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According to the APM, NPT walks are treated as user accesses. In preparation for supporting NPT mappings, set the 'user' bit on NPTs by adding a mask of bits to always be set on PTEs in kvm_mmu. Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev> Link: https://patch.msgid.link/20251230230150.4150236-18-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef SELFTEST_KVM_UTIL_ARCH_H
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#define SELFTEST_KVM_UTIL_ARCH_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "kvm_util_types.h"
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#include "test_util.h"
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extern bool is_forced_emulation_enabled;
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struct pte_masks {
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uint64_t present;
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uint64_t writable;
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uint64_t user;
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uint64_t readable;
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uint64_t executable;
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uint64_t accessed;
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uint64_t dirty;
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uint64_t huge;
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uint64_t nx;
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uint64_t c;
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uint64_t s;
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uint64_t always_set;
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};
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struct kvm_mmu_arch {
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struct pte_masks pte_masks;
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};
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struct kvm_mmu;
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struct kvm_vm_arch {
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vm_vaddr_t gdt;
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vm_vaddr_t tss;
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vm_vaddr_t idt;
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uint64_t c_bit;
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uint64_t s_bit;
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int sev_fd;
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bool is_pt_protected;
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};
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static inline bool __vm_arch_has_protected_memory(struct kvm_vm_arch *arch)
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{
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return arch->c_bit || arch->s_bit;
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}
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#define vm_arch_has_protected_memory(vm) \
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__vm_arch_has_protected_memory(&(vm)->arch)
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#define vcpu_arch_put_guest(mem, __val) \
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do { \
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const typeof(mem) val = (__val); \
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\
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if (!is_forced_emulation_enabled || guest_random_bool(&guest_rng)) { \
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(mem) = val; \
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} else if (guest_random_bool(&guest_rng)) { \
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__asm__ __volatile__(KVM_FEP "mov %1, %0" \
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: "+m" (mem) \
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: "r" (val) : "memory"); \
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} else { \
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uint64_t __old = READ_ONCE(mem); \
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\
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__asm__ __volatile__(KVM_FEP LOCK_PREFIX "cmpxchg %[new], %[ptr]" \
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: [ptr] "+m" (mem), [old] "+a" (__old) \
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: [new]"r" (val) : "memory", "cc"); \
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} \
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} while (0)
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#endif // SELFTEST_KVM_UTIL_ARCH_H
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