[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH RFC 02/12] x86/np2m: add np2m_flush_eptp()
The new function finds all np2m objects with the specified eptp and flushes them. p2m_flush_table_locked() is added in order not to release the p2m lock after np2m_base check. Signed-off-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx> --- xen/arch/x86/mm/p2m.c | 34 +++++++++++++++++++++++++++++++--- xen/include/asm-x86/p2m.h | 2 ++ 2 files changed, 33 insertions(+), 3 deletions(-) diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c index b8c8bba421..bc330d8f52 100644 --- a/xen/arch/x86/mm/p2m.c +++ b/xen/arch/x86/mm/p2m.c @@ -1708,15 +1708,14 @@ p2m_getlru_nestedp2m(struct domain *d, struct p2m_domain *p2m) return p2m; } -/* Reset this p2m table to be empty */ static void -p2m_flush_table(struct p2m_domain *p2m) +p2m_flush_table_locked(struct p2m_domain *p2m) { struct page_info *top, *pg; struct domain *d = p2m->domain; mfn_t mfn; - p2m_lock(p2m); + ASSERT(p2m_locked_by_me(p2m)); /* * "Host" p2m tables can have shared entries &c that need a bit more care @@ -1756,6 +1755,14 @@ p2m_flush_table(struct p2m_domain *p2m) p2m_unlock(p2m); } +/* Reset this p2m table to be empty */ +static void +p2m_flush_table(struct p2m_domain *p2m) +{ + p2m_lock(p2m); + p2m_flush_table_locked(p2m); +} + void p2m_flush(struct vcpu *v, struct p2m_domain *p2m) { @@ -1773,6 +1780,27 @@ p2m_flush_nestedp2m(struct domain *d) p2m_flush_table(d->arch.nested_p2m[i]); } +void np2m_flush_eptp(struct vcpu *v, unsigned long eptp) +{ + struct domain *d = v->domain; + struct p2m_domain *p2m; + unsigned int i; + + eptp &= ~(0xfffull); + + nestedp2m_lock(d); + for ( i = 0; i < MAX_NESTEDP2M; i++ ) + { + p2m = d->arch.nested_p2m[i]; + p2m_lock(p2m); + if ( p2m->np2m_base == eptp ) + p2m_flush_table_locked(p2m); + else + p2m_unlock(p2m); + } + nestedp2m_unlock(d); +} + static void assign_np2m(struct vcpu *v, struct p2m_domain *p2m) { struct nestedvcpu *nv = &vcpu_nestedhvm(v); diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h index 9086bb35dc..0e39999387 100644 --- a/xen/include/asm-x86/p2m.h +++ b/xen/include/asm-x86/p2m.h @@ -779,6 +779,8 @@ int p2m_pt_handle_deferred_changes(uint64_t gpa); void p2m_flush(struct vcpu *v, struct p2m_domain *p2m); /* Flushes all nested p2m tables */ void p2m_flush_nestedp2m(struct domain *d); +/* Flushes all np2m objects with the specified eptp */ +void np2m_flush_eptp(struct vcpu *v, unsigned long eptp); void nestedp2m_write_p2m_entry(struct p2m_domain *p2m, unsigned long gfn, l1_pgentry_t *p, l1_pgentry_t new, unsigned int level); -- 2.11.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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