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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-06 16:43:42 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-06 16:43:42 -0400 |
| commit | 92f94219789dee8b16fec070c540d835f303a64f (patch) | |
| tree | caa4e17fe57c4b2150bf3e9f483249db450ce72f /kernel | |
| parent | 0a0133d62da40a30bb97e9253ff25e80728185bc (diff) | |
| download | open-iov-92f94219789dee8b16fec070c540d835f303a64f.tar.gz open-iov-92f94219789dee8b16fec070c540d835f303a64f.zip | |
vgsp: preserve the pointer page offset in the shadow QMD rewrite (program +0x800)
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/gsp_phys_booter.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/kernel/gsp_phys_booter.c b/kernel/gsp_phys_booter.c index 159751b..a4d9718 100644 --- a/kernel/gsp_phys_booter.c +++ b/kernel/gsp_phys_booter.c @@ -14548,8 +14548,17 @@ int gsp_phys_backend_guest_gr_submit(const struct gsp_phys_gr_submit *req, n_shadow), &sh_va); if (!ret) { - u64 ptr_va = sh_va + - (pg->guest_va & + /* + * Preserve the original pointer's page + * offset: pg->guest_va is page-based, + * but the QMD pair (still the guest's + * value here) carries the exact entry + * offset (e.g. program +0x800). Without + * it the engine would fetch the wrong + * slot of the copied page. + */ + u64 ptr_va = sh_va | + ((u64)qmd[pg->qmd_word] & (GSP_PHYS_PAGE_SIZE - 1)); n_shadow++; |