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When testing for VMLAUNCH vs. VMRESUME, use the copy of @flags from the stack instead of first moving it to EBX, and then propagating VMX_RUN_VMRESUME to RFLAGS.CF (because RBX is clobbered with the guest value prior to the conditional branch to VMLAUNCH). Stashing information in RFLAGS is gross, especially with the writer and reader being bifurcated by yet more gnarly assembly code. Opportunistically drop the SHIFT macros as they existed purely to allow the VM-Enter flow to use Bit Test. Suggested-by: Borislav Petkov <bp@alien8.de> Acked-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Brendan Jackman <jackmanb@google.com> Link: https://patch.msgid.link/20251113233746.1703361-2-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
10 lines
272 B
C
10 lines
272 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __KVM_X86_VMX_RUN_FLAGS_H
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#define __KVM_X86_VMX_RUN_FLAGS_H
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#define VMX_RUN_VMRESUME BIT(0)
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#define VMX_RUN_SAVE_SPEC_CTRL BIT(1)
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#define VMX_RUN_CLEAR_CPU_BUFFERS_FOR_MMIO BIT(2)
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#endif /* __KVM_X86_VMX_RUN_FLAGS_H */
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