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Subject[PATCH V10 14/14] xen/pvh: vcpu info placement, load CS selector, and remove debug printk.
Date
From: Mukesh Rathor <mukesh.rathor@oracle.com>

This patch addresses 3 things:
- Resolve vcpu info placement fixme.
- Load CS selector for PVH after switching to new gdt.
- Remove printk in case of failure to map pnfs in p2m. This because qemu
has lot of expected failures when mapping HVM pages.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
[v1: Added #ifdef for 64-bit]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
arch/x86/xen/enlighten.c | 23 +++++++++++++++++++----
arch/x86/xen/mmu.c | 3 ---
2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 0bfbe92..329dad9 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1132,14 +1132,12 @@ void xen_setup_shared_info(void)
HYPERVISOR_shared_info =
(struct shared_info *)__va(xen_start_info->shared_info);

- /* PVH TBD/FIXME: vcpu info placement in phase 2 */
- if (xen_pvh_domain())
- return;
-
#ifndef CONFIG_SMP
/* In UP this is as good a place as any to set up shared info */
xen_setup_vcpu_info_placement();
#endif
+ if (xen_pvh_domain())
+ return;

xen_setup_mfn_list_list();
}
@@ -1152,6 +1150,10 @@ void xen_setup_vcpu_info_placement(void)
for_each_possible_cpu(cpu)
xen_vcpu_setup(cpu);

+ /* PVH always uses native IRQ ops */
+ if (xen_pvh_domain())
+ return;
+
/* xen_vcpu_setup managed to place the vcpu_info within the
percpu area for all cpus, so make use of it */
if (have_vcpu_info_placement) {
@@ -1423,7 +1425,20 @@ static void __init xen_setup_stackprotector(void)
{
/* PVH TBD/FIXME: investigate setup_stack_canary_segment */
if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ unsigned long dummy;
+
switch_to_new_gdt(0);
+#ifdef CONFIG_X86_64
+ asm volatile ("pushq %0\n"
+ "leaq 1f(%%rip),%0\n"
+ "pushq %0\n"
+ "lretq\n"
+ "1:\n"
+ : "=&r" (dummy) : "0" (__KERNEL_CS));
+#else
+ /* PVH: TODO Implement. */
+ BUG();
+#endif
return;
}
pv_cpu_ops.write_gdt_entry = xen_write_gdt_entry_boot;
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 108fb4a..5499689 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2534,9 +2534,6 @@ static int pvh_add_to_xen_p2m(unsigned long lpfn, unsigned long fgmfn,
set_xen_guest_handle(xatp.errs, &err);

rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp);
- if (rc || err)
- pr_warn("d0: Failed to map pfn (0x%lx) to mfn (0x%lx) rc:%d:%d\n",
- lpfn, fgmfn, rc, err);
return rc;
}

--
1.7.7.6


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