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SUSE:SLE-15-SP2:Update
xen.14764
5e7dd83b-libx86-CPUID-fix-not-just-leaf-7.patch
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File 5e7dd83b-libx86-CPUID-fix-not-just-leaf-7.patch of Package xen.14764
# Commit eb0bad81fceb3e81df5f73441771b49b732edf56 # Date 2020-03-27 11:40:59 +0100 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> libx86/CPUID: fix (not just) leaf 7 processing x86_cpuid_policy_fill_native() should, as it did originally, iterate over all subleaves here as well as over all main leaves. Switch to using a "<= MIN()"-based approach similar to that used in x86_cpuid_copy_to_buffer(). Also follow this for the extended main leaves then. Fixes: 1bd2b750537b ("libx86: Fix 32bit stubdom build of x86_cpuid_policy_fill_native()") Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/xen/lib/x86/cpuid.c +++ b/xen/lib/x86/cpuid.c @@ -7,8 +7,8 @@ void x86_cpuid_policy_fill_native(struct unsigned int i; cpuid_leaf(0, &p->basic.raw[0]); - for ( i = 1; i < min_t(unsigned int, ARRAY_SIZE(p->basic.raw), - p->basic.max_leaf); ++i ) + for ( i = 1; i <= MIN(p->basic.max_leaf, + ARRAY_SIZE(p->basic.raw) - 1); ++i ) { switch ( i ) { @@ -52,8 +52,8 @@ void x86_cpuid_policy_fill_native(struct { cpuid_count_leaf(7, 0, &p->feat.raw[0]); - for ( i = 1; i < min_t(unsigned int, ARRAY_SIZE(p->feat.raw), - p->feat.max_subleaf); ++i ) + for ( i = 1; i <= MIN(p->feat.max_subleaf, + ARRAY_SIZE(p->feat.raw) - 1); ++i ) cpuid_count_leaf(7, i, &p->feat.raw[i]); } @@ -106,8 +106,8 @@ void x86_cpuid_policy_fill_native(struct /* Extended leaves. */ cpuid_leaf(0x80000000, &p->extd.raw[0]); - for ( i = 1; i < min_t(unsigned int, ARRAY_SIZE(p->extd.raw), - p->extd.max_leaf + 1 - 0x80000000); ++i ) + for ( i = 1; i <= MIN(p->extd.max_leaf & 0xffffU, + ARRAY_SIZE(p->extd.raw) - 1); ++i ) cpuid_leaf(0x80000000 + i, &p->extd.raw[i]); }
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