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authorDaniel P. Berrangé <berrange@redhat.com>2021-08-31 18:50:33 +0100
committerMichael Roth <michael.roth@amd.com>2021-12-15 07:13:18 -0600
commite88636b4d46b91e130ae715b8d8b90f62e414428 (patch)
tree762664a76ec6687d0afd19aecbeea0f48c21d7e1 /configs
parent34833f361b1407ad7b4f02ed5eb852e76ab032e4 (diff)
target/i386: add missing bits to CR4_RESERVED_MASK
Booting Fedora kernels with -cpu max hangs very early in boot. Disabling the la57 CPUID bit fixes the problem. git bisect traced the regression to commit 213ff024a2f92020290296cb9dc29c2af3d4a221 (HEAD, refs/bisect/bad) Author: Lara Lazier <laramglazier@gmail.com> Date: Wed Jul 21 17:26:50 2021 +0200 target/i386: Added consistency checks for CR4 All MBZ bits in CR4 must be zero. (APM2 15.5) Added reserved bitmask and added checks in both helper_vmrun and helper_write_crN. Signed-off-by: Lara Lazier <laramglazier@gmail.com> Message-Id: <20210721152651.14683-2-laramglazier@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> In this commit CR4_RESERVED_MASK is missing CR4_LA57_MASK and two others. Adding this lets Fedora kernels boot once again. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Tested-by: Richard W.M. Jones <rjones@redhat.com> Message-Id: <20210831175033.175584-1-berrange@redhat.com> [Removed VMXE/SMXE, matching the commit message. - Paolo] Fixes: 213ff024a2 ("target/i386: Added consistency checks for CR4", 2021-07-22) Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> (cherry picked from commit 69e3895f9d37ca39536775b13ce63e8c291427ba) Signed-off-by: Michael Roth <michael.roth@amd.com>
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