From 8360544a6d3a54df1fce80f55ba4ad075a8ded54 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Wed, 12 Oct 2016 14:07:04 +1100 Subject: [PATCH] libqos: Limit spapr-pci to 32-bit MMIO for now Currently the functions in pci-spapr.c (like pci-pc.c on which it's based) don't distinguish between 32-bit and 64-bit PCI MMIO. At the moment, the qemu side implementation is a bit weird and has a single MMIO window straddling 32-bit and 64-bit regions, but we're likely to change that in future. In any case, pci-pc.c - and therefore the testcases using PCI - only handle 32-bit MMIOs for now. For spapr despite whatever changes might happen with the MMIO windows, the 32-bit window is likely to remain at 2..4 GiB in PCI space. So, explicitly limit pci-spapr.c to 32-bit MMIOs for now, we can add 64-bit MMIO support back in when and if we need it. Signed-off-by: David Gibson Reviewed-by: Laurent Vivier --- tests/libqos/pci-spapr.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) diff --git a/tests/libqos/pci-spapr.c b/tests/libqos/pci-spapr.c index 3192903..558dfc3 100644 --- a/tests/libqos/pci-spapr.c +++ b/tests/libqos/pci-spapr.c @@ -32,8 +32,8 @@ typedef struct QPCIBusSPAPR { uint64_t pio_cpu_base; QPCIWindow pio; - uint64_t mmio_cpu_base; - QPCIWindow mmio; + uint64_t mmio32_cpu_base; + QPCIWindow mmio32; uint64_t pci_hole_start; uint64_t pci_hole_size; @@ -58,7 +58,7 @@ static uint8_t qpci_spapr_io_readb(QPCIBus *bus, void *addr) if (port < s->pio.size) { v = readb(s->pio_cpu_base + port); } else { - v = readb(s->mmio_cpu_base + port); + v = readb(s->mmio32_cpu_base + port); } return v; } @@ -71,7 +71,7 @@ static uint16_t qpci_spapr_io_readw(QPCIBus *bus, void *addr) if (port < s->pio.size) { v = readw(s->pio_cpu_base + port); } else { - v = readw(s->mmio_cpu_base + port); + v = readw(s->mmio32_cpu_base + port); } return bswap16(v); } @@ -84,7 +84,7 @@ static uint32_t qpci_spapr_io_readl(QPCIBus *bus, void *addr) if (port < s->pio.size) { v = readl(s->pio_cpu_base + port); } else { - v = readl(s->mmio_cpu_base + port); + v = readl(s->mmio32_cpu_base + port); } return bswap32(v); } @@ -96,7 +96,7 @@ static void qpci_spapr_io_writeb(QPCIBus *bus, void *addr, uint8_t value) if (port < s->pio.size) { writeb(s->pio_cpu_base + port, value); } else { - writeb(s->mmio_cpu_base + port, value); + writeb(s->mmio32_cpu_base + port, value); } } @@ -108,7 +108,7 @@ static void qpci_spapr_io_writew(QPCIBus *bus, void *addr, uint16_t value) if (port < s->pio.size) { writew(s->pio_cpu_base + port, value); } else { - writew(s->mmio_cpu_base + port, value); + writew(s->mmio32_cpu_base + port, value); } } @@ -120,7 +120,7 @@ static void qpci_spapr_io_writel(QPCIBus *bus, void *addr, uint32_t value) if (port < s->pio.size) { writel(s->pio_cpu_base + port, value); } else { - writel(s->mmio_cpu_base + port, value); + writel(s->mmio32_cpu_base + port, value); } } @@ -235,12 +235,9 @@ static void qpci_spapr_iounmap(QPCIBus *bus, void *data) /* FIXME */ } -#define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL #define SPAPR_PCI_WINDOW_BASE 0x10000000000ULL -#define SPAPR_PCI_WINDOW_SPACING 0x1000000000ULL -#define SPAPR_PCI_MMIO_WIN_OFF 0xA0000000 -#define SPAPR_PCI_MMIO_WIN_SIZE (SPAPR_PCI_WINDOW_SPACING - \ - SPAPR_PCI_MEM_WIN_BUS_OFFSET) +#define SPAPR_PCI_MMIO32_WIN_OFF 0xA0000000 +#define SPAPR_PCI_MMIO32_WIN_SIZE 0x80000000 /* 2 GiB */ #define SPAPR_PCI_IO_WIN_OFF 0x80000000 #define SPAPR_PCI_IO_WIN_SIZE 0x10000 @@ -280,13 +277,14 @@ QPCIBus *qpci_init_spapr(QGuestAllocator *alloc) ret->pio.pci_base = 0; ret->pio.size = SPAPR_PCI_IO_WIN_SIZE; - ret->mmio_cpu_base = SPAPR_PCI_WINDOW_BASE + SPAPR_PCI_MMIO_WIN_OFF; - ret->mmio.pci_base = SPAPR_PCI_MEM_WIN_BUS_OFFSET; - ret->mmio.size = SPAPR_PCI_MMIO_WIN_SIZE; + /* 32-bit portion of the MMIO window is at PCI address 2..4 GiB */ + ret->mmio32_cpu_base = SPAPR_PCI_WINDOW_BASE + SPAPR_PCI_MMIO32_WIN_OFF; + ret->mmio32.pci_base = 0x80000000; /* 2 GiB */ + ret->mmio32.size = SPAPR_PCI_MMIO32_WIN_SIZE; ret->pci_hole_start = 0xC0000000; ret->pci_hole_size = - ret->mmio.pci_base + ret->mmio.size - ret->pci_hole_start; + ret->mmio32.pci_base + ret->mmio32.size - ret->pci_hole_start; ret->pci_hole_alloc = 0; ret->pci_iohole_start = 0xc000; -- 2.7.4