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Re: [Qemu-devel] RFC: ACPI table loading
|
From: |
Isaku Yamahata |
|
Subject: |
Re: [Qemu-devel] RFC: ACPI table loading |
|
Date: |
Thu, 17 Mar 2011 12:35:01 +0900 |
|
User-agent: |
Mutt/1.5.19 (2009-01-05) |
The behavior seems reasonable. So I cleaned it up for upstream merge.
thanks,
>From cd336e50ebda63ecd84f8172dcf4d4456059d615 Mon Sep 17 00:00:00 2001
Message-Id: <address@hidden>
From: Isaku Yamahata <address@hidden>
Date: Thu, 17 Mar 2011 12:28:52 +0900
Subject: [PATCH] acpi: rewamp acpitable parsing, and allow specifying complete
file with headers
This patch almost rewrites acpi_table_add() function
(but still leaves it using old get_param_value() interface).
The result is that it's now possible to specify whole table
(together with a header) in an external file, instead of just
data portion, with a new file= parameter, but at the same time
it's still possible to specify header fields as before.
Signed-off-by: Michael Tokarev <address@hidden>
Signed-off-by: Isaku Yamahata <address@hidden>
---
Changes v2:
- rebased to 31d3c9b8c15d7b42f508d5fc2adc4abb7c732b70
- style fix
- eliminated unaligned access
- replace magic numbers with symbolic constants
- error report
---
hw/acpi.c | 294 ++++++++++++++++++++++++++++++++++++++-----------------------
1 files changed, 184 insertions(+), 110 deletions(-)
diff --git a/hw/acpi.c b/hw/acpi.c
index 8071e7b..b058e20 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -32,6 +32,30 @@ struct acpi_table_header
uint32_t asl_compiler_revision; /* ASL compiler revision number */
} __attribute__((packed));
+#define ACPI_TABLE_OFF(x) (offsetof(struct acpi_table_header, x))
+#define ACPI_TABLE_SIZE(x) (sizeof(((struct acpi_table_header*)0)->x))
+
+#define ACPI_TABLE_SIG_OFF ACPI_TABLE_OFF(signature)
+#define ACPI_TABLE_SIG_SIZE ACPI_TABLE_SIZE(signature)
+#define ACPI_TABLE_LEN_OFF ACPI_TABLE_OFF(length)
+#define ACPI_TABLE_LEN_SIZE ACPI_TABLE_SIZE(length)
+#define ACPI_TABLE_REV_OFF ACPI_TABLE_OFF(revision)
+#define ACPI_TABLE_REV_SIZE ACPI_TABLE_SIZE(revision)
+#define ACPI_TABLE_CSUM_OFF ACPI_TABLE_OFF(checksum)
+#define ACPI_TABLE_CSUM_SIZE ACPI_TABLE_SIZE(checksum)
+#define ACPI_TABLE_OEM_ID_OFF ACPI_TABLE_OFF(oem_id)
+#define ACPI_TABLE_OEM_ID_SIZE ACPI_TABLE_SIZE(oem_id)
+#define ACPI_TABLE_OEM_TABLE_ID_OFF ACPI_TABLE_OFF(oem_table_id)
+#define ACPI_TABLE_OEM_TABLE_ID_SIZE ACPI_TABLE_SIZE(oem_table_id)
+#define ACPI_TABLE_OEM_REV_OFF ACPI_TABLE_OFF(oem_revision)
+#define ACPI_TABLE_OEM_REV_SIZE ACPI_TABLE_SIZE(oem_revision)
+#define ACPI_TABLE_ASL_COMPILER_ID_OFF ACPI_TABLE_OFF(asl_compiler_id)
+#define ACPI_TABLE_ASL_COMPILER_ID_SIZE ACPI_TABLE_SIZE(asl_compiler_id)
+#define ACPI_TABLE_ASL_COMPILER_REV_OFF ACPI_TABLE_OFF(asl_compiler_revision)
+#define ACPI_TABLE_ASL_COMPILER_REV_SIZE ACPI_TABLE_SIZE(asl_compiler_revision)
+
+#define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header)
+
char *acpi_tables;
size_t acpi_tables_len;
@@ -44,156 +68,206 @@ static int acpi_checksum(const uint8_t *data, int len)
return (-sum) & 0xff;
}
+/* XXX fixme: this function uses obsolete argument parsing interface */
int acpi_table_add(const char *t)
{
static const char *dfl_id = "QEMUQEMU";
- char buf[1024], *p, *f;
- struct acpi_table_header acpi_hdr;
+ char buf[1024], *f, *p;
unsigned long val;
- uint32_t length;
- struct acpi_table_header *acpi_hdr_p;
- size_t off;
+ uint16_t val16;
+ uint32_t val32;
+ size_t len, start;
+ bool has_header;
+ int changed;
- memset(&acpi_hdr, 0, sizeof(acpi_hdr));
-
- if (get_param_value(buf, sizeof(buf), "sig", t)) {
- strncpy(acpi_hdr.signature, buf, 4);
+ if (get_param_value(buf, sizeof(buf), "data", t)) {
+ has_header = false;
+ } else if (get_param_value(buf, sizeof(buf), "file", t)) {
+ has_header = true;
} else {
- strncpy(acpi_hdr.signature, dfl_id, 4);
+ has_header = 0;
+ buf[0] = '\0';
+ }
+
+ if (!acpi_tables) {
+ acpi_tables_len = sizeof(uint16_t);
+ acpi_tables = qemu_mallocz(acpi_tables_len);
+ }
+ start = acpi_tables_len;
+
+ len = sizeof(uint16_t) + ACPI_TABLE_HDR_SIZE;
+ acpi_tables = qemu_realloc(acpi_tables, acpi_tables_len + len);
+ acpi_tables_len += sizeof(uint16_t);
+
+ if (!has_header) {
+ memset(acpi_tables + acpi_tables_len, 0, ACPI_TABLE_HDR_SIZE);
+ acpi_tables_len += ACPI_TABLE_HDR_SIZE;
}
+
+ /* now read in the data files, reallocating buffer as needed */
+ for(f = strtok(buf, ":"); f; f = strtok(NULL, ":")) {
+ int fd = open(f, O_RDONLY);
+ if(fd < 0) {
+ fprintf(stderr, "can't open file %s: %s\n", f, strerror(errno));
+ goto out;
+ }
+
+ for(;;) {
+ char data[8192];
+ ssize_t r = read(fd, data, sizeof(data));
+ if (r == 0) {
+ break;
+ } else if (r > 0) {
+ acpi_tables = qemu_realloc(acpi_tables, acpi_tables_len + r);
+ memcpy(acpi_tables + acpi_tables_len, data, r);
+ acpi_tables_len += r;
+ } else if (errno != EINTR) {
+ fprintf(stderr, "can't read file %s: %s\n",
+ f, strerror(errno));
+ close(fd);
+ goto out;
+ }
+ }
+
+ close(fd);
+ }
+
+ /* fill in the complete length of the table */
+ len = acpi_tables_len - start - sizeof(uint16_t);
+ f = acpi_tables + start;
+ val16 = cpu_to_le16(len);
+ memcpy(f, &val16, sizeof(uint16_t));
+ f += sizeof(uint16_t);
+
+ /* now fill in the header fields */
+ changed = 0;
+
+ /* 0..3, signature, string (4 bytes) */
+ if (get_param_value(buf, sizeof(buf), "sig", t)) {
+ strncpy(f + ACPI_TABLE_SIG_OFF, buf, ACPI_TABLE_SIG_SIZE);
+ ++changed;
+ } else if (!has_header) {
+ strncpy(f + ACPI_TABLE_SIG_OFF, dfl_id, ACPI_TABLE_SIG_SIZE);
+ }
+
+ /* 4..7, length of the table, in bytes, including header (4 bytes) */
+
+ /* 8, ACPI specification minor version #, 1 byte */
if (get_param_value(buf, sizeof(buf), "rev", t)) {
val = strtoul(buf, &p, 10);
- if (val > 255 || *p != '\0')
+ if (val > 255 || *p != '\0') {
+ fprintf(stderr, "invalid acpi rev.\n");
goto out;
- } else {
- val = 1;
+ }
+ f[ACPI_TABLE_REV_OFF] = (uint8_t)val;
+ ++changed;
+ } else if (!has_header) {
+ f[ACPI_TABLE_REV_OFF] = 1;
}
- acpi_hdr.revision = (int8_t)val;
+ /* 9, checksum of entire table (1 byte)
+ this will be processed after all the headers are modified */
+
+ /* 10..15 OEM identification (6 bytes) */
if (get_param_value(buf, sizeof(buf), "oem_id", t)) {
- strncpy(acpi_hdr.oem_id, buf, 6);
- } else {
- strncpy(acpi_hdr.oem_id, dfl_id, 6);
+ strncpy(f + ACPI_TABLE_OEM_ID_OFF, buf, ACPI_TABLE_OEM_ID_SIZE);
+ ++changed;
+ } else if (!has_header) {
+ strncpy(f + ACPI_TABLE_OEM_ID_OFF, dfl_id, ACPI_TABLE_OEM_ID_SIZE);
}
+ /* 16..23 OEM table identifiaction, 8 bytes */
if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) {
- strncpy(acpi_hdr.oem_table_id, buf, 8);
- } else {
- strncpy(acpi_hdr.oem_table_id, dfl_id, 8);
+ strncpy(f + ACPI_TABLE_OEM_TABLE_ID_OFF, buf,
+ ACPI_TABLE_OEM_TABLE_ID_SIZE);
+ ++changed;
+ } else if (!has_header) {
+ strncpy(f + ACPI_TABLE_OEM_TABLE_ID_OFF, dfl_id,
+ ACPI_TABLE_OEM_TABLE_ID_SIZE);
}
+ /* 24..27 OEM revision number, 4 bytes */
if (get_param_value(buf, sizeof(buf), "oem_rev", t)) {
val = strtol(buf, &p, 10);
- if(*p != '\0')
+ if(*p != '\0') {
+ fprintf(stderr, "invalid acpi oem_rev.\n");
goto out;
- } else {
- val = 1;
+ }
+ val32 = cpu_to_le32(val);
+ memcpy(f + ACPI_TABLE_OEM_REV_OFF, &val32, ACPI_TABLE_OEM_REV_SIZE);
+ ++changed;
+ } else if (!has_header) {
+ val32 = cpu_to_le32(1);
+ memcpy(f + ACPI_TABLE_OEM_REV_OFF, &val32, ACPI_TABLE_OEM_REV_SIZE);
}
- acpi_hdr.oem_revision = cpu_to_le32(val);
+ /* 28..31 ASL compiler vendor ID (4 bytes) */
if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) {
- strncpy(acpi_hdr.asl_compiler_id, buf, 4);
- } else {
- strncpy(acpi_hdr.asl_compiler_id, dfl_id, 4);
+ strncpy(f + ACPI_TABLE_ASL_COMPILER_ID_OFF, buf,
+ ACPI_TABLE_ASL_COMPILER_ID_SIZE);
+ ++changed;
+ } else if (!has_header) {
+ strncpy(f + ACPI_TABLE_ASL_COMPILER_ID_OFF, dfl_id,
+ ACPI_TABLE_ASL_COMPILER_ID_SIZE);
}
+ /* 32..35 ASL compiler revision number (4 bytes) */
if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) {
val = strtol(buf, &p, 10);
- if(*p != '\0')
- goto out;
- } else {
- val = 1;
- }
- acpi_hdr.asl_compiler_revision = cpu_to_le32(val);
-
- if (!get_param_value(buf, sizeof(buf), "data", t)) {
- buf[0] = '\0';
- }
-
- length = sizeof(acpi_hdr);
-
- f = buf;
- while (buf[0]) {
- struct stat s;
- char *n = strchr(f, ':');
- if (n)
- *n = '\0';
- if(stat(f, &s) < 0) {
- fprintf(stderr, "Can't stat file '%s': %s\n", f, strerror(errno));
+ if(*p != '\0') {
+ fprintf(stderr, "invalid acpi asl_compiler_rev.\n");
goto out;
}
- length += s.st_size;
- if (!n)
- break;
- *n = ':';
- f = n + 1;
- }
+ val32 = cpu_to_le32(val);
+ memcpy(f + ACPI_TABLE_ASL_COMPILER_REV_OFF, &val32,
+ ACPI_TABLE_ASL_COMPILER_REV_SIZE);
+ ++changed;
+ } else if (!has_header) {
+ val32 = cpu_to_le32(1);
+ memcpy(f + ACPI_TABLE_ASL_COMPILER_REV_OFF, &val32,
+ ACPI_TABLE_ASL_COMPILER_REV_SIZE);
- if (!acpi_tables) {
- acpi_tables_len = sizeof(uint16_t);
- acpi_tables = qemu_mallocz(acpi_tables_len);
}
- acpi_tables = qemu_realloc(acpi_tables,
- acpi_tables_len + sizeof(uint16_t) + length);
- p = acpi_tables + acpi_tables_len;
- acpi_tables_len += sizeof(uint16_t) + length;
-
- *(uint16_t*)p = cpu_to_le32(length);
- p += sizeof(uint16_t);
- memcpy(p, &acpi_hdr, sizeof(acpi_hdr));
- off = sizeof(acpi_hdr);
-
- f = buf;
- while (buf[0]) {
- struct stat s;
- int fd;
- char *n = strchr(f, ':');
- if (n)
- *n = '\0';
- fd = open(f, O_RDONLY);
-
- if(fd < 0)
- goto out;
- if(fstat(fd, &s) < 0) {
- close(fd);
- goto out;
- }
- /* off < length is necessary because file size can be changed
- under our foot */
- while(s.st_size && off < length) {
- int r;
- r = read(fd, p + off, s.st_size);
- if (r > 0) {
- off += r;
- s.st_size -= r;
- } else if ((r < 0 && errno != EINTR) || r == 0) {
- close(fd);
- goto out;
- }
+ /* 4..7 length of the table including header, in bytes (4 bytes) */
+ if (!has_header) {
+ if (!changed) {
+ fprintf(stderr,
+ "warning: acpi table specified with data="
+ " but no table headers are provided, defaults are used\n");
+ }
+ } else {
+ /* check if actual length is correct */
+ memcpy(&val32, f + ACPI_TABLE_LEN_OFF, ACPI_TABLE_LEN_SIZE);
+ val = le32_to_cpu(val32);
+ if (val != len) {
+ fprintf(stderr,
+ "warning: acpi table specified with file= has wrong
length,"
+ " header says %lu, actual size %zu\n",
+ val, len);
+ ++changed;
}
-
- close(fd);
- if (!n)
- break;
- f = n + 1;
}
- if (off < length) {
- /* don't pass random value in process to guest */
- memset(p + off, 0, length - off);
+
+ /* fix table length */
+ /* we may avoid putting length here if has_header is true */
+ val32 = cpu_to_le32(len);
+ memcpy(f + ACPI_TABLE_LEN_OFF, &val32, ACPI_TABLE_LEN_SIZE);
+
+ /* 9 checksum (1 byte) */
+ /* we may as well leave checksum intact if has_header is true */
+ /* alternatively there may be a way to set cksum to a given value */
+ if (changed || !has_header || 1) {
+ f[ACPI_TABLE_CSUM_OFF] = 0;
+ f[ACPI_TABLE_CSUM_OFF] = acpi_checksum((uint8_t*)f, len);
}
- acpi_hdr_p = (struct acpi_table_header*)p;
- acpi_hdr_p->length = cpu_to_le32(length);
- acpi_hdr_p->checksum = acpi_checksum((uint8_t*)p, length);
/* increase number of tables */
(*(uint16_t*)acpi_tables) =
- cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables) + 1);
+ cpu_to_le16(le16_to_cpu(*(uint16_t*)acpi_tables) + 1);
return 0;
+
out:
- if (acpi_tables) {
- qemu_free(acpi_tables);
- acpi_tables = NULL;
- }
+ acpi_tables_len = start;
return -1;
}
--
1.7.1.1
On Wed, Mar 16, 2011 at 04:47:01PM +0300, Michael Tokarev wrote:
> 16.03.2011 15:10, Isaku Yamahata wrote:
> > On Wed, Mar 16, 2011 at 01:12:27PM +0300, Michael Tokarev wrote:
> >> 16.03.2011 12:29, Isaku Yamahata wrote:
>
> >>> Example:
> >>> qemu-system-x86_64 ... -M pc_q35 -acpitable
> >>> 'load_header,data=roms/seabios/src/q35-acpi-dsdt.aml
> >>
> >> My question is unrelated to your q35 work, but I have a suggestion
> >> here: can we avoid this "load_header" thing please? I hacked this
> >> area locally a while back while trying to run OEM-licensed windows
> >> with a SLIC table in BIOS, and wanted to come with alternative
> >> approach. Now when you reminded me that again I'd rather finish
> >> that old thing and post a real patch...
> >>
> >> Here's my "idea". First, if there's no other options provided
> >> except of data=..., just treat it as "headerful", ie, complete with
> >> the header. Or alternatively (or at the same time), recognize
> >> "file=" the same way as "data=". We can go even further and load
> >> file/data first and patch in the other header field if specified,
> >> so it'll be possible to overwrite only certain parts of the header
> >> but load the rest of the table (complete with all other headers)
> >> from a file.
> >>
> >> Does it make sense?
> >
> > It sounds reasonable. As long as the patch is acceptable,
> > I'm willing to update the patch.
> > Let me summarize it. Your suggestion for -acpitable is
> >
> > existing behavior your suggested way
> > data= only
> > no sig=,... header is filled with zero headerful
> > (headerless) (new behaviour)
> > useless behavior
> >
> > with sig=... header is created header is created
> > (headerless) (headerless)
>
> I just implemented the whole thing, and refined it at the same
> time. With data= it works the same way as before, so no
> new behavour is introduced. Only with file= it is possible
> to specify whole table (with header) in a file, but other
> header fields specified on the command line (sig= etc) will
> work still, replacing the corresponding fields in the header
> read from the file.
>
> Something like the below, it's just an RFC, but it appears
> to work.
>
> /mjt
>
> Subject: rewamp acpitable parsing, and allow specifying complete file with
> headers
>
> This patch almost rewrites acpi_table_add() function
> (but still leaves it using old get_param_value() interface).
> The result is that it's now possible to specify whole table
> (together with a header) in an external file, instead of just
> data portion, with a new file= parameter, but at the same time
> it's still possible to specify header fields as before.
>
> Signed-off-by: Michael Tokarev <address@hidden>
>
> diff --git a/hw/acpi.c b/hw/acpi.c
> index 237526d..d12527e 100644
> --- a/hw/acpi.c
> +++ b/hw/acpi.c
> @@ -22,18 +22,8 @@
> #include "qemu-kvm.h"
> #include "string.h"
>
> -struct acpi_table_header
> -{
> - char signature [4]; /* ACPI signature (4 ASCII characters) */
> - uint32_t length; /* Length of table, in bytes, including header
> */
> - uint8_t revision; /* ACPI Specification minor version # */
> - uint8_t checksum; /* To make sum of entire table == 0 */
> - char oem_id [6]; /* OEM identification */
> - char oem_table_id [8]; /* OEM table identification */
> - uint32_t oem_revision; /* OEM revision number */
> - char asl_compiler_id [4]; /* ASL compiler vendor ID */
> - uint32_t asl_compiler_revision; /* ASL compiler revision number */
> -} __attribute__((packed));
> +
> +#define ACPI_TABLE_HDR_SIZE (4+4+1+1+6+8+4+4+4)
>
> char *acpi_tables;
> size_t acpi_tables_len;
> @@ -50,153 +40,220 @@ static int acpi_checksum(const uint8_t *data, int len)
> int acpi_table_add(const char *t)
> {
> static const char *dfl_id = "QEMUQEMU";
> - char buf[1024], *p, *f;
> - struct acpi_table_header acpi_hdr;
> + char buf[1024], *f, *p;
> unsigned long val;
> - uint32_t length;
> - struct acpi_table_header *acpi_hdr_p;
> - size_t off;
> -
> - memset(&acpi_hdr, 0, sizeof(acpi_hdr));
> -
> - if (get_param_value(buf, sizeof(buf), "sig", t)) {
> - strncpy(acpi_hdr.signature, buf, 4);
> - } else {
> - strncpy(acpi_hdr.signature, dfl_id, 4);
> - }
> - if (get_param_value(buf, sizeof(buf), "rev", t)) {
> + size_t len, start;
> + bool has_header;
> + int changed;
> +
> + /*XXX fixme: this function uses obsolete argument parsing interface */
> + /*XXX note: all 32bit accesses in there are misaligned */
> +
> + if (get_param_value(buf, sizeof(buf), "data", t))
> + {
> + has_header = 0;
> + }
> + else if (get_param_value(buf, sizeof(buf), "file", t))
> + {
> + has_header = 1;
> + }
> + else {
> + has_header = 0;
> + buf[0] = '\0';
> + }
> +
> + if (!acpi_tables)
> + {
> + acpi_tables_len = sizeof(uint16_t);
> + acpi_tables = qemu_mallocz(acpi_tables_len);
> + }
> + start = acpi_tables_len;
> +
> + len = sizeof(uint16_t) + ACPI_TABLE_HDR_SIZE;
> + acpi_tables = qemu_realloc(acpi_tables, acpi_tables_len + len);
> + acpi_tables_len += sizeof(uint16_t);
> +
> + if (!has_header)
> + {
> + memset(acpi_tables + acpi_tables_len, 0, ACPI_TABLE_HDR_SIZE);
> + acpi_tables_len += ACPI_TABLE_HDR_SIZE;
> + }
> +
> + /* now read in the data files, reallocating buffer as needed */
> +
> + for(f = strtok(buf, ":"); f; f = strtok(NULL, ":"))
> + {
> + int fd = open(f, O_RDONLY);
> +
> + if(fd < 0)
> + {
> + /*XXX fixme: report error */
> + goto out;
> + }
> +
> + for(;;)
> + {
> + char data[8192];
> + int r = read(fd, data, sizeof(data));
> + if (r == 0)
> + {
> + break;
> + }
> + else if (r > 0)
> + {
> + acpi_tables = qemu_realloc(acpi_tables, acpi_tables_len + r);
> + memcpy(acpi_tables + acpi_tables_len, data, r);
> + acpi_tables_len += r;
> + }
> + else if (errno != EINTR)
> + {
> + /*XXX fixme: report error */
> + close(fd);
> + goto out;
> + }
> + }
> +
> + close(fd);
> + }
> +
> + /* fill in the complete length of the table */
> + len = acpi_tables_len - start - sizeof(uint16_t);
> + f = acpi_tables + start;
> + *(uint16_t*)f = cpu_to_le32(len);
> + f += sizeof(uint16_t);
> +
> + /* now fill in the header fields */
> + changed = 0;
> +
> + /* 0..3, signature, string (4 bytes) */
> + if (get_param_value(buf, sizeof(buf), "sig", t))
> + {
> + strncpy(f + 0, buf, 4);
> + ++changed;
> + }
> + else if (!has_header)
> + {
> + strncpy(f + 0, dfl_id, 4);
> + }
> +
> + /* 4..7, length of the table, in bytes, including header (4 bytes) */
> +
> + /* 8, ACPI specification minor version #, 1 byte */
> + if (get_param_value(buf, sizeof(buf), "rev", t))
> + {
> val = strtoul(buf, &p, 10);
> if (val > 255 || *p != '\0')
> - goto out;
> - } else {
> - val = 1;
> + goto out; /*XXX fixme: report error */
> + f[8] = (uint8_t)val;
> + ++changed;
> + }
> + else if (!has_header)
> + {
> + f[8] = 1;
> }
> - acpi_hdr.revision = (int8_t)val;
>
> - if (get_param_value(buf, sizeof(buf), "oem_id", t)) {
> - strncpy(acpi_hdr.oem_id, buf, 6);
> - } else {
> - strncpy(acpi_hdr.oem_id, dfl_id, 6);
> + /* 9, checksum of entire table (1 byte) */
> +
> + /* 10..15 OEM identification (6 bytes) */
> + if (get_param_value(buf, sizeof(buf), "oem_id", t))
> + {
> + strncpy(f + 10, buf, 6);
> + ++changed;
> + }
> + else if (!has_header)
> + {
> + strncpy(f + 10, dfl_id, 6);
> }
>
> - if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) {
> - strncpy(acpi_hdr.oem_table_id, buf, 8);
> - } else {
> - strncpy(acpi_hdr.oem_table_id, dfl_id, 8);
> + /* 16..23 OEM table identifiaction, 8 bytes */
> + if (get_param_value(buf, sizeof(buf), "oem_table_id", t))
> + {
> + strncpy(f + 16, buf, 8);
> + ++changed;
> + }
> + else if (!has_header)
> + {
> + strncpy(f + 16, dfl_id, 8);
> }
>
> - if (get_param_value(buf, sizeof(buf), "oem_rev", t)) {
> + /* 24..27 OEM revision number, 4 bytes */
> + if (get_param_value(buf, sizeof(buf), "oem_rev", t))
> + {
> val = strtol(buf, &p, 10);
> if(*p != '\0')
> - goto out;
> - } else {
> - val = 1;
> + goto out; /*XXX fixme: report error */
> + *(uint32_t*)(f + 24) = cpu_to_le32(val);
> + ++changed;
> + } else if (!has_header)
> + {
> + *(uint32_t*)(f + 24) = cpu_to_le32(1);
> }
> - acpi_hdr.oem_revision = cpu_to_le32(val);
>
> - if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) {
> - strncpy(acpi_hdr.asl_compiler_id, buf, 4);
> - } else {
> - strncpy(acpi_hdr.asl_compiler_id, dfl_id, 4);
> + /* 28..31 ASL compiler vendor ID (4 bytes) */
> + if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t))
> + {
> + strncpy(f + 28, buf, 4);
> + ++changed;
> + }
> + else if (!has_header)
> + {
> + strncpy(f + 28, dfl_id, 4);
> }
>
> - if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) {
> + /* 32..35 ASL compiler revision number (4 bytes) */
> + if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t))
> + {
> val = strtol(buf, &p, 10);
> if(*p != '\0')
> - goto out;
> - } else {
> - val = 1;
> + goto out; /*XXX fixme: report error */
> + *(uint32_t*)(f + 32) = cpu_to_le32(val);
> + ++changed;
> }
> - acpi_hdr.asl_compiler_revision = cpu_to_le32(val);
> -
> - if (!get_param_value(buf, sizeof(buf), "data", t)) {
> - buf[0] = '\0';
> + else if (!has_header) {
> + *(uint32_t*)(f + 32) = cpu_to_le32(1);
> }
>
> - length = sizeof(acpi_hdr);
> + /* 4..7 length of the table including header, in bytes (4 bytes) */
> + if (!has_header)
> + {
> + if (!changed)
> + fprintf(stderr,
> + "warning: acpi table specified with data="
> + " but no table headers are provided, defaults are used\n");
> + }
> + else
> + {
> + /* check if actual length is correct */
> + val = le32_to_cpu(*(uint32_t*)(f + 4));
> + if (val != len)
> + {
> + fprintf(stderr,
> + "warning: acpi table specified with file= has wrong length,"
> + " header says %lu, actual size %u\n",
> + val, len);
> + ++changed;
> + }
> + }
>
> - f = buf;
> - while (buf[0]) {
> - struct stat s;
> - char *n = strchr(f, ':');
> - if (n)
> - *n = '\0';
> - if(stat(f, &s) < 0) {
> - fprintf(stderr, "Can't stat file '%s': %s\n", f,
> strerror(errno));
> - goto out;
> - }
> - length += s.st_size;
> - if (!n)
> - break;
> - *n = ':';
> - f = n + 1;
> - }
> -
> - if (!acpi_tables) {
> - acpi_tables_len = sizeof(uint16_t);
> - acpi_tables = qemu_mallocz(acpi_tables_len);
> - }
> - acpi_tables = qemu_realloc(acpi_tables,
> - acpi_tables_len + sizeof(uint16_t) + length);
> - p = acpi_tables + acpi_tables_len;
> - acpi_tables_len += sizeof(uint16_t) + length;
> -
> - *(uint16_t*)p = cpu_to_le32(length);
> - p += sizeof(uint16_t);
> - memcpy(p, &acpi_hdr, sizeof(acpi_hdr));
> - off = sizeof(acpi_hdr);
> -
> - f = buf;
> - while (buf[0]) {
> - struct stat s;
> - int fd;
> - char *n = strchr(f, ':');
> - if (n)
> - *n = '\0';
> - fd = open(f, O_RDONLY);
> + /* fix table length */
> + /* we may avoid putting length here if has_header is true */
> + *(uint32_t*)(f + 4) = cpu_to_le32(len);
> +
> + /* 9 checksum (1 byte) */
> + /* we may as well leave checksum intact if has_header is true */
> + /* alternatively there may be a way to set cksum to a given value */
> + if (changed || !has_header || 1)
> + {
> + f[9] = 0;
> + f[9] = acpi_checksum((uint8_t*)f, len);
> + }
>
> - if(fd < 0)
> - goto out;
> - if(fstat(fd, &s) < 0) {
> - close(fd);
> - goto out;
> - }
> -
> - /* off < length is necessary because file size can be changed
> - under our foot */
> - while(s.st_size && off < length) {
> - int r;
> - r = read(fd, p + off, s.st_size);
> - if (r > 0) {
> - off += r;
> - s.st_size -= r;
> - } else if ((r < 0 && errno != EINTR) || r == 0) {
> - close(fd);
> - goto out;
> - }
> - }
> -
> - close(fd);
> - if (!n)
> - break;
> - f = n + 1;
> - }
> - if (off < length) {
> - /* don't pass random value in process to guest */
> - memset(p + off, 0, length - off);
> - }
> -
> - acpi_hdr_p = (struct acpi_table_header*)p;
> - acpi_hdr_p->length = cpu_to_le32(length);
> - acpi_hdr_p->checksum = acpi_checksum((uint8_t*)p, length);
> /* increase number of tables */
> (*(uint16_t*)acpi_tables) =
> cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables) + 1);
> return 0;
> +
> out:
> - if (acpi_tables) {
> - qemu_free(acpi_tables);
> - acpi_tables = NULL;
> - }
> + acpi_tables_len = start;
> return -1;
> }
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 18f54d2..e1d26b4 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -995,12 +995,17 @@ Enable virtio balloon device (default), optionally with
> PCI address
> ETEXI
>
> DEF("acpitable", HAS_ARG, QEMU_OPTION_acpitable,
> - "-acpitable
> [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,data=file1[:file2]...]\n"
> + "-acpitable
> [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,{data|file}=file1[:file2]...]\n"
> " ACPI table description\n", QEMU_ARCH_I386)
> STEXI
> @item -acpitable
> address@hidden,address@hidden,address@hidden,address@hidden,address@hidden
> [,address@hidden,address@hidden,address@hidden:@var{file2}]...]
> @findex -acpitable
> Add ACPI table with specified header fields and context from specified files.
> +For file=, take whole ACPI table from the specified files, including all
> +ACPI headers (possible overridden by other options).
> +For data=, only data
> +portion of the table is used, all header information is specified in the
> +command line.
> ETEXI
>
> DEF("smbios", HAS_ARG, QEMU_OPTION_smbios,
>
--
yamahata
- Re: [Qemu-devel] Re: [PATCH 07/26] pci/p2pbr: generic pci p2p bridge, (continued)
[Qemu-devel] [PATCH 19/26] pc/piix_pci: factor out smram/pam logic, Isaku Yamahata, 2011/03/16
[Qemu-devel] [PATCH 12/26] usb/uhci: generalize initialization, Isaku Yamahata, 2011/03/16
[Qemu-devel] [PATCH 26/26] pc q35 based chipset emulator, Isaku Yamahata, 2011/03/16
[Qemu-devel] [PATCH 05/26] piix_pci: eliminate PIIX3State::pci_irq_levels, Isaku Yamahata, 2011/03/16
[Qemu-devel] ACPI table loading [was: q35 chipset support for native pci express support], Michael Tokarev, 2011/03/16