[PATCH 2/4] kvm: support any size for pio eventfd

Michael S. Tsirkin
2013-04-03T08:58:43Z

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
kvm-all.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c
index ca9775d..589e37c 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -500,8 +500,8 @@ int kvm_check_extension(KVMState *s, unsigned int extension)
return ret;
}

-static int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val, bool assign,
- uint32_t size)
+static int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val,
+ bool assign, uint32_t size)
{
int ret;
struct kvm_ioeventfd iofd;
@@ -529,13 +529,13 @@ static int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val, bool assi
return 0;
}

-static int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val,
- bool assign)
+static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val,
+ bool assign, uint32_t size)
{
struct kvm_ioeventfd kick = {
.datamatch = val,
.addr = addr,
- .len = 2,
+ .len = size,
.flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO,
.fd = fd,
};
@@ -571,7 +571,7 @@ static int kvm_check_many_ioeventfds(void)
if (ioeventfds[i] < 0) {
break;
}
- ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true);
+ ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2);
if (ret < 0) {
close(ioeventfds[i]);
break;
@@ -582,7 +582,7 @@ static int kvm_check_many_ioeventfds(void)
ret = i == ARRAY_SIZE(ioeventfds);

while (i-- > 0) {
- kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false);
+ kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2);
close(ioeventfds[i]);
}
return ret;
@@ -834,10 +834,10 @@ static void kvm_io_ioeventfd_add(MemoryListener *listener,
int fd = event_notifier_get_fd(e);
int r;

- assert(match_data && section->size == 2);
+ assert(match_data && section->size <= 8);

- r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space,
- data, true);
+ r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
+ data, true, section->size);
if (r < 0) {
abort();
}
@@ -852,8 +852,8 @@ static void kvm_io_ioeventfd_del(MemoryListener *listener,
int fd = event_notifier_get_fd(e);
int r;

- r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space,
- data, false);
+ r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
+ data, false, section->size);
if (r < 0) {
abort();
}
--
MST