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mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.onmicrosoft.com; s=selector2-citrix-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=qDZhAJDB/rsUQo+Z4e8pQdhxsoyKmVpWA1PSI58wKuU=; b=cFxUb1fIRubkaC1putWAOfaK/NMLjcrZg3d5UyZ0wcVTgE+Sk7cUjf2xSOFmimilNkJAeOO9IeqAqbbq4KdDYtT/2IMN7bxUdzDdUq8KTG6SKOCA+wOa9pWI8W9peOSbB5h167Hs/H1rjlzQjjshwpe3o9W8+Xp0GeoavMlFHQ8= From: Roger Pau Monne To: CC: Andrew Cooper , Roger Pau Monne , Ian Jackson , Wei Liu Subject: [PATCH v2 14/21] libs/guest: introduce helper to check cpu policy compatibility Date: Tue, 13 Apr 2021 16:01:32 +0200 Message-ID: <20210413140140.73690-15-roger.pau@citrix.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210413140140.73690-1-roger.pau@citrix.com> References: <20210413140140.73690-1-roger.pau@citrix.com> Content-Type: text/plain; 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This requires building policy.c from libx86 on user land also. No user of the interface introduced. Signed-off-by: Roger Pau Monné --- Changes since v1: - Initialize err. - Explicitly name parameters as host and guest. --- tools/include/xenctrl.h | 4 ++++ tools/libs/guest/Makefile | 2 +- tools/libs/guest/xg_cpuid_x86.c | 19 +++++++++++++++++++ 3 files changed, 24 insertions(+), 1 deletion(-) diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h index 9a6d1b126d8..5f699c09509 100644 --- a/tools/include/xenctrl.h +++ b/tools/include/xenctrl.h @@ -2619,6 +2619,10 @@ int xc_cpu_policy_update_cpuid(xc_interface *xch, xc_cpu_policy_t policy, int xc_cpu_policy_update_msrs(xc_interface *xch, xc_cpu_policy_t policy, const xen_msr_entry_t *msrs, uint32_t nr); +/* Compatibility calculations. */ +bool xc_cpu_policy_is_compatible(xc_interface *xch, const xc_cpu_policy_t host, + const xc_cpu_policy_t guest); + int xc_get_cpu_levelling_caps(xc_interface *xch, uint32_t *caps); int xc_get_cpu_featureset(xc_interface *xch, uint32_t index, uint32_t *nr_features, uint32_t *featureset); diff --git a/tools/libs/guest/Makefile b/tools/libs/guest/Makefile index 604e1695d6a..6d2a1d5bbc0 100644 --- a/tools/libs/guest/Makefile +++ b/tools/libs/guest/Makefile @@ -40,7 +40,7 @@ $(patsubst %.c,%.opic,$(ELF_SRCS-y)): CFLAGS += -Wno-pointer-sign ifeq ($(CONFIG_X86),y) # Add libx86 to the build vpath %.c ../../../xen/lib/x86 -SRCS-y += cpuid.c msr.c +SRCS-y += cpuid.c msr.c policy.c endif # new domain builder diff --git a/tools/libs/guest/xg_cpuid_x86.c b/tools/libs/guest/xg_cpuid_x86.c index 26b09322dfa..bd2f31dd87f 100644 --- a/tools/libs/guest/xg_cpuid_x86.c +++ b/tools/libs/guest/xg_cpuid_x86.c @@ -925,3 +925,22 @@ int xc_cpu_policy_update_msrs(xc_interface *xch, xc_cpu_policy_t policy, return rc; } + +bool xc_cpu_policy_is_compatible(xc_interface *xch, const xc_cpu_policy_t host, + const xc_cpu_policy_t guest) +{ + struct cpu_policy_errors err = INIT_CPU_POLICY_ERRORS; + struct cpu_policy h = { &host->cpuid, &host->msr }; + struct cpu_policy g = { &guest->cpuid, &guest->msr }; + int rc = x86_cpu_policies_are_compatible(&h, &g, &err); + + if ( !rc ) + return true; + + if ( err.leaf != -1 ) + ERROR("Leaf %#x subleaf %#x is not compatible", err.leaf, err.subleaf); + if ( err.msr != -1 ) + ERROR("MSR index %#x is not compatible", err.msr); + + return false; +} -- 2.30.1