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[PULL v4 01/43] target/i386: add missing bits to CR4_RESERVED_MASK
From: |
Paolo Bonzini |
Subject: |
[PULL v4 01/43] target/i386: add missing bits to CR4_RESERVED_MASK |
Date: |
Wed, 8 Sep 2021 12:03:44 +0200 |
From: Daniel P. Berrangé <berrange@redhat.com>
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)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 6c50d3ab4f..21b33fbe2e 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))
--
2.31.1
- [PULL v4 00/43] (Mostly) x86 changes for 2021-09-06, Paolo Bonzini, 2021/09/08
- [PULL v4 01/43] target/i386: add missing bits to CR4_RESERVED_MASK,
Paolo Bonzini <=
- [PULL v4 02/43] target/i386: VMRUN and VMLOAD canonicalizations, Paolo Bonzini, 2021/09/08
- [PULL v4 03/43] target/i386: Added VGIF feature, Paolo Bonzini, 2021/09/08
- [PULL v4 05/43] target/i386: Added VGIF V_IRQ masking capability, Paolo Bonzini, 2021/09/08
- [PULL v4 09/43] memory: Add RAM_PROTECTED flag to skip IOMMU mappings, Paolo Bonzini, 2021/09/08
- [PULL v4 06/43] target/i386: Added ignore TPR check in ctl_has_irq, Paolo Bonzini, 2021/09/08
- [PULL v4 11/43] qom: Add memory-backend-epc ObjectOptions support, Paolo Bonzini, 2021/09/08
- [PULL v4 04/43] target/i386: Moved int_ctl into CPUX86State structure, Paolo Bonzini, 2021/09/08
- [PULL v4 07/43] target/i386: Added changed priority check for VIRQ, Paolo Bonzini, 2021/09/08
- [PULL v4 08/43] target/i386: Added vVMLOAD and vVMSAVE feature, Paolo Bonzini, 2021/09/08