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Differential D31295 Diff 92697 sys/amd64/include/vmparam.h

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sys/amd64/include/vmparam.h

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#define SGROWSIZ (128UL*1024) /* amount to grow stack */ #define SGROWSIZ (128UL*1024) /* amount to grow stack */
#endif #endif
/* /*
* We provide a machine specific single page allocator through the use * We provide a machine specific single page allocator through the use
* of the direct mapped segment. This uses 2MB pages for reduced * of the direct mapped segment. This uses 2MB pages for reduced
* TLB pressure. * TLB pressure.
*/ */
#ifndef KASAN #if !defined(KASAN) && !defined(KMSAN)
#define UMA_MD_SMALL_ALLOC #define UMA_MD_SMALL_ALLOC
#endif #endif
/* /*
* The physical address space is densely populated. * The physical address space is densely populated.
*/ */
#define VM_PHYSSEG_DENSE #define VM_PHYSSEG_DENSE
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* page table indexes from pmap.h for precision. * page table indexes from pmap.h for precision.
* *
* 0x0000000000000000 - 0x00007fffffffffff user map * 0x0000000000000000 - 0x00007fffffffffff user map
* 0x0000800000000000 - 0xffff7fffffffffff does not exist (hole) * 0x0000800000000000 - 0xffff7fffffffffff does not exist (hole)
* 0xffff800000000000 - 0xffff804020100fff recursive page table (512GB slot) * 0xffff800000000000 - 0xffff804020100fff recursive page table (512GB slot)
* 0xffff804020100fff - 0xffff807fffffffff unused * 0xffff804020100fff - 0xffff807fffffffff unused
* 0xffff808000000000 - 0xffff847fffffffff large map (can be tuned up) * 0xffff808000000000 - 0xffff847fffffffff large map (can be tuned up)
* 0xffff848000000000 - 0xfffff77fffffffff unused (large map extends there) * 0xffff848000000000 - 0xfffff77fffffffff unused (large map extends there)
* 0xfffff78000000000 - 0xfffff7ffffffffff 512GB KASAN shadow map * 0xfffff60000000000 - 0xfffff7ffffffffff 2TB KMSAN origin map, optional
* 0xfffff78000000000 - 0xfffff7bfffffffff 512GB KASAN shadow map, optional
alcUnsubmitted
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Can you double check the end address here? I'm not clear on why it changed.

alc: Can you double check the end address here? I'm not clear on why it changed.
markjAuthorUnsubmitted
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I think it was a typo.

markj: I think it was a typo.
* 0xfffff80000000000 - 0xfffffbffffffffff 4TB direct map * 0xfffff80000000000 - 0xfffffbffffffffff 4TB direct map
* 0xfffffc0000000000 - 0xfffffdffffffffff unused * 0xfffffc0000000000 - 0xfffffdffffffffff 2TB KMSAN shadow map, optional
* 0xfffffe0000000000 - 0xffffffffffffffff 2TB kernel map * 0xfffffe0000000000 - 0xffffffffffffffff 2TB kernel map
kibUnsubmitted
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Are we out of static KVA allocation?

(4TB direct map is already somewhat limiting I believe, it is not impossible to build a machine with >4TB or RAM)

kib: Are we out of static KVA allocation? (4TB direct map is already somewhat limiting I believe…
markjAuthorUnsubmitted
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It seems so. We could perhaps start growing the direct map up to 6TB automatically. In this case KMSAN would have to be disabled at boot time. I'll add a static assertion to catch the case where someone tries to simultaneously configure KMSAN and increase NDMPML4E at compile time.

In the longer term I think we'd want to swap the direct map and large map in order to support machines with large RAM. Or wait until LA57 is more widely implemented in hw.

markj: It seems so. We could perhaps start growing the direct map up to 6TB automatically. In this…
* *
* Within the kernel map: * Within the kernel map:
* *
* 0xfffffe0000000000 vm_page_array * 0xfffffe0000000000 vm_page_array
* 0xffffffff80000000 KERNBASE * 0xffffffff80000000 KERNBASE
*/ */
#define VM_MIN_KERNEL_ADDRESS KV4ADDR(KPML4BASE, 0, 0, 0) #define VM_MIN_KERNEL_ADDRESS KV4ADDR(KPML4BASE, 0, 0, 0)
#define VM_MAX_KERNEL_ADDRESS KV4ADDR(KPML4BASE + NKPML4E - 1, \ #define VM_MAX_KERNEL_ADDRESS KV4ADDR(KPML4BASE + NKPML4E - 1, \
NPDPEPG-1, NPDEPG-1, NPTEPG-1) NPDPEPG-1, NPDEPG-1, NPTEPG-1)
#define DMAP_MIN_ADDRESS KV4ADDR(DMPML4I, 0, 0, 0) #define DMAP_MIN_ADDRESS KV4ADDR(DMPML4I, 0, 0, 0)
#define DMAP_MAX_ADDRESS KV4ADDR(DMPML4I + NDMPML4E, 0, 0, 0) #define DMAP_MAX_ADDRESS KV4ADDR(DMPML4I + NDMPML4E, 0, 0, 0)
#define KASAN_MIN_ADDRESS KV4ADDR(KASANPML4I, 0, 0, 0) #define KASAN_MIN_ADDRESS KV4ADDR(KASANPML4I, 0, 0, 0)
#define KASAN_MAX_ADDRESS KV4ADDR(KASANPML4I + NKASANPML4E, 0, 0, 0) #define KASAN_MAX_ADDRESS KV4ADDR(KASANPML4I + NKASANPML4E, 0, 0, 0)
#define KMSAN_SHAD_MIN_ADDRESS KV4ADDR(KMSANSHADPML4I, 0, 0, 0)
#define KMSAN_SHAD_MAX_ADDRESS KV4ADDR(KMSANSHADPML4I + NKMSANSHADPML4E, \
0, 0, 0)
#define KMSAN_ORIG_MIN_ADDRESS KV4ADDR(KMSANORIGPML4I, 0, 0, 0)
#define KMSAN_ORIG_MAX_ADDRESS KV4ADDR(KMSANORIGPML4I + NKMSANORIGPML4E, \
0, 0, 0)
#define LARGEMAP_MIN_ADDRESS KV4ADDR(LMSPML4I, 0, 0, 0) #define LARGEMAP_MIN_ADDRESS KV4ADDR(LMSPML4I, 0, 0, 0)
#define LARGEMAP_MAX_ADDRESS KV4ADDR(LMEPML4I + 1, 0, 0, 0) #define LARGEMAP_MAX_ADDRESS KV4ADDR(LMEPML4I + 1, 0, 0, 0)
#define KERNBASE KV4ADDR(KPML4I, KPDPI, 0, 0) #define KERNBASE KV4ADDR(KPML4I, KPDPI, 0, 0)
#define UPT_MAX_ADDRESS KV4ADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I) #define UPT_MAX_ADDRESS KV4ADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I)
#define UPT_MIN_ADDRESS KV4ADDR(PML4PML4I, 0, 0, 0) #define UPT_MIN_ADDRESS KV4ADDR(PML4PML4I, 0, 0, 0)
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