diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-06-14 23:33:28 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-20 06:21:30 -0400 |
| commit | 70e41c31bc7776b262cd9f524df3dfc2b5869a0a (patch) | |
| tree | ff90275eeb748d7f0c66c1c850fcb22f63958850 | |
| parent | f7384b8866b0b07f249130aa8b63135687626c5c (diff) | |
| download | lwn-70e41c31bc7776b262cd9f524df3dfc2b5869a0a.tar.gz lwn-70e41c31bc7776b262cd9f524df3dfc2b5869a0a.zip | |
KVM: x86/mmu: Use common logic for computing the 32/64-bit base PA mask
Use common logic for computing PT_BASE_ADDR_MASK for 32-bit, 64-bit, and
EPT paging. Both PAGE_MASK and the new-common logic are supsersets of
what is actually needed for 32-bit paging. PAGE_MASK sets bits 63:12 and
the former GUEST_PT64_BASE_ADDR_MASK sets bits 51:12, so regardless of
which value is used, the result will always be bits 31:12.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220614233328.3896033-9-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/mmu/paging.h | 9 | ||||
| -rw-r--r-- | arch/x86/kvm/mmu/paging_tmpl.h | 4 |
3 files changed, 1 insertions, 14 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 75f9e344812e..2dcedf04ef85 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -53,8 +53,6 @@ #include <asm/kvm_page_track.h> #include "trace.h" -#include "paging.h" - extern bool itlb_multihit_kvm_mitigation; int __read_mostly nx_huge_pages = -1; diff --git a/arch/x86/kvm/mmu/paging.h b/arch/x86/kvm/mmu/paging.h deleted file mode 100644 index 9de4976b2d46..000000000000 --- a/arch/x86/kvm/mmu/paging.h +++ /dev/null @@ -1,9 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* Shadow paging constants/helpers that don't need to be #undef'd. */ -#ifndef __KVM_X86_PAGING_H -#define __KVM_X86_PAGING_H - -#define GUEST_PT64_BASE_ADDR_MASK (((1ULL << 52) - 1) & ~(u64)(PAGE_SIZE-1)) - -#endif /* __KVM_X86_PAGING_H */ - diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h index b7424d63c706..e4655056e651 100644 --- a/arch/x86/kvm/mmu/paging_tmpl.h +++ b/arch/x86/kvm/mmu/paging_tmpl.h @@ -25,7 +25,6 @@ #define pt_element_t u64 #define guest_walker guest_walker64 #define FNAME(name) paging##64_##name - #define PT_BASE_ADDR_MASK GUEST_PT64_BASE_ADDR_MASK #define PT_LEVEL_BITS 9 #define PT_GUEST_DIRTY_SHIFT PT_DIRTY_SHIFT #define PT_GUEST_ACCESSED_SHIFT PT_ACCESSED_SHIFT @@ -39,7 +38,6 @@ #define pt_element_t u32 #define guest_walker guest_walker32 #define FNAME(name) paging##32_##name - #define PT_BASE_ADDR_MASK ((pt_element_t)PAGE_MASK) #define PT_LEVEL_BITS 10 #define PT_MAX_FULL_LEVELS 2 #define PT_GUEST_DIRTY_SHIFT PT_DIRTY_SHIFT @@ -54,7 +52,6 @@ #define pt_element_t u64 #define guest_walker guest_walkerEPT #define FNAME(name) ept_##name - #define PT_BASE_ADDR_MASK GUEST_PT64_BASE_ADDR_MASK #define PT_LEVEL_BITS 9 #define PT_GUEST_DIRTY_SHIFT 9 #define PT_GUEST_ACCESSED_SHIFT 8 @@ -65,6 +62,7 @@ #endif /* Common logic, but per-type values. These also need to be undefined. */ +#define PT_BASE_ADDR_MASK ((pt_element_t)(((1ULL << 52) - 1) & ~(u64)(PAGE_SIZE-1))) #define PT_LVL_ADDR_MASK(lvl) __PT_LVL_ADDR_MASK(PT_BASE_ADDR_MASK, lvl, PT_LEVEL_BITS) #define PT_LVL_OFFSET_MASK(lvl) __PT_LVL_OFFSET_MASK(PT_BASE_ADDR_MASK, lvl, PT_LEVEL_BITS) #define PT_INDEX(addr, lvl) __PT_INDEX(addr, lvl, PT_LEVEL_BITS) |