct cpu_policy_errors err = INIT_CPU_POLICY_ERRORS; int ret = -ENOMEM; @@ -59,8 +58,6 @@ static int update_domain_cpu_policy(struct domain *d, if ( !(new = xmemdup(d->arch.cpu_policy)) ) goto out; - old_new = (struct old_cpu_policy){ new, new }; - /* Merge the toolstack provided data. */ if ( (ret = x86_cpuid_copy_from_buffer( new, xdpc->leaves, xdpc->nr_leaves, @@ -73,7 +70,7 @@ static int update_domain_cpu_policy(struct domain *d, x86_cpuid_policy_clear_out_of_range_leaves(new); /* Audit the combined dataset. */ - ret = x86_cpu_policies_are_compatible(&old_sys, &old_new, &err); + ret = x86_cpu_policies_are_compatible(sys, new, &err); if ( ret ) goto out; diff --git a/xen/include/xen/lib/x86/cpu-policy.h b/xen/include/xen/lib/x86/cpu-policy.h index 53fffca552..8b27a0725b 100644 --- a/xen/include/xen/lib/x86/cpu-policy.h +++ b/xen/include/xen/lib/x86/cpu-policy.h @@ -379,12 +379,6 @@ struct cpu_policy #define cpuid_policy cpu_policy #define msr_policy cpu_policy -struct old_cpu_policy -{ - struct cpuid_policy *cpuid; - struct msr_policy *msr; -}; - struct cpu_policy_errors { uint32_t leaf, subleaf; @@ -559,7 +553,7 @@ int x86_msr_copy_from_buffer(struct msr_policy *policy, const msr_entry_buffer_t msrs, uint32_t nr_entries, uint32_t *err_msr); -/* +/** * Calculate whether two policies are compatible. * * i.e. Can a VM configured with @guest run on a CPU supporting @host. @@ -573,8 +567,8 @@ int x86_msr_copy_from_buffer(struct msr_policy *policy, * incompatibility is detected, the optional err pointer may identify the * problematic leaf/subleaf and/or MSR. */ -int x86_cpu_policies_are_compatible(const struct old_cpu_policy *host, - const struct old_cpu_policy *guest, +int x86_cpu_policies_are_compatible(const struct cpu_policy *host, + const struct cpu_policy *guest, struct cpu_policy_errors *err); #endif /* !XEN_LIB_X86_POLICIES_H */ diff --git a/xen/lib/x86/policy.c b/xen/lib/x86/policy.c index 2975711d7c..a9c60000af 100644 --- a/xen/lib/x86/policy.c +++ b/xen/lib/x86/policy.c @@ -2,8 +2,8 @@ #include <xen/lib/x86/cpu-policy.h> -int x86_cpu_policies_are_compatible(const struct old_cpu_policy *host, - const struct old_cpu_policy *guest, +int x86_cpu_policies_are_compatible(const struct cpu_policy *host, + const struct cpu_policy *guest, struct cpu_policy_errors *err) { struct cpu_policy_errors e = INIT_CPU_POLICY_ERRORS; @@ -15,18 +15,18 @@ int x86_cpu_policies_are_compatible(const struct old_cpu_policy *host, #define FAIL_MSR(m) \ do { e.msr = (m); goto out; } while ( 0 ) - if ( guest->cpuid->basic.max_leaf > host->cpuid->basic.max_leaf ) + if ( guest->basic.max_leaf > host->basic.max_leaf ) FAIL_CPUID(0, NA); - if ( guest->cpuid->feat.max_subleaf > host->cpuid->feat.max_subleaf ) + if ( guest->feat.max_subleaf > host->feat.max_subleaf ) FAIL_CPUID(7, 0); - if ( guest->cpuid->extd.max_leaf > host->cpuid->extd.max_leaf ) + if ( guest->extd.max_leaf > host->extd.max_leaf ) FAIL_CPUID(0x80000000, NA); /* TODO: Audit more CPUID data. */ - if ( ~host->msr->platform_info.raw & guest->msr->platform_info.raw ) + if ( ~host->platform_info.raw & guest->platform_info.raw ) FAIL_MSR(MSR_INTEL_PLATFORM_INFO); #undef FAIL_MSR -- generated by git-patchbot for /home/xen/git/xen.git#stable-4.17
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