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authorGlauber de Oliveira Costa <gcosta@redhat.com>2008-01-17 19:14:46 -0200
committerRusty Russell <rusty@rustcorp.com.au>2008-01-30 22:50:17 +1100
commitae3749dcd8c31dcfbab14ea28c68a944c93f418f (patch)
treebdbbe9207bb7c50e9aeb7afc5b5653b79501c03f /drivers
parentf34f8c5fea079065671163c37d98328cff31980b (diff)
lguest: move changed bitmap to lg_cpu
events represented in the 'changed' bitmap are per-cpu, not per-guest. move it to the lg_cpu structure Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/lguest/interrupts_and_traps.c2
-rw-r--r--drivers/lguest/lg.h6
-rw-r--r--drivers/lguest/segments.c4
-rw-r--r--drivers/lguest/x86/core.c11
4 files changed, 11 insertions, 12 deletions
diff --git a/drivers/lguest/interrupts_and_traps.c b/drivers/lguest/interrupts_and_traps.c
index 6bbfce4e5987..9ac7455ec7fb 100644
--- a/drivers/lguest/interrupts_and_traps.c
+++ b/drivers/lguest/interrupts_and_traps.c
@@ -395,7 +395,7 @@ void load_guest_idt_entry(struct lg_cpu *cpu, unsigned int num, u32 lo, u32 hi)
/* Mark the IDT as changed: next time the Guest runs we'll know we have
* to copy this again. */
- cpu->lg->changed |= CHANGED_IDT;
+ cpu->changed |= CHANGED_IDT;
/* Check that the Guest doesn't try to step outside the bounds. */
if (num >= ARRAY_SIZE(cpu->arch.idt))
diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index f1c4c33e4153..0d6f6435d72c 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -51,6 +51,9 @@ struct lg_cpu {
u32 esp1;
u8 ss1;
+ /* Bitmap of what has changed: see CHANGED_* above. */
+ int changed;
+
unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */
/* At end of a page shared mapped over lguest_pages in guest. */
@@ -92,9 +95,6 @@ struct lguest
void __user *mem_base;
unsigned long kernel_address;
- /* Bitmap of what has changed: see CHANGED_* above. */
- int changed;
-
struct pgdir pgdirs[4];
unsigned long noirq_start, noirq_end;
diff --git a/drivers/lguest/segments.c b/drivers/lguest/segments.c
index 02138450ecf5..635f54c719ae 100644
--- a/drivers/lguest/segments.c
+++ b/drivers/lguest/segments.c
@@ -159,7 +159,7 @@ void load_guest_gdt(struct lg_cpu *cpu, unsigned long table, u32 num)
fixup_gdt_table(cpu, 0, ARRAY_SIZE(cpu->arch.gdt));
/* Mark that the GDT changed so the core knows it has to copy it again,
* even if the Guest is run on the same CPU. */
- lg->changed |= CHANGED_GDT;
+ cpu->changed |= CHANGED_GDT;
}
/* This is the fast-track version for just changing the three TLS entries.
@@ -174,7 +174,7 @@ void guest_load_tls(struct lg_cpu *cpu, unsigned long gtls)
__lgread(lg, tls, gtls, sizeof(*tls)*GDT_ENTRY_TLS_ENTRIES);
fixup_gdt_table(cpu, GDT_ENTRY_TLS_MIN, GDT_ENTRY_TLS_MAX+1);
/* Note that just the TLS entries have changed. */
- lg->changed |= CHANGED_GDT_TLS;
+ cpu->changed |= CHANGED_GDT_TLS;
}
/*:*/
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index f8dfdc9a3e5b..fd6a8512443c 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -75,7 +75,6 @@ static DEFINE_PER_CPU(struct lg_cpu *, last_cpu);
*/
static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
{
- struct lguest *lg = cpu->lg;
/* Copying all this data can be quite expensive. We usually run the
* same Guest we ran last time (and that Guest hasn't run anywhere else
* meanwhile). If that's not the case, we pretend everything in the
@@ -83,7 +82,7 @@ static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
if (__get_cpu_var(last_cpu) != cpu || cpu->last_pages != pages) {
__get_cpu_var(last_cpu) = cpu;
cpu->last_pages = pages;
- lg->changed = CHANGED_ALL;
+ cpu->changed = CHANGED_ALL;
}
/* These copies are pretty cheap, so we do them unconditionally: */
@@ -99,18 +98,18 @@ static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
pages->state.guest_tss.ss1 = cpu->ss1;
/* Copy direct-to-Guest trap entries. */
- if (lg->changed & CHANGED_IDT)
+ if (cpu->changed & CHANGED_IDT)
copy_traps(cpu, pages->state.guest_idt, default_idt_entries);
/* Copy all GDT entries which the Guest can change. */
- if (lg->changed & CHANGED_GDT)
+ if (cpu->changed & CHANGED_GDT)
copy_gdt(cpu, pages->state.guest_gdt);
/* If only the TLS entries have changed, copy them. */
- else if (lg->changed & CHANGED_GDT_TLS)
+ else if (cpu->changed & CHANGED_GDT_TLS)
copy_gdt_tls(cpu, pages->state.guest_gdt);
/* Mark the Guest as unchanged for next time. */
- lg->changed = 0;
+ cpu->changed = 0;
}
/* Finally: the code to actually call into the Switcher to run the Guest. */