File target-i386-add-missing-bits-to-CR4_RESE.patch of Package qemu

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File target-i386-add-missing-bits-to-CR4_RESE.patch of Package qemu (Revision bf70aab340502a8abeb24ef35a85b752)

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From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
Date: Tue, 31 Aug 2021 18:50:33 +0100
Subject: target/i386: add missing bits to CR4_RESERVED_MASK
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Git-commit: 69e3895f9d37ca39536775b13ce63e8c291427ba

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>
Signed-off-by: Jose R. Ziviani <jziviani@suse.de>
---
 target/i386/cpu.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 6c50d3ab4f1d38b4cbaf78c84ac0..21b33fbe2e696dabe06228b20d2e 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -257,6 +257,7 @@ typedef enum X86Seg {
                 | CR4_DE_MASK | CR4_PSE_MASK | CR4_PAE_MASK \
                 | CR4_MCE_MASK | CR4_PGE_MASK | CR4_PCE_MASK \
                 | CR4_OSFXSR_MASK | CR4_OSXMMEXCPT_MASK |CR4_UMIP_MASK \
+                | CR4_LA57_MASK \
                 | CR4_FSGSBASE_MASK | CR4_PCIDE_MASK | CR4_OSXSAVE_MASK \
                 | CR4_SMEP_MASK | CR4_SMAP_MASK | CR4_PKE_MASK | CR4_PKS_MASK))

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File target-i386-add-missing-bits-to-CR4_RESE.patch of Package qemu (Revision bf70aab340502a8abeb24ef35a85b752)

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